Pinpoint Test P : B1B44:12, B1B46:12, B1B48:12, B1B50:12
- P1 RETRIEVE THE DIAGNOSTIC TROUBLE CODES (DTCS) FROM THE PAM (PARKING ASSIST CONTROL MODULE) SELF-TEST
- Ignition ON.
- Using a diagnostic scan tool, perform the PAM self-test.
- Check the PAM Diagnostic Trouble Codes (DTCs) from the self-test.
Are multiple rear parking aid sensor Diagnostic Trouble Codes (DTCs) recorded?
Yes GO to P2 No For Diagnostic Trouble Codes (DTCs) B1B44:12, B1B46:12, B1B48:12 or B1B50:12, GO to P3 For all other Diagnostic Trouble Codes (DTCs), REFER to the DTC Chart in this information. - P2 CHECK THE REAR BUMPER WIRING HARNESS
- Ignition OFF.
- Inspect the rear bumper wiring harness for opens, shorts, grounds, or corrosion.
Is the rear bumper wiring harness OK?
Yes GO to P3 No REPAIR or INSTALL a new rear bumper wiring harness. - P3 CHECK THE REAR PARKING AID SENSOR CIRCUITS FOR A SHORT TO VOLTAGE
- Ignition OFF.
- Disconnect: Suspect Parking Aid Sensor(s).
- Disconnect: BCM C2280D
- Ignition ON.
- For DTC B1B44:12, measure:
Positive Lead Measurement / Action Negative Lead Refer to C4011-2 Ground
- For DTC B1B46:12, measure:
Positive Lead Measurement / Action Negative Lead Refer to C4012-2 Ground
- For DTC B1B48:12, measure:
Positive Lead Measurement / Action Negative Lead Refer to C4009-2 Ground
- For DTC B1B50:12, measure:
Positive Lead Measurement / Action Negative Lead Refer to C4010-2 Ground
Is any voltage present?
Yes REPAIR the circuit. No GO to P4 - P4 CHECK THE REAR PARKING AID SENSOR SIGNAL AND VREF CIRCUITS FOR A SHORT TOGETHER
- Ignition OFF.
- For DTC B1B44:12, measure:
Positive Lead Measurement / Action Negative Lead Refer to C4011-2 Refer to C4011-1
- For DTC B1B46:12, measure:
Positive Lead Measurement / Action Negative Lead Refer to C4012-2 Refer to C4012-1
- For DTC B1B48:12, measure:
Positive Lead Measurement / Action Negative Lead Refer to C4009-2 Refer to C4009-1
- For DTC B1B50:12, measure:
Positive Lead Measurement / Action Negative Lead Refer to C4010-2 Refer to C4010-1
Is the resistance greater than 10, 000 ohms?
Yes If all the sensor Diagnostic Trouble Codes (DTCs) are set, GO to P5 If one or more (but not all) parking aid sensor(s) recorded Diagnostic Trouble Codes (DTCs), INSTALL a new sensor(s) for the one in question. REFER to: Rear Parking Aid Sensor . No REPAIR the circuit. - P5 CHECK FOR CORRECT BCM (BODY CONTROL MODULE) OPERATION
- Ignition OFF.
- Disconnect and inspect all BCM connectors.
- 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
- Reconnect the BCM connectors. Make sure they seat and latch correctly.
- Operate the system and determine if the concern is still present.
Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, Refer to BCM GUIDED ROUTINE TESTING No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.