Pinpoint Test W: One Or More Parking, Rear Or License Plate Lamps Is Inoperative

Parking, Rear and License Plate Lamps

Pinpoint Test W: One Or More Parking, Rear or License Plate Lamps Is Inoperative

Refer to Wiring Diagram Set 92, Parking, Rear and License Lamps for schematic and connector information Electrical Diagrams.

Normal Operation

The Front Lighting Control Module (FLM) sends a message over the High Speed Controller Area Network (HS-CAN) to the BCM (Body Control Module) to indicate the headlamp switch position. When the BCM (Body Control Module) receives a message from the FLM (Front Lighting Control Module) indicating a request for the parking lamps, the BCM (Body Control Module) provides voltage to the parking lamps through 2 circuits.

If the BCM (Body Control Module) receives a message from the FLM (Front Lighting Control Module) indicating a fault with the headlamp switch or the BCM (Body Control Module) loses communication with the FLM (Front Lighting Control Module), the BCM (Body Control Module) defaults the exterior lamps on.

This pinpoint test is intended to diagnose the following:

- Fuse

- Wiring, terminals or connectors

- Bulb socket

- Headlamp assembly

- Front auxiliary parking lamp (Edge)

- Rear lamp assembly (MKX)

- Liftgate lamp (MKX)

- BCM (Body Control Module)

PINPOINT TEST W : ONE OR MORE PARKING, REAR OR LICENSE PLATE LAMPS IS INOPERATIVE

NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

W1 DETERMINE IF ALL THE PARKING LAMPS ARE INOPERATIVE

- Ignition OFF.

- Place the headlamp switch in the PARKING LAMPS ON position.

Are all the parking lamps inoperative?

Yes
GO to W7.

No
If all the rear parking lamps are inoperative, VERIFY the BCM (Body Control Module) fuse 40 (10A) is OK. If OK, GO to W2. If not OK, REFER to the Wiring Diagrams to identify the possible causes of the circuit short Electrical Diagrams.

If all the front parking lamps are inoperative, VERIFY the BCM (Body Control Module) fuse 30 (15A) is OK. If OK, GO to W3. If not OK, REFER to the Wiring Diagrams to identify the possible causes of the circuit short Electrical Diagrams.

For any other inoperative lamp, GO to W4.

W2 BYPASS THE BCM (Body Control Module) (REAR PARKING LAMPS)

NOTE: If the fuse in the jumper wire fails, refer to the Wiring Diagrams to identify the possible causes of the circuit short Electrical Diagrams.

- Place the headlamp switch in the OFF position.

- Disconnect: BCM (Body Control Module) C2280D.

- Connect a fused jumper wire between the positive battery terminal and the BCM (Body Control Module) C2280D-18, circuit CBP40 (YE/GN), harness side.






Do the rear parking lamps illuminate?

Yes
REMOVE the jumper wire. GO to W7.

No
REMOVE the jumper wire. REPAIR circuit CBP40 (YE/GN) for an open. TEST the system for normal operation.

W3 BYPASS THE BCM (Body Control Module) (FRONT PARKING LAMPS)

NOTE: If the fuse in the jumper wire fails, refer to the Wiring Diagrams to identify the possible causes of the circuit short Electrical Diagrams.

- Place the headlamp switch to the OFF position.

- Disconnect: BCM (Body Control Module) C2280E.

- Connect a fused jumper wire between the positive battery terminal and the BCM (Body Control Module) C2280E-6, circuit CBP30 (YE/BU), harness side.






Do the front parking lamps illuminate?

Yes
REMOVE the jumper wire. GO to W7.

No
REMOVE the jumper wire. REPAIR circuit CBP30 (YE/BU) for an open. TEST the system for normal operation.

W4 CHECK FOR VOLTAGE TO THE INOPERATIVE PARKING LAMP

- Place the headlamp switch in the OFF position.

- Disconnect: Inoperative Lamp.

- Place the headlamp switch in the PARKING LAMPS ON position.

- Measure the voltage between the inoperative lamp, harness side and ground as follows:

Edge

Inoperative Lamp Connector-Pin Circuit LH front C1023-2 CBP30 (YE/BU) RH front C1043-2 CBP30 (YE/BU) LH front side marker (headlamp assembly) C1021A-1 CBP30 (YE/BU) RH front side marker (headlamp assembly) C1041A-1 CBP30 (YE/BU) LH front auxiliary C1445-1 CBP30 (YE/BU) RH front auxiliary C1446-1 CBP30 (YE/BU) LH rear C414-4 CBP40 (YE/GN) RH rear C417-4 CBP40 (YE/GN) License plate C4353-1 CBP40 (YE/GN)

MKX

Inoperative Lamp Connector-Pin Circuit LH front C1115-2 CBP30 (YE/BU) RH front C1116-2 CBP30 (YE/BU) LH front side marker (headlamp assembly) C1021A-1 CBP30 (YE/BU) RH front side marker (headlamp assembly) C1041A-1 CBP30 (YE/BU) LH rear C414-4 CBP40 (YE/GN) RH rear C417-4 CBP40 (YE/GN) LH liftgate C4354-1 CBP40 (YE/GN) RH liftgate C4352-1 CBP40 (YE/GN) LH license plate C452-1 CBP40 (YE/GN) RH license plate C462-1 CBP40 (YE/GN)

Is the voltage greater than 10 volts?

Yes
GO to W5.

No
REPAIR the parking lamp voltage supply circuit in question for an open. TEST the system for normal operation.

W5 CHECK THE INOPERATIVE PARKING LAMP GROUND CIRCUIT FOR AN OPEN

- Measure the voltage between the inoperative lamp, harness side as follows:

Edge

Inoperative Lamp Connector-Pin Circuit Connector-Pin Circuit LH front C1023-2 CBP30 (YE/BU) C1023-1 GD120 (BK/GN) RH front C1043-2 CBP30 (YE/BU) C1043-1 GD123 (BK/GY) LH front side marker (headlamp assembly) C1021A-1 CBP30 (YE/BU) C1021A-6 GD120 (BK/GN) RH front side marker (headlamp assembly) C1041A-1 CBP30 (YE/BU) C1041A-6 GD123 (BK/GY) LH front auxiliary C1445-1 CBP30 (YE/BU) C1445-2 GD120 (BK/GN) RH front auxiliary C1446-1 CBP30 (YE/BU) C1446-2 GD123 (BK/GY) LH rear C414-4 CBP40 (YE/GN) C414-1 GD149 (BK/GY) RH rear C417-4 CBP40 (YE/GN) C417-1 GD151 (BK/GN) License plate C4353-1 CBP40 (YE/GN) C4353-2 GD149 (BK/GY)

MKX

Inoperative Lamp Connector-Pin Circuit Connector-Pin Circuit LH front C1115-2 CBP30 (YE/BU) C1115-1 GD120 (BK/GN) RH front C1116-2 CBP30 (YE/BU) C1116-1 GD123 (BK/GY) LH front side marker (headlamp assembly) C1021A-1 CBP30 (YE/BU) C1021A-6 GD120 (BK/GN) RH front side marker (headlamp assembly) C1041A-1 CBP30 (YE/BU) C1041A-6 GD123 (BK/GY) LH rear C414-4 CBP40 (YE/GN) C414-1 GD149 (BK/GY) RH rear C417-4 CBP40 (YE/GN) C417-1 GD151 (BK/GN) LH liftgate C4354-1 CBP40 (YE/GN) C4354-2 GD149 (BK/GY) RH liftgate C4352-1 CBP40 (YE/GN) C4352-2 GD149 (BK/GY) LH license plate C452-1 CBP40 (YE/GN) C452-2 GD149 (BK/GY) RH license plate C462-1 CBP40 (YE/GN) C462-2 GD149 (BK/GY)

Is the voltage greater than 10 volts?

Yes
For an MKX rear lamp, GO to W6.

For an Edge rear lamp, REPAIR or INSTALL a new rear lamp jumper harness. TEST the system for normal operation.

For an Edge license plate lamp, REPAIR or INSTALL a new license plate lamp jumper harness. TEST the system for normal operation.

For any other lamp, INSTALL a new bulb socket, auxiliary front parking lamp or headlamp assembly in question. TEST the system for normal operation.

No
REPAIR the ground circuit in question for an open. TEST the system for normal operation.

W6 CHECK THE REAR LAMP JUMPER HARNESS FOR AN OPEN

- Inspect the rear lamp jumper harness for an open.

Is the jumper harness OK?

Yes
INSTALL a new rear lamp assembly. REFER to Rear Lamp Assembly . TEST the system for normal operation.

No
REPAIR or INSTALL a new rear lamp jumper harness. TEST the system for normal operation.

W7 CHECK FOR CORRECT BCM (Body Control Module) OPERATION

- Disconnect all the BCM (Body Control Module) connectors.

- Check for:
- corrosion

- damaged pins

- pushed-out pins


- Connect all the BCM (Body Control Module) connectors and make sure they seat correctly.

- Operate the system and verify the concern is still present.

Is the concern still present?

Yes
INSTALL a new BCM (Body Control Module). TEST the system for normal operation.

No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.