Pinpoint Test BA: The Headlamps On Warning Chime Is Inoperative

Instrumentation, Message Center and Warning Chimes

Pinpoint Test BA: 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 (Smart Junction Box) 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 (Smart Junction Box) 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 (Smart Junction Box)

- IPC (Instrument Panel Cluster)

PINPOINT TEST BA : THE HEADLAMPS ON WARNING CHIME IS INOPERATIVE

BA1 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 BA2.

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

BA2 CHECK THE EXTERIOR LAMPS OPERATION

- Ignition OFF.

- Place the headlamp switch in the PARK position.

Do the parking lamps operate?

Yes
GO to BA3.

No
REFER to Lighting and Horns.

BA3 CHECK THE MESSAGE CENTER OPERATION

- Close all doors, hood and luggage compartment lid.

- Ignition ON.

- Open the driver door while monitoring the message center displays.

Does the message center display DRIVER DOOR AJAR?

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

No
GO to Pinpoint Test AA to diagnose the door/hood ajar warning indicator (non-hybrid) or GO to Pinpoint Test AR to diagnose the door ajar message center warning indicator (MKZ or hybrid). Pinpoint Test AR: The Door/hood Ajar Message Center Warning Indicator Is Never/Always On