Pinpoint Test D : DTC (Diagnostic Trouble Code) B1B44:12, B1B46:12, B1B48:12, B1B50:12
- D1 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 parking aid sensor Diagnostic Trouble Codes (DTCs) recorded?
Yes GO to D2 No For Diagnostic Trouble Codes (DTCs) B1B44:12, B1B46:12, B1B48:12 or B1B50:12, GO to D3 For all other Diagnostic Trouble Codes (DTCs), REFER to DTC Chart: PAM . - D2 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 D3 No REPAIR or INSTALL a new rear bumper wiring harness. - D3 CHECK THE PARKING AID SENSOR CIRCUITRY FOR A SHORT TO VOLTAGE
- Ignition OFF.
- Disconnect: Suspect Parking Aid Sensor(s).
- Disconnect: BCM C2280D.
- Ignition ON.
- Measure:
DTC B1B44:12
Positive Lead Measurement / Action Negative Lead C4011-2 Ground DTC B1B46:12
Positive Lead Measurement / Action Negative Lead C4012-2 Ground DTC B1B48:12
Positive Lead Measurement / Action Negative Lead C4009-2 Ground DTC B1B50:12
Positive Lead Measurement / Action Negative Lead C4010-2 Ground
Is any voltage present?
Yes REPAIR the circuit in question. No GO to D4 - D4 CHECK THE PARKING AID SENSOR CIRCUITRY FOR A SHORT TOGETHER
- Measure:
DTC B1B44:12
Positive Lead Measurement / Action Negative Lead C4011-2 C4011-1 DTC B1B46:12
Positive Lead Measurement / Action Negative Lead C4012-2 C4012-1 DTC B1B48:12
Positive Lead Measurement / Action Negative Lead C4009-2 C4009-1 DTC B1B50:12
Positive Lead Measurement / Action Negative Lead C4010-2 C4010-1
Is the resistance greater than 10, 000 ohms?
Yes If all the sensor Diagnostic Trouble Codes (DTCs) are set, GO to D5 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 in question. - Measure:
- D5 CHECK FOR CORRECT BCM (BODY CONTROL MODULE) OPERATION
- Ignition OFF.
- Disconnect and inspect all BCM connectors and related in-line 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 and related in-line 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 Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW the TSB instructions. If no Technical Service Bulletins (TSBs) 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.