Pinpoint Tests AK: The Headlamps On Warning Chime Is Inoperative

Instrumentation, Message Center and Warning Chimes

Pinpoint Test AK: The Headlamps On Warning Chime Is Inoperative

Normal Operation

The Smart Junction Box (SJB) receives the headlamp switch status from the headlamp switch. On vehicles equipped without Intelligent Access (IA), the SJB receives the LH front door ajar status from the LH front door ajar switch through hardwired circuitry. On vehicles equipped with IA, the Remote Function Actuator (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
- SJB
- IPC



PINPOINT TEST AK: THE HEADLAMPS ON WARNING CHIME IS INOPERATIVE

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AK1 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 AK2.

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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AK2 CHECK THE SAFETY BELT WARNING CHIME OPERATION


- Ignition OFF.
- Ignition ON.
- Monitor the safety belt warning chime when the ignition switch is transitioned from OFF to RUN for 6 seconds.
- Does the safety belt warning chime operate for approximately 6 seconds?

Yes
GO to AK3.

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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AK3 CHECK THE EXTERIOR LAMPS OPERATION


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

Yes
GO to AK4.

No
REFER to Lighting and Horns.

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AK4 CHECK THE DOOR AJAR MESSAGE CENTER 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 Body Control Systems. TEST the system for normal operation.

No
GO to Pinpoint Test S. Pinpoint Test S: The Anti-Theft Indicator Is Never/Always On

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