B1B50:12

Parking Aid

Pinpoint Test C: DTC B1B44:12, B1B46:12, B1B48:12 Or B1B50:12

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

Normal Operation

The Parking Aid Module (PAM) supplies a reference voltage and signal return to the rear parking aid sensors. A fault condition occurs when the PAM (Parking Aid Module) detects a short to voltage on the parking aid sensor signal circuit.





This pinpoint test is intended to diagnose the following:

- Wiring, terminals or connectors

- Parking aid sensor

- PAM (Parking Aid Module)

PINPOINT TEST C : DTC B1B44:12, B1B46:12, B1B48:12 OR B1B50:12

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

C1 RETRIEVE THE DTCs FROM BOTH THE CONTINUOUS AND ON-DEMAND PAM (Parking Aid Module) SELF-TESTS

- Check the PAM (Parking Aid Module) DTCs from the continuous and on-demand self-tests.

Are multiple DTCs recorded?

Yes
GO to C2.

No
For DTC B1B44:12, B1B46:12, B1B48:12 or B1B50:12, GO to C3.

For all other DTCs, REFER to DTC Charts Parking Aid.

C2 CHECK THE BUMPER WIRING HARNESS

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

Is the bumper wiring harness OK?

Yes
GO to C3.

No
REPAIR or INSTALL a new bumper wiring harness. CLEAR the DTCs. TEST the system for normal operation.

C3 CHECK THE REAR SENSOR CIRCUITRY FOR SHORTS TO VOLTAGE

- Ignition OFF.

- Disconnect: Suspect Parking Aid Sensor C4009, C4010, C4011 and/or C4012.

- Disconnect: PAM (Parking Aid Module) C4014.

- Ignition ON.

- Measure the voltage between the suspect parking aid sensor, harness side and ground as follows:

DTC Rear Sensor Connector- Pin Circuit B1B44:12 RH outer C4011-2 VMP17 (YE/OG) B1B46:12 RH inner C4012-2 VMP16 (YE/GY) B1B48:12 LH outer C4009-2 VMP15 (YE/GN) B1B50:12 LH inner C4010-2 VMP14 (WH/OG)






Is any voltage present?

Yes
REPAIR the circuit in question. CLEAR the DTCs. TEST the system for normal operation.

No
If all sensor DTCs are set, GO to C5.

Otherwise, GO to C4.

C4 CHECK THE PARKING AID SENSORS

- Install a known good parking aid sensor(s) for each of the suspect parking aid sensor(s).

- Clear the DTCs. Repeat the self-test.

- Test the system for normal operation.

Is the concern still present?

Yes
GO to C5.

No
If one or more parking aid sensor(s) recorded DTCs, INSTALL a new sensor(s) for the one in question. REFER to Parking Aid Sensor . CLEAR the DTCs. TEST the system for normal operation.

C5 CHECK FOR CORRECT PAM (Parking Aid Module) OPERATION

- Disconnect the PAM (Parking Aid Module) connector.

- Check for:
- corrosion

- damaged pins

- pushed-out pins


- Connect the PAM (Parking Aid Module) 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 (Parking Aid Module). REFER to Parking Aid Module (PAM) . 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.