SECTION 413-13A: Parking Aid — Audible
| 2014 Flex Workshop Manual
|
DESCRIPTION AND OPERATION
| Procedure revision date: 05/02/2013
|
Component Location
| Item | Description | Comments |
|---|---|---|
| 1 | PAM | - |
| 2 | Parking aid sensor and bezel | - |
| 3 | Parking aid speaker | - |
Overview
The parking aid system sounds a warning to alert the driver of stationary objects near the rear bumper when REVERSE is selected. The rear sensors are activated when REVERSE is selected. The parking aid system assists the driver in detecting certain objects while the vehicle moves slowly in REVERSE at speeds of less than 4.8 kmh (3 mph). The parking aid system may not detect moving objects.
The parking aid system is active when the ignition switch is in the RUN position and the transmission in REVERSE. The parking aid system is disabled if a fault is detected in 1 of the 4 sensors, the parking aid speaker, or the PAM . This is indicated by a parking aid disabled warning message in the message center.
The parking aid system is enabled and disabled through the message center, located in the IPC .
If a MyKey® restricted key is in use, the parking aid menu is not available in the message center and cannot be deactivated.
System Operation
Network Message Chart
Module Network Input Messages — PAM
| Broadcast Message | Originating Module | Message Purpose |
|---|---|---|
| Ignition status | BCM | Used as a redundant input to confirm the ignition switch position. |
| Ambient air temperature | BCM | Used to temperature compensate the parking aid sensor inputs. |
| Parking aid enable status | IPC | Used to enable or disable the parking aid. |
| Selector lever (PRNDL) status | PCM | Used to enable the parking aid when the transmission selector is in reverse. |
| Wheel speed data | ABS module | Used to disable the parking aid if the vehicle speed exceeds a preset threshold. |
Module Network Input Messages — IPC
| Broadcast Message | Originating Module | Message Purpose |
|---|---|---|
| Parking aid warning status | PAM | Used to reduce the audio output from the audio system so a parking aid speaker chime can be heard. |
Module Network Input Messages — ACM
| Broadcast Message | Originating Module | Message Purpose |
|---|---|---|
| Audio mute | IPC | Used to reduce the audio output from the audio system so a parking aid speaker chime can be heard. |
Module Network Input Messages — Audio DSP Module with Sony® Sound
| Broadcast Message | Originating Module | Message Purpose |
|---|---|---|
| Audio mute | IPC | Used to reduce the audio output from the audio system so a parking aid speaker chime can be heard. |
Parking Aid System Operation
The parking aid system calculates the distance to an object around the rear of the vehicle using 4 ultrasonic sensors. The parking aid sensors detect objects approximately 1,524 mm (60 in) from the rear of the vehicle, 508 mm (20 in) from the rear side of the vehicle, and 304.8 mm (12 in) above the ground.
The PAM calculates the distance to an object within the 170 degree semicircular (azimuth) area around the rear of the vehicle. A variable-rate warning tone is generated from a speaker attached to the PAM .
The PAM can be diagnosed with a scan tool.
Parking Aid Audible Alert
The speaker increases its warning tone rate as the vehicle gets closer to an obstacle. When an object is detected within 304.8 mm (12 in) of the sensors, the warning tone becomes continuous.
When the PAM sounds the parking aid tone, it sends an audio volume cutback message to the IPC which sends a message over the to the ACM . When the ACM receives the message, it reduces the speaker output so the parking aid tone can be heard. If the vehicle is equipped with Sony® sound the audio DSP module reduces the speaker output.
Component Description
Parking Aid Sensors
The parking aid sensors are 3-wire type ultrasonic distance detecting sensors.
Parking Aid Module (PAM)
The PAM calculates and reports via audible output the distance between the rear of the vehicle and an object. The PAM requires PMI when replaced.
Parking Aid Speaker
The parking aid speaker is a variable-rate warning tone and is commanded by the PAM .