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

Normal Operation and Fault Conditions

The PAM supplies voltage to the parking aid switch status LED when the parking aid system is disabled.

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 in the PAM when the parking aid switch status LED circuit is shorted to ground.
PAM B1B54: 15	Function LED - Park Aid: Circuit Short To Battery Or Open	A continuous and on-demand DTC that sets in the PAM when the parking aid switch status LED circuit is shorted to battery voltage or is open.

Possible Sources

Wiring, terminals or connectors
Parking aid disable switch
PAM

J1 CHECK THE PAM (PARKING ASSIST CONTROL MODULE) CONTINUOUS AND ON-DEMAND DIAGNOSTIC TROUBLE CODES (DTCS)
- Ignition ON
- Using a diagnostic scan tool, clear the PAM Diagnostic Trouble Codes (DTCs).
- Perform the PAM self-test
Is DTC B1B54: 11 or B1B54: 15 still present?

Yes GO to J2

No If the LED is inoperative GO to J6If the LED is always on GO to J4

J2 CHECK THE PAM (PARKING ASSIST CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS) WITH THE PARKING AID DISABLE SWITCH DISCONNECTED
- Ignition OFF.
- Disconnect: Steering Column Multifunction Switch C202.
- Ignition ON.
- Using a diagnostic scan tool, clear the PAM Diagnostic Trouble Codes (DTCs).
- Perform the PAM self-test.
Is DTC B1B54: 11 or B1B54: 15 still present?

Yes GO to J3

No INSTALL a new steering column multifunction switch.

J3 CHECK THE PARKING AID SWITCH STATUS LED (LIGHT EMITTING DIODE) CIRCUIT FOR A SHORT TO GROUND

Ignition OFF.

Disconnect: PAM C4014A.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C4014A-4	Courtesy of FORD MOTOR COMPANY	Ground

Is the resistance greater than 10, 000 ohms?

Yes

GO to J4

No	Repair the circuit.

J4 CHECK THE PARKING AID SWITCH STATUS LED (LIGHT EMITTING DIODE) CIRCUIT FOR A SHORT TO VOLTAGE
- Ignition OFF.
- Disconnect: PAM C4014A.
- Ignition ON.
Does the parking aid switch status LED continue to illuminate?

Yes GO to J5

No GO to J8

J5 CHECK FOR VOLTAGE ON THE PARKING AID SWITCH STATUS LED (LIGHT EMITTING DIODE) CIRCUIT

Disconnect: Steering Column Multifunction Switch C202.

Measure:

Positive Lead	Measurement / Action	Negative Lead
Refer to C202-6	Courtesy of FORD MOTOR COMPANY	Ground

Is any voltage present?

Yes	Repair the circuit.

No	INSTALL a new steering column multifunction switch.

J6 CHECK THE PARKING AID SWITCH STATUS LED (LIGHT EMITTING DIODE) CIRCUIT FOR AN OPEN

Ignition OFF.

Disconnect: PAM C4014A.

Measure:

Positive Lead	Measurement / Action	Negative Lead
Refer to C202-6	Courtesy of FORD MOTOR COMPANY	C4014A-4

Is the resistance less than 3 ohms?

Yes

GO to J7

No	REPAIR the circuit.

J7 CHECK THE PARKING AID SWITCH GROUND CIRCUIT FOR AN OPEN

Measure:

Positive Lead	Measurement / Action	Negative Lead
Refer to C202-1	Courtesy of FORD MOTOR COMPANY	Ground

Is the resistance less than 3 ohms?

Yes

GO to J8

No	REPAIR the circuit.

J8 CHECK FOR CORRECT PAM (PARKING ASSIST CONTROL MODULE) OPERATION

Ignition OFF.

Disconnect and inspect all PAM 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 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, INSTALL a new PAM. REFER to: Parking Assist Control Module (PAM) .

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.