Pinpoint Test B : DTC (Diagnostic Trouble Code) B129C:14, DTC (Diagnostic Trouble Code) B129D:14

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

B1 CHECK THE DIAGNOSTIC TROUBLE CODES (DTCS) FROM THE PAM (PARKING ASSIST CONTROL MODULE) SELF-TEST

Ignition ON.

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

Check the PAM Diagnostic Trouble Codes (DTCs) from the self-test.

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

Yes

GO to B2

No	* For DTC B129C:14 or DTC B129D:14 GO to B3 * For all other PAM Diagnostic Trouble Codes (DTCs), REFER to PAM DTC Chart .

B2 CHECK THE FRONT BUMPER WIRING HARNESS
- Inspect the front bumper wiring harness for opens, shorts, grounds or corrosion.
Is the front bumper wiring harness OK?

Yes GO to B3

No REPAIR or INSTALL a new front bumper wiring harness.

B3 CHECK THE SENSOR CIRCUITS FOR OPENS

Ignition OFF.

Disconnect suspect front active park assist sensor(s) C1607 (DTC B129C:14) or C1608 (DTC B129D:14).

Disconnect BCM C2280C.

Measure:

DTC B129C:14

Positive Lead	Measurement / Action	Negative Lead
C2280C-7	Courtesy of FORD MOTOR COMPANY	C1607-1
C2280C-11	Courtesy of FORD MOTOR COMPANY	C1607-2
C2280C-35	Courtesy of FORD MOTOR COMPANY	C1607-3

DTC B129D:14

Positive Lead	Measurement / Action	Negative Lead
C2280C-7	Courtesy of FORD MOTOR COMPANY	C1608-1
C2280C-1	Courtesy of FORD MOTOR COMPANY	C1608-2
C2280C-35	Courtesy of FORD MOTOR COMPANY	C1608-3

Are the resistances less than 3 ohms?

Yes

GO to B4

No	REPAIR the affected circuit(s).

B4 CHECK THE SENSOR SIGNAL RETURN CIRCUIT FOR A SHORT TO GROUND

Measure:

DTC B129C:14

Positive Lead	Measurement / Action	Negative Lead
C1607-2	Courtesy of FORD MOTOR COMPANY	Ground

DTC B129D:14

Positive Lead	Measurement / Action	Negative Lead
C1608-2	Courtesy of FORD MOTOR COMPANY	Ground

Is the resistance greater than 10, 000 ohms?

Yes

GO to B5

No	REPAIR the circuit.

B5 CHECK THE FRONT ACTIVE PARK ASSIST SENSOR
- Connect BCM C2280C.
- Install a known good front active park assist sensor for the suspect sensor. REFER to: Front Active Park Assist Sensors .
- Ignition ON.
- Using a diagnostic scan tool, clear the PAM Diagnostic Trouble Codes (DTCs).
- Perform the PAM self-test.
Is DTC B129C:14 or DTC B129D:14 still present?

Yes GO to B6

No INSTALL a new front active park assist sensor for the one in question. REFER to: Front Active Park Assist Sensors .

B6 CHECK FOR CORRECT BCM (BODY CONTROL MODULE) OPERATION

Ignition OFF.

Disconnect and inspect all BCM connectors 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 connectors 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 Technical Service Bulletins (TSBs) address this concern, Refer to BCM Guided Routine .

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