2014 Flex Workshop Manual

SECTION 206-09: Anti-Lock Brake System (ABS) and Stability Control	2014 Flex Workshop Manual
DIAGNOSIS AND TESTING	Procedure revision date: 09/06/2013

Anti-Lock Brake System (ABS) and Stability Control

Special Tool(s)
	Active Wheel Speed Sensor Tester 105-R0110 or equivalent
	Flex Probe Kit NUD105-R025D or equivalent
	Fluke 77-IV Digital Multimeter FLU77-4 or equivalent
	Vehicle Communication Module (VCM) and Integrated Diagnostic System (IDS) software with appropriate hardware, or equivalent scan tool

DTC Chart

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Section 100-00 for information about these practices.

ABS Module DTC Chart

DTC	Description	Action
P0604:94	Internal Control Module Random Access Memory (RAM) Error: Unexpected Operation	CLEAR the DTCs. CYCLE the ignition switch. REPEAT the self-test. If the DTC is retrieved again, INSTALL a new ABS module. REFER to Anti-Lock Brake System (ABS) Module in this section. REPEAT the self-test.
P062F:44	Internal Control Module EEPROM Error: Data Memory Failure	CLEAR the DTCs. CYCLE the ignition switch. REPEAT the self-test. If the DTC is retrieved again, INSTALL a new ABS module. REFER to Anti-Lock Brake System (ABS) Module in this section. REPEAT the self-test.
C0001:49	TCS Control Channel A Valve 1: Internal Electronic Failure	This DTC indicates that part of the ABS module has failed internally. CLEAR the DTCs. REPEAT the self-test. If the DTC returns, INSTALL a new ABS module. REFER to Anti-Lock Brake System (ABS) Module in this section.
C0002:49	TCS Control Channel A Valve 2: Internal Electronic Failure	This DTC indicates that part of the ABS module has failed internally. CLEAR the DTCs. REPEAT the self-test. If the DTC returns, INSTALL a new ABS module. REFER to Anti-Lock Brake System (ABS) Module in this section.
C0003:49	TCS Control Channel B Valve 1: Internal Electronic Failure	This DTC indicates that part of the ABS module has failed internally. CLEAR the DTCs. REPEAT the self-test. If the DTC returns, INSTALL a new ABS module. REFER to Anti-Lock Brake System (ABS) Module in this section.
C0004:49	TCS Control Channel B Valve 2: Internal Electronic Failure	This DTC indicates that part of the ABS module has failed internally. CLEAR the DTCs. REPEAT the self-test. If the DTC returns, INSTALL a new ABS module. REFER to Anti-Lock Brake System (ABS) Module in this section.
C0020:16	ABS Pump Motor Control: Circuit Voltage Below Threshold	GO to Pinpoint Test C .
C0020:17	ABS Pump Motor Control: Circuit Voltage Above Threshold	GO to Pinpoint Test C .
C0020:49	ABS Pump Motor Control: Internal Electronic Failure	GO to Pinpoint Test C .
C0021:92	Brake Booster Performance: Performance or Incorrect Operation	This DTC indicates that the vacuum in the brake booster is below a certain threshold or the vacuum decreased too much during a brake pedal apply. INSPECT the brake booster and vacuum hoses/tubes for leaks. INSTALL a new brake booster or vacuum hose/tube as necessary.
C0031:01	Left Front Wheel Speed Sensor: General Electrical Failure	GO to Pinpoint Test E .
C0031:12	Left Front Wheel Speed Sensor: Circuit Short to Battery	GO to Pinpoint Test E .
C0031:14	Left Front Wheel Speed Sensor: Circuit Short to Ground/Open	GO to Pinpoint Test E .
C0031:25	Left Front Wheel Speed Sensor: Signal Shape / Waveform Failure	GO to Pinpoint Test D .
C0031:28	Left Front Wheel Speed Sensor: Signal Bias Level Out of Range / Zero Adjustment Failure	GO to Pinpoint Test D .
C0031:2F	Left Front Wheel Speed Sensor: Signal Erratic	GO to Pinpoint Test D .
C0031:4A	Left Front Wheel Speed Sensor: Incorrect Component Installed	This DTC sets when the incorrect type of wheel speed sensor has been installed, bi-directional versus non-bi-directional. REFER to Wheel Speed Sensor in Description and Operation in this section. VERIFY that the correct wheel speed sensor has been installed (part number is stamped on the sensor). If the incorrect wheel speed sensor has been installed, INSTALL a new wheel speed sensor. REFER to Wheel Speed Sensor — Front . CYCLE the ignition. DRIVE the vehicle and reach a speed of at least 20 km/h (12 mph) for the ABS module carry out a wheel speed sensor self test. If the correct wheel speed sensor is installed, INSTALL a new ABS module Anti-Lock Brake System (ABS) Module .
C0031:62	Left Front Wheel Speed Sensor: Signal Compare Failure	GO to Pinpoint Test D .
C0031:65	Left Front Wheel Speed Sensor: Signal Has Too Few Transitions / Events	GO to Pinpoint Test D .
C0031:76	Left Front Wheel Speed Sensor: Wrong Mounting Position	GO to Pinpoint Test D .
C0032:11	Left Front Wheel Speed Sensor Supply: Circuit Short to Ground	GO to Pinpoint Test E .
C0034:01	Right Front Wheel Speed Sensor: General Electrical Failure	GO to Pinpoint Test E .
C0034:12	Right Front Wheel Speed Sensor: Circuit Short to Battery	GO to Pinpoint Test E .
C0034:14	Right Front Wheel Speed Sensor: Circuit Short to Ground/Open	GO to Pinpoint Test E .
C0034:25	Right Front Wheel Speed Sensor: Signal Shape / Waveform Failure	GO to Pinpoint Test D .
C0034:28	Right Front Wheel Speed Sensor: Signal Bias Level Out of Range / Zero Adjustment Failure	GO to Pinpoint Test D .
C0034:2F	Right Front Wheel Speed Sensor: Signal Erratic	GO to Pinpoint Test D .
C0034:4A	Right Front Wheel Speed Sensor: Incorrect Component Installed	This DTC sets when the incorrect type of wheel speed sensor has been installed, bi-directional versus non-bi-directional. REFER to Wheel Speed Sensor in Description and Operation in this section. VERIFY that the correct wheel speed sensor has been installed (part number is stamped on the sensor). If the incorrect wheel speed sensor has been installed, INSTALL a new wheel speed sensor. REFER to Wheel Speed Sensor — Front . CYCLE the ignition. DRIVE the vehicle and reach a speed of at least 20 km/h (12 mph) for the ABS module carry out a wheel speed sensor self test. If the correct wheel speed sensor is installed, INSTALL a new ABS module Anti-Lock Brake System (ABS) Module .
C0034:62	Right Front Wheel Speed Sensor: Signal Compare Failure	GO to Pinpoint Test D .
C0034:65	Right Front Wheel Speed Sensor: Signal Has Too Few Transitions / Events	GO to Pinpoint Test D .
C0034:76	Right Front Wheel Speed Sensor: Wrong Mounting Position	GO to Pinpoint Test D .
C0035:11	Right Front Wheel Speed Sensor Supply: Circuit Short to Ground	GO to Pinpoint Test E .
C0037:01	Left Rear Wheel Speed Sensor: General Electrical Failure	GO to Pinpoint Test F .
C0037:12	Left Rear Wheel Speed Sensor: Circuit Short to Battery	GO to Pinpoint Test F .
C0037:14	Left Rear Wheel Speed Sensor: Circuit Short to Ground/Open	GO to Pinpoint Test F .
C0037:25	Left Rear Wheel Speed Sensor: Signal Shape / Waveform Failure	GO to Pinpoint Test D .
C0037:28	Left Rear Wheel Speed Sensor: Signal Bias Level Out of Range / Zero Adjustment Failure	GO to Pinpoint Test D .
C0037:2F	Left Rear Wheel Speed Sensor: Signal Erratic	GO to Pinpoint Test D .
C0037:4A	Left Rear Wheel Speed Sensor: Incorrect Component Installed	This DTC sets when the incorrect type of wheel speed sensor has been installed, bi-directional versus non-bi-directional. REFER to Wheel Speed Sensor in Description and Operation in this section. VERIFY that the correct wheel speed sensor has been installed (part number is stamped on the sensor). If the incorrect wheel speed sensor has been installed, INSTALL a new wheel speed sensor. REFER to Wheel Speed Sensor — Rear . CYCLE the ignition. DRIVE the vehicle and reach a speed of at least 20 km/h (12 mph) for the ABS module carry out a wheel speed sensor self test. If the correct wheel speed sensor is installed, INSTALL a new ABS module Anti-Lock Brake System (ABS) Module .
C0037:62	Left Rear Wheel Speed Sensor: Signal Compare Failure	GO to Pinpoint Test D .
C0037:65	Left Rear Wheel Speed Sensor: Signal Has Too Few Transitions / Events	GO to Pinpoint Test D .
C0037:76	Left Rear Wheel Speed Sensor: Wrong Mounting Position	GO to Pinpoint Test D .
C0038:11	Left Rear Wheel Speed Sensor Supply: Circuit Short to Ground	GO to Pinpoint Test F .
C003A:01	Right Rear Wheel Speed Sensor: General Electrical Failure	GO to Pinpoint Test F .
C003A:12	Right Rear Wheel Speed Sensor: Circuit Short to Battery	GO to Pinpoint Test F .
C003A:14	Right Rear Wheel Speed Sensor: Circuit Short to Ground/Open	GO to Pinpoint Test F .
C003A:25	Right Rear Wheel Speed Sensor: Signal Shape / Waveform Failure	GO to Pinpoint Test D .
C003A:28	Right Rear Wheel Speed Sensor: Signal Bias Level Out of Range / Zero Adjustment Failure	GO to Pinpoint Test D .
C003A:2F	Right Rear Wheel Speed Sensor: Signal Erratic	GO to Pinpoint Test D .
C003A:4A	Right Rear Wheel Speed Sensor: Incorrect Component Installed	This DTC sets when the incorrect type of wheel speed sensor has been installed, bi-directional versus non-bi-directional. REFER to Wheel Speed Sensor in Description and Operation in this section. VERIFY that the correct wheel speed sensor has been installed (part number is stamped on the sensor). If the incorrect wheel speed sensor has been installed, INSTALL a new wheel speed sensor. REFER to Wheel Speed Sensor — Rear . CYCLE the ignition. DRIVE the vehicle and reach a speed of at least 20 km/h (12 mph) for the ABS module carry out a wheel speed sensor self test. If the correct wheel speed sensor is installed, INSTALL a new ABS module Anti-Lock Brake System (ABS) Module .
C003A:62	Right Rear Wheel Speed Sensor: Signal Compare Failure	GO to Pinpoint Test D .
C003A:65	Right Rear Wheel Speed Sensor: Signal Has Too Few Transitions / Events	GO to Pinpoint Test D .
C003A:76	Right Rear Wheel Speed Sensor: Wrong Mounting Position	GO to Pinpoint Test D .
C003B:11	Right Rear Wheel Speed Sensor Supply: Circuit Short to Ground	GO to Pinpoint Test F .
C0040:64	Brake Pedal Switch A: Signal Plausibility Failure	GO to Pinpoint Test G .
C0051:23	Steering Wheel Position Sensor: Signal Stuck Low	GO to Pinpoint Test R .
C0051:27	Steering Wheel Position Sensor: Signal Rate of Change Above Threshold	GO to Pinpoint Test R .
C0051:29	Steering Wheel Position Sensor: Signal Invalid	GO to Pinpoint Test R .
C0051:54	Steering Wheel Position Sensor: Missing Calibration	GO to Pinpoint Test R .
C0051:64	Steering Wheel Position Sensor: Signal Plausibility Failure	GO to Pinpoint Test R .
C0061:22	Lateral Acceleration Sensor: Sensor Amplitude > Maximum	This DTC indicates a concern with the lateral acceleration sensor which is integral to the RCM . RETRIEVE and RECORD all RCM DTCs. REFER to Section 501-20B . If no RCM DTCs are present, REFER to GO to Pinpoint Test H .
C0061:64	Lateral Acceleration Sensor: Signal Plausibility Failure	This DTC indicates a concern with the lateral acceleration sensor which is integral to the RCM . RETRIEVE and RECORD all RCM DTCs. REFER to Section 501-20B . If no RCM DTCs are present, REFER to GO to Pinpoint Test H .
C0062:22	Longitudinal Acceleration Sensor: Sensor Amplitude > Maximum	This DTC indicates a concern with the lateral acceleration sensor which is integral to the RCM . RETRIEVE and RECORD all RCM DTCs. REFER to Section 501-20B . If no RCM DTCs are present, REFER to GO to Pinpoint Test H .
C0062:23	Longitudinal Acceleration Sensor: Signal Stuck Low	This DTC indicates a concern with the lateral acceleration sensor which is integral to the RCM . RETRIEVE and RECORD all RCM DTCs. REFER to Section 501-20B . If no RCM DTCs are present, REFER to GO to Pinpoint Test H .
C0062:64	Longitudinal Acceleration Sensor: Signal Plausibility Failure	This DTC indicates a concern with the lateral acceleration sensor which is integral to the RCM . RETRIEVE and RECORD all RCM DTCs. REFER to Section 501-20B . If no RCM DTCs are present, REFER to GO to Pinpoint Test H .
C0063:22	Yaw Sensor: Sensor Amplitude > Maximum	This DTC indicates a concern with the lateral acceleration sensor which is integral to the RCM . RETRIEVE and RECORD all RCM DTCs. REFER to Section 501-20B . If no RCM DTCs are present, REFER to GO to Pinpoint Test H .
C0063:64	Yaw Sensor: Signal Plausibility Failure	This DTC indicates a concern with the lateral acceleration sensor which is integral to the RCM . RETRIEVE and RECORD all RCM DTCs. REFER to Section 501-20B . If no RCM DTCs are present, REFER to GO to Pinpoint Test H .
C006B:00	Stability System Active Too Long: No Sub Type Information	This DTC is for informational purposes only and sets along with one or more stability sensor DTCs. RETRIEVE and DIAGNOSE all other ABS module DTCs.
C101A:15	Vacuum Pressure Sensor: Circuit Short to Battery or Open	GO to Pinpoint Test I .
C101A:16	Vacuum Pressure Sensor: Circuit Voltage Below Threshold	GO to Pinpoint Test I .
C101A:29	Vacuum Pressure Sensor: Signal Invalid	GO to Pinpoint Test I .
C1A76:49	Valve Relay: Internal Electronic Failure	This DTC indicates that part of the ABS module has failed internally. CLEAR the DTCs. REPEAT the self-test. If the DTC returns, INSTALL a new ABS module. REFER to Anti-Lock Brake System (ABS) Module in this section.
C1A77:11	Valve Relay Supply Circuit: Circuit Short to Ground	GO to Pinpoint Test s .
C1A78:49	Left Front Inlet Valve: Internal Electronic Failure	This DTC indicates that part of the ABS module has failed internally. CLEAR the DTCs. REPEAT the self-test. If the DTC returns, INSTALL a new ABS module. REFER to Anti-Lock Brake System (ABS) Module in this section.
C1A79:49	Left Front Outlet Valve: Internal Electronic Failure	This DTC indicates that part of the ABS module has failed internally. CLEAR the DTCs. REPEAT the self-test. If the DTC returns, INSTALL a new ABS module. REFER to Anti-Lock Brake System (ABS) Module in this section.
C1A80:49	Right Front Inlet Valve: Internal Electronic Failure	This DTC indicates that part of the ABS module has failed internally. CLEAR the DTCs. REPEAT the self-test. If the DTC returns, INSTALL a new ABS module. REFER to Anti-Lock Brake System (ABS) Module in this section.
C1A81:49	Right Front Outlet Valve: Internal Electronic Failure	This DTC indicates that part of the ABS module has failed internally. CLEAR the DTCs. REPEAT the self-test. If the DTC returns, INSTALL a new ABS module. REFER to Anti-Lock Brake System (ABS) Module in this section.
C1A82:49	Left Rear Inlet Valve: Internal Electronic Failure	This DTC indicates that part of the ABS module has failed internally. CLEAR the DTCs. REPEAT the self-test. If the DTC returns, INSTALL a new ABS module. REFER to Anti-Lock Brake System (ABS) Module in this section.
C1A83:49	Left Rear Outlet Valve: Internal Electronic Failure	This DTC indicates that part of the ABS module has failed internally. CLEAR the DTCs. REPEAT the self-test. If the DTC returns, INSTALL a new ABS module. REFER to Anti-Lock Brake System (ABS) Module in this section.
C1A84:49	Right Rear Inlet Valve: Internal Electronic Failure	This DTC indicates that part of the ABS module has failed internally. CLEAR the DTCs. REPEAT the self-test. If the DTC returns, INSTALL a new ABS module. REFER to Anti-Lock Brake System (ABS) Module in this section.
C1A85:49	Right Rear Outlet Valve: Internal Electronic Failure	This DTC indicates that part of the ABS module has failed internally. CLEAR the DTCs. REPEAT the self-test. If the DTC returns, INSTALL a new ABS module. REFER to Anti-Lock Brake System (ABS) Module in this section.
C1A90:12	Wheel Speed Sensor Supply: Circuit Short to Battery	This DTC indicates that the voltage supplied to the wheel speed sensors is above a pre-determined level. REVIEW all other ABS module DTCs to determine the appropriate pinpoint test. If DTCs C0031:01 and/or C0034:01 are present, GO to Pinpoint Test E . If DTCs C0037:01 and/or C003A:01 are present, GO to Pinpoint Test F .
C1A90:16	Wheel Speed Sensor Supply: Circuit Voltage Below Threshold	This DTC indicates that the voltage supplied to the wheel speed sensors is below a pre-determined level. REVIEW all other ABS module DTCs to determine the appropriate pinpoint test. If DTC U3003:16 is present, GO to Pinpoint Test A .
C1A95:02	Wheel Speed Sensor: General Signal Failure	GO to Pinpoint Test D .
C1A95:2F	Wheel Speed Sensor: Signal Erratic	GO to Pinpoint Test D .
C1A95:4A	Wheel Speed Sensor: Incorrect Component Installed	This DTC sets when at least 1 incorrect type of wheel speed sensor has been installed, bi-directional versus non-bi-directional. REFER to Wheel Speed Sensor in Description and Operation in this section. VERIFY that the correct wheel speed sensor has been installed (part number is stamped on the sensor). If the incorrect wheel speed sensor has been installed, INSTALL a new wheel speed sensor. REFER to Wheel Speed Sensor — Front and/or Wheel Speed Sensor — Rear . CYCLE the ignition. DRIVE the vehicle and reach a speed of at least 20 km/h (12 mph) for the ABS module carry out a wheel speed sensor self test. If the correct wheel speed sensor is installed, INSTALL a new ABS module Anti-Lock Brake System (ABS) Module .
C1A95:62	Wheel Speed Sensor: Signal Compare Failure	GO to Pinpoint Test D .
C1A95:64	Wheel Speed Sensor: Signal Plausibility Failure	GO to Pinpoint Test D .
C1A99:01	Pressure Sensor: General Electric Failure	DIAGNOSE DTC C0040:64 (if present) before diagnosing this DTC. CLEAR the DTCs. REPEAT the self-test. If the DTC returns, VERIFY all HCU and ABS module fasteners are tightened to their correct torque specification. If all fasteners are tightened to their correct torque specification, INSTALL a new HCU . REFER to Hydraulic Control Unit (HCU) in this section.
C1A99:28	Pressure Sensor: Signal Bias Level Out of Range / Zero Adjustment Failure	DIAGNOSE DTC C0040:64 (if present) before diagnosing this DTC. CLEAR the DTCs. REPEAT the self-test. If the DTC returns, VERIFY all HCU and ABS module fasteners are tightened to their correct torque specification. If all fasteners are tightened to their correct torque specification, INSTALL a new HCU . REFER to Hydraulic Control Unit (HCU) in this section.
U0001:16	High Speed CAN Communication Bus: Circuit Voltage Below Threshold	REFER to Section 418-00 to diagnose the no communication concern.
U0001:17	High Speed CAN Communication Bus: Circuit Voltage Above Threshold	REFER to Section 418-00 to diagnose the no communication concern.
U0073:88	Control Module Communication Bus A Off: Bus Off	REFER to Section 418-00 to diagnose the no communication concern.
U0074:88	Control Module Communication Bus B Off: Bus Off	GO to Pinpoint Test H .
U0100:00	Lost Communication With ECM /PCM: No Sub Type Information	GO to Pinpoint Test J .
U0104:00	Lost Communication With C-CM : No Sub Type Information	GO to Pinpoint Test K .
U0131:00	Lost Communication With PSCM : No Sub Type Information	GO to Pinpoint Test L .
U0140:00	Lost Communication With BCM : No Sub Type Information	GO to Pinpoint Test M .
U0151:00	Lost Communication With RCM : No Sub Type Information	GO to Pinpoint Test N .
U0155:00	Lost Communication With IPC Module: No Sub Type Information	GO to Pinpoint Test O .
U0405:81	Invalid Data Received From C-CM : Invalid Serial Data Received	This DTC sets when the ABS module receives invalid network data from the C-CM . RETRIEVE and REPAIR all non-network DTCs in the C-CM . REFER to Section 419-03B .
U0405:83	Invalid Data Received From C-CM : Value of Signal Protection Calculation Incorrect	This DTC sets when the ABS module receives invalid network data from the C-CM . RETRIEVE and REPAIR all non-network DTCs in the C-CM . REFER to Section 419-03B .
U0420:81	Invalid Data Received From PSCM : Invalid Serial Data Received	This DTC sets due to a fault in the EPAS system or because the PSCM is unable to communicate over the HS-CAN bus. RETRIEVE and REPAIR all non-network DTCs in the PSCM . REFER to Section 211-00 .
U0420:82	Invalid Data Received From PSCM : Alive / Sequence Counter Incorrect / Not Updated	This DTC sets due to a fault in the EPAS system or because the PSCM is unable to communicate over the HS-CAN bus. RETRIEVE and REPAIR all non-network DTCs in the PSCM . REFER to Section 211-00 .
U0420:83	Invalid Data Received From PSCM : Value of Signal Protection Calculation Incorrect	This DTC sets due to a fault in the EPAS system or because the PSCM is unable to communicate over the HS-CAN bus. RETRIEVE and REPAIR all non-network DTCs in the PSCM . REFER to Section 211-00 .
U0422:81	Invalid Data Received From BCM : Invalid Serial Data Received	This DTC sets due to a fault in the BCM . RETRIEVE and REPAIR all non-network DTCs in the BCM . REFER to Section 419-10 .
U0452:81	Invalid Data Received From RCM : Invalid Serial Data	This DTC sets when the ABS module receives invalid network data from the RCM . RETRIEVE and REPAIR all non-network DTCs in the RCM . REFER to Section 501-20B .
U0452:82	Invalid Data Received From RCM : Alive / Sequence Counter Incorrect / Not Updated	This DTC sets when the ABS module receives invalid network data from the RCM . RETRIEVE and REPAIR all non-network DTCs in the RCM . REFER to Section 501-20B .
U2007:49	Valve(s): Internal Electronic Failure	CLEAR the DTCs. REPEAT the self-test. If the DTC is retrieved again, INSTALL a new ABS module. REFER to Anti-Lock Brake System (ABS) Module in this section. REPEAT the self-test.
U2100:00	Initial Configuration Not Complete: No Sub Type Information	CHECK the service history for recent service actions related to the ABS. This DTC sets due to incomplete or improper PMI procedures. If there have been recent service actions with this module, REPEAT the PMI using as-built data. If there have been no recent service actions INSTALL a new ABS module. REFER to Anti-Lock Brake System (ABS) Module in this section.
U2101:00	Control Module Configuration Incompatible: No Sub Type Information	CHECK the service history for recent service actions related to the ABS. This DTC sets due to incomplete or improper PMI procedures. If there have been recent service actions with this module, REPEAT the PMI using as-built data. If there have been no recent service actions INSTALL a new ABS module. REFER to Anti-Lock Brake System (ABS) Module in this section.
U2107:00	Collision Mitigation By Braking: No Sub Type Information	This DTC sets when the collision warning request from the C-CM occurs too often or lasts too long. RETRIEVE and REPAIR all DTCs in the C-CM . RETRIEVE and REPAIR all DTCs in the C-CM . REFER to Section 419-03B .
U2108:62	Adaptive Cruise Control: Signal Compare Failure	DIAGNOSE all other ABS module DTCs before diagnosing this DTC. This DTC sets when the ABS module detects an acceleration value that is implausibly higher than what was requested. If there are no other ABS module DTCs present, INSPECT the ABS module electrical connector and REPAIR or INSTALL new as necessary. If the connector is OK, REPEAT the self-test. If the DTC returns, INSTALL a new ABS module. REFER to Anti-Lock Brake System (ABS) Module in this section.
U2200:00	Control Module: No Sub Type Information	CLEAR the DTCs. CARRY OUT the ABS module self-test. RETRIEVE and RECORD all DTCs. If the DTC returns, INSTALL a new ABS module. REFER to Anti-Lock Brake System (ABS) Module in this section.
U3000:44	Control Module: Data Memory Failure	CLEAR the DTCs. CARRY OUT the ABS module self-test. RETRIEVE and RECORD all DTCs. If the DTC returns, INSTALL a new ABS module. REFER to Anti-Lock Brake System (ABS) Module in this section.
U3000:45	Control Module: Program Memory Failure	CLEAR the DTCs. CARRY OUT the ABS module self-test. RETRIEVE and RECORD all DTCs. If the DTC returns, INSTALL a new ABS module. REFER to Anti-Lock Brake System (ABS) Module in this section.
U3000:46	Control Module: Calibration / Parameter Memory Failure	This DTC sets due to incomplete or incorrect module programming, or due to an internal failure of the module. If the module has just recently been reprogrammed, ATTEMPT to program the module using as-built data. If the DTC returns, INSTALL a new ABS module. REFER to Anti-Lock Brake System (ABS) Module in this section.
U3000:49	Control Module: Internal Electronic Failure	CLEAR the DTCs. CARRY OUT the ABS module self-test. RETRIEVE and RECORD all DTCs. If the DTC returns, INSTALL a new ABS module. REFER to Anti-Lock Brake System (ABS) Module in this section.
U3000:4B	Control Module: Over Temperature	This DTC sets if the signal from the temperature sensor internal to the ABS module is out of range or is implausible when compared to the temperature sensors inside the HCU . Allow the vehicle to cool down for 15 minutes. CLEAR the DTCs. REPEAT the self-test. If the DTC returns, INSTALL a new ABS module. REFER to Anti-Lock Brake System (ABS) Module in this section.
U3002:62	Vehicle Identification Number: Signal Compare Failure	GO to Pinpoint Test P .
U3003:16	Battery Voltage: Circuit Voltage Below Threshold	GO to Pinpoint Test A .
U3003:17	Battery Voltage: Circuit Voltage Below Threshold	GO to Pinpoint Test B .

Symptom Chart

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Section 100-00 for information about these practices.

Symptom Chart
Condition	Possible Sources	Action
No communication with the ABS module	Fuse(s) Wiring, terminals or connectors ABS module	REFER to Section 418-00 to diagnose the no communication problem.
The red brake warning indicator is always/never on	Low brake fluid level Brake fluid level sensor Parking brake applied Parking brake switch Brake booster vacuum sensor IPC concern ABS concern	RETRIEVE all ABS module DTCs and REFER to the ABS DTC Chart in this section. If no ABS module DTCs are present, REFER to Diagnosis and Testing in Section 413-01 .
The yellow ABS warning indicator is always/never on	IPC concern ABS concern	RETRIEVE all ABS module DTCs and REFER to the ABS DTC Chart in this section. If no ABS module DTCs are present, REFER to Diagnosis and Testing in Section 413-01 .
The stability/traction control indicator "sliding-car icon" is always/never on	IPC concern ABS concern	RETRIEVE all ABS module DTCs and REFER to the ABS DTC Chart in this section. If no ABS module DTCs are present, REFER to Diagnosis and Testing in Section 413-01 .
ABS false activation, ABS too sensitive, ABS activates on normal stop	Front/rear suspension concern	ELIMINATE the front/rear suspension as the cause of the problem. REFER to Section 204-00 .
	RCM mounting	CONFIRM the RCM is mounted correctly. REFER to Section 501-20B .
	Loose wheel speed sensor/excessive air gap	INSPECT wheel speed sensor for looseness or excessive air gap. TIGHTEN or INSTALL new as necessary. REFER to Wheel Speed Sensor — Front and/or Wheel Speed Sensor — Rear in this section.
	Wheel speed sensor magnetic strip (encoder) damaged, rusted or contaminated with foreign material	INSPECT the encoder for damage, rust and foreign material. CLEAN, REMOVE foreign material or INSTALL new as necessary. REFER to Wheel Bearing and Wheel Hub in Section 204-01 or Section 204-02 .
	Parking brake shoes out of adjustment (dragging)	CHECK and if necessary, ADJUST the parking brake shoes.
The stability/traction control system is inoperative or cannot be disabled	Refer to the Diagnostic Routine	GO to Pinpoint Test Q .

Diagnostic Routines

Pinpoint Test A: DTC U3003:16

Diagnostic Overview

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Section 100-00 for information about these practices.

Refer to Wiring Diagrams Cell 42 , Vehicle Dynamic Systems for schematic and connector information.

Normal Operation and Fault Conditions

The ABS module, hydraulic pump and solenoid valves require an operating voltage that is between 10 and 17 volts. The ABS module receives this voltage from the BJB . The ABS module has a single ground circuit located in the engine compartment wiring harness. Excessive resistance or an open in one or more of these circuits, a discharged battery or a inoperative charging system will result in the ABS module setting a DTC.

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Conditions
U3003:16	Battery Voltage: Circuit Voltage Below Threshold	This DTC sets in continuous memory and on-demand if the voltage supplied to the ABS module falls below 10 volts.

Possible Sources

Fuse(s)
Wiring, terminals or connectors
Charging system concern
Battery
ABS module

Visual Inspection and Diagnostic Pre-checks

Make sure the vehicle battery terminals and cables are free of any corrosion and other contaminants.

Make sure the vehicle battery terminals are tightened to their correct torque specifications.

Make sure BJB fuses 5 (50A), 43 (20A) and 89 (10A) are OK.

PINPOINT TEST A: DTC U3003:16

NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may cause damage to the connector.

Test Step

Result / Action to Take

A1 RECHECK THE ABS MODULE DTCS

Ignition ON.
Using a scan tool, clear the ABS module DTCs.
Ignition OFF.
Ignition ON.
Enter the following diagnostic mode on the scan tool: Self Test — ABS Module .
Is DTC U3003:16 still present?

Yes
GO to A2 .

No
The system is operating correctly at this time. The DTC may have set due to a previous low battery voltage condition.

A2 CHECK FOR CHARGING SYSTEM DTCS IN THE PCM

Enter the following diagnostic mode on the scan tool: Self Test — PCM KOEO .
Are any charging system DTCs present in the PCM?

Yes
REFER to Section 414-00 to diagnose the charging system.

No
GO to A3 .

A3 CHECK THE BATTERY CONDITION AND STATE OF CHARGE

Check the battery condition and verify the battery is fully charged. Refer to Section 414-01 .
Is the battery OK and fully charged?

Yes
GO to A4 .

No
INSTALL a new battery. REFER to Section 414-01 .

A4 CHECK THE ABS MODULE SUPPLY VOLTAGE (VPWR_ABS) PID

Ignition ON.
Measure and record the voltage at the battery.
Using a scan tool, monitor the VPWR_ABS PID .
Is the PID display within 0.2 volt of the recorded battery voltage?

Yes
GO to A7 .

No
GO to A5 .

A5 CHECK THE ABS MODULE VOLTAGE SUPPLY

Ignition OFF.
Disconnect: ABS Module C135 .
Ignition ON.
Measure the voltage between:

Positive Lead		Negative Lead
Pin	Circuit	Pin	Circuit
C135-1	SBB05 (GY/RD)	—	Ground
C135-25	SBB43 (BU/RD)	—	Ground
C135-28	CBB89 (VT/GY)	—	Ground

Is each voltage within 0.2 volt of the recorded battery voltage?

Yes
GO to A6 .

No
VERIFY fuses 5 (50A), 43 (20A) and/or 89 (10A) are OK.

If not OK, REFER to the Wiring Diagrams manual to identify the cause of the circuit short. If OK, REPAIR the affected circuit for high resistance or an open.

A6 CHECK THE ABS MODULE GROUND CIRCUIT FOR AN OPEN

Ignition OFF.
Disconnect the battery negative cable. Refer to Section 414-01 .
Measure the resistance between:

Positive Lead		Negative Lead
Pin	Circuit	Pin	Circuit
C135-13	GD120 (BK/GN)	—	Ground
C135-38	GD120 (BK/GN)	—	Ground

Is the resistance less than 3 ohms?

Yes
GO to A7 .

No
REPAIR the affected circuit(s).

A7 CHECK FOR CORRECT ABS MODULE OPERATION

Inspect the ABS module electrical connector.
Repair:

corrosion (install new connector or terminal - clean module pins)
damaged or bent pins - install new terminals/pins
pushed-out pins - install new pins as necessary

Connect the battery negative cable. Refer to Section 414-01 .
Connect: ABS Module C135 .
Make sure the connector seats and latches correctly, then operate the system and determine if the concern is still present.
Is the concern still present?

Yes
CHECK for any applicable TSBs. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW the TSB instructions.

If no TSBs address this concern, INSTALL a new ABS module. REFER to Anti-Lock Brake System (ABS) Module in this section.

No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.

Pinpoint Test B: DTC U3003:17

Diagnostic Overview

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Section 100-00 for information about these practices.

Refer to Wiring Diagrams Cell 42 , Vehicle Dynamic Systems for schematic and connector information.

Normal Operation and Fault Conditions

The ABS module, hydraulic pump and solenoid valves require an operating voltage that is between 10 and 17 volts. The ABS module receives this voltage from the BJB . The ABS module has a single ground circuit located in the engine compartment wiring harness. An overcharging condition in the charging system will result in the ABS module setting a DTC. This DTC may also set in the ABS module due to battery charging or vehicle jump starting events.

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Conditions
U3003:17	Battery Voltage: Circuit Voltage Above Threshold	This DTC sets in continuous memory and on-demand if the voltage supplied to the ABS module is above 17 volts with vehicle speed greater than 10 km/h (6.2 mph). This DTC may also set in the ABS module due to battery charging or vehicle jump starting events.

Possible Sources

Charging system concern
ABS module

PINPOINT TEST B: DTC U3003:17

Test Step	Result / Action to Take
B1 CHECK FOR HIGH VOLTAGE DTCS SET IN OTHER MODULES
Ignition ON. Enter the following diagnostic mode on the scan tool: Self Test — All CMDTCs . Is DTC B1317, B1318, B1676, U3003:16 or U3003:17 present in one or more modules AND are any charging system DTCs present in the PCM?	Yes REFER to Section 414-00 to diagnose an overcharging condition. No GO to B2 .
B2 CHECK THE BATTERY VOLTAGE
Turn off all interior/exterior lights and accessories. NOTE: Do not allow the engine speed to increase above 2,000 RPM while performing this step or the generator may self-excite and result in default charging system output voltage. If engine speed goes above 2,000 RPM, turn the vehicle off and restart the engine before performing this step. Start and run the engine at approximately 1,500 RPM for 3 minutes while monitoring the battery voltage. Is the battery voltage between 13 and 15.2 volts ?	Yes GO to B3 . No REFER to Section 414-00 to diagnose an overcharging condition.
B3 RECHECK THE ABS MODULE FOR DTC U3003:17
Turn the engine off. Ignition ON. Enter the following diagnostic mode on the scan tool: Self Test — ABS Module . Using a scan tool, clear the ABS module DTCs. Ignition OFF. Ignition ON. Enter the following diagnostic mode on the scan tool: Self Test — ABS Module . Is DTC U3003:17 still present?	Yes GO to B4 . No The system is operating normally at this time. The DTC may have been set previously during battery charging or while jump starting the vehicle.
B4 CHECK FOR CORRECT ABS MODULE OPERATION
Ignition OFF. Disconnect and inspect the ABS Module electrical connector. Repair: corrosion (install new connector or terminal - clean module pins) damaged or bent pins - install new terminals/pins pushed-out pins - install new pins as necessary Connect: ABS Module C135 . Make sure the connector seats and latches correctly, then operate the system and determine if the concern is still present. Is the concern still present?	Yes CHECK OASIS for any applicable TSBs. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW the TSB instructions. If no TSBs address this concern, INSTALL a new ABS module. REFER to Anti-Lock Brake System (ABS) Module in this section. No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.

Pinpoint Test C: DTCs C0020:16, 17 and 49

Diagnostic Overview

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Section 100-00 for information about these practices.

Refer to Wiring Diagrams Cell 42 , Vehicle Dynamic Systems for schematic and connector information.

Normal Operation and Fault Conditions

The ABS module uses an internal solid state switch to operate the hydraulic pump motor. The ABS module tests the hydraulic pump motor by activating it for 30 milliseconds. While the pump motor is being activated, the ABS module monitors the voltage drop across the hydraulic pump motor solid state switch and the amount of current the hydraulic pump motor draws through the solid state switch. If the voltage drop is too high or if the hydraulic pump motor is drawing too much current, the ABS module sets a DTC. After 30 milliseconds have passed, the ABS module stops applying voltage to the pump motor and observes the voltage that the spinning hydraulic pump motor is generating. The voltage generated by the motor indicates how fast the motor is spinning. Voltage that is too low indicates the motor is not spinning freely and a DTC sets.

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Conditions
C0020:16	ABS Pump Motor Control: Circuit Voltage Below Threshold	This DTC sets in continuous memory and on-demand if the voltage supplied to the ABS module for the hydraulic pump motor falls below 10 volts.
C0020:17	ABS Pump Motor Control: Circuit Voltage Above Threshold	This DTC sets in continuous memory and on-demand if the voltage generated by the hydraulic pump motor as it slows down is more than 1 volt above the set threshold.
C0020:49	ABS Pump Motor Control: Internal Electrical Failure	This DTC sets in continuous memory and on-demand if the hydraulic pump motor relay is shorted due to excessive voltage.

Possible Sources

Fuse
Wiring, terminals or connectors
HCU
ABS module

PINPOINT TEST C: C0020:16, 17 AND 49

NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may cause damage to the connector.

Test Step

Result / Action to Take

C1 CHECK THE ABS MODULE PUMP MOTOR (PMP_MOTOR) ACTIVE COMMAND

Ignition ON.
Using a scan tool, toggle the PMP_MOTOR active command ON and listen for the ABS pump motor noise.
Does the ABS pump motor run for approximately 2 seconds?

Yes
TOGGLE the PMP_MOTOR active command OFF. GO to C2 .

No
TOGGLE the PMP_MOTOR active command OFF. GO to C3 .

C2 CHECK FOR FAULT REPEATABILITY

Using a scan tool, clear the ABS module DTCs.
Drive the vehicle at speeds greater than 20 km/h (12 mph).
Bring the vehicle to a safe stop.
Enter the following diagnostic mode on the scan tool: Self Test — ABS Module .
Are DTCs C0020:16, 17 or 49 present?

Yes
GO to C3 .

No
For all other DTCs, REFER to the ABS Module DTC Chart in this section.

If no DTCs are present, the system is operating correctly at this time.

C3 CHECK THE ABS MODULE GROUND EYELET AT THE CHASSIS

Ignition OFF.
Remove the bolt retaining the ABS module ground to the vehicle.
Refer to Wiring Diagrams Cell 42 , Vehicle Dynamic Systems for schematic and connector information.
Clean the body mating surface and ground eyelets.
Position the ground eyelets and install the bolt.
Ignition ON.
Using a scan tool, clear the ABS module DTCs.
Drive the vehicle at speeds greater than 20 km/h (12 mph).
Bring the vehicle to a safe stop.
Enter the following diagnostic mode on the scan tool: Self Test — ABS Module .
Are DTCs C0020:16, 17 or 49 present?

Yes
GO to C4 .

No
If no DTCs are present, the concern was most likely caused by a loose or corroded connector.

For all other DTCs, REFER to the ABS Module DTC Chart in this section.

C4 CHECK THE PUMP MOTOR VOLTAGE SUPPLY TO THE ABS MODULE

Ignition OFF.
Disconnect: ABS Module C135 .
Measure the voltage between:

Positive Lead		Negative Lead
Pin	Circuit	Pin	Circuit
C135-1	SBB05 (GY/RD)	—	Ground

Is the voltage greater than 11 volts?

Yes
GO to C5 .

No
VERIFY that fuse 5 (50A) is OK. If OK, REPAIR the circuit. If not OK, REFER to the Wiring Diagrams manual to identify the cause of the circuit short.

C5 CHECK THE ABS MODULE GROUND CIRCUIT FOR AN OPEN

Disconnect the battery negative cable. Refer to Section 414-01 .
Measure the resistance between:

Positive Lead		Negative Lead
Pin	Circuit	Pin	Circuit
C135-13	GD120 (BK/GN)	—	Ground

Is the resistance less than 3 ohms?

Yes
GO to C6 .

No
REPAIR the circuit.

C6 CHECK FOR CORRECT ABS MODULE OPERATION

Inspect the ABS module electrical connector.
Repair:

corrosion (install new connector or terminal - clean module pins)
damaged or bent pins - install new terminals/pins
pushed-out pins - install new pins as necessary

Connect the battery negative cable. Refer to Section 414-01 .
Connect: ABS Module C135 .
Make sure the connector seats and latches correctly, then operate the system and determine if the concern is still present.
Is the concern still present?

Yes
CHECK for any applicable TSBs. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW the TSB instructions.

If no TSBs address this concern, INSTALL a new ABS module. REFER to Anti-Lock Brake System (ABS) Module in this section.

No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.

Pinpoint Test D: Wheel Speed Sensor Erratic Signal DTCs

Diagnostic Overview

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Section 100-00 for information about these practices.

Refer to Wiring Diagrams Cell 42 , Vehicle Dynamic Systems for schematic and connector information.

Normal Operation and Fault Conditions

The wheel speed sensor utilizes the magnetic strip on the wheel bearing to generate a square wave signal proportional to wheel speed that is sent to the ABS module. The wheel bearing, magnetic strip and wheel speed sensor must be undamaged and free from any contamination to produce a clean signal for use by the ABS module. Also, all 4 tires and wheels must be of the same, manufacturer recommended size for the wheel speed sensor to generate an accurate wheel speed. Certain high frequency signals will interrupt the signals sent by the wheel speed sensors resulting in a temporary loss of the signal.

To clear any wheel speed sensor DTCs from the ABS module, after repairing the cause of the DTC, cycle the ignition from ON to OFF and back to ON. Then drive the vehicle for at least 1 minute at speeds above 20 km/h (12 mph).

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Conditions
C0031:25	Left Front Wheel Speed Sensor: Signal Shape / Waveform Failure	These DTCs set in continuous memory when there is inconsistencies in the signal generated by the wheel speed sensor.
C0034:25	Right Front Wheel Speed Sensor: Signal Shape / Waveform Failure
C0037:25	Left Rear Wheel Speed Sensor: Signal Shape / Waveform Failure
C003A:25	Right Rear Wheel Speed Sensor: Signal Shape / Waveform Failure
C0031:28	Left Front Wheel Speed Sensor: Signal Bias Level Out of Range / Zero Adjustment Failure	These DTCs set in continuous memory when the ABS module detects a wheel speed signal that is out of range (above a pre-determined threshold) for more than 5 seconds.
C0034:28	Right Front Wheel Speed Sensor: Signal Bias Level Out of Range / Zero Adjustment Failure
C0037:28	Left Rear Wheel Speed Sensor: Signal Bias Level Out of Range / Zero Adjustment Failure
C003A:28	Right Rear Wheel Speed Sensor: Signal Bias Level Out of Range / Zero Adjustment Failure
C0031:2F	Left Front Wheel Speed Sensor: Signal Erratic	These DTCs set in continuous memory when there is interference or a signal disturbance on 1 or 2 wheel speed sensors.
C0034:2F	Right Front Wheel Speed Sensor: Signal Erratic
C0037:2F	Left Rear Wheel Speed Sensor: Signal Erratic
C003A:2F	Right Rear Wheel Speed Sensor: Signal Erratic
C0031:62	Left Front Wheel Speed Sensor: Signal Compare Failure	These DTCs set in continuous memory when the signal sent by 1 of the wheel speed senors does not match the signals sent by the other 3 wheel speed sensors.
C0034:62	Right Front Wheel Speed Sensor: Signal Compare Failure
C0037:62	Left Rear Wheel Speed Sensor: Signal Compare Failure
C003A:62	Right Rear Wheel Speed Sensor: Signal Compare Failure
C0031:65	Left Front Wheel Speed Sensor: Signal Has Too Few Transitions / Events	This DTC sets in continuous memory when the signal sent by the wheel speed sensor is inconsistent when compared to the previous performance of that same sensor.
C0034:65	Right Front Wheel Speed Sensor: Signal Has Too Few Transitions / Events
C0037:65	Left Rear Wheel Speed Sensor: Signal Has Too Few Transitions / Events
C003A:65	Right Rear Wheel Speed Sensor: Signal Has Too Few Transitions / Events
C0031:76	Left Front Wheel Speed Sensor: Wrong Mounting Position	This DTC sets in continuous memory due to the pulse width of the signal sent by the wheel speed sensor becoming smaller.
C0034:76	Right Front Wheel Speed Sensor: Wrong Mounting Position
C0037:76	Left Rear Wheel Speed Sensor: Wrong Mounting Position
C003A:76	Right Rear Wheel Speed Sensor: Wrong Mounting Position
C1A95:02	Wheel Speed Sensor: General Signal Failure	This DTC sets in continuous memory and on-demand when 3 or more wheel speed sensor signals are affected by a failure at the same time.
C1A95:2F	Wheel Speed Sensor: Signal Erratic	This DTC sets in continuous memory when there is interference or a signal disturbance on more than 1 wheel speed sensor. This is most likely due to a damaged wheel speed sensor magnetic strip, or an incorrectly installed wheel bearing. This DTC also sets if an incorrectly sized tire is installed on the vehicle, an incorrect wheel bearing is installed or high frequency interference is present.
C1A95:62	Wheel Speed Sensor: Signal Compare Failure	This DTC sets in continuous memory when the signal sent by 1 of the wheel speed senors does not match the signals sent by the other 3 wheel speed sensors.
C1A95:64	Wheel Speed Sensor: Signal Plausibility Failure	This DTC sets in continuous memory when the ABS module detects a wheel speed signal that is out of range (above or below a pre-determined threshold) for more than 5 seconds.

Possible Sources

Underinflated tires
Incorrect/mismatched tires
Wheel bearings
Wheel speed sensor magnetic strips
Wheel speed sensors
Wiring, terminals or connectors
ABS module

PINPOINT TEST D: WHEEL SPEED SENSOR ERRATIC SIGNAL DTCS

Test Step	Result / Action to Take
D1 CHECK THE DTCS FROM THE ABS MODULE SELF-TEST
Ignition ON. Enter the following diagnostic mode on the scan tool: Self Test — ABS Module . Is DTC C0031:01, 12, 14; C0032:11; C0035:11; C0034:01, 12, 14; C0037:01, 12, 14; C0038:11; C003A:01, 12, 14 and/or C003B:11 present?	Yes For DTC C0031:01, 12, 14; C0034:01, 12, 14; C0032:11 or C0035:11, GO to Pinpoint Test E . For DTC C0037:01, 12, 14; C003A:01, 12, 14; C0038:11 or C003B:11, GO to Pinpoint Test F . No GO to D2 .
D2 CHECK THE TIRES SIZE AND PRESSURE
Verify that all tires and wheels are the same size and that the tire size and inflation pressures are correct as indicated on the VC label. Are the wheels and tires OK?	Yes GO to D3 . No INSTALL the correct size tire or ADJUST tire pressure as necessary. CYCLE the ignition. DRIVE the vehicle for at least 1 minute at speeds above 20 km/h (12 mph).
D3 CHECK THE WHEEL SPEED SENSOR AND HARNESS FOR DAMAGE
Ignition OFF. With the vehicle in NEUTRAL, position it on a hoist. Refer to Jacking and Lifting in Section 100-02 . NOTE: Examine the wheel speed sensor wire carefully with a good light source. Failure to verify damage in the wheel speed sensor wire can lead to unnecessary installation of a new component. Inspect the wheel speed sensor and harness for abrasion, broken connector tabs or water intrusion. Is the wheel speed sensor and harness OK?	Yes GO to D4 . No INSTALL a new wheel speed sensor. REFER to Wheel Speed Sensor — Front or Wheel Speed Sensor — Rear in this section. CYCLE the ignition. DRIVE the vehicle for at least 1 minute at speeds above 20 km/h (12 mph).
D4 INSPECT THE WHEEL SPEED SENSOR MOUNTING
Inspect the wheel speed sensor and fastener for looseness and correct installation. Are the wheel speed sensor and fastener tight and correctly installed?	Yes GO to D5 . No Correctly INSTALL the wheel speed sensor and/or TIGHTEN the wheel speed sensor bolt to specification. REFER to Wheel Speed Sensor — Front , Wheel Speed Sensor — Rear or Torque Specifications in this section. CYCLE the ignition. DRIVE the vehicle for at least 1 minute at speeds above 20 km/h (12 mph).
D5 CHECK THE WHEEL BEARINGS AND MAGNETIC STRIPS FOR DAMAGE
Inspect the wheel bearings for abnormal wear or roughness and for deformation or contamination of the seal and magnetic strip. Are the wheel bearing(s) OK?	Yes INSTALL a new wheel speed sensor. REFER to Wheel Speed Sensor — Front or Wheel Speed Sensor — Rear . CYCLE the ignition. DRIVE the vehicle at a speed greater than 20 km/h (12 mph). CARRY OUT the ABS module self-test. If the original DTC returns, GO to D6 . If a different DTC returns, REFER to the ABS Module DTC Chart in this section. No INSTALL a new wheel bearing as necessary. For front wheel bearings, REFER to Section 204-01 . For rear wheel bearings, Section 204-02 . CYCLE the ignition. DRIVE the vehicle for at least 1 minute at speeds above 20 km/h (12 mph).
D6 MONITOR THE ABS MODULE WHEEL SPEED SENSOR PIDs
Ignition ON. Using a scan tool, monitor the following PIDs while an assistant drives the vehicle at a speed greater than 20 km/h (12 mph). Left front wheel speed sensor (LF_WSPD) Right front wheel speed sensor (RF_WSPD) Left rear wheel speed sensor (LR_WSPD) Right rear wheel speed sensor (RR_WSPD) Are the wheel speed PIDs within 5 km/h (3 mph) of each other and the vehicle speed as indicated on the speedometer?	Yes GO to D7 . No CYCLE the ignition. DRIVE the vehicle at a speed greater than 20 km/h (12 mph). CARRY OUT the ABS module self-test. If the original DTC returns, GO to D8 . If a different DTC returns, REFER to the ABS Module DTC Chart in this section.
D7 CHECK THE HARNESS AND CONNECTORS
Disconnect: Suspect Wheel Speed Sensor . Disconnect: ABS Module C135 . Inspect the connectors (including any in-line connectors) for: corrosion loose or spread terminals loose or frayed wire connections at terminals water intrusion Were any concerns found?	Yes REPAIR as necessary. Refer to Wiring Diagrams Cell 5 for schematic and connector information. CYCLE the ignition. DRIVE the vehicle for at least 1 minute at speeds above 20 km/h (12 mph). No The fault is not present and cannot be recreated at this time. Do not install any new ABS components at this time. Install ABS components only when directed to do so in the pinpoint test.
D8 CHECK FOR CORRECT ABS MODULE OPERATION
Ignition OFF. Disconnect and inspect the ABS module electrical connector. Repair: corrosion (install new connector or terminal - clean module pins) damaged or bent pins - install new terminals/pins pushed-out pins - install new pins as necessary Connect: ABS Module C135 . Make sure the connector seats and latches correctly, then operate the system and determine if the concern is still present. Is the concern still present?	Yes CHECK OASIS for any applicable TSBs. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW the TSB instructions. If no TSBs address this concern, INSTALL a new ABS module. REFER to Anti-Lock Brake System (ABS) Module in this section. CYCLE the ignition. DRIVE the vehicle for at least 1 minute at speeds above 20 km/h (12 mph). No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues. CYCLE the ignition. DRIVE the vehicle for at least 1 minute at speeds above 20 km/h (12 mph).

Pinpoint Test E: Wheel Speed Sensor Electrical Fault DTCs — Front

Diagnostic Overview

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Section 100-00 for information about these practices.

Refer to Wiring Diagrams Cell 42 , Vehicle Dynamic Systems for schematic and connector information.

Normal Operation and Fault Conditions

Refer to Wheel Speed Sensor in Description and Operation in this section.

When the ignition is set to ON, the ABS module carries out a self-test by sending a reference voltage through the wheel speed sensors and their circuitry. An open circuit, a short to ground or a short to voltage in any wheel speed circuit causes the ABS module to disable the power output to that sensor(s) and set 1 or more DTCs.

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Conditions
C0031:01	Left Front Wheel Speed Sensor: General Electrical Failure	These DTCs set in continuous memory and on demand when there is a short to voltage, a short to ground or an open circuit on 1 or both of the wheel speed sensor circuits.
C0034:01	Right Front Wheel Speed Sensor: General Electrical Failure
C0031:12	Left Front Wheel Speed Sensor: Circuit Short to Battery	These DTCs set in continuous memory and on demand when the ABS module detects short to voltage on 1 or both of the wheel speed sensor circuits.
C0034:12	Right Front Wheel Speed Sensor: Circuit Short to Battery
C0031:14	Left Front Wheel Speed Sensor: Circuit Short to Ground or Open	These DTCs set in continuous memory and on demand when the ABS module detects short to ground or an open condition on 1 or both of the wheel speed sensor circuits.
C0034:14	Right Front Wheel Speed Sensor: Circuit Short to Ground or Open
C0032:11	Left Front Wheel Speed Sensor Supply: Circuit Short to Ground	These DTCs set in continuous memory and on demand when the ABS module detects short to ground or an open condition on the wheel speed sensor voltage supply circuit.
C0035:11	Right Front Wheel Speed Sensor Supply: Circuit Short to Ground

Possible Sources

Wiring, terminals or connectors
Wheel speed sensors
ABS module

Visual Inspection and Diagnostic Pre-checks

Make sure the wheel speed sensor harness is routed correctly and is undamaged.

Make sure the wheel speed sensor electrical connector is free from any corrosion or other contaminants.

PINPOINT TEST E: WHEEL SPEED SENSOR ELECTRICAL FAULT DTCs — FRONT

NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may cause damage to the connector.

Test Step

Result / Action to Take

E1 CHECK FOR FAULT REPEATABILITY

Ignition ON.
Using a scan tool, clear all ABS module DTCs.
Test drive the vehicle above 20 km/h (12 mph) for at least 1 minute.
Bring the vehicle to a safe stop.
Ignition OFF.
Ignition ON.
Enter the following diagnostic mode on the scan tool: Self Test — ABS Module .
Is the DTC still present?

Yes
If the vehicle is equipped with active park assist, GO to E4 . If the vehicle is not equipped with active park assist and the Rotunda ABS Active Wheel Speed Sensor Tester is not available, GO to E4 . If the vehicle is not equipped with active park assist and the Rotunda ABS Active Wheel Speed Sensor Tester is available, GO to E2 .

No
The system is operating correctly at this time. INSPECT both front wheel speed sensor electrical connectors and the ABS module electrical connector. REPAIR or CLEAN the connector as necessary. ADDRESS the root cause of any connector or pin issues.

CYCLE the ignition. DRIVE the vehicle for at least 1 minute at speeds above 20 km/h (12 mph).

E2 CHECK THE ABS MODULE OUTPUT USING THE ROTUNDA ABS ACTIVE WHEEL SPEED SENSOR TESTER

Ignition OFF.
Disconnect: Suspect Wheel Speed Sensor .
Connect the Rotunda ABS Active Wheel Speed Sensor Tester to the wheel speed sensor connectors.
Ignition ON.
Select the correct system polarity on the Rotunda ABS Active Wheel Speed Sensor Tester and turn the power switch to the ON position.
Is the tester output LED illuminated?

Yes
GO to E3 .

No
GO to E5 .

E3 CHECK THE WHEEL SPEED SENSOR OUTPUT WITH THE ROTUNDA ABS ACTIVE WHEEL SPEED SENSOR TESTER

Raise the suspect wheel until it can spin freely. REFER to Lifting Points in Section 100-02 .
While monitoring the Rotunda ABS Active Wheel Speed Sensor Tester, slowly spin the suspect wheel.
Do the sensor output LEDs illuminate and flash and is the current overload LED not illuminated?

Yes
The system is operating correctly at this time. INSPECT all wheel speed sensor electrical connectors and the ABS module electrical connectors. REPAIR or CLEAN the connector as necessary. ADDRESS the root cause of any connector or pin issues.

CYCLE the ignition. DRIVE the vehicle for at least 1 minute at speeds above 20 km/h (12 mph).

No
INSTALL a new wheel speed sensor. REFER to Wheel Speed Sensor — Front in this section.

CYCLE the ignition. DRIVE the vehicle for at least 1 minute at speeds above 20 km/h (12 mph).

E4 CHECK THE WHEEL SPEED SENSOR CIRCUITS FOR A SHORT TO BATTERY VOLTAGE

Ignition OFF.
Disconnect: ABS Module C135 .
Disconnect: Suspect Wheel Speed Sensor .
Ignition ON.
Measure the voltage between:

Positive Lead		Negative Lead
Pin	Circuit	Pin	Circuit
LF Wheel Speed Sensor
C150-1	VCA03 (VT/WH)	—	Ground
C150-2	RCA17 (YE)	—	Ground
RF Wheel Speed Sensor
C160-1	VCA05 (GY/VT)	—	Ground
C160-2	RCA19 (VT)	—	Ground

Is any voltage present?

Yes
REPAIR the affected circuit(s).

CYCLE the ignition. DRIVE the vehicle for at least 1 minute at speeds above 20 km/h (12 mph).

No
GO to E5 .

E5 CHECK THE WHEEL SPEED SENSOR CIRCUITS FOR AN OPEN

Ignition OFF.
Measure the resistance between:

Positive Lead		Negative Lead
Pin	Circuit	Pin	Circuit
LF Wheel Speed Sensor
C135-19	VCA03 (VT/WH)	C150-1	VCA03 (VT/WH)
C135-8	RCA17 (YE)	C150-2	RCA17 (YE)
RF Wheel Speed Sensor
C135-16	VCA05 (GY/VT)	C160-1	VCA05 (GY/VT)
C135-4	RCA19 (VT)	C160-2	RCA19 (VT)

Are the resistances less than 3 ohms?

Yes
GO to E6 .

No
REPAIR the affected circuit(s).

CYCLE the ignition. DRIVE the vehicle for at least 1 minute at speeds above 20 km/h (12 mph).

E6 CHECK FOR SHORTED WHEEL SPEED SENSOR CIRCUITS

Measure the resistance between:

Positive Lead		Negative Lead
Pin	Circuit	Pin	Circuit
LF Wheel Speed Sensor
C150-1	VCA03 (VT/WH)	C150-2	RCA17 (YE)
RF Wheel Speed Sensor
C160-1	VCA05 (GY/VT)	C160-2	RCA19 (VT)

Is the resistance greater 10,000 ohms?

Yes
GO to E7 .

No
REPAIR the affected circuit(s).

CYCLE the ignition. DRIVE the vehicle for at least 1 minute at speeds above 20 km/h (12 mph).

E7 CHECK THE WHEEL SPEED SENSOR CIRCUITS FOR A SHORT TO GROUND

Measure the resistance between:

Positive Lead		Negative Lead
Pin	Circuit	Pin	Circuit
LF Wheel Speed Sensor
C150-1	VCA03 (VT/WH)	—	Ground
C150-2	RCA17 (YE)	—	Ground
RF Wheel Speed Sensor
C160-1	VCA05 (GY/VT)	—	Ground
C160-2	RCA19 (VT)	—	Ground

Are the resistances greater than 10,000 ohms?

Yes
GO to E8 .

No
REPAIR the affected circuit(s).

CYCLE the ignition. DRIVE the vehicle for at least 1 minute at speeds above 20 km/h (12 mph).

E8 CHECK THE ABS MODULE OUTPUT

NOTE: Make sure all test connections are made at the wheel speed sensor before the ignition is set to ON.

NOTE: Use a meter with a min/max feature and/or recording capabilities to obtain accurate measurements. The ABS module disables the voltage output immediately when the wheel speed sensor is not present.

Connect: ABS Module C135 .
Connect the meter to the suspect wheel speed sensor electrical connector pins, harness side.
Set the meter to measure DC voltage.
Set the meter range to greater than 15 volts.
Enable the min/max or recording feature.
Ignition ON.
Measure the voltage between:

Positive Lead		Negative Lead
Pin	Circuit	Pin	Circuit
LF Wheel Speed Sensor
C150-1	VCA03 (VT/WH)	—	Ground
RF Wheel Speed Sensor
C160-1	VCA05 (GY/VT)	—	Ground

Check the maximum recorded voltage on the meter.
Is the voltage between 10 and 16 volts?

Yes
INSTALL a new wheel speed sensor. REFER to Wheel Speed Sensor — Front in this section.

CYCLE the ignition. DRIVE the vehicle for at least 1 minute at speeds above 20 km/h (12 mph).

No
GO to E9 .

E9 CHECK FOR CORRECT ABS MODULE OPERATION

Inspect the ABS module electrical connector.
Repair:

corrosion (install new connector or terminal - clean module pins)
damaged or bent pins - install new terminals/pins
pushed-out pins - install new pins as necessary

Connect: ABS Module C135 .
Connect: Suspect Wheel Speed Sensor .
Make sure the connectors seat and latch correctly, then operate the system and determine if the concern is still present.
Is the concern still present?

Yes
CHECK for any applicable TSBs. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW the TSB instructions.

If no TSBs address this concern, INSTALL a new ABS module. REFER to Anti-Lock Brake System (ABS) Module in this section.

CYCLE the ignition. DRIVE the vehicle for at least 1 minute at speeds above 20 km/h (12 mph).

No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.

CYCLE the ignition. DRIVE the vehicle for at least 1 minute at speeds above 20 km/h (12 mph).

Pinpoint Test F: Wheel Speed Sensor Electrical Fault DTCs — Rear

Diagnostic Overview

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Section 100-00 for information about these practices.

Refer to Wiring Diagrams Cell 42 , Vehicle Dynamic Systems for schematic and connector information.

Normal Operation and Fault Conditions

Refer to Wheel Speed Sensor in Description and Operation in this section.

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Conditions
C0037:01	Left Rear Wheel Speed Sensor: General Electrical Failure	These DTCs set in continuous memory and on demand when there is a short to voltage, a short to ground or an open circuit on 1 or both of the wheel speed sensor circuits.
C003A:01	Right Rear Wheel Speed Sensor: General Electrical Failure
C0037:12	Left Rear Wheel Speed Sensor: Circuit Short to Battery	These DTCs set in continuous memory and on demand when the ABS module detects short to voltage on 1 or both of the wheel speed sensor circuits.
C003A:12	Right Rear Wheel Speed Sensor: Circuit Short to Battery
C0037:14	Left Rear Wheel Speed Sensor: Circuit Short to Ground or Open	These DTCs set in continuous memory and on demand when the ABS module detects short to ground or an open condition on 1 or both of the wheel speed sensor circuits.
C003A:14	Right Rear Wheel Speed Sensor: Circuit Short to Ground or Open
C0038:11	Left Rear Wheel Speed Sensor Supply: Circuit Short to Ground	These DTCs set in continuous memory and on demand when the ABS module detects short to ground or an open condition on the wheel speed sensor voltage supply circuit.
C003B:11	Right Rear Wheel Speed Sensor Supply: Circuit Short to Ground

Possible Sources

Wiring, terminals or connectors
Wheel speed sensors
ABS module

Visual Inspection and Diagnostic Pre-checks

Make sure the wheel speed sensor harness is routed correctly and is undamaged.

Make sure the wheel speed sensor electrical connector is free from any corrosion or other contaminants.

PINPOINT TEST F: WHEEL SPEED SENSOR ELECTRICAL FAULT DTCs — REAR

NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may cause damage to the connector.

Test Step

Result / Action to Take

F1 CHECK FOR FAULT REPEATABILITY

Ignition ON.
Using a scan tool, clear all ABS module DTCs.
Test drive the vehicle above 20 km/h (12 mph) for at least 1 minute.
Bring the vehicle to a safe stop.
Ignition OFF.
Ignition ON.
Enter the following diagnostic mode on the scan tool: Self Test — ABS Module .
Is the DTC still present?

Yes
If the vehicle is equipped with active park assist, GO to F4 . If the vehicle is not equipped with active park assist and the Rotunda ABS Active Wheel Speed Sensor Tester is not available, GO to F4 . If the vehicle is not equipped with active park assist and the Rotunda ABS Active Wheel Speed Sensor Tester is available, GO to F2 .

No
The system is operating correctly at this time. INSPECT both rear wheel speed sensor electrical connectors and the ABS module electrical connector. REPAIR or CLEAN the connector as necessary. ADDRESS the root cause of any connector or pin issues.

CYCLE the ignition. DRIVE the vehicle for at least 1 minute at speeds above 20 km/h (12 mph).

F2 CHECK THE ABS MODULE OUTPUT USING THE ROTUNDA ABS ACTIVE WHEEL SPEED SENSOR TESTER

Ignition OFF.
Disconnect: Suspect Wheel Speed Sensor .
Connect the Rotunda ABS Active Wheel Speed Sensor Tester to the wheel speed sensor connectors.
Ignition ON.
Select the correct system polarity on the Rotunda ABS Active Wheel Speed Sensor Tester and turn the power switch to the ON position.
Is the tester output LED illuminated?

Yes
GO to F3 .

No
GO to F5 .

F3 CHECK THE WHEEL SPEED SENSOR OUTPUT WITH THE ROTUNDA ABS ACTIVE WHEEL SPEED SENSOR TESTER

Raise the suspect wheel until it can spin freely. REFER to Lifting Points in Section 100-02 .
While monitoring the Rotunda ABS Active Wheel Speed Sensor Tester, slowly spin the suspect wheel.
Do the sensor output LEDs illuminate and flash and is the current overload LED not illuminated?

Yes
The system is operating correctly at this time. INSPECT all wheel speed sensor electrical connectors and the ABS module electrical connectors. REPAIR or CLEAN the connector as necessary. ADDRESS the root cause of any connector or pin issues.

CYCLE the ignition. DRIVE the vehicle for at least 1 minute at speeds above 20 km/h (12 mph).

No
INSTALL a new wheel speed sensor. REFER to Wheel Speed Sensor — Rear in this section.

CYCLE the ignition. DRIVE the vehicle for at least 1 minute at speeds above 20 km/h (12 mph).

F4 CHECK THE WHEEL SPEED SENSOR CIRCUITS FOR A SHORT TO BATTERY VOLTAGE

Ignition OFF.
Disconnect: ABS Module C135 .
Disconnect: Suspect Wheel Speed Sensor .
Ignition ON.
Measure the voltage between:

Positive Lead		Negative Lead
Pin	Circuit	Pin	Circuit
LR Wheel Speed Sensor
C3117-1	VCA04 (BU/OG)	—	Ground
C3117-2	RCA18 (BN/GN)	—	Ground
RR Wheel Speed Sensor
C3116-1	VCA06 (WH/OG)	—	Ground
C3116-2	RCA20 (BN)	—	Ground

Is any voltage present?

Yes
REPAIR the affected circuit(s).

CYCLE the ignition. DRIVE the vehicle for at least 1 minute at speeds above 20 km/h (12 mph).

No
GO to F5 .

F5 CHECK THE WHEEL SPEED SENSOR CIRCUITS FOR AN OPEN

Ignition OFF.
Measure the resistance between:

Positive Lead		Negative Lead
Pin	Circuit	Pin	Circuit
LR Wheel Speed Sensor
C135-31	VCA04 (BU/OG)	C3117-1	VCA04 (BU/OG)
C135-18	RCA18 (BN/GN)	C3117-2	RCA18 (BN/GN)
RR Wheel Speed Sensor
C135-17	VCA06 (WH/OG)	C3116-1	VCA06 (WH/OG)
C135-29	RCA20 (BN)	C3116-2	RCA20 (BN)

Are the resistances less than 3 ohms?

Yes
GO to F6 .

No
REPAIR the affected circuit(s).

CYCLE the ignition. DRIVE the vehicle for at least 1 minute at speeds above 20 km/h (12 mph).

F6 CHECK FOR SHORTED WHEEL SPEED SENSOR CIRCUITS

Measure the resistance between:

Positive Lead		Negative Lead
Pin	Circuit	Pin	Circuit
LR Wheel Speed Sensor
C3117-1	VCA04 (BU/OG)	C3117-2	RCA18 (BN/GN)
RR Wheel Speed Sensor
C3116-1	VCA06 (WH/OG)	C3116-2	RCA20 (BN)

Is the resistance greater 10,000 ohms?

Yes
GO to F7 .

No
REPAIR the affected circuit(s).

CYCLE the ignition. DRIVE the vehicle for at least 1 minute at speeds above 20 km/h (12 mph).

F7 CHECK THE WHEEL SPEED SENSOR CIRCUITS FOR A SHORT TO GROUND

Measure the resistance between:

Positive Lead		Negative Lead
Pin	Circuit	Pin	Circuit
LR Wheel Speed Sensor
C3117-1	VCA04 (BU/OG)	—	Ground
C3117-2	RCA18 (BN/GN)	—	Ground
RR Wheel Speed Sensor
C3116-1	VCA06 (WH/OG)	—	Ground
C3116-2	RCA20 (BN)	—	Ground

Are the resistances greater than 10,000 ohms?

Yes
GO to F8 .

No
REPAIR the affected circuit(s).

CYCLE the ignition. DRIVE the vehicle for at least 1 minute at speeds above 20 km/h (12 mph).

F8 CHECK THE ABS MODULE OUTPUT

NOTE: Make sure all test connections are made at the wheel speed sensor before the ignition is set to ON.

Connect: ABS Module C135 .
Connect the meter to the suspect wheel speed sensor electrical connector pins, harness side.
Set the meter to measure DC voltage.
Set the meter range to greater than 15 volts.
Enable the min/max or recording feature.
Ignition ON.
Measure the voltage between:

Positive Lead		Negative Lead
Pin	Circuit	Pin	Circuit
LR Wheel Speed Sensor
C3117-1	VCA04 (BU/OG)	—	Ground
RR Wheel Speed Sensor
C3116-1	VCA06 (WH/OG)	—	Ground

Check the maximum recorded voltage on the meter.
Is the voltage between 10 and 16 volts?

Yes
INSTALL a new wheel speed sensor. REFER to Wheel Speed Sensor — Rear in this section.

CYCLE the ignition. DRIVE the vehicle for at least 1 minute at speeds above 20 km/h (12 mph).

No
GO to F9 .

F9 CHECK FOR CORRECT ABS MODULE OPERATION

Inspect the ABS module electrical connector.
Repair:

corrosion (install new connector or terminal - clean module pins)
damaged or bent pins - install new terminals/pins
pushed-out pins - install new pins as necessary

Connect: ABS Module C135 .
Connect: Suspect Wheel Speed Sensor .
Make sure the connectors seat and latch correctly, then operate the system and determine if the concern is still present.
Is the concern still present?

Yes
CHECK for any applicable TSBs. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW the TSB instructions.

If no TSBs address this concern, INSTALL a new ABS module. REFER to Anti-Lock Brake System (ABS) Module in this section.

CYCLE the ignition. DRIVE the vehicle for at least 1 minute at speeds above 20 km/h (12 mph).

No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.

CYCLE the ignition. DRIVE the vehicle for at least 1 minute at speeds above 20 km/h (12 mph).

Pinpoint Test G: DTC C0040:64

Diagnostic Overview

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Section 100-00 for information about these practices.

Refer to Wiring Diagrams Cell 42 , Vehicle Dynamic Systems for schematic and connector information.

Normal Operation and Fault Conditions

The ABS module receives brake pedal switch input from the PCM over the HS-CAN . The ABS module compares this information against the pressure sensor in the HCU to determine if the brake pedal input is valid. A brake pedal switch that is incorrectly installed can cause a signal plausibility concern.

This DTC cannot be cleared using a scan tool. To clear this DTC, the root cause must first be identified and repaired. Then the ABS module must receive a valid brake pedal input from the PCM. This is accomplished by setting the ignition to ON and pressing and releasing the brake pedal at least twice.

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Conditions
C0040:64	Brake Pedal Switch A: Signal Plausibility Failure	This DTC sets in continuous memory if the ABS module cannot detect the brake pedal input or if the brake pedal input does not match information from other sensors (wheel speed signals, brake pressure transducer, etc.).

Possible Sources

Stoplamp/brake pedal switch
Communication concern
ABS module

Visual Inspection and Diagnostic Pre-checks

Make sure the stoplamp switch electrical connector is connected and free of corrosion and other contaminants.

Make sure the stoplamp switch is installed correctly.

Make sure the stoplamp switch is operating correctly.

PINPOINT TEST G: DTC C0040:64

Test Step	Result / Action to Take
G1 CHECK THE STOPLAMPS FOR CORRECT OPERATION
Inspect the brake pedal position switch and make sure it is installed correctly. Check the stoplamps for correct operation by pressing and releasing the brake pedal and observing the stoplamps. Do the stoplamps operate correctly?	Yes GO to G2 . No REFER to Section 417-01 to diagnose the stoplamps.
G2 CHECK THE ABS MODULE DTCS
Ignition ON. Enter the following diagnostic mode on the scan tool: Self Test — ABS Module . Are any communication (U-code) DTCs present?	Yes ADDRESS all communication DTCs prior to diagnosing DTC U0040:64. REFER to the ABS Module DTC Chart in this section. No GO to G3 .
G3 CHECK THE PCM FOR DTCS
Enter the following diagnostic mode on the scan tool: Self Test — PCM KOEO . Are any DTCs present in the PCM?	Yes REFER to Section 303-14 . No GO to G4 .
G4 CHECK FOR CORRECT ABS MODULE OPERATION
Ignition OFF. Disconnect and inspect the ABS Module electrical connector. Repair: corrosion (install new connector or terminal - clean module pins) damaged or bent pins - install new terminals/pins pushed-out pins - install new pins as necessary Connect: ABS Module C135 . Make sure the connector seats and latches correctly, then operate the system and determine if the concern is still present. Is the concern still present?	Yes CHECK OASIS for any applicable TSBs. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW the TSB instructions. If no TSBs address this concern, INSTALL a new ABS module. REFER to Anti-Lock Brake System (ABS) Module in this section. SET the ignition to ON. PRESS and RELEASE the brake pedal twice (required to clear the DTC). No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues. SET the ignition to ON. PRESS and RELEASE the brake pedal twice (required to clear the DTC).

Pinpoint Test H: Stability Control Sensor Signal Failure DTCs

Diagnostic Overview

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Section 100-00 for information about these practices.

Refer to Wiring Diagrams Cell 42 , Vehicle Dynamic Systems for schematic and connector information.

Normal Operation and Fault Conditions

The RCM measures vehicle yaw rate, lateral acceleration and longitudinal acceleration and sends the information to the ABS module over a private HS-CAN . This private HS-CAN is used only for communication between the RCM and the ABS module. The yaw rate sensor, lateral and longitudinal accelerometers are contained in the RCM .

A circuit fault such as a short or an open disrupts communication between the modules and the ABS module sets a DTC. An incorrectly installed RCM sends invalid information to the ABS module, which sets a DTC.

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Conditions
C0061:22	Lateral Acceleration Sensor: Signal Amplitude > Maximum	These DTCs set in continuous memory if the stability control sensor information sent by the RCM is outside a calculated or predetermined range.
C0061:64	Lateral Acceleration Sensor: Signal Plausibility Failure
C0062:22	Longitudinal Acceleration Sensor: Signal Amplitude > Maximum
C0062:23	Longitudinal Acceleration Sensor: Signal Stuck Low
C0062:64	Longitudinal Acceleration Sensor: Signal Plausibility Failure
C0063:22	Yaw Rate Sensor: Signal Amplitude > Maximum
C0062:64	Yaw Rate Sensor: Signal Plausibility Failure
U0074:88	Control Module Communication Bus B Off: Bus Off	This DTC sets in continuous memory if the communication bus between the ABS module and the RCM is shorted, open or has excessive resistance.

Possible Sources

Wiring, terminals or connectors
RCM
ABS module

PINPOINT TEST H: STABILITY CONTROL SENSOR SIGNAL FAILURE DTCS

NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may cause damage to the connector.

Test Step

Result / Action to Take

H1 CHECK FOR A HS-CAN CONCERN WITH THE RCM

Ignition ON.
NOTE: The network test does not test the private HS-CAN between the ABS module and RCM .
Using a scan tool, carry out the network test.
Does the RCM pass the network test?

Yes
GO to H2 .

No
REFER to Section 418-01 to diagnose the does not respond to the scan tool.

H2 CHECK THE RCM FOR DTCS

Enter the following diagnostic mode on the scan tool: Self Test — RCM .
Are any DTCs present in the RCM ?

Yes
DIAGNOSE all DTCs before diagnosing the ABS module. REFER to Section 501-20B .

No
GO to H3 .

H3 CHECK FOR ABS MODULE DTC U0151:00

Enter the following diagnostic mode on the scan tool: Self Test — ABS Module .
Is DTC U0151:00 present?

Yes
GO to Pinpoint Test N .

No
GO to H4 .

H4 VERIFY THE RCM PART NUMBER

Using a scan tool, retrieve and record the RCM part number.
Check the part number recorded against the number listed in the parts catalog.
Does the part number in the RCM match the part number listed in the parts catalog?

Yes
GO to H5 .

No
INSTALL the correct . REFER to Section 501-20B .

H5 CHECK THE PRIVATE HS-CAN CIRCUITS FOR A SHORT TO VOLTAGE

Depower the SRS . Refer Section 501-20B .
Disconnect: RCM C310B .
Disconnect: ABS Module C135 .
Repower the SRS. Do not prove out the SRS at this time. Refer Section 501-20B .
Ignition ON.
Measure the voltage between:

Positive Lead		Negative Lead
Pin	Circuit	Pin	Circuit
C135-20	VCA24 (GN/OG)	—	Ground
C135-33	VCA23 (BU/WH)	—	Ground

Is any voltage present?

Yes
REPAIR the affected circuit(s).

No
GO to H6 .

H6 CHECK THE PRIVATE HS-CAN CIRCUITS FOR A SHORT TO GROUND

Ignition OFF.
Measure the resistance between:

Positive Lead		Negative Lead
Pin	Circuit	Pin	Circuit
C135-20	VCA24 (GN/OG)	—	Ground
C135-33	VCA23 (BU/WH)	—	Ground

Are the resistances greater than 10,000 ohms?

Yes
GO to H7 .

No
REPAIR the affected circuit(s).

H7 CHECK THE PRIVATE HS-CAN CIRCUITS FOR A SHORT TOGETHER

Measure the resistance between:

Positive Lead		Negative Lead
Pin	Circuit	Pin	Circuit
C135-20	VCA24 (GN/OG)	C135-33	VCA23 (BU/WH)

Is the resistance greater than 10,000 ohms?

Yes
GO to H8 .

No
REPAIR the affected circuit(s).

H8 CHECK THE PRIVATE HS-CAN CIRCUITS FOR AN OPEN

Measure the resistance between:

Positive Lead		Negative Lead
Pin	Circuit	Pin	Circuit
C310B-19	VCA24 (GN/OG)	C135-20	VCA24 (GN/OG)
C310B-20	VCA23 (BU/WH)	C135-33	VCA23 (BU/WH)

Are the resistances less than 3 ohms?

Yes
GO to H9 .

No
REPAIR the affected circuit(s).

H9 CHECK FOR CORRECT RCM OPERATION

Ignition OFF.
Disconnect and inspect the RCM electrical connectors.
Repair:

corrosion (install new connector or terminal - clean module pins)
damaged or bent pins - install new terminals/pins
pushed-out pins - install new pins as necessary

Connect: RCM C310B .
Connect: ABS Module C135 .
Make sure the connectors seat and latch correctly, then operate the system and determine if the concern is still present.
Is the concern still present?

Yes
CHECK for any applicable TSBs. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW the TSB instructions. If no TSBs address this concern, INSTALL a new . REFER to Section 501-20B .

CLEAR the DTC. REPEAT the ABS module self-test. If one or more of the DTCs listed in the DTC Fault Trigger Conditions table returns, GO to H10 .

No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.

H10 CHECK FOR CORRECT ABS MODULE OPERATION

Ignition OFF.
Disconnect and inspect the ABS module electrical connector.
Repair:

corrosion (install new connector or terminal - clean module pins)
damaged or bent pins - install new terminals/pins
pushed-out pins - install new pins as necessary

Connect: ABS Module C135 .
Make sure the connector seats and latches correctly, then operate the system and determine if the concern is still present.
Is the concern still present?

Yes
CHECK for any applicable TSBs. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW the TSB instructions.

If no TSBs address this concern, INSTALL a new ABS module. REFER to Anti-Lock Brake System (ABS) Module in this section.

No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.

Pinpoint Test I: DTCs C101A:15, C101A:16 and C101A:29

Diagnostic Overview

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Section 100-00 for information about these practices.

Refer to Wiring Diagrams Cell 42 , Vehicle Dynamic Systems for schematic and connector information.

Normal Operation and Fault Conditions

The brake booster vacuum pressure sensor receives a sensor supply voltage of 5 volts from the ABS module. The sensor is also grounded through the ABS module. The sensor uses the pressure differential between the atmosphere and the brake booster vacuum chamber to produce a return voltage signal to the ABS module that is between 0.2 volt and 4.9 volts. The ABS module uses other sensor inputs such as wheel speed, brake pedal and stability sensors to determine if the vehicle is stopping and at what rate of deceleration. This information is compared against the vacuum pressure sensor to determine the validity of the sensor signal and the working condition of the sensor itself. A vacuum leak, a circuit failure in the sensor wiring, a brake booster with a mechanical failure or an internal failure of the vacuum sensor or ABS module results in a DTC being set in the ABS module.

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Conditions
C101A:15	Vacuum Pressure Sensor: Circuit Shorted to Battery or Open	This DTC sets in continuous memory and on-demand if the ABS module detects a short to voltage or an open on any 1 of the 3 brake booster vacuum sensor circuits.
C101A:16	Vacuum Pressure Sensor: Circuit Voltage Below Threshold	This DTC sets in continuous memory and on-demand if the voltage supplied to the brake booster vacuum sensor falls below a predetermined threshold.
C101A:29	Vacuum Pressure Sensor: Signal Invalid	This DTC sets in continuous memory if the signal sent from the brake booster vacuum sensor does not match data from other sensors.

Possible Sources

Vacuum leak
Wiring, terminals or connectors
Vacuum sensor
Brake booster
ABS module

Visual Inspection and Diagnostic Pre-checks

Inspect the brake booster for vacuum leaks.

Inspect the brake booster for any obvious signs of damage.

Inspect the brake booster vacuum sensor harness and connector of any obvious signs of damage.

Make sure the brake booster vacuum sensor electrical connector is free from any corrosion or other contaminants.

PINPOINT TEST I: DTCS C101A:15, C101A:16 AND C101A:29

NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may cause damage to the connector.

Test Step

Result / Action to Take

I1 CHECK THE DTCS FROM THE ABS MODULE

Ignition ON.
Enter the following diagnostic mode on the scan tool: Self Test — ABS Module .
Is DTC U3003:16 or U3003:17 present?

Yes
For DTC U3003:16, GO to Pinpoint Test A . For DTC U3003:17, GO to Pinpoint Test B .

No
GO to I2 .

I2 CHECK THE BRAKE BOOSTER AND VACUUM HOSES FOR LEAKS

Inspect the vacuum hoses, brake booster and brake booster seals for leaks or evidence of leaks.
Are any leaks or evidence of leaks found?

Yes
REPAIR or INSTALL new components as necessary.

No
GO to I3 .

I3 CHECK THE ABS MODULE OUTPUT

Ignition OFF.
Disconnect: Brake Booster Vacuum Sensor C149 .
Ignition ON.
Measure the voltage between:

Positive Lead		Negative Lead
Pin	Circuit	Pin	Circuit
C149-1	VCA36 (YE/GN)	—	Ground

Is the voltage equal to or greater than 4.8 volts?

Yes
GO to I4 .

No
REPAIR the affected circuit for excessive resistance. CLEAR the DTC. REPEAT the self-test.

If the DTC returns, INSTALL a new ABS module. REFER to Anti-Lock Brake System (ABS) Module in this section.

I4 CHECK THE VACUUM SENSOR WIRING FOR A SHORT TO VOLTAGE

Ignition OFF.
Disconnect: ABS Module C135 .
Ignition ON.
Measure the voltage between:

Positive Lead		Negative Lead
Pin	Circuit	Pin	Circuit
C149-1	VCA36 (YE/GN)	—	Ground
C149-2	RCA36 (GE/OG)	—	Ground
C149-3	LCA37 (YE/OG)	—	Ground

Is any voltage present?

Yes
REPAIR the affected circuit(s).

No
GO to I5 .

I5 CHECK THE VACUUM SENSOR WIRING FOR A SHORT TO GROUND

Ignition OFF.
Measure the resistance between:

Positive Lead		Negative Lead
Pin	Circuit	Pin	Circuit
C149-1	VCA36 (YE/GN)	—	Ground
C149-2	RCA36 (GE/OG)	—	Ground
C149-3	LCA37 (YE/OG)	—	Ground

Are the resistances greater than 10,000 ohms?

Yes
GO to I6 .

No
REPAIR the circuit.

I6 CHECK THE VACUUM SENSOR WIRING FOR AN OPEN

Measure the resistance between:

Positive Lead		Negative Lead
Pin	Circuit	Pin	Circuit
C135-5	VCA36 (YE/GN)	C149-1	VCA36 (YE/GN)
C135-10	RCA36 (GE/OG)	C149-2	RCA36 (GE/OG)
C135-37	LCA37 (YE/OG)	C149-3	LCA37 (YE/OG)

Are the resistances less than 3 ohms?

Yes
GO to I7 .

No
REPAIR the affected circuit(s).

I7 CHECK THE VACUUM SENSOR WIRING FOR A SHORT TOGETHER

Measure the resistance between:

Positive Lead		Negative Lead
Pin	Circuit	Pin	Circuit
C149-1	VCA36 (YE/GN)	C149-2	RCA36 (GE/OG)
C149-1	VCA36 (YE/GN)	C149-3	LCA37 (YE/OG)
C149-2	RCA36 (GE/OG)	C149-3	LCA37 (YE/OG)

Are the resistances greater than 10,000 ohms?

Yes
INSTALL a new brake booster vacuum sensor. Section 206-07 . DRIVE the vehicle at speeds greater than 10 km/h (6 mph) for at least 4 minutes and CARRY OUT at least 3 stops.

REPEAT the ABS module self-test. If DTC C101A:15, 16 or 29 returns, GO to I8 .

No
REPAIR the affected circuit(s).

I8 CHECK FOR CORRECT ABS MODULE OPERATION

Ignition OFF.
Disconnect and inspect the ABS module electrical connector.
Repair:

corrosion (install new connector or terminal - clean module pins)
damaged or bent pins - install new terminals/pins
pushed-out pins - install new pins as necessary

Connect: ABS Module C135 .
Make sure the connector seats and latches correctly, then operate the system and determine if the concern is still present.
Is the concern still present?

Yes
CHECK for any applicable TSBs. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW the TSB instructions.

If no TSBs address this concern, INSTALL a new ABS module. REFER to Anti-Lock Brake System (ABS) Module in this section.

No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.

Pinpoint Test J: DTC U0100:00

Diagnostic Overview

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Section 100-00 for information about these practices.

Refer to Wiring Diagrams Cell 42 , Vehicle Dynamic Systems for schematic and connector information.

Normal Operation and Fault Conditions

With the ignition ON, the PCM sends messages to the ABS module over the HS-CAN . If the ABS module does not receive these messages within a certain time frame (less than 1 second), the ABS module sets DTCs. For information on the messages sent to the ABS module by the PCM, refer to the Network Message Chart in this section.

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Conditions
U0100:00	Lost Communication With ECM /PCM: No Sub Type Information	This DTC sets in continuous memory if any one of the following messages is missing: brake pedal position, engine status, throttle position or cruise control status.

Possible Sources

Network communication concern
PCM
ABS module

PINPOINT TEST J: DTC U0100:00

Test Step	Result / Action to Take
J1 CHECK THE COMMUNICATION NETWORK
Ignition ON. Using a scan tool, carry out the network test. Does the PCM pass the network test?	Yes GO to J2 . No REFER to Section 418-01 to diagnose the PCM does not respond to the scan tool.
J2 CHECK THE ABS CMDTCs
Ignition ON. Enter the following diagnostic mode on the scan tool: Self Test — ABS Module . Clear the DTCs. Ignition OFF. Ignition ON. Enter the following diagnostic mode on the scan tool: Self Test — ABS Module . Record the ABS module DTCs. Is DTC U0100:00 retrieved again?	Yes GO to J3 . No The system is operating correctly at this time. The DTC may have been set due to high network traffic or an intermittent fault condition.
J3 REVIEW THE RECORDED DTCS FROM THE ABS MODULE SELF-TEST
Check the recorded DTCs from the ABS module self-test. Is DTC U3003:16 or U3003:17 present?	Yes For DTC U3003:16, GO to Pinpoint Test A . For DTC U3003:17, GO to Pinpoint Test B . No GO to J4 .
J4 CHECK FOR DTCS IN THE PCM
Enter the following diagnostic mode on the scan tool: Self Test — PCM KOEO . Is DTC P0562 or P0563 present?	Yes REFER to Section 303-14 . No GO to J5 .
J5 CHECK FOR DTC U0100:00 SET IN OTHER MODULES
Ignition ON. Enter the following diagnostic mode on the scan tool: Self Test — All CMDTCs . Is DTC U0100:00 set in 1 or more modules in addition to the ABS module?	Yes CHECK OASIS for any applicable TSBs. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW the TSB instructions. If no TSBs address this concern, INSTALL a new PCM. REFER to Section 303-14 . No CHECK OASIS for any applicable TSBs. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW the TSB instructions. If no TSBs address this concern, INSTALL a new ABS module. REFER to Anti-Lock Brake System (ABS) Module in this section.

Pinpoint Test K: DTC U0104:00

Diagnostic Overview

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Section 100-00 for information about these practices.

Refer to Wiring Diagrams Cell 42 , Vehicle Dynamic Systems for schematic and connector information.

Normal Operation and Fault Conditions

With the ignition ON, the C-CM sends the ABS module messages over the HS-CAN . If the ABS module does not receive these messages within a certain time frame (less than 1 second), the ABS module sets DTCs. For information on the messages sent to the ABS module from the C-CM , refer to the Network Message Chart in this section.

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Conditions
U0104:00	Lost Communication With C-CM : No Sub Type Information	This DTC sets in continuous memory if any one of the following collision warning messages is missing: deceleration information, deceleration request or brake system precharge request.

Possible Sources

Network communication concern
C-CM
ABS module

PINPOINT TEST K: DTC U0104:00

Test Step	Result / Action to Take
K1 CHECK THE COMMUNICATION NETWORK
Ignition ON. Using a scan tool, carry out the network test. Does the C-CM pass the network test?	Yes GO to K2 . No REFER to Section 418-01 to diagnose the C-CM does not respond to the scan tool.
K2 CHECK THE ABS CMDTCs
Ignition ON. Enter the following diagnostic mode on the scan tool: Self Test — ABS Module . Clear the DTCs. Ignition OFF. Ignition ON. Enter the following diagnostic mode on the scan tool: Self Test — ABS Module . Record the ABS module DTCs. Is DTC U0104:00 retrieved again?	Yes GO to K3 . No The system is operating correctly at this time. The DTC may have been set due to high network traffic or an intermittent fault condition.
K3 REVIEW THE RECORDED DTCS FROM THE ABS SELF-TEST
Check the recorded DTCs from the ABS self-test. Is DTC U3003:16 or U3003:17 present?	Yes For DTC U3003:16, GO to Pinpoint Test A . For DTC U3003:17, GO to Pinpoint Test B . No GO to K4 .
K4 CHECK FOR DTCS IN THE C-CM
Enter the following diagnostic mode on the scan tool: Self Test — C-CM . Is DTC U3003:16 or U3003:17 present?	Yes For vehicles equipped with non-adaptive cruise control, REFER to Section 419-03A . For vehicles equipped with adaptive cruise control, REFER to Section 419-03B . No GO to K5 .
K5 CHECK FOR DTC U0104:00 SET IN OTHER MODULES
Ignition ON. Enter the following diagnostic mode on the scan tool: Self Test — All CMDTCs . Is DTC U0104:00 set in 1 or more modules in addition to the ABS module?	Yes CHECK OASIS for any applicable TSBs. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW the TSB instructions. If no TSBs address this concern, INSTALL a new C-CM . For vehicles equipped with non-adaptive cruise control, REFER to Section 419-03A . For vehicles equipped with adaptive cruise control, REFER to Section 419-03B . No CHECK OASIS for any applicable TSBs. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW the TSB instructions. If no TSBs address this concern, INSTALL a new ABS module. REFER to Anti-Lock Brake System (ABS) Module in this section.

Pinpoint Test L: DTC U0131:00

Diagnostic Overview

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Section 100-00 for information about these practices.

Refer to Wiring Diagrams Cell 42 , Vehicle Dynamic Systems for schematic and connector information.

Normal Operation and Fault Conditions

On vehicles not equipped with active park assist, with the ignition ON, the PSCM sends messages to the ABS module over the HS-CAN .

On vehicles equipped with active park assist, with the ignition ON, the SCCM sends messages to the ABS module over the HS-CAN .

If the ABS module does not receive these messages within a certain time frame (less than 1 second), the ABS module sets DTCs. For information on the messages sent to the ABS module from the PSCM and SCCM , refer to the Network Message Chart in this section.

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Conditions
U0131:00	Lost Communication With PSCM : No Sub Type Information	On vehicles not equipped with active park assist, this DTC sets in continuous memory if any one of the following PSCM messages is missing; steering wheel angle and steering wheel rotation count. On vehicles equipped with active park assist, this DTC sets in continuous memory if any one of the following SCCM messages is missing; steering wheel angle and steering wheel rotation count.

Possible Sources

Network communication concern
PSCM (vehicles without active park assist)
SCCM (vehicles with active park assist)
ABS module

PINPOINT TEST L: DTC U0131:00

Test Step	Result / Action to Take
L1 CHECK THE COMMUNICATION NETWORK
Ignition ON. Using a scan tool, carry out the network test. Does the PSCM (vehicles without active park assist) or the SCCM (vehicles with active park assist) pass the network test?	Yes GO to L2 . No For vehicles not equipped with active park assist, REFER to Section 418-01 to diagnose the PSCM does not respond to the scan tool. For vehicles equipped with active park assist, REFER to Section 418-01 to diagnose the SCCM does not respond to the scan tool.
L2 CHECK THE ABS CMDTCs
Ignition ON. Enter the following diagnostic mode on the scan tool: Self Test — ABS Module . Clear the DTCs. Ignition OFF. Ignition ON. Enter the following diagnostic mode on the scan tool: Self Test — ABS Module . Record the ABS module DTCs. Is DTC U0131:00 retrieved again?	Yes GO to L3 . No The system is operating correctly at this time. The DTC may have been set due to high network traffic or an intermittent fault condition.
L3 REVIEW THE RECORDED DTCS FROM THE ABS SELF-TEST
Check the recorded DTCs from the ABS self-test. Is DTC U3003:16 or U3003:17 present?	Yes For DTC U3003:16, GO to Pinpoint Test A . For DTC U3003:17, GO to Pinpoint Test B . No For vehicles not equipped with active park assist, GO to L4 . For vehicles equipped with active park assist, GO to L5 .
L4 CHECK FOR DTCS IN THE PSCM
Enter the following diagnostic mode on the scan tool: Self Test — PSCM . Is DTC U3003:16 or U3003:17 present?	Yes REFER to Section 211-00 . No GO to L6 .
L5 CHECK FOR DTCS IN THE SCCM
Enter the following diagnostic mode on the scan tool: Self Test — SCCM . Is DTC C0051:16 or C0051:17 present?	Yes REFER to Section 211-05 . No GO to L6 .
L6 CHECK FOR DTC U0131:00 SET IN OTHER MODULES
Ignition ON. Enter the following diagnostic mode on the scan tool: Self Test — All CMDTCs . Is DTC U0131:00 set in 1 or more modules in addition to the ABS module?	Yes CHECK OASIS for any applicable TSBs. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW the TSB instructions. If no TSBs address this concern and the vehicle is not equipped with active park assist, INSTALL a new steering gear (the PSCM is part of the steering gear). REFER to Section 211-02 . If no TSBs address this concern and the vehicle is equipped with active park assist, INSTALL a new SCCM . REFER to Section 211-05 . No CHECK OASIS for any applicable TSBs. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW the TSB instructions. If no TSBs address this concern, INSTALL a new ABS module. REFER to Anti-Lock Brake System (ABS) Module in this section.

Pinpoint Test M: DTC U0140:00

Diagnostic Overview

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Section 100-00 for information about these practices.

Refer to Wiring Diagrams Cell 42 , Vehicle Dynamic Systems for schematic and connector information.

Normal Operation and Fault Conditions

With the ignition ON, the BCM sends the ABS module messages over the HS-CAN . If the ABS module does not receive these messages within a certain time frame (less than 1 second), the ABS module sets DTCs. For information on the messages sent to the ABS module by the BCM , refer to the Network Message Chart in this section.

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Conditions
U0140:00	Lost Communication With BCM : No Sub Type Information	This DTC sets in continuous memory and on-demand if any one of the following messages is missing; ignition status, engine off status, collision warning system status, adaptive cruise control status or vehicle configuration information.

Possible Sources

Network communication concern
BCM
ABS module

PINPOINT TEST M: DTC U0140:00

Test Step	Result / Action to Take
M1 CHECK THE COMMUNICATION NETWORK
Ignition ON. Using a scan tool, carry out the network test. Does the BCM pass the network test?	Yes GO to M2 . No REFER to Section 418-01 , the BCM does not respond to the scan tool.
M2 CHECK THE ABS MODULE CMDTCs
Enter the following diagnostic mode on the scan tool: Self Test — ABS Module . Clear the DTCs. Ignition OFF. Ignition ON. Repeat the ABS module self-test. Record the ABS module DTCs. Is DTC U0140:00 retrieved again?	Yes GO to M3 . No The system is operating correctly at this time. The DTC may have been set due to high network traffic or an intermittent fault condition.
M3 REVIEW THE RECORDED DTCS FROM THE ABS MODULE SELF-TEST
Check the recorded DTCs from the ABS module self-test. Is DTC U3003:16 or U3003:17 present?	Yes For DTC U3003:16, GO to Pinpoint Test A . For DTC U3003:17, GO to Pinpoint Test B . No GO to M4 .
M4 CHECK FOR DTCS IN THE BCM
Enter the following diagnostic mode on the scan tool: Self Test — RCM . Is DTC U3003:16 or U3003:17 present?	Yes REFER to Section 419-10 . No GO to M5 .
M5 CHECK FOR DTC U0140:00 SET IN OTHER MODULES
Enter the following diagnostic mode on the scan tool: Self Test — All CMDTCs . Retrieve and record the CMDTCs from all modules. Is DTC U0140:00 set in 1 or more modules in addition to the ABS module?	Yes CHECK OASIS for any applicable TSBs. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no TSBs address this concern, INSTALL a new BCM . REFER to Section 419-10 . No CHECK OASIS for any applicable TSBs. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no TSBs address this concern, INSTALL a new ABS module. REFER to Anti-Lock Brake System (ABS) Module in this section.

Pinpoint Test N: DTC U0151:00

Diagnostic Overview

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Section 100-00 for information about these practices.

Refer to Wiring Diagrams Cell 42 , Vehicle Dynamic Systems for schematic and connector information.

Normal Operation and Fault Conditions

With the ignition ON, the RCM sends the ABS module messages over a private HS-CAN . If the ABS module does not receive these messages within a certain time frame (less than 1 second), the ABS module sets DTCs.

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Conditions
U0151:00	Lost Communication With RCM : No Sub Type Information	This DTC sets in continuous memory if any one of the following messages is missing; yaw rate, lateral acceleration, longitudinal acceleration or roll rate.

Possible Sources

Network communication concern
RCM
ABS module

PINPOINT TEST N: DTC U0151:00

Test Step	Result / Action to Take
N1 CHECK THE COMMUNICATION NETWORK
Ignition ON. Using a scan tool, carry out the network test. Does the RCM pass the network test?	Yes GO to N2 . No REFER to Section 418-01 , the RCM does not respond to the scan tool.
N2 CHECK THE ABS MODULE CMDTCs
Enter the following diagnostic mode on the scan tool: Self Test — ABS Module . Clear the DTCs. Ignition OFF. Ignition ON. Repeat the ABS module self-test. Record the ABS module DTCs. Is DTC U0151:00 retrieved again?	Yes GO to N3 . No The system is operating correctly at this time. The DTC may have been set due to high network traffic or an intermittent fault condition.
N3 REVIEW THE RECORDED DTCS FROM THE ABS MODULE SELF-TEST
Check the recorded DTCs from the ABS module self-test. Is DTC U3003:16 or U3003:17 present?	Yes For DTC U3003:16, GO to Pinpoint Test A . For DTC U3003:17, GO to Pinpoint Test B . No GO to N4 .
N4 CHECK FOR DTCS IN THE RCM
Enter the following diagnostic mode on the scan tool: Self Test — RCM . Is DTC U3003:16 or U3003:17 present?	Yes REFER to Section 501-20B . No GO to N5 .
N5 CHECK FOR DTC U0151:00 SET IN OTHER MODULES
Enter the following diagnostic mode on the scan tool: Self Test — All CMDTCs . Retrieve and record the CMDTCs from all modules. Is DTC U0151:00 set in 1 or more modules in addition to the ABS module?	Yes CHECK OASIS for any applicable TSBs. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no TSBs address this concern, INSTALL a new RCM . REFER to Section 501-20B . No CHECK OASIS for any applicable TSBs. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no TSBs address this concern, INSTALL a new ABS module. REFER to Anti-Lock Brake System (ABS) Module in this section.

Pinpoint Test O: DTC U0155:00

Diagnostic Overview

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Section 100-00 for information about these practices.

Refer to Wiring Diagrams Cell 42 , Vehicle Dynamic Systems for schematic and connector information.

Normal Operation and Fault Conditions

With the ignition ON, the IPC sends the ABS module messages over the HS-CAN . If the ABS module does not receive these messages within a certain time frame (less than 1 second), the ABS module sets DTCs.

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Conditions
U0155:00	Lost Communication With IPC : No Sub Type Information	This DTC sets in continuous memory if the traction control status message is missing.

Possible Sources

Network communication concern
IPC
ABS module

PINPOINT TEST O: DTC U0155:00

Test Step	Result / Action to Take
O1 CHECK THE COMMUNICATION NETWORK
Ignition ON. Using a scan tool, carry out the network test. Does the IPC pass the network test?	Yes GO to O2 . No REFER to Section 418-01 to diagnose the IPC does not respond to the scan tool.
O2 CHECK THE ABS MODULE CMDTCs
Ignition ON. Enter the following diagnostic mode on the scan tool: Self Test — ABS Module . Clear the DTCs. Ignition OFF. Ignition ON. Enter the following diagnostic mode on the scan tool: Self Test — ABS Module . Record the ABS module DTCs. Is DTC U0155:00 retrieved again?	Yes GO to O3 . No The system is operating correctly at this time. The DTC may have been set due to high network traffic or an intermittent fault condition.
O3 REVIEW THE RECORDED DTCS FROM THE ABS MODULE SELF-TEST
Check the recorded DTCs from the ABS module self-test. Is DTC U3003:16 or U3003:17 present?	Yes For DTC U3003:16, GO to Pinpoint Test A . For DTC U3003:17, GO to Pinpoint Test B . No GO to O4 .
O4 CHECK FOR DTCS IN THE IPC
Enter the following diagnostic mode on the scan tool: Self Test — IPC . Is DTC U3003:16 or U3003:17 present?	Yes REFER to Section 413-01 . No GO to O5 .
O5 CHECK FOR DTC U0155:00 SET IN OTHER MODULES
Ignition ON. Enter the following diagnostic mode on the scan tool: Self Test — All CMDTCs . Is DTC U0155:00 set in 1 or more modules in addition to the ABS module?	Yes CHECK OASIS for any applicable TSBs. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW the TSB instructions. If no TSBs address this concern, INSTALL a new IPC . REFER to Section 413-01 . No CHECK OASIS for any applicable TSBs. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW the TSB instructions. If no TSBs address this concern, INSTALL a new ABS module. REFER to Anti-Lock Brake System (ABS) Module in this section.

Pinpoint Test P: DTC U3002:62

Diagnostic Overview

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Section 100-00 for information about these practices.

Refer to Wiring Diagrams Cell 42 , Vehicle Dynamic Systems for schematic and connector information.

Normal Operation and Fault Conditions

Diagnose any network communication DTCs prior to diagnosing U3002:62.

With the ignition ON, the ABS module and the PCM share the VIN information over the HS-CAN . If the ABS module does not receive these messages within a certain time frame (less than 1 second), the ABS module sets DTCs.

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Conditions
U3002:62	Vehicle Identification Number: Signal Compare Failure	This DTC sets in continuous memory if the VIN message sent by the PCM over the HS-CAN does not match the VIN stored in the ABS module.

Possible Sources

Module configuration (ABS and/or PCM)
ABS module

PINPOINT TEST P: DTC U3002:62

Test Step	Result / Action to Take
P1 VERIFY THE PCM VIN
Ignition ON. Using a scan tool, view the VIN in the PCM. Compare the VIN in the PCM to the VIN plate on the vehicle. Does VIN in the PCM match the VIN plate on the vehicle?	Yes GO to P2 . No RECONFIGURE the PCM using As-Built data. FOLLOW the instructions on the scan tool.
P2 VERIFY THE ABS MODULE PART NUMBER
Using a scan tool, retrieve and record the ABS module part number from the log viewer. Check the part number recorded against the number listed in the parts catalog. Is the correct ABS module installed in the vehicle?	Yes RECONFIGURE the ABS module using As-Built data. FOLLOW the instructions on the scan tool. CYCLE the ignition, REPEAT the ABS module self-test. If the DTC returns, INSTALL a new ABS module. REFER to Anti-Lock Brake System (ABS) Module in this section. RECONFIGURE the ABS module using As-Built data. No INSTALL a new ABS module. REFER to Anti-Lock Brake System (ABS) Module in this section. RECONFIGURE the ABS module using As-Built data.

Pinpoint Test Q: The Stability/Traction Control System is Inoperative or Cannot Be Disabled

Diagnostic Overview

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Section 100-00 for information about these practices.

Refer to Wiring Diagrams Cell 60 , Instrument Cluster for schematic and connector information.

Normal Operation and Fault Conditions

Traction control system status is relayed to the driver by the sliding car OFF icon in the IPC . When the driver deactivates the traction control, the IPC sends a message to the ABS module over the HS-CAN . The ABS module deactivates the traction control system and sends a message back to the IPC to illuminate the sliding car OFF icon. The traction control system remains deactivated until the driver changes the traction control state in the message center or until the ignition switch is cycled.

Possible Sources

Network communication concern
IPC concern
Message center concern

PINPOINT TEST Q: THE STABILITY/TRACTION CONTROL SYSTEM IS INOPERATIVE OR CANNOT BE DISABLED

Test Step	Result / Action to Take
Q1 CHECK FOR IPC DTCS
Ignition ON. Enter the following diagnostic mode on the scan tool: Self Test — IPC . Are any DTCs present in the IPC ?	Yes REFER to Section 413-01 . No GO to Q2 .
Q2 CHECK THE MESSAGE CENTER TRACTION CONTROL SELECTION
Using the message center buttons, configure the traction control on and then off again. Refer to the Owner's Literature. Does the TRACTION CONTROL selection change when configured to on and off?	Yes GO to Q3 . No REFER to Section 413-01 to diagnose the message center is not operating correctly.
Q3 CHECK THE STABILITY/TRACTION CONTROL DISABLED INDICATOR (SLIDING CAR OFF ICON)
Using the message center buttons, configure the traction control on and then off again. Refer to the Owner's Literature. Does the sliding car OFF icon illuminate when the traction control is turned off?	Yes The system is operating correctly at this time. The concern may have been set due to high network traffic or an intermittent fault condition. No REFER to Section 413-01 to diagnose the stability/traction control disabled indicator (sliding car OFF icon).

Pinpoint Test R: DTCs C0051:23, 27, 29, 54 and 64

Diagnostic Overview

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Section 100-00 for information about these practices.

Normal Operation and Fault Conditions

The ABS module uses the steering wheel position sensor in conjunction with the RCM sensor information to determine vehicle direction of travel. For vehicles not equipped with active park assist, the ABS module receives the steering wheel position information from the PSCM over the HS-CAN . For vehicles equipped with active park assist, the ABS module receives the steering wheel position information from the SCCM over the HS-CAN .

The ABS module continually compares the steering wheel position information received against other sensor information to determine the validity of the information received. An internal failure of the steering wheel position sensor, RCM , PSCM , SCCM or a vehicle communication concern causes the ABS module to set 1 or more DTCs.

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Conditions
C0051:23	Steering Wheel Position Sensor: Signal Stuck Low	This DTC sets in continuous memory if the steering wheel position sensor message sent by the PSCM or the SCCM over the HS-CAN does not match the other sensor information received by the ABS module.
C0051:27	Steering Wheel Position Sensor: Signal Rate of Change Above Threshold	This DTC sets in continuous memory if the steering wheel position sensor message sent by the PSCM or the SCCM over the HS-CAN indicates a higher rate of change when compared to other sensor information received by the ABS module.
C0051:29	Steering Wheel Position Sensor: Signal Invalid	This DTC sets in continuous memory if the ABS module receives more than 3 steering wheel position sensor messages or less than 1 steering wheel position sensor message during the test period.
C0051:54	Steering Wheel Position Sensor: Missing Calibration	This DTC sets in continuous memory if the ABS module receives a steering wheel position sensor message from the PSCM or SCCM indicating that the steering wheel position sensor cannot find center.
C0051:64	Steering Wheel Position Sensor: Signal Plausibility Failure	This DTC sets in continuous memory if the steering wheel position sensor message sent by the PSCM or the SCCM over the HS-CAN does not match the other sensor information received by the ABS module.

Possible Causes

Vehicle communication bus
Steering wheel rotation sensor
RCM

PINPOINT TEST R: DTCs C0051:23, 27, 29, 54 AND 64

Test Step	Result / Action to Take
R1 CHECK FOR DTCs IN THE RCM , PSCM OR SCCM
Ignition ON. Using a scan tool, carry out the Network Test. Are any DTCs present in the RCM , PSCM or SCCM ?	Yes DIAGNOSE all RCM , PSCM or SCCM DTCs before diagnosing any ABS module DTCs. For RCM DTCs, REFER to Section 501-20B . For PSCM DTCs, REFER to Section 211-00 . For SCCM DTCs, REFER to Section 211-05 . No GO to R2 .
R2 CHECK THE ABS MODULE DTCs
Review the ABS module DTCs retrieved during the Network Test in the previous step. Are ABS module DTCs C0061:xx, C0062:xx, C0063:xx or U0074:88 present in the ABS module?	Yes GO to Pinpoint Test H . No If there are any communication (U-Code) DTCs present in the ABS module, DIAGNOSE those before diagnosing any C0051:xx DTCs. If there are any C0051:xx DTCs present, GO to R3 . For all other ABS module DTCs, REFER to the ABS Module DTC Chart. If no DTCs are present in the ABS module, GO to R4 .
R3 CENTER THE STEERING WHEEL ROTATION SENSOR
Center the clockspring and steering wheel rotation sensor. Refer to the Clockspring Adjustment general procedure in Section 501-20B . Test drive the vehicle at speeds greater than 20 km/h (12 mph) and make at least 1 left turn and 1 right turn. Using a scan tool, carry out the ABS module self-test. Are there are C0051:xx DTCs present in the ABS module?	Yes GO to R9 . No The concern is not present and cannot be recreated at this time. The DTC may have been set due to an off center steering wheel rotation sensor.
R4 CHECK THE ABS MODULE YAW RATE (YAW_RATE) PID
Enter the following diagnostic mode on the scan tool: DataLogger — ABS Module . Read and record the YAW_RATE PID with the vehicle on level ground and at a complete standstill. Monitor the YAW_RATE PID while rocking and shaking the vehicle. Is the YAW_RATE PID value between -0.05 and 0.05 with the vehicle at a standstill and does the PID fluctuate when the vehicle is moved?	Yes GO to R5 . No GO to R8 .
R5 CHECK THE ABS MODULE LATERAL ACCELERATION (LAT_ACCL) PID
Read and record the LAT_ACCL PID with the vehicle on level ground and at a complete standstill. Monitor the LAT_ACCL PID while rocking and shaking the vehicle. Is the LAT_ACCL PID value between -0.4 and 0.4 with the vehicle at a standstill and does the PID fluctuate when the vehicle is moved?	Yes GO to R6 . No GO to R8 .
R6 CHECK THE ABS MODULE LONGITUDINAL ACCELERATION (LONG_ACCL) PID
Read and record the LONG_ACCL PID with the vehicle on level ground and at a complete standstill. Monitor the LONG_ACCL PID while rocking and shaking the vehicle. Is the LONG_ACCL PID value between -0.4 and 0.4 with the vehicle at a standstill and does the PID fluctuate when the vehicle is moved?	Yes GO to R7 . No GO to R8 .
R7 CHECK THE ABS MODULE ROLL RATE (ROLL_RATE) PID
Read and record the ROLL_RATE PID with the vehicle on level ground and at a complete standstill. Monitor the ROLL_RATE PID while rocking and shaking the vehicle. Is the ROLL_RATE PID value between -0.05 and 0.05 with the vehicle at a standstill and does the PID fluctuate when the vehicle is moved?	Yes GO to R9 . No GO to R8 .
R8 CHECK THE RCM INSTALLATION AND MOUNTING SURFACE
Ignition OFF. If not previously directed to do so, depower the SRS . Refer to Supplemental Restraint System (SRS) Depowering and Repowering in Section 501-20B . Inspect the RCM installation and make sure that the fasteners are fully seated and tightened correctly. Refer to Section 501-20B . Inspect the mounting surface for damage, corrosion or foreign material. Is the RCM installed correctly and is the mounting surface clean and free from damage?	Yes GO to R10 . No REPAIR or INSTALL new as necessary. REPOWER the SRS . REFER to Supplemental Restraint System (SRS) Depowering and Repowering in Section 501-20B .
R9 CHECK FOR AN INTERMITTENT FAULT CONDITION
Disconnect: RCM C310A . Disconnect: RCM C310B . Disconnect: SCCM C2414A . Disconnect: SCCM C2414B . Disconnect: ABS Module C135 . Remove the steering wheel rotation sensor. Refer to Steering Wheel Rotation Sensor . inspect the connectors (including any in-line connectors) for corrosion, loose or spread terminals and loose or frayed wire connections at terminals. inspect the wire harnesses for any damage, pinched, cut or pierced wires. repair any concerns found. Refer to Wiring Diagrams Cell 5 , Connector Repair Procedures for schematic and connector information. Install the steering wheel rotation sensor. Refer to Steering Wheel Rotation Sensor . Connect: All Previously Disconnected Components and Connectors . Repower the SRS . Do not prove out the SRS at this time. Refer to Supplemental Restraint System (SRS) Depowering and Repowering in Section 501-20B . Perform a road test. Ignition ON. Enter the following diagnostic mode on the scan tool: Self Test — ABS Module . Is the concern still present?	Yes INSTALL a new steering wheel rotation sensor. REFER to Steering Wheel Rotation Sensor . CLEAR all CMDTCs . PERFORM a road test. REPEAT the ABS module self test. If the concern is still present, GO to R10 . If other DTCs are present, REFER to the appropriate DTC chart. No The concern is not present and cannot be recreated at this time. The DTC may have been set due to high network traffic, an intermittent fault condition or a loose or corroded connector. Do not install any new SRS components at this time. SRS components should only be installed when directed to do so in the pinpoint test.
R10 CHECK THE RCM FOR CORRECT OPERATION
Depower the SRS . Refer to Supplemental Restraint System (SRS) Depowering and Repowering in Section 501-20B . Disconnect: RCM C310A . Disconnect: RCM C310B . Prior to reconnecting any previously disconnected SRS component: inspect the connectors (including any in-line connectors) for pushed-out, loose or spread terminals and loose or frayed wire connections at terminals. inspect the wire harness for any damage, pinched, cut or pierced wires. inspect RCM C310A and C310B CPA lever/lock for correct operation. Refer to RCM in Section 501-20B . repair any concerns found. Refer to Wiring Diagrams Cell 5 , Connector Repair Procedures for schematic and connector information. Connect: All Previously Disconnected Connectors . Repower the SRS . Do not prove out the SRS at this time. Refer to Supplemental Restraint System (SRS) Depowering and Repowering in Section 501-20B . Test drive the vehicle at speeds greater than 20 km/h (12 mph) and make at least 1 left turn and 1 right turn. Ignition ON. Enter the following diagnostic mode on the scan tool: Self Test — ABS Module . Is the concern still present?	Yes INSTALL a new RCM . REFER to Section 501-20B . No The concern is not present and cannot be recreated at this time. The DTC may have been set due to high network traffic, an intermittent fault condition or a loose or corroded connector.

Pinpoint Test S: DTC C1A77:11

Diagnostic Overview

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Section 100-00 for information about these practices.

Refer to Wiring Diagrams Cell 42 , Vehicle Dynamic Systems for schematic and connector information.

Normal Operation and Fault Conditions

The solenoid valves in the HCU require an operating voltage that is between 10 and 17 volts. The HCU receives this voltage from the ABS module and the ABS module receives this voltage from the BJB . The ABS module has 2 ground circuits located in the left-hand side of the engine compartment near the BJB . Excessive resistance or an open in one or more of these circuits, a discharged battery or a inoperative charging system result in the ABS module setting a DTC.

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Conditions
C1A77:11	Valve Relay Supply Circuit: Circuit Short to Ground	This DTC sets in continuous memory when the solenoid valve voltage supplied to the ABS module is below a predetermined threshold.

Possible Sources

Fuse
Wiring, terminals or connectors
ABS module

PINPOINT TEST S: DTC C1A77:11

Test Step

Result / Action to Take

S1 CHECK THE SOLENOID VALVE VOLTAGE SUPPLY

Ignition OFF.
Measure and record the battery voltage.
Disconnect: ABS Module C135.
Ignition ON.
Measure the voltage between:

Positive Lead		Negative Lead
Pin	Circuit	Pin	Circuit
C135-25	SBB43 (BU/RD)	—	Ground

Is the voltage within 0.2 volt of the recorded battery voltage?

Yes
GO to S2 .

No
VERIFY fuse 43 (20A) is OK.

If not OK, REFER to the Wiring Diagrams manual to identify the cause of the circuit short.

If OK, GO to S3 .

S2 CHECK THE ABS MODULE GROUND CIRCUIT FOR AN OPEN

Ignition OFF.
Disconnect the battery negative cable. Refer to Section 414-01 .
Measure the resistance between:

Positive Lead		Negative Lead
Pin	Circuit	Pin	Circuit
C135-13	GD120 (BK/GN)	—	Ground
C135-38	GD120 (BK/GN)	—	Ground

Is the resistance less than 3 ohms?

Yes
GO to S4 .

No

Refer to Wiring Diagrams Cell 10-2 , Grounds for schematic and connector information.

INSPECT ground G101 for corrosion, loose fastener, damaged or missing connections. REPAIR the circuit and/or ground connection as necessary.

S3 CHECK THE BJB ELECTRICAL CONNECTION

Access the underside of the BJB .
Using a good light source, inspect the solenoid valve circuit connection for corrosion, pushed out terminal, bent terminal or a loose/unlocked terminal.
Refer to Wiring Diagrams Cell 42-1 , Vehicle Dynamic Systems for schematic and connector information.
Using a suitable mating terminal, check each female terminal for deformed or enlarged contacts by comparing the mating terminal's fit between each terminal of BJB fuse 43 (20A).
Do the terminals fit correctly and are they free of corrosion and damage?

Yes
GO to S4 .

No
REPAIR the circuit and/or terminal or INSTALL a new component as necessary.

S4 CHECK FOR CORRECT ABS MODULE OPERATION

Inspect the ABS module electrical connector.
Repair:

corrosion (install new connector or terminal - clean module pins)
damaged or bent pins - install new terminals or pins
pushed-out pins - install new pins as necessary

Connect the battery negative cable. Refer to Section 414-01 .
Connect: ABS Module C135.
Make sure the connector seats and latches correctly, then operate the system and determine if the concern is still present.
Is the concern still present?

Yes
CHECK for any applicable TSBs. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW the TSB instructions.

If no TSBs address this concern, INSTALL a new ABS module. REFER to Anti-Lock Brake System (ABS) Module in this section.

No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.