Body Control Module (BCM)

WARNING: This page is about a different car, the 2025 Jeep Compass. However, it is still accessible from the selected car via links, so may be relevant.

BODY CONTROL MODULE (BCM)

REFER TO: COMPONENT INDEX .

THE BCM IS THE GATEWAY MODULE USED TO CONVERT BUS MESSAGES, THEN BROADCASTS THEM FROM ONE BUS TO ANOTHER.
THE BCM READS THE STATE OF THE DOOR, SWING GATE AND HOOD SWITCHES BEFORE ENABLING CRANK.
THE BCM IS RESPONSIBLE FOR ACTUATING THE STARTER RELAY LOW SIDE DRIVER ONCE COMMANDED BY THE PCM HIGH SIDE RELAY CRANK COMMAND.
THE BCM RECEIVES OVER LIN BUS THE IBS INFORMATION ABOUT RAW BATTERY CURRENT, VOLTAGE, AND TEMPERATURE LEVELS.
THE BCM IS RESPONSIBLE FOR DEACTIVATING THE STARTER MOTOR.