SECTION 501-09: Rear View Mirrors
| 2014 Flex Workshop Manual
|
DESCRIPTION AND OPERATION
| Procedure revision date: 05/02/2013
|
Exterior, Power
Overview
Power mirrors allow the LH and RH exterior mirror glass to be positioned electronically. The position of the power mirror glass is controlled by the exterior mirror control switch. The LH or RH button of the exterior mirror selection switch determines which power mirror glass to control.
The LH and RH exterior mirrors may be equipped with approach or puddle lamps, which will illuminate when the interior lights are turned on by opening a door or by pressing the unlock button on the transmitter. Refer to Section 417-02 .
The LH and RH exterior mirrors may be equipped with either a spotter mirror in the upper outboard corner of the exterior mirror glass or BLIS® / CTA indicators. For more information about BLIS® system operation, refer to Section 419-04 .
System Operation
The LH and RH exterior mirror glass movement is controlled by the exterior mirror control switch and the LH and RH exterior mirror motors. The BCM supplies voltage to the exterior mirror control switch at all times. When the exterior mirror control switch is pressed in the up, down, left or right direction, the switch supplies voltage and ground to the appropriate exterior mirror motor.
Component Description
The exterior mirror control switch is momentary contact switch that is integral to the master window control switch. The exterior mirror control switch incorporates a selection switch to allow the driver to determine which exterior mirror will be adjusted.
Each exterior mirror has 2 bi-directional motors that are used to control the up, down, left and right movement of the exterior mirror glass. The exterior mirrors use a jumper harness between the vehicle wiring harness and the exterior mirror motors. This jumper harness in integral to the exterior mirror. If a concern exists with the exterior mirror jumper harness exists and cannot be repaired, a new exterior mirror must be installed.
Exterior, Memory
Overview
The memory mirror function allows the preferred positioning of the LH and RH exterior mirror glass to be saved or recalled. When a memory position is recalled by the operator, the LH and RH exterior mirror glass automatically adjusts to the preferred position stored in memory.
The LH and RH exterior mirrors may be equipped with approach or puddle lamps, which will illuminate when the interior lights are turned on by opening a door or by pressing the unlock button on the transmitter. Refer to Section 417-02 .
The LH and RH exterior mirrors may be equipped with either a spotter mirror in the upper outboard corner of the exterior mirror glass or BLIS® / CTA indicators. For more information about BLIS® system operation, refer to Section 419-04 .
System Operation
Network Message Chart
Module Network Input Messages — DSM
| Broadcast Message | Originating Module | Message Purpose |
|---|---|---|
| Memory Switch Status | DDM | The memory switch status message contains the inputs from the memory set or memory recall switches to the DDM . This information is used to position or save the position of the passenger mirror. |
| Passenger Mirror Switch Status | DDM | The passenger mirror switch status message contains the inputs from the exterior mirror control switch to the DDM . This information is used to control the passenger mirror from the exterior mirror control switch. |
On vehicles equipped with memory mirrors, when the exterior mirror control switch is pressed up, down, left or right, a voltage signal is sent to the DDM to indicate the desired mirror movement. If the LH mirror is selected when the exterior mirror control switch is pressed, the DDM will supply voltage and ground to the appropriate LH exterior mirror motor. If the RH mirror is selected when the exterior mirror control switch is pressed, the DDM sends the movement request over the MS-CAN to the DSM . The DSM will then supply voltage and ground to the appropriate RH exterior mirror motor.
The memory function recalls the preferred position of the exterior mirrors when the transmission is in PARK or NEUTRAL and the memory set switch, RKE transmitter (without IA ) or IA key (with IA ) is activated. When a memory recall is initiated, the DDM and DSM recall the corresponding preferred exterior mirror glass positions. The DDM and DSM supply voltage and ground to the appropriate exterior mirror motors to achieve the desired memory positions based on feedback from the mirror motor potentiometers. If the exterior mirror control switch is activated in any direction during a memory recall, the recall is aborted and the selected exterior mirror will respond to the switch inputs. For more information about the operation of the memory feature, refer to Section 501-10 .
Component Description
The exterior mirror control switch is momentary contact switch that is integral to the master window control switch. The exterior mirror control switch incorporates a selection switch to allow the driver to determine which exterior mirror will be adjusted.
The memory set switch allows driver to recall or save preferred positioning of the exterior mirror glass. The memory set switch is a momentary ground contact switch that supplies a ground to the DDM corresponding to the memory button that is pressed.
The DSM supplies voltage and ground to move the RH exterior mirror motors and determines the mirror position by monitoring the motor potentiometers. RH exterior mirror position information corresponding to memory pre-sets is stored in the DSM . The DSM is also capable of setting and storing DTCs for the RH exterior mirror when a concern exists.
The DDM supplies voltage and ground to move the LH exterior mirror motors and determines the mirror position by monitoring the motor potentiometers. LH exterior mirror position information corresponding to memory pre-sets is stored in the DDM . The DDM is capable of setting and storing DTCs for the LH exterior mirror when a concern exists
Each exterior mirror is equipped 2 bi-directional motors that are used to control the up/down and left/right position of the exterior mirror glass. Each exterior mirror motor has an integral potentiometer that is monitored by the DDM (LH mirror) or DSM (RH mirror). The exterior mirrors use a jumper harness between the vehicle wiring harness and the exterior mirror motors. The jumper harness is integral to the exterior mirror. If a concern with the exterior mirror jumper harness exists and cannot be repaired, a new exterior mirror must be installed.
Exterior, Heated
Overview
The exterior mirrors are available with heated mirror glass, which heats the mirror glass to remove frost, snow, ice and condensation. The rear window defrost system controls the operation of the heated exterior mirrors. The heated mirrors only operate when the rear window defrost is on.
System Operation
Network Message Chart
Module Network Input Messages — FCIM
| Broadcast Message | Originating Module | Message Purpose |
|---|---|---|
| Climate control status | HVAC Module | The climate control statue message contains the rear window defrost request information. When the rear window defrost function is active, this input is used to change the status of the rear defrost indicator. |
Module Network Input Messages — APIM (with SYNC® and 8-inch (203 mm) touchscreen)
| Broadcast Message | Originating Module | Message Purpose |
|---|---|---|
| Climate control status | HVAC Module | The climate control statue message contains the rear window defrost request information. When the rear window defrost function is active, this input is used to change the status of the rear defrost indicator. |
Module Network Input Messages — HVAC Module
| Broadcast Message | Originating Module | Message Purpose |
|---|---|---|
| Climate control requests | APIM (with SYNC® and 8-inch (203 mm) touchscreen) | The climate control requests message contains the rear window defrost request information. When the rear window defrost function is requested, this input is used to activate the rear window defrost system and heated exterior mirrors. |
| Climate control requests | FCIM | The climate control requests message contains the rear window defrost request information. When the rear window defrost function is requested, this input is used to activate the rear window defrost system and heated exterior mirrors. |
The rear window defrost system controls operation of the heated exterior mirror glass. The heated exterior mirror glass only operates when the rear window defrost system is active. The heated exterior rear view mirror glass deactivates when the rear window defrost deactivates. The heated mirror glass receives voltage from the rear window defrost relay located inside the BJB . The LH and RH heated mirror glass does not share the same ground.
Component Description
The HVAC module uses inputs generated by the vehicle occupants through the FCIM , FDIM and voice commands to control the climate system. The HVAC module is remotely located and separate from the control interfaces. When rear window defrost is selected, the FCIM , FDIM or APIM communicates through the I-CAN and the MS-CAN to the HVAC module to turn ON the defrost relay.
The heated power exterior mirrors use a heating element that is integral to the exterior mirror glass.
Exterior, Power Folding
Overview
The vehicle may be equipped with manual or power fold mirrors. When equipped with power fold mirrors, the side mirrors fold simultaneously using the exterior mirror control switch. The RH power fold mirror completes its fold slightly faster than the LH mirror due to a shorter angular fold distance. Press the button to fold the mirrors in or out. The power fold mirrors may be folded or unfolded manually. However, if a mirror is moved manually, they must be re-synchronized. Refer to Motor Synchronization — Exterior, Power Folding .
System Operation
The optional power folding exterior mirrors are controlled by the DSM . The power folding exterior mirror feature allows both exterior mirrors to be folded or unfolded using the exterior mirror control switch. The DSM controls power folding mirror movement by reversing the polarity of voltage and ground it supplies to the power folding mirror motors. The RH and LH power folding mirrors fold or unfold at the same time and cannot be controlled independently. The mirrors operate in the opposite direction of the last switch activation.
When the ignition is ON and the exterior mirror control switch is set to the center position and pressed rearward to the FOLD/UNFOLD position, a ground signal is sent to the DSM . The DSM then supplies voltage and ground to the power fold motors to fold or unfold the mirrors.
The DSM controls power fold mirror operation but does not use memory mirror potentiometer information for operation of the power fold mirrors.
If the power folding mirrors are folded or unfolded continuously (6 to 10 cycles), the power lockout feature disables the system for approximately 3-10 minutes to prevent damage to the power folding mirror drive motors. After 3-10 minutes have elapsed, normal operation resumes. Before running a self-test or retrieving DTCs, the power fold switch must be inactive for at least 30 seconds.
The power fold mirrors may be moved inward/outward manually. If a mirror is moved manually, it needs to be re-synchronized. A mirror which has not been re-synchronized may appear to be loose.
Component Description
The exterior mirror control switch provides the driver with the controls to fold or unfold the driver and passenger mirror. To activate the folding/unfolding function, the exterior mirror control switch is in the center position and pressed rearward to the FOLD/UNFOLD position.
The DSM incorporates multiple functions into one module and offers diagnostics to easily locate and repair concerns affecting the subsystems that it controls. The power folding mirrors are controlled by the DSM . The DSM is capable of setting DTCs for the memory and power folding mirrors when a system concern exists.
Each optional power fold exterior rear view mirror has an internal motor to fold or unfold the mirror that is not replaceable. If a power folding mirror drive motor is found to be inoperative, a new power folding exterior rear view mirror assembly must be installed
Interior
Overview
The interior rear view mirror has pivot point(s) which allows adjustment of the mirror up or down and from side to side. The interior mirror may be equipped with the manual dimming or auto-dimming feature. The manual dimming function is completely controlled by the driver. The auto-dimming function electronically darkens the interior mirror glass when bright lights (glare) are detected from behind the vehicle during nighttime conditions.
System Operation
The manual dimming interior rear view mirror has a lever at the back of the mirror that must be pulled forward or pushed rearward by the driver to activate the manual dimming function. Manual dimming is completely controlled by the driver.
The interior auto-dimming rear view mirror automatically reduces the glare caused by headlamps reflecting in the interior rear view mirror. Voltage is supplied to the interior auto-dimming mirror when the ignition is in ACC or ON. When the forward facing sensor detects daytime conditions, the rearward facing sensor is inactive and the mirror stays in a high reflectance mode. When the forward facing sensor detects nighttime conditions, the rearward facing sensor is active and detects glare from the headlights of vehicles approaching from the rear, or other glare producing light sources. To provide increased visibility when backing up, the interior rear view mirror automatically returns to a high reflectance mode whenever the vehicle is in REVERSE.
Component Description
The auto-dimming rear view mirror has 2 photoelectric sensors, forward facing and rearward facing, that detect forward and rearward light conditions. Based on inputs from these sensors, the automatic dimming feature adjusts the reflectance level of the interior rear view mirror glass to eliminate unwanted glare. The reflectance level of the mirror glass is variable and depends on the amount of rear glare in relation to ambient light conditions in front of the interior mirror.