Pinpoint Test AI: The Headlamps On Warning Chime Is Inoperative

Instrumentation, Message Center and Warning Chimes

Pinpoint Test AI: The Headlamps On Warning Chime Is Inoperative

Normal Operation

The Smart Junction Box (SJB) receives the headlamp switch status from the headlamp switch and the LH front door ajar status from the LH front door ajar switch through hardwired circuitry. The headlamps on warning chime sounds when the LH front door is opened with the ignition switch in the OFF position, no key-in-ignition input, and the headlamp switch is in the PARK or HEADLAMP ON position. The SJB (Smart Junction Box) communicates the headlamp on chime request to the Instrument Cluster (IC) over the Medium Speed Controller Area Network (MS-CAN) communication bus. The autolamps feature must not be selected for the headlamps on warning chime to operate.

This pinpoint test is intended to diagnose the following:

- Door ajar indication

- SJB (Smart Junction Box)

- IC (Instrument Cluster)

PINPOINT TEST AI : THE HEADLAMPS ON WARNING CHIME IS INOPERATIVE

AI1 CARRY OUT THE CHIME FUNCTION ACTIVE COMMAND

- Ignition ON.

- Enter the following diagnostic mode on the scan tool: IC (Instrument Cluster) DataLogger.

- Select the IC (Instrument Cluster) chime command (CHIME_H_LMP).

Does the chime operate?

Yes
GO to AI2.

No
INSTALL a new IC (Instrument Cluster). REFER to Instrument Cluster (IC) . TEST the system for normal operation.

AI2 CHECK THE HEADLAMP OPERATION

- Ignition OFF.

- Place the headlamp switch in the HEADLAMP position.

Do the headlamps operate?

Yes
GO to AI3.

No
REFER to Lighting and Horns.

AI3 CHECK THE DOOR AJAR WARNING INDICATOR OPERATION

- Ignition ON.

- Open then close the LH front door while observing the door ajar warning indicator in the IC (Instrument Cluster).

Does the door ajar warning indicator operate correctly?

Yes
INSTALL a new SJB (Smart Junction Box). TEST the system for normal operation.

No
GO to Pinpoint Test R. Pinpoint Test R: The Door Ajar Warning Indicator Is Never/Always On