Pinpoint Test F : The Parking Aid Switch Function Led (Light Emitting Diode) Is Inoperative Or Always On

Refer to Parking Aid for schematic and connector information.

Normal Operation and Fault Conditions

The PAM supplies voltage to the parking aid disable switch LED when the parking aid system has been disabled using the switch.

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Condition
PAM B1B54:11	Function LED - Park Aid: Circuit Short To Ground	A continuous and on-demand DTC that sets when the parking aid disable status LED circuit is shorted to ground.
PAM B1B54:12	Function LED - Park Aid: Circuit Short To Battery	A continuous and on-demand DTC that sets when the parking aid disable status LED circuit is shorted battery voltage.

Possible Sources

Wiring, terminals or connectors
Parking aid disable switch
PAM

F1 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.
Is DTC B1B54:11 present?

Yes GO to F5

No If the LED is inoperative, GO to F3 If the LED is always on, GO to F2

F2 CHECK THE LED (LIGHT EMITTING DIODE) SUPPLY CIRCUIT FOR A SHORT TO VOLTAGE
- Ignition OFF.
- Disconnect PAM C4014A.
- Ignition ON.
Does the LED continue to illuminate?

Yes REPAIR the circuit.

No GO to F7

F3 CHECK THE LED (LIGHT EMITTING DIODE) SUPPLY CIRCUIT FOR AN OPEN

Ignition OFF.

Disconnect Parking Aid Switch C2035.

Disconnect PAM C4014A.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C2035-1	Courtesy of FORD MOTOR COMPANY	C4014A-13

Is the resistance less than 3 ohms?

Yes

GO to F4

No	REPAIR the circuit.

F4 CHECK THE LED (LIGHT EMITTING DIODE) GROUND CIRCUIT FOR AN OPEN

Measure:

Positive Lead	Measurement / Action	Negative Lead
C2035-5	Courtesy of FORD MOTOR COMPANY	Ground

Is the resistance less than 3 ohms?

Yes

GO to F6

No	REPAIR the circuit.

F5 CHECK THE LED (LIGHT EMITTING DIODE) SUPPLY CIRCUIT FOR A SHORT TO GROUND

Ignition OFF.

Disconnect PAM C4014A.

Disconnect Parking Aid Switch C2035.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C2035-1	Courtesy of FORD MOTOR COMPANY	Ground

Is the resistance greater than 10, 000 ohms?

Yes

GO to F6

No	REPAIR the circuit.

F6 CHECK THE LED (LIGHT EMITTING DIODE) WITH THE PAM (PARKING ASSIST CONTROL MODULE) BYPASSED

Connect Parking Aid Switch C2035.

Ignition ON.

Connect:

Positive Lead	Measurement / Action	Negative Lead
C4014A-1	Courtesy of FORD MOTOR COMPANY	C4014A-13

Does the LED illuminate?

Yes

GO to F7

No	INSTALL a new parking aid switch. REFER to: Parking Aid Switch .

F7 CHECK FOR CORRECT PAM (PARKING ASSIST CONTROL MODULE) OPERATION

Ignition OFF.

Disconnect and inspect the PAM 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. 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) .

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.