Pinpoint Tests AM: The Headlamps On Warning Chime Is Inoperative

Instrumentation, Message Center and Warning Chimes

Pinpoint Tests


Pinpoint Test AM: The Headlamps On Warning Chime Is Inoperative

Normal Operation

The Smart Junction Box (SJB) receives the headlamp switch status from the headlamp switch. The SJB 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 PARK 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 AM: THE HEADLAMPS ON WARNING CHIME IS INOPERATIVE

-------------------------------------------------
AM1 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 AM2.

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

-------------------------------------------------
AM2 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 AM3.

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

-------------------------------------------------
AM3 CHECK THE EXTERIOR LAMPS OPERATION


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

Yes
GO to AM4.

No
REFER to Lighting and Horns.

-------------------------------------------------
AM4 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 IPC message center.
- Does the door ajar 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 T. Pinpoint Test T: The Door Ajar Warning Indicator Is Never/Always On

-------------------------------------------------