PINPOINT TEST C: DTCs B1B44:12, B1B46:12, B1B48:12 AND B1B50:12

WARNING: This page is about a different car, the 2014 Lincoln MKX and 2014 Ford Edge. However, it is still accessible from the selected car via links, so may be relevant.

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 THE PAM SELF-TEST
- Check the PAM DTCs from the self-test.
Are multiple DTCs recorded?
- Yes : GO to C2.
- No : For DTCs B1B44:12, B1B46:12, B1B48:12 and B1B50:12, GO to C3.
  For all other DTCs, REFER to DTC CHARTS .
C2 CHECK THE CONNECTORS FOR CORRECT LATCHING AND THE BUMPER WIRING HARNESS FOR DAMAGE
- Inspect the PAM and sensor connectors for correct latching by pulling on the latched connector.
- Inspect the bumper wiring harness for opens, shorts, grounds, or corrosion.
Are the connectors correctly latched and the bumper wiring harness OK?
- Yes : GO to C3.
- No : Correctly LATCH the connectors or REPAIR or INSTALL a new bumper wiring harness. CLEAR the DTCs. TEST the system for normal operation.

C3 CHECK THE SENSOR CIRCUITRY FOR SHORTS TO VOLTAGE

Ignition OFF.
Disconnect: Suspect Parking Aid Sensor C4009 , C4010 , C4011 or C4012 .
Disconnect: PAM 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)

Fig 1: Measuring Voltage Between Suspect Parking Aid Sensor 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 : GO to C4.

C4 CHECK THE PARKING AID SENSOR CIRCUITRY FOR A SHORT TOGETHER

Measure the resistance between the suspect parking aid sensor pins, harness side as follows:

DTC	Parking Aid Sensor	Connector-Pin/Circuit	Connector-Pin/Circuit
B1B44:12	RH outer	C4011-2 VMP17 (YE/OG)	C4011-1 LMP07 (BU/WH)
B1B46:12	RH inner	C4012-2 VMP16 (YE/GY)	C4012-1 LMP07 (BU/WH)
B1B48:12	LH outer	C4009-2 VMP15 (YE/GN)	C4009-1 LMP07 (BU/WH)
B1B50:12	LH inner	C4010-2 VMP14 (WH/OG)	C4010-1 LMP07 (BU/WH)

Fig 2: Measuring Resistance Between Suspect Parking Aid Sensor Pins

Courtesy of FORD MOTOR CO.

Is the resistance greater than 10, 000 ohms?

Yes : If all sensor DTCs are set, GO to C5.
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.
No : REPAIR the circuits in question. CLEAR the DTCs. TEST the system for normal operation.

C5 CHECK FOR CORRECT PAM OPERATION
- Connect: All Disconnected Connectors.
- 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.