General Information

The Body Control Module (BCM) controls the automatic door locks.
There are three BCM types:
^ BCM type 2
^ BCM type 3
^ BCM type 4

BCM type 2 has the following features:
^ Automatic power door locks
^ Interior illumination control
^ Inadvertent load (battery rundown) protection
^ Chime functions
^ Retained Accessory Power (RAP)

BCM type 2 provides the following functions:
^ All door unlock
The BCM unlocks all of the doors when you press UNLOCK on either door lock switch.
^ All door lock
The BCM locks all of the doors when you press LOCK on either door switch.
^ Last door closed locking
The BCM locks all of the doors 5 seconds after you close all of the vehicle door when the following actions occur:
- The ignition switch is in the OFF position.
- You press LOCK on either door lock switch.
^ Lockout prevention
The BCM does not lock the doors if you press LOCK on either door lock switch and the following conditions exist:
- The key is in the ignition cylinder.
- The driver's door is open.
^ Lockout prevention override
The BCM overrides the lockout prevention when you press and hold LOCK for 3 seconds on either door. This action locks the doors.
^ Ignition OFF unlock
The BCM unlocks all of the vehicle doors when you turn the ignition switch from the RUN to the UNLOCK position.
^ Shift into PARK unlock
The BCM unlocks all of the vehicle doors when you shift the transaxle into PARK.
^ Shift out of PARK lock
The BCM locks all of the vehicle doors when you shift the transaxle out of PARK and the driver's door is closed.

BCM type 3 has the following features:
^ All of the BCM type 2 features
^ The keyless entry system (RPO AUO)

BCM type 3 provides the following functions:
^ All of the functions provided by the BCM type 2
^ Remote driver door unlock
The BCM unlocks the driver's door when you press UNLOCK on the keyless entry transmitter.
^ Remote all door unlock
The BCM unlocks all of the vehicle doors when you press UNLOCK on keyless entry transmitter a second time within 5 seconds.
^ Remote all door lock
The BCM locks all of the vehicle doors when you press LOCK on the keyless entry transmitter.

BCM type 4 has the following features:
^ All of the BCM type 2 and 3 features
^ The content theft deterrent system (RPO UA6) with remote activation verification and a remote alarm

BCM type 4 provides the following functions:
^ All of the functions provided by the BCM type 2 and 3
^ Key cylinder unlock
The BCM unlocks all of the vehicle doors when you unlock a door using the door key cylinder.