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

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 BCM C2280G (vehicles without active park assist).
- Disconnect PAM C4226A (vehicles with active park assist).
- Ignition ON.
Does the LED continue to illuminate?

Yes REPAIR the circuit.

No For vehicles without active park assist GO to D6 For vehicles with active park assist GO to D7

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

Ignition OFF.

Disconnect BCM C2280G (vehicles without active park assist).

Disconnect PAM C4226A (vehicles with active park assist).

Disconnect Active park assist switch C3466.

For vehicles without active park assist measure:

Positive Lead	Measurement / Action	Negative Lead
Refer to C3466-1	Courtesy of FORD MOTOR COMPANY	Refer to C2280G-34

For vehicles with active park assist measure:

Positive Lead	Measurement / Action	Negative Lead
Refer to C3466-1	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 BCM C2280G (vehicles without active park assist).

Disconnect PAM C4226A (vehicles with active park assist).

Disconnect Active park assist switch C3466.

Measure:

Positive Lead	Measurement / Action	Negative Lead
Refer to C3466-1	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 Active park assist switch C3466.

For vehicles without active park assist connect a fused jumper wire:

Positive Lead	Measurement / Action	Negative Lead
Refer to C2280G-34	Courtesy of FORD MOTOR COMPANY	Battery positive

For vehicles with active park assist 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	For vehicles without active park assist. REMOVE the fused jumper wire. GO to D6 For vehicles with active park assist. REMOVE the fused jumper wire. GO to D7

No	INSTALL a new active park assist switch. REFER to: Active Park Assist Switch .

D6 CHECK FOR CORRECT BCM (BODY CONTROL MODULE) OPERATION

Ignition OFF.

Disconnect and inspect all BCM 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. 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, Refer to BCM GUIDED ROUTINE TESTING

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.

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.