Alero L4-144 2.4L DOHC VIN T SFI (2000)
The key-in-ignition alarm sounds at a rate of 150 tones per minute for 3 seconds, then switch to 18 tones per minute when the following conditions are
true:
^
The ignition switch is off.
^
The driver door is open.
^
The key-in-ignition input is active.
The alarm deactivates when any one of the above conditions changes.
Oil Life Reset
The oil life reset acknowledgment alarm sounds 5 tones, at a rate of 50 tones per minute when the cluster transmits an Engine Oil Fluid Remaining Life
Command=100% to the PCM.
Park Brake Warning
The Park Brake alarm sounds at a rate of 300 tones per minute when the following conditions are true:
^
The vehicle speed is greater than a calibrated speed.
^
The park brake switch indicates that the park brake is engaged.
The alarm deactivates when any one of the above conditions changes.
Seatbelt Not Fastened
The seatbelt-not-fastened alarm sounds at a rate of 50 tones per minute when the following conditions are true:
^
The ignition switch turned from off to on.
^
The seatbelt switch indicates that the seat belt is not fastened
^
A 6-second seatbelt chime timer has not expired
The alarm deactivates when any one of the above conditions changes.
Tire Inflation Reset
The tire inflation reset acknowledgement alarm sounds tones at a rate of 50 tones per minutewhen the low tire pressure reset report is sent out by the
EBCM.
Turn Signal
The turn signal-on alarm activates when ignition is active and the turn signal has been active for greater than 1.2 km (0.75 ml). The alarm synchronizes
with the turn signal flash rate.
Battery Rundown Protection
Battery Rundown Protection helps prevent the battery from deep discharge when you have inadvertently left the interior/courtesy lighting on (glove box
door open, door ajar, map light on, etc.). Battery Rundown Protection performs this function by turning off the inadvertent power output. This provides a
battery voltage for the interior/courtesy lighting.
Once the ignition switch is turned off, a time-out period begins. When the time-out expires, the inadvertent output is turned off. The length of time before
the timer expires depends on the accumulative vehicle mileage. If the mileage is under 24 km (5 mi), the vehicle is assumed to be in the plant or the
dealership lot, and the time out period of 3 minutes is used. If the accumulative mileage is greater than 24 km (15 mi), the vehicle is assumed to be in
the hands of the customer, and time out period of 20 minutes is used.
While the inadvertent power output is off, the inadvertent feed back is monitored. If a high to low transition occurs, or if a hardware/software wake up
occurs, the inadvertent output is turned back on and the timer is restarted.
Cruise Cancel
The Cruise Cancel Switch operates in the following manner. The BCM reads the cruise control cancel switch and determines when the switch is pressed.
The BCM transmits a Class 2 serial data message to the PCM to disable the cruise.
Driver Warning System
The BCM is responsible for interpreting most of the driver warnings. The remaining driver warning information is sent on to the instrument cluster in the
form of a Class 2 serial data bus message. The BCM sends the following messages to the instrument cluster:
^
SECURITY
^
LOW WASH
^
Low Engine Coolant
^
Low Oil Level
^
High Beam
^
Washer Fluid Level Low
^
SERVICE VEHICLE SOON
^
Door Ajar
