Principles of Operation

PRINCIPLES OF OPERATION

Safety Belt Warning Chime
The safety belt warning chime warns that the safety belt is not fastened. The safety belt warning chime sounds when the driver safety belt is not fastened and the ignition key is turned to the ON or START position.

The safety belt warning chime stops sounding when:
- the safety belt is fastened.
- the ignition key is turned to the OFF or ACC position.
- the chime has sounded for 6 seconds.

The safety belt warning chime inputs are:
- the ignition switch START position (clutch pedal pressed).
- the ignition switch ON position.
- the driver safety belt switch.

The output is the instrument cluster chime.

Safety Belt Minder
The safety belt minder feature is configurable.Refer to Information Bus (Module Communications Network). To configure without a scan tool, refer to Safety Belt Minder Deactivating/Activating. Service and Repair

The safety belt minder feature supplements the current safety belt warning function. The safety belt minder feature is enabled after the current safety belt warning is complete. The safety belt minder reminds the driver that his/her safety belt is unbuckled by intermittently sounding a chime and illuminating the safety belt warning indicator in the instrument cluster once the vehicle speed has exceeded 4 km/h (3 mph). While activated, the safety belt minder alternates the chime and indicator from on for 6 seconds to off for 30 seconds.

The safety belt minder chime stops when:
- the driver safety belt is buckled.
- the ignition key is turned to the OFF or ACC position.
- five minutes have elapsed since the safety belt minder has started.

Door Ajar Warning Chime
The door ajar warning chime warns that a door is ajar. The door ajar warning chime is a single chime with a 1 second duration. The door ajar chime sounds when the driver or passenger door becomes ajar while the ignition switch is in the ON position.

The door ajar warning chime inputs are the:
- Ignition switch ON position
- Door ajar switches

The output is the instrument cluster chime.

Air Bag Warning Chime
The air bag warning chime warns the driver that the air bag warning indicator lamp is not working and a fault has occurred by sounding a chime when the ignition switch is in the ON position for more than 20 seconds. When these conditions exist, the restraints control module (RCM) sends a chime request to the instrument cluster. The instrument cluster then activates the warning chime. The warning consists of 5 sets of 5 one second tone bursts. Each set is separated by 5 seconds of silence. The warning is repeated every 30 minutes.

Parking Brake Engaged Chime
The parking brake engaged chime reminds the driver that the parking brake is engaged by intermittently sounding a chime and illuminating the brake warning indicator in the instrument cluster once the vehicle speed has exceeded 4 km/h (3 mph).

Key-In-Ignition Warning Chime
The key-in-ignition warning chime warns that the key is in the ignition lock cylinder when the driver door is ajar. The key-in-ignition warning chime sounds when all the following conditions are met:
- Driver door is ajar.
- Key is in the ignition lock cylinder.
- Ignition switch is in the OFF or ACC position.

The key-in-ignition warning chime stops sounding when the:
- driver door is closed.
- key is removed from the ignition lock cylinder.
- ignition key is turned to the ON position.

The key-in-ignition warning chime inputs are the:
- Ignition switch ON position.
- Ignition switch ACC position.
- Key-in-ignition switch.
- LH door ajar switch.

The output is the instrument cluster chime.

Headlamp On Warning Chime
The headlamp on warning chime warns that the headlamps are on while the driver door is ajar. The headlamp on warning chime sounds when all the following conditions are met:
- Driver door is ajar.
- Headlamp switch is in the PARKING LAMPS or HEADLAMPS position.
- Ignition switch is in the OFF position.
- Key is out of the ignition lock cylinder.

The headlamp on warning chime stops sounding when any one of the conditions above are removed.

The headlamp on warning chime inputs are the:
- Ignition switch in the OFF position.
- Headlamp switch.
- Driver door ajar switch.
- Key-in-ignition switch.

The output is the instrument cluster chime.