Circuit/System Description

The driver and passenger door lock and side window switches are integrated control module switch assemblies. The DDS and PDS door lock switches are normally open, 2 position rocker type switches, with detents for lock and unlock. The DDS and PDS are directly connected to the respective door lock actuator through the door lock actuator control circuits. When a door lock or unlock function is activated from the DDS or PDS a GMLAN lock or unlock command is sent to the other door switch and body control module (BCM). The BCM controls the rear door lock actuators through a printed circuit board relay in the IP fuse block. The unlock side of the relay is controlled by the BCM through a low side drive control circuit and the lock side of the relay is controlled through a high side drive control circuit. When the BCM grounds the door unlock control circuit, the unlock relay coil is energized and battery voltage is supplied to the unlock actuator control circuits through the unlock fuses 1 and 2. During unlock operation the actuators are grounded through the lock control circuits to the lock fuses 1 and 2 and the de-energized lock side of the relay. When the BCM supplies voltage the lock relay control circuit, the lock relay coil is energized and battery voltage is supplied to the lock actuator control circuits through the lock fuses 1 and 2. During lock operation the actuators are grounded through the unlock control circuits to the unlock fuses 1 and 2 and the de-energized unlock side of the relay.