Pinpoint Test D: B1B44:14, B1B46:14, B1B48:14, B1B50:14

WARNING: This page is about a different car, the 2020 Lincoln Nautilus. 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 Diagnostic Trouble Codes (DTCs).

Are multiple rear parking aid sensor Diagnostic Trouble Codes (DTCs) recorded?

Yes

GO to D2

No	For DTC B1B44:14, B1B46:14, B1B48:14 or B1B50:14, GO to D3 For all other Diagnostic Trouble Codes (DTCs), refer to 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 OPENS

Disconnect: suspect parking aid sensor.

Disconnect: BCM C2280E.

For DTC B1B44:14, measure:

Positive Lead	Measurement / Action	Negative Lead
C2280E-26	Courtesy of FORD MOTOR COMPANY	C4011-1
C2280E-7	Courtesy of FORD MOTOR COMPANY	C4011-2
C2280E-27	Courtesy of FORD MOTOR COMPANY	C4011-3

For DTC B1B46:14, measure:

Positive Lead	Measurement / Action	Negative Lead
C2280E-26	Courtesy of FORD MOTOR COMPANY	C4012-1
C2280E-8	Courtesy of FORD MOTOR COMPANY	C4012-2
C2280E-27	Courtesy of FORD MOTOR COMPANY	C4012-3

For DTC B1B48:14, measure:

Positive Lead	Measurement / Action	Negative Lead
C2280E-26	Courtesy of FORD MOTOR COMPANY	C4009-1
C2280E-23	Courtesy of FORD MOTOR COMPANY	C4009-2
C2280E-27	Courtesy of FORD MOTOR COMPANY	C4009-3

For DTC B1B50:14, measure:

Positive Lead	Measurement / Action	Negative Lead
C2280E-26	Courtesy of FORD MOTOR COMPANY	C4010-1
C2280E-24	Courtesy of FORD MOTOR COMPANY	C4010-2
C2280E-27	Courtesy of FORD MOTOR COMPANY	C4010-3

Is resistance less than 3 ohms?

Yes

GO to D4

No	REPAIR the circuit.

D4 CHECK THE REAR PARKING AID SENSOR SIGNAL CIRCUITRY FOR SHORTS TO GROUND

For DTC B1B44:14, measure:

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

For DTC B1B46:14, measure:

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

For DTC B1B48:14, measure:

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

For DTC B1B50:14, measure:

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

Is the resistance greater than 10, 000 ohms?

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

No	REPAIR the circuit.

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 .

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.