General Description
LockWhen the Lock Button is pressed, the Body Control Module (BCM) logic grounds the "Lock All" coil of Relay #5 which sends a pulsed signal to both Door Lock Actuators, causing LH and RH doors to lock. The BCM turns off all Courtesy Lamps as visual confirmation that a lock function was performed.
Unlock
When the Unlock Button is pressed once, the Body Control Module (BCM) logic grounds the "Unlock Driver" coil of Relay #3, which sends a pulsed signal to the LH Door Lock Actuator, causing the LH door to unlock. To provide illuminated entry, the BCM also grounds the Dome/Courtesy Lamps through CKT 156 for 40 seconds and then initiates the Theater Dimming function until the it sees an Ignition "ON" input. When the Unlock Button is pressed twice, (the second must be within five seconds of the first) the BCM grounds the "Unlock Driver" coil of Relay #3, which sends a pulsed signal to the RH Door Lock Actuator, causing the RH door to unlock.