B129C:12

Diagnostic Routine C

Diagnostic Overview

B129C:12 Or B129D:12

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

Normal Operation and Fault Conditions

DTC Fault Trigger Conditions






Pinpoint Test

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

1. RETRIEVE THE DTCs (Diagnostic Trouble Codes) FROM THE PAM (Parking Aid Module) SELF-TEST

1. Using a scan tool, perform PAM (Parking Aid Module) self-test.

Are multiple DTCs (Diagnostic Trouble Codes) recorded?








2. CHECK THE BUMPER WIRING HARNESS

1. Inspect the front bumper wiring harness for opens, shorts, grounds, or corrosion.

Is the bumper wiring harness OK?








3. CHECK THE ACTIVE PARK ASSIST SENSOR CIRCUITRY FOR SHORTS TO VOLTAGE

1. Ignition OFF.

2. Disconnect: Suspect Active Park Assist Sensor.

3. Disconnect: PAM (Parking Aid Module).

4. Ignition ON.

5. For DTC (Diagnostic Trouble Code) B129C:12, measure:








6. For DTC (Diagnostic Trouble Code) B129D:12, measure:








Is any voltage present?








4. CHECK THE ACTIVE PARK ASSIST SENSOR CIRCUITRY FOR A SHORT TOGETHER

1. For DTC (Diagnostic Trouble Code) B129C:12, measure:








2. For DTC (Diagnostic Trouble Code) B129D:12, measure:








Is the resistance greater than 10,000 ohms?








5. CHECK THE ACTIVE PARK ASSIST SENSORS

1. Install a known good active park assist sensor for the suspect active park assist sensor.

2. Run on-demand self-test (required to clear certain DTCs (Diagnostic Trouble Codes)). Correct any unresolved DTCs (Diagnostic Trouble Codes). Clear all DTCs (Diagnostic Trouble Codes).

3. Test the system for normal operation.

Is the concern still present?








6. CHECK FOR CORRECT PAM (Parking Aid Module) OPERATION

1. Disconnect and inspect the PAM (Parking Aid Module) connector.

2. Repair:

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

3. Reconnect the PAM (Parking Aid Module) connector. Make sure it seats and latches correctly.

4. Operate the system and determine if the concern is still present.

Is the concern still present?