Audible Warning Device: Description and Operation

CHIME SYSTEM
The chime system is comprised of an audible chime located internal to the BCM; and is dependent on various inputs to the BCM to operate. These inputs to the BCM include key-in ignition switch, exterior lamps as well as requests for the Mechanical Instrument Cluster from the seat belt switch input or whenever certain indicators are turned ON.

CHIME/BUZZER
The chime warning/reminder system includes signals for fasten seat belts, certain warning indicators, exterior lamps left ON, key left in ignition and door ajar.

For diagnosis and testing, use the DRB III scan tool and the proper Body Diagnostic Procedures.

Door Ajar Chime
The BCM will sound an audible chime when the key is in the ignition and the drivers door is open. This is to prevent partial closing of vehicle doors.

An audible chime will sound when the vehicle begins to move and the transmission range indicator display will indicate DOOR.

Fasten Seat Belts
At power up, a seat belt lamp bulb check will be conducted by the instrument cluster. If the driver side seat belt buckle is unbuckled during the bulb check, an accompanying chime will sound within the duration of the bulb check.

Single Warning Chime
After bulb check at power-up, if any of the following indicators are still activated, the cluster will request a single chime from the BCM. ABS, Air Bag, Check Engine, Charging System, Engine Temperature, Low Fuel (after 10 sec. for accurate fuel info), and BRAKE (if speed is greater than 2 mph).

Exterior Lamps Left ON
An audible chime tone that indicates the exterior lamps were left ON.

Key Left In Ignition
An audible chime tone that indicates the key was left in ignition.