Operation CHARM: Car repair manuals for everyone.

Instrument Panel, Gauges and Warning Indicators: Description and Operation

WARNING DEVICES

The warning chime sounds to remind or alert the driver:
- to turn the headlamps off when exiting the vehicle.
- to remove the ignition key when exiting the vehicle.
- to fasten the safety belt after starting the vehicle.
- to turn the turn signals off.
- that a fault is present in the supplemental restraint system (SRS).
- that a warning message is displayed on the message center.
- that an engine coolant over temperature condition is present.

The lighting control module (LCM) controls the warning chime function using various inputs to determine when to sound the warning chime. The warning chime sounds if:
- the headlamps are on with the key removed from the ignition lock cylinder and the driver door ajar.
- the key is in the ignition lock cylinder in the OFF position and the driver door ajar.
- the vehicle travels with the turn signal on for more than 0.8 km (0.5 miles).
- the safety belts are not fastened and the ignition key is in the ON position.
- the ignition switch is in the ON position and an air bag warning chime request is received from the restraint control module (RCM).
- the message center displays a warning message.
- a fail safe cooling chime request message is received from the instrument cluster by a request from the powertrain control module (PCM).