Principles of Operation

PRINCIPLES OF OPERATION

Door Ajar Chime
The door ajar chime feature is controlled by the smart junction box (SJB). The driver and passenger door ajar switches, and the liftgate are hardwired to the SJB. If any door or liftgate is sensed as being open, and the ignition switch is in RUN/START position, the SJB will process the input and sends a chime request to the instrument cluster over the controller area network (CAN).

Safety Belt Warning Chime
The safety belt chime feature is controlled by the restraints control module (RCM). The driver safety belt switch is hardwired to the RCM. The RCM communicates with the instrument cluster over a hardwire connection. If at any time during the first 6 seconds after the ignition switch is placed in RUN the driver safety belt is sensed as being unfastened, the RCM will process the input, and in turn, sends a chime request to the instrument cluster.

Headlamp-On Warning Chime
This function provides audible warning to the operator of the vehicle that the head/parking lamps are ON when the ignition is in the OFF position and the driver door is open. The headlamp-on warning chime sounds at twice the rate of the door ajar chime.

Key-In-Ignition Warning Chime
This function provides an audible warning that the key is left in the ignition switch while the vehicle is not running and the driver door is open.

Air Bag Warning Chime
The air bag warning chime function warns the driver that the air bag warning indicator lamp is not operating and a fault has occurred in the air bag system by sounding a chime when the ignition is in the RUN position.

Belt Minder

NOTE: The belt minder feature is configurable. If configuring using a diagnostic tool, refer to Module Communications Network (Information Bus). To configure without using a diagnostic tool, refer to Safety Belt Minder Deactivating/Activating.

The belt minder feature supplements the current safety belt warning function. The belt minder feature is enabled after the current safety belt warning is complete. If the driver safety belt is not buckled approximately 5 seconds after the safety belt warning light has been turned off, the belt minder reminds the driver that their safety belt is unbuckled by intermittently sounding a chime and illuminating the safety belt warning lamp in the instrument cluster. While activated, the belt minder alternates the chime and indicator from on for six seconds to off for 30 seconds.

The belt minder reminder stops when:
- the driver safety belt is buckled.
- the ignition is turned to OFF or ACCESSORY.
- 5 minutes have elapsed since belt minder has started.

Parking Brake Warning Chime
This function provides audible warning to the operator of the vehicle that the parking brake is ON when the ignition is in the RUN position, and the vehicle speed is above 5 km/h. The parking brake warning chime stops when:
- the parking brake is released.
- the ignition is turned to OFF or ACCESSORY
- vehicle speed is below 5 km/h.