Pinpoint Test B: B1B57:11

WARNING: This page is about a different car, the 2019 Lincoln Nautilus. However, it is still accessible from the selected car via links, so may be relevant.

B1 CHECK THE FRONT BUMPER WIRING HARNESS
- Ignition OFF.
- Inspect the front bumper wiring harness for opens, shorts, grounds, or corrosion.
Is the front bumper wiring harness OK?

Yes GO to B2

No REPAIR or INSTALL a new bumper wiring harness.

B2 CHECK THE LHF (LEFT-HAND FRONT) OUTER PARKING AID SENSOR FOR AN INTERNAL SHORT
- Ignition OFF.
- Disconnect: LHF Front Outer Parking Aid Sensor C1428.
- Ignition ON.
- Using a diagnostic scan tool, clear the Diagnostic Trouble Codes (DTCs) and repeat the PAM self-test.
Is DTC B1B57:11 present?

Yes GO to B3

No INSTALL a new LHF outer parking aid sensor. REFER to: Front Parking Aid Sensor

B3 CHECK THE LHF (LEFT-HAND FRONT) INNER PARKING AID SENSOR FOR AN INTERNAL SHORT

Ignition OFF.

Disconnect: LHF Inner Parking Aid Sensor C1429.

Ignition ON.

Using a diagnostic scan tool, clear the Diagnostic Trouble Codes (DTCs) and repeat the PAM self-test.

Is DTC B1B57:11 present?

Yes	If the vehicle is equipped with active park assist, GO to B4 If the vehicle is NOT equipped with active park assist, GO to B6

No	INSTALL a new LHF inner parking aid sensor. REFER to: Front Parking Aid Sensor

B4 CHECK THE LHF (LEFT-HAND FRONT) ACTIVE PARK ASSIST SENSOR FOR AN INTERNAL SHORT

Ignition OFF.

Disconnect: LHF active park assist sensor C1607.

Ignition ON.

Using a diagnostic scan tool, clear the Diagnostic Trouble Codes (DTCs) and repeat the PAM self-test.

Is DTC B1B57:11 present?

Yes

GO to B5

No	INSTALL a new LHF front active park assist sensor. REFER to: Front Parking Aid Sensor

B5 CHECK THE RHF (RIGHT-HAND FRONT) ACTIVE PARK ASSIST SENSOR FOR AN INTERNAL SHORT
- Ignition OFF.
- Disconnect: RHF active park assist sensor C1608.
- Ignition ON.
- Using a diagnostic scan tool, clear the Diagnostic Trouble Codes (DTCs) and repeat the PAM self-test.
Is DTC B1B57:11 present?

Yes GO to B6

No INSTALL a new RHF active park assist sensor. REFER to: Front Parking Aid Sensor

B6 CHECK THE RHF (RIGHT-HAND FRONT) INNER PARKING AID SENSOR FOR AN INTERNAL SHORT
- Ignition OFF.
- Disconnect: RHF inner parking aid sensor C1430.
- Ignition ON.
- Using a diagnostic scan tool, clear the Diagnostic Trouble Codes (DTCs) and repeat the PAM self-test.
Is DTC B1B57:11 present?

Yes GO to B7

No INSTALL a new RHF inner parking aid sensor. REFER to: Front Parking Aid Sensor

B7 CHECK THE RHF (RIGHT-HAND FRONT) OUTER PARKING AID SENSOR FOR AN INTERNAL SHORT
- Ignition OFF.
- Disconnect: RHF Outer Parking Aid Sensor C1431.
- Ignition ON.
- Using a diagnostic scan tool, clear the Diagnostic Trouble Codes (DTCs) and repeat the PAM self-test.
Is DTC B1B57:11 present?

Yes GO to B8

No INSTALL a new RHF outer parking aid sensor. REFER to: Front Parking Aid Sensor

B8 CHECK THE FRONT PARKING AID SENSOR VOLTAGE SUPPLY CIRCUIT FOR A SHORT TO GROUND

Ignition OFF.

Disconnect: BCM C2280C.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C2280C-7	Courtesy of FORD MOTOR COMPANY	Ground

Is the resistance greater than 10, 000 ohms?

Yes

GO to B9

No	REPAIR the circuit.

B9 CHECK THE FRONT PARKING AID SENSOR VOLTAGE SUPPLY CIRCUIT AND GROUND CIRCUIT FOR A SHORT TOGETHER

Measure:

Positive Lead	Measurement / Action	Negative Lead
C2280C-7	Courtesy of FORD MOTOR COMPANY	C2280C-35

Is the resistance greater than 10, 000 ohms?

Yes

GO to B10

No	REPAIR the circuit.

B10 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.