Principles of Operation (How Does it Work?)

Safety Belt Warning Chime
The safety belt warning chime is activated in the Generic Electronic Module (GEM) when the ignition switch is in the RUN position and the GEM detects an unbuckled driver safety belt. The duration of the chime is six seconds or until the safety belt is buckled.

Belt Minder

NOTE: The belt minder feature is configurable. To configure without using a diagnostic tool, refer to 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. 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 once the vehicle speed has exceeded 3 mph (5 kph). While activated, the belt minder alternates the chime and indicator from ON for 6 seconds to OFF for 30 seconds.

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

Air Bag Warning Chime
The air bag warning chime is activated when the air bag warning lamp is inoperative and an active fault is detected by the Restraint Control Module (RCM). The air bag warning chime will sound after the ignition switch has been in the RUN position for more than 20 seconds. When these conditions exist, the RCM sends a chime request through the air bag warning chime request circuit to the generic electronic module (GEM). The GEM will activate the air bag warning chime. The warning consists of five sets of five one-second tone bursts. Each set is separated by five seconds of silence. The warning is repeated every 30 minutes.

Key-In-Ignition Warning Chime
When the key-in-ignition warning switch closes, it provides an input to the generic electronic module (GEM), which then sounds a warning chime, provided that the ignition switch is OFF and the driver door is open. The GEM will sound a steady tone, which will continue unless the key is removed, the ignition switch is rotated to the RUN position or the driver door is closed.

Headlamps Left On Warning Chime
The headlamp chime is activated when the generic electronic module (GEM) detects voltage at the headlamp ON or park ON input to the GEM, the ignition switch is in the OFF position, and the driver door is ajar.

Message Center Warning Chime
The message center warning chime will accompany any initial warning message display, as well as any initial warning message redisplay. As the message center is an integral part of the instrument cluster, the instrument cluster sends a chime request through the chime request circuit to the generic electronic module (GEM).

The message center switch depression tone sounds when any switch on the message center is depressed. The message center switches are supplied with a five-volt reference signal from the instrument cluster. When a switch is depressed, it completes a circuit through a specific resistor in the switch assembly and back to the instrument cluster. The instrument cluster determines that a switch has been depressed and sends a chime request through the chime request circuit to the generic electronic module (GEM).

Door Ajar Warning Chime
When any door is opened, it opens a normally grounded switch, which opens the door ajar input to the central security module (CSM). The CSM then sends a door ajar chime request to the generic electronic module (GEM) over the UART Based Protocol (UBP) network. With the ignition switch in the RUN position the GEM activates a one second tone.