Asleep & Awake Functions
WARNING: This page is about a different car, the 2002 Pontiac Sunfire, 2002 Chevrolet Cavalier, 2001 Pontiac Sunfire, and 2001 Chevrolet Cavalier. However, it is still accessible from the selected car via links, so may be relevant.
Wake-up signals turn Body Control Module (BCM) on to begin controlling and/or monitoring certain functions. On 2001 models, BCM wake-up inputs include door ajar switches, ignition switch actuation, inadvertent power feedback, driver door lock and trunk release actuation. On 2002 models, BCM wake-up inputs are the same as 2001 models and also include headlamp actuation, key-in-ignition, parklamp actuation, and detection of battery disconnect and reconnect.
The BCM will sleep if there are no delay timers activated, no output commands, no serial 2 data activity, or ignition switch is in OFF position.