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

Parking Aid for schematic and connector information.

Normal Operation and Fault Conditions

REFER to: Parking Aid - System Operation and Component Description .

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

Possible Sources

Wiring, terminals or connectors
PAM
Auto-start-stop-deactivation switch

D1 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 D4

No If the LED is inoperative, GO to D3 If the LED is always on, GO to D2

D2 CHECK THE LED (LIGHT EMITTING DIODE) CIRCUIT FOR A SHORT TO VOLTAGE
- Ignition OFF.
- Disconnect PAM C4226A.
- Ignition ON.
Does the LED continue to illuminate?

Yes REPAIR the circuit.

No GO to D7

D3 CHECK THE LED (LIGHT EMITTING DIODE) CIRCUIT FOR AN OPEN

Ignition OFF.

Disconnect PAM C4226A.

Disconnect auto-start-stop-deactivation switch C3010.

Measure:

Positive Lead	Measurement / Action	Negative Lead
Refer to C3010-7	Courtesy of FORD MOTOR COMPANY	Refer to C4226A-4

Is the resistance less than 3 ohms?

Yes

GO to D5

No	REPAIR the circuit.

D4 CHECK THE LED (LIGHT EMITTING DIODE) CIRCUIT FOR A SHORT TO GROUND

Ignition OFF.

Disconnect PAM C4226A.

Disconnect auto-start-stop-deactivation switch C3010.

Measure:

Positive Lead	Measurement / Action	Negative Lead
Refer to C3010-7	Courtesy of FORD MOTOR COMPANY	Ground

Is the resistance greater than 10, 000 ohms?

Yes

GO to D5

No	REPAIR the circuit.

D5 CHECK THE LED (LIGHT EMITTING DIODE) WITH THE PAM (PARKING ASSIST CONTROL MODULE) BYPASSED

Connect auto-start-stop-deactivation switch C3010.

Connect a fused jumper wire:

Positive Lead	Measurement / Action	Negative Lead
Refer to C4226A-4	Courtesy of FORD MOTOR COMPANY	Battery positive

Does the LED illuminate?

Yes	REMOVE the fused jumper wire. GO to D7

GO to D6

D6 CHECK THE AUTO-START-STOP-DEACTIVATION SWITCH GROUND

Disconnect auto-start-stop-deactivation switch C3010.

Measure

Positive Lead	Measurement / Action	Negative Lead
Refer to C3010-12	Courtesy of FORD MOTOR COMPANY	Ground

Is the resistance less than 3 ohms?

Yes	INSTALL a new auto-start-stop-deactivation switch.

No	REPAIR the circuit.

D7 CHECK FOR CORRECT PAM (PARKING ASSIST CONTROL MODULE) OPERATION

Ignition OFF.

Disconnect and inspect all 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 service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address 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.