C 1500 Truck 2WD V6-4.3L VIN W (2001)
![background image](/gmc/c_1500_truck_2wd/v6-4.3l_vin_w/Page-3201001.png)
Body Control Module: Description and Operation
Wake-Up State
The BCM performs the BCM functions in the wake-up state. The BCM enters the sleep state when the active control or monitoring of system
malfunctions has stopped, or when the BCM is idling. The BCM must detect certain wake-up inputs before entering the wake-up state. The BCM
monitors the BCM inputs during the sleep state, allowing the BCM to switch between the 2 states. The BCM wake-ups are as follows:
^
Door ajar switches
^
Door handle switches
^
Dome lamp
^
Park lamps
^
Power door lock switches
^
Interior lamp request active
^
Ignition key put into the ignition switch
^
Ignition key removed from the ignition switch
^
Ignition in the RUN position
^
Key in door lock switch
^
RFA request to the BCM
^
Any Class 2 communication requiring BCM interaction