Pinpoint Test A: The Parking Aid Is Inoperative/Does Not Operate Correctly

Parking Aid

Pinpoint Tests

Pinpoint Test A: The Parking Aid Is Inoperative/Does Not Operate Correctly

Refer to Wiring Diagram Set 131 for schematic and connector information. Diagrams By Number

Normal Operation

The parking aid system is enabled when the ignition switch is in the RUN position and the REVERSE (R) gear is selected. The Parking Aid Module (PAM) receives reverse gear input from the Instrument Cluster (IC) through the Medium Speed Controller Area Network (MS-CAN). A reference voltage and signal return is supplied to the parking aid sensors from the PAM. The PAM receives an input signal from each individual parking aid sensor. The system can be disabled through the message center which is part of the IC.

This pinpoint test is intended to diagnose the following:

- Wiring, terminals or connectors
- Parking aid sensors alignment
- PAM
- Rear bumper



PINPOINT TEST A: THE PARKING AID IS INOPERATIVE/DOES NOT OPERATE CORRECTLY

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A1 CHECK THE DTCs FROM BOTH THE CONTINUOUS AND ON-DEMAND PAM SELF-TESTS


- Check the PAM DTCs from the continuous and on-demand self-tests.
- Are any PAM DTCs recorded?

Yes
REFER to DTC Charts. Parking Aid

No
GO to A2.

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A2 CHECK THE MESSAGE CENTER FOR CORRECT OPERATION


- While observing the IC message center, operate the message center.
- Does the message center operate correctly?

Yes
GO to A3.

No
REFER to Instrument Panel, Gauges and Warning Indicators.

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A3 CHECK FOR CORRECT REVERSE GEAR INPUT


- Apply the parking brake.
- Ignition ON.
- Select REVERSE.
- Enter the following diagnostic mode on the scan tool: PAM DataLogger.
- Monitor the PAM PID (TRANSGR).
- Does the PID indicate YES (transmission in REVERSE)?

Yes
GO to A4.

No
GO to A5.

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A4 CHECK THE PARKING AID SENSORS FOR CORRECT ALIGNMENT


NOTE: If the vehicle was in a rear end collision, the parking aid sensors may not be aligned correctly.

- Check the bumper for correct alignment.
- Carry out the azimuth system check. Refer to Azimuth System Check Azimuth System Check.
- Carry out the elevation system check. Refer to Elevation System Check Elevation System Check.
- Does the parking aid system pass both system checks?

Yes
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.

No
REALIGN or INSTALL a new bumper. REFER to Bumper. If the vehicle was in a rear end collision, further body work may be required to bring the parking aid sensors into correct alignment.

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A5 CHECK FOR CORRECT PAM OPERATION


- Disconnect the PAM connector.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect the PAM connector and make sure it seats correctly.
- Operate the system and determine if the concern is still present.
- Is the concern still present?

Yes
INSTALL a new PAM. REFER to Parking Aid Module (PAM) Service and Repair. TEST the system for normal operation.

No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.

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