Pinpoint Test C: DTC P254F:00

Anti-Theft

Pinpoint Test C: DTC P254F:00

Refer to Wiring Diagram Set 117, Remote Keyless Entry and Alarm for schematic and connector information Electrical Diagrams.

When the alarm system is armed, the Body Control Module (BCM) monitors the hood ajar switch. If the hood is opened while the alarm is armed, the hood ajar switch removes ground from the signal circuit. This signals the BCM (Body Control Module) that an unauthorized intrusion to the engine compartment has occurred and the perimeter alarm is activated.

- DTC P254F:00 (Engine Hood Switch Circuit / Open: No Sub Type Information)- an on-demand DTC that sets when the BCM (Body Control Module) detects an open in the hood switch circuit during the self-test. This DTC sets if the hood is open during a self-test

This pinpoint test is intended to diagnose the following:

- Wiring, terminals or connectors

- Hood switch

- BCM (Body Control Module)

PINPOINT TEST C : DTC P254F:00

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

C1 CHECK THE HOOD SWITCH

- Disconnect: Hood Switch C127.

- Connect a fused jumper wire between the hood switch C127-2, circuit CPL25 (BU/OG), harness side and the hood switch C127-1, circuit GD187 (BK/GN), harness side.





- Clear the BCM (Body Control Module) DTCs.

- Repeat the BCM (Body Control Module) self-test.

Is the BCM (Body Control Module) DTC P254F:00 retrieved?

Yes
REMOVE the jumper wire. GO to C2.

No
REMOVE the jumper wire. INSTALL a new hood latch. TEST the system for normal operation.

C2 CHECK THE HOOD SWITCH GROUND CIRCUIT

- Connect a fused jumper wire between the hood switch C127-2, circuit CPL25 (BU/OG), harness side and ground.





- Clear the BCM (Body Control Module) DTCs.

- Repeat the BCM (Body Control Module) self-test.

Is the BCM (Body Control Module) DTC P254F:00 retrieved?

Yes
GO to C3.

No
REPAIR circuit GD187 (BK/GN) for an open. TEST the system for normal operation.

C3 CHECK THE HOOD SWITCH SIGNAL CIRCUIT FOR AN OPEN

- Ignition OFF.

- Disconnect: BCM (Body Control Module) C2280D.

- Measure the resistance between the hood switch C127-2, circuit CPL25 (BU/OG), harness side and the BCM (Body Control Module) C2280D-12, circuit CPL25 (BU/OG), harness side.





Is the resistance less than 5 ohms?

Yes
GO to C4.

No
REPAIR circuit CPL25 (BU/OG) for an open. CLEAR the DTCs. REPEAT the self-test.

C4 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.