Alero L4-144 2.4L DOHC VIN T SFI (2000)
Audible Warning Device: Description and Operation
Circuit Description
FASTEN BELTS CHIME
When the ignition switch is turned to the RUN or the START position, voltage is applied through the Ignition 1 positive voltage feed circuit to the
BCM. When the left front seat belt is unbuckled the seat belt switch input circuit grounds through the seatbelt switch. The fasten belts chime sounds
for 8 seconds.
KEY IN IGNITION CHIME
The Key In Ignition Warning chime sounds when the key is in the ignition, not in the ON or START position and the Drivers door is open. Inserting a
key in the ignition switch closes the ignition key warning switch, which applies a ground input to the Body Control Module (BCM). The BCM sounds
the key in ignition chime.
LAMP ON CHIME
In order for the Lamps on chime to be activated, the following needs to occur via BCM inputs:
^
The headlamp switch in HEAD or PARK position
^
The ignition switch in OFF or ACC position
^
The drivers door open
PARK BRAKE WARNING CHIME
The park brake warning chime activates when the Body Control Module (BCM) receives a ground signal from the park brake switch and a class 2
message from the Powertrain Control Module (PCM) indicating the vehicle speed is greater than 5 km/h (8 mph). The park brake warning chime will
also sound if the vehicle is in gear for at least 8 seconds with the park brake on.
INSPECT GAUGES CHIME
The check gauges chime sounds 3 notes every time one of the following indicators turns on and the engine has been running for more than 5 seconds:
^
Low Oil Pressure
^
High Temperature
^
Low Fuel Level
^
Brake Indicator via Serial Data Command
^
ABS
^
Service Engine Soon
^
Check Oil Level
^
Volts
^
Low Washer Fluid
^
Low Coolant Level
The check gauges chime sounds 3 tones at a rate of 300 tones per minute. The check gauges chime is not limited to once per ignition cycle for the
door ajar indicator when the transaxle is in Drive or Reverse. The chime sounds whenever the activating conditions occur throughout an ignition cycle.
