Diagnostic Routine M

Diagnostic Routine M

Diagnostic Overview

B1B36:14, B1B38:14, B1B40:14, B1B42:14

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.

2. Check the PAM (Parking Aid Module) DTCs (Diagnostic Trouble Codes) from the self-test.

Are multiple DTCs (Diagnostic Trouble Codes) recorded?






2. CHECK THE BUMPER WIRING HARNESS

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

Is the bumper wiring harness OK?






3. CHECK THE SENSOR CIRCUITRY FOR OPENS

1. Ignition OFF.

2. Disconnect: Suspect Parking Aid Sensor.

3. Disconnect: PAM (Parking Aid Module) C4014B.

4. For DTC (Diagnostic Trouble Code) B1B36:14, measure:





5. For DTC (Diagnostic Trouble Code) B1B38:14, measure:





6. For DTC (Diagnostic Trouble Code) B1B40:14, measure:





7. For DTC (Diagnostic Trouble Code) B1B42:14, measure:





Are the resistances less than 5 ohms?






4. CHECK THE SENSOR CIRCUITRY FOR SHORTS TO GROUND

1. For DTC (Diagnostic Trouble Code) B1B36:14, measure:





2. For DTC (Diagnostic Trouble Code) B1B38:14, measure:





3. For DTC (Diagnostic Trouble Code) B1B40:14, measure:





4. For DTC (Diagnostic Trouble Code) B1B42:14, measure:





Is the resistance greater than 10,000 ohms for the sensor circuit in question?






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

1. Ignition OFF.

2. Disconnect and inspect all PAM (Parking Aid Module) connectors.

3. 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

4. Reconnect the PAM (Parking Aid Module) connectors. Make sure they seat and latch correctly.

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

Is the concern still present?