Circuit Description

WARNING: This page is about a different car, the 2002 Chevrolet Monte Carlo, 2002 Chevrolet Impala, 2001 Chevrolet Monte Carlo, and 2001 Chevrolet Impala. However, it is still accessible from the selected car via links, so may be relevant.

Outputs to door lock actuators are controlled by Body Control Module (BCM). When BCM receives a lock input from a door lock switch or keyless entry transmitter, it applies battery voltage to door lock actuator lock control circuit and a ground to door lock actuator unlock control and driver door lock actuator unlock control circuits. When BCM receives an unlock input from a door lock switch, it applies battery voltage to door lock actuator unlock control and driver door lock actuator unlock control circuits and a ground to door lock actuator lock control circuit. When BCM receives a single unlock input from a keyless entry transmitter, it applies battery voltage to driver door lock actuator unlock control circuit and a ground to door lock actuator lock control circuit to unlock driver door. A second unlock input from the keyless entry transmitter applies battery voltage to door lock actuator unlock control circuit and a ground to door lock actuator lock control circuit to unlock passenger door(s).