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

WARNING: This page is about a different car, the 2019 Ford F-550 Super Duty, 2019 Ford F-450 Super Duty, 2019 Ford F-350 Super Duty, and 2019 Ford F-250 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.

D1 RETRIEVE THE DIAGNOSTIC TROUBLE CODES (DTCS) FROM THE PAM (PARKING ASSIST CONTROL MODULE) SELF-TEST

Using a diagnostic scan tool, perform the PAM self-test.

Check the PAM DTCs (diagnostic trouble fcodes) from the self-test.

Are multiple rear parking aid sensor DTCs (diagnostic trouble codes) recorded?

Yes

GO to D2

No	For DTCs (diagnostic trouble codes) B1B44:12, B1B46:12, B1B48:12 or B1B50:12, GO to D3 For all other DTCs (diagnostic trouble codes), REFER to the DTC Chart: Parking Aid Module (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 REAR PARKING AID SENSOR CIRCUITRY FOR A SHORT TO VOLTAGE

Ignition OFF.

Disconnect: Suspect Parking Aid Sensor(s).

Disconnect BCM C2280D.

Ignition ON.

For DTC B1B44:12, measure:

Positive Lead	Measurement / Action	Negative Lead
Refer to C4011-2	Courtesy of FORD MOTOR COMPANY	Ground

For DTC B1B46:12, measure:

Positive Lead	Measurement / Action	Negative Lead
Refer to C4012-2	Courtesy of FORD MOTOR COMPANY	Ground

For DTC B1B48:12, measure:

Positive Lead	Measurement / Action	Negative Lead
Refer to C4009-2	Courtesy of FORD MOTOR COMPANY	Ground

For DTC B1B50:12, measure:

Positive Lead	Measurement / Action	Negative Lead
Refer to C4010-2	Courtesy of FORD MOTOR COMPANY	Ground

Is any voltage present?

Yes	REPAIR the circuit in question.

GO to D4

D4 CHECK THE REAR PARKING AID SENSOR CIRCUITRY FOR A SHORT TOGETHER

Ignition OFF.

For DTC B1B44:12, measure:

Positive Lead	Measurement / Action	Negative Lead
Refer to C4011-2	Courtesy of FORD MOTOR COMPANY	Refer to C4011-1

For DTC B1B46:12, measure:

Positive Lead	Measurement / Action	Negative Lead
Refer to C4012-2	Courtesy of FORD MOTOR COMPANY	Refer to C4012-1

For DTC B1B48:12, measure:

Positive Lead	Measurement / Action	Negative Lead
Refer to C4009-2	Courtesy of FORD MOTOR COMPANY	Refer to C4009-1

For DTC B1B50:12, measure:

Positive Lead	Measurement / Action	Negative Lead
Refer to C4010-2	Courtesy of FORD MOTOR COMPANY	Refer to C4010-1

Is the resistance greater than 10, 000 ohms?

Yes	If all the sensors set a DTC, GO to D5 If one or more (but not all) parking aid sensor(s) recorded a DTC, INSTALL a new sensor(s) for the one in question. REFER to: Rear Parking Aid Sensor .

No	REPAIR the circuits in question.

D5 CHECK FOR CORRECT BCM (BODY CONTROL MODULE) OPERATION

Ignition OFF.

Disconnect and inspect all BCM 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 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 TSB addresses this concern, Refer to BCM GUIDED ROUTINE TESTING .

No	The system is operating correctly at this time. Concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.