Pinpoint Tests 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 Remote Function Actuator (RFA) module over the Medium Speed Controller Area Network (MS-CAN) bus. The RFA module receives 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 PARKING LAMP or HEADLAMP ON position. The SJB communicates the headlamp on chime request to the Instrument Panel Cluster (IPC) 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 concern
- SJB
- IPC

PINPOINT TEST AI: THE HEADLAMPS ON WARNING CHIME IS INOPERATIVE

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AI1 CARRY OUT THE CHIME FUNCTION ACTIVE COMMAND

- Ignition ON.
- Enter the following diagnostic mode on the scan tool: IPC DataLogger.
- Select the IPC chime command (SOUNDER_OUT).
- Scroll through the chimes to select Lights On chime.
- Does the headlamps on chime operate?

Yes
GO to AI2.

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

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AI2 CHECK THE EXTERIOR LAMPS OPERATION

- Ignition OFF.
- Place the headlamp switch in the PARKING LAMP position.
- Do the parking lamps operate?

Yes
GO to AI3.

No
REFER to Exterior Lighting Testing and Inspection.

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AI3 CHECK THE DOOR AJAR WARNING INDICATOR OPERATION

- Ignition ON.
- Open then close the LH front door while observing the door ajar message center warning indicator in the IPC message center.
- Does the door ajar message center warning indicator operate correctly?

Yes
INSTALL a new SJB. REFER to Multifunction Electronic Modules Smart Junction Box (SJB). TEST the system for normal operation.

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

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