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

WARNING: This page is about a different car, the 2021 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.

Refer to 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
IPMA 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.
IPMA 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 to battery voltage.

Possible Sources

Wiring, terminals or connectors
IPMA
Instrument panel center stack middle switch

E1 RETRIEVE THE DIAGNOSTIC TROUBLE CODES (DTCS) FROM THE IPMA (IMAGE PROCESSING MODULE A) SELF-TEST
- Ignition ON.
- Using a diagnostic scan tool, perform the IPMA self-test.
Is DTC B1B54:11 present?

Yes GO to E4

No If the LED is inoperative, GO to E3 If the LED is always on, GO to E2

E2 CHECK THE LED (LIGHT EMITTING DIODE) CIRCUIT FOR A SHORT TO VOLTAGE
- Ignition OFF.
- Disconnect IPMA C242A.
- Ignition ON.
Does the LED continue to illuminate?

Yes REPAIR the circuit.

No GO to E7

E3 CHECK THE LED (LIGHT EMITTING DIODE) CIRCUIT FOR AN OPEN

Ignition OFF.

Disconnect IPMA C242A.

Disconnect Instrument panel center stack middle switch C2039.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C2039-1	Courtesy of FORD MOTOR COMPANY	C242A-14

Is the resistance less than 3 ohms?

Yes

GO to E5

No	REPAIR the circuit.

E4 CHECK THE LED (LIGHT EMITTING DIODE) CIRCUIT FOR A SHORT TO GROUND

Ignition OFF.

Disconnect IPMA C242A.

Disconnect Instrument panel center stack middle switch C2039.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C2039-1	Courtesy of FORD MOTOR COMPANY	Ground

Is the resistance greater than 10, 000 ohms?

Yes

GO to E5

No	REPAIR the circuit.

E5 CHECK THE LED (LIGHT EMITTING DIODE) WITH THE IPMA (IMAGE PROCESSING MODULE A) BYPASSED

Connect Instrument panel center stack middle switch C2039.

Connect a fused jumper wire:

Positive Lead	Measurement / Action	Negative Lead
C242A-14	Courtesy of FORD MOTOR COMPANY	Battery positive

Does the LED illuminate?

Yes	REMOVE the fused jumper wire. GO to E7

GO to E6

E6 CHECK THE INSTRUMENT PANEL CENTER STACK MIDDLE SWITCH GROUND

Disconnect Instrument panel center stack middle switch C2039.

Measure

Positive Lead	Measurement / Action	Negative Lead
C2039-3	Courtesy of FORD MOTOR COMPANY	Ground

Is the resistance less than 3 ohms?

Yes	INSTALL a new Instrument panel center stack middle switch. REFER to: Active Park Assist Switch .

No	REPAIR the circuit.

E7 CHECK FOR CORRECT IPMA (IMAGE PROCESSING MODULE A) OPERATION

Ignition OFF.

Disconnect and inspect all IPMA 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 IPMA 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 IPMA. REFER to: Image Processing Module A (IPMA) .

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.