Body Control Module (BCM)

The BCM is a multi-function module that performs the following functions:

• Receive and authenticate active transmitter and keyless start/entry signals from the remote control door lock receiver
• Determines the function requested by the transmitter signal
• Performs the function requested by the transmitter signal
• Activating vehicle antennas for passive keyless entry functions
• Activating vehicle antennas for keyless start functions
• Backup control for the ECM accessory wakeup and the run/crank relay
• If equipped, controls the electronic steering column lock
• Receiver of the exterior door handle switch inputs and door open switch (not the door ajar switch)
• Ignition mode switch monitoring