Pinpoint Test C: DTC B1B36:12, B1B38:12, B1B40:12, B1B42:12, B1B44:12, B1B46:12, B1B48:12 Or B1B50:12

NOTE: 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 SELF-TESTS
- Check the PAM 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 DTC B1B36:12, B1B38:12, B1B40:12 or B1B42:12, GO to C4.
    
    For all other DTCs, REFER to DIAGNOSTIC TROUBLE CODE (DTC) TABLES .
C2 CHECK THE BUMPER WIRING HARNESS
- Inspect the bumper wiring harness for opens, shorts, grounds, or corrosion.
- Is the bumper wiring harness OK?
  - Yes : For DTCs B1B44:12, B1B46:12, B1B48:12 and/or B1B50:12, GO to C3.
    For DTCs B1B36:12, B1B38:12, B1B40:12 and/or B1B42:12, GO to C4.
    
    For all other DTCs, REFER to DIAGNOSTIC TROUBLE CODE (DTC) TABLES .
  - 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 C4014 (Rear) or C4226a (Front and Rear).
Ignition ON.

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

CONNECTOR-PIN REFERENCE TABLE

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)

Fig 1: Measuring Voltage Between Suspect Parking Aid Sensor, Harness Side And Ground

Courtesy of FORD MOTOR CO.

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 C6. Otherwise, GO to C5.

C4 CHECK THE FRONT SENSOR CIRCUITRY FOR SHORTS TO VOLTAGE

Ignition OFF.
Disconnect: Suspect Parking Aid Sensor C1428, C1429, C1430 and/or C1431.
Disconnect: PAM C4226b.
Ignition ON.

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

CONNECTOR-PIN REFERENCE TABLE

DTC	Front Sensor	Connector-Pin	Circuit
B1B36:12	RH outer	C1431-2	VMP13 (BU/OG)
B1B38:12	RH inner	C1430-2	VMP12 (BU/GY)
B1B40:12	LH outer	C1428-2	VMP11 (BU/GN)
B1B42:12	LH inner	C1429-2	VMP10 (WH/BU)

Fig 2: Measuring Voltage Between Suspect Parking Aid Sensor, Harness Side And Ground

Courtesy of FORD MOTOR CO.

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 C6. Otherwise, GO to C5.

C5 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 C6.
  - 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 - FRONT or PARKING AID SENSOR - REAR . CLEAR the DTCs. TEST the system for normal operation.
C6 CHECK FOR CORRECT PAM OPERATION
- Disconnect the PAM connector.
- Check for:
  - corrosion
  - damaged pins
  - pushed-out pins
- Connect the PAM 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. 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. CLEAR the DTCs. REPEAT the self-test.