Pinpoint Test A : DTC (Diagnostic Trouble Code) B129C:12, DTC (Diagnostic Trouble Code) B129D:12

NOTE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may cause damage to the connector. Use only Rotunda Flex Probes (NUD105-R025D)

A1 RETRIEVE 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 A2

No For DTC B129C:12 or DTC B129D:12 GO to A3For all other PAM Diagnostic Trouble Codes (DTCs), REFER to: Parking Aid

A2 CHECK THE BUMPER WIRING HARNESS
- Inspect the bumper wiring harness for opens, shorts, grounds, or corrosion.
Is the bumper wiring harness OK?

Yes GO to A3

No REPAIR or INSTALL a new bumper wiring harness.

A3 CHECK THE SENSOR RETURN CIRCUITS FOR A SHORT TO VOLTAGE

Ignition OFF.

Disconnect Suspect Active Park Assist Sensor(s) C1607 (DTC B129C:12) or C1608 (DTC B129D:12).

Disconnect PAM C4014B .

Ignition ON.

Measure:

DTC B129C:12

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

DTC B129D:12

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

Is any voltage present?

Yes	REPAIR the circuit in question.

GO to A4

A4 CHECK THE SENSOR VOLTAGE SUPPLY AND SIGNAL RETURN CIRCUITS FOR A SHORT TOGETHER

Ignition OFF.

Measure:

DTC B129C:12

Positive Lead	Measurement / Action	Negative Lead
C1607-2	Courtesy of FORD MOTOR COMPANY	C1607-1

DTC B129D:12

Positive Lead	Measurement / Action	Negative Lead
C1608-2	Courtesy of FORD MOTOR COMPANY	C1608-1

Is the resistance greater than 10, 000 ohms?

Yes

GO to A5

No	REPAIR the affected circuits.

A5 CHECK THE ACTIVE PARK ASSIST SENSOR
- Connect PAM C4014B .
- Ignition ON.
- Using a diagnostic scan tool, clear the PAM Diagnostic Trouble Codes (DTCs) and repeat the self-test.
Is DTC B129C:12 or DTC B129D:12 still present?

Yes GO to A6

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

A6 CHECK FOR CORRECT PAM (PARKING ASSIST CONTROL MODULE) OPERATION

Ignition OFF.

Disconnect and inspect all PAM 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 PAM 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 TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new PAM. REFER to: Parking Assist Control Module (PAM) - 4-Door REFER to: Parking Assist Control Module (PAM) - 5-Door

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.