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

D1 RETRIEVE THE DTCs FROM THE PAM SELF-TEST
- Using a scan tool, perform PAM self-test.
- Are multiple DTCs recorded?
- Yes : GO to D2.
- No : For DTCs, B1B44:12, B1B46:12 B1B48:12 and B1B50:12, GO to D3.
  For all other DTCs, REFER to the PAM DTC Chart .
D2 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 D3.
- No : REPAIR or INSTALL a new bumper wiring harness.

D3 CHECK THE SENSOR CIRCUITRY FOR SHORTS TO VOLTAGE

Ignition OFF.
Disconnect: Suspect Parking Aid Sensor C4009, C4010, C4011 and/or C4012.
Disconnect: PAM C4014C.
Ignition ON.

Measure the voltage between:

Positive Lead		Negative Lead
Pin	Circuit	Pin	Circuit
DTC B1B44:12
C4011-2	VMP17 (YE/OG)	-	Ground
DTC B1B46:12
C4012-2	VMP16 (YE/GY)	-	Ground
DTC B1B48:12
C4009-2	VMP15 (YE/GN)	-	Ground
DTC B1B50:12
C4010-2	VMP14 (WH/OG)	-	Ground

Fig 1: Identifying Parking Aid Sensor C4009, C4010, C4011 And C4012 Connector Terminals

Courtesy of FORD MOTOR CO.

Is any voltage present?

Yes : REPAIR the affected circuit.
No : If all sensor DTCs are set, GO to D5. Otherwise, GO to D4.

D4 CHECK THE PARKING AID SENSORS
- Install a known good parking aid sensor(s) for each of the suspect parking aid sensor(s).
- Using a scan tool, clear the DTCs. Repeat the self-test.
- Test the system for normal operation.
- Is the concern still present?
- Yes : GO to D5.
- No : If one or more parking aid sensor(s) recorded DTCs, INSTALL a new sensor(s) for the one(s) in question. REFER to PARKING AID SENSOR - REAR .
D5 CHECK FOR CORRECT PAM OPERATION
- Disconnect and inspect all the PAM connectors.
- Repair:
  - corrosion (install new connector or terminals - clean module pins)
  - damaged pins - install new terminals/pins
  - pushed-out pins - install new pins as necessary
- Reconnect the PAM 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 TSBs. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no TSBs address this concern, INSTALL a new PAM. REFER to PARKING AID MODULE (PAM) .
- No : The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.