The body control module (BCM) controls the automatic door locks.

There are three BCM types:

BCM type 2 has the following features:

BCM type 2 provides the following functions:

BCM type 3 has the following features:

BCM type 3 provides the following functions:

BCM type 4 has the following features:

BCM type 4 provides the following functions:

All Door Unlock

The all door unlock feature allows the following actions:

Pressing UNLOCK on either door lock switch sends a ground signal to the BCM through CKT 194. This action causes the BCM to apply voltage in CKT 694 and CKT 294 for 315-385 ms. This energizes all of the door actuators. All of the vehicle doors unlock.

All Door Lock

The all door lock feature allows the following actions:

If you press LOCK on either door switch, a ground signal is sent to the BCM through CKT 195. The BCM evaluates the last door locking and lockout prevention features in order to determine when it is appropriate to lock the doors. At the appropriate time, the BCM applies voltage in CKT 295 for 315-385 ms. This action energizes all of the door actuators. The energized door actuators lock all of the doors.

Last Door Closed Locking

The BCM activates the last door closed locking feature when the following conditions exist:

When these conditions exists and you press LOCK, the BCM sounds the chime 3 times in order to indicate that the last door locking feature is active.

The BCM locks all of the doors 4.5-5.5 seconds after all of the doors are closed.

Complete the following steps in order to cancel the last door closed locking feature:

1. Press UNLOCK on a door lock switch or a keyless entry transmitter.
2. Turn the ignition switch to the ACC or the RUN position.

Press LOCK twice in order to override the last door closed locking feature. The BCM will lock all of the doors immediately with a door still open.

Lockout Prevention

The BCM does not lock the vehicle doors when you press LOCK on either door lock switch with the lockout prevention feature active.

The BCM activates the lockout prevention factor if the following conditions exist:

The BCM disables the following automatic door lock features when the lockout prevention feature is active:

Lockout Prevention Override

Press and hold LOCK on either door lock switch for 3 seconds in order to override the lockout prevention feature. This action causes the BCM to lock all of the doors immediately.

Ignition Off Unlock

The BCM unlocks the doors when the following conditions exist:

1. The automatic door lock operation mode 3 is enabled. Refer to Feature Customization further in this section.
2. The transaxle is shifted into PARK.

The BCM detects an open to B+ transition signal in CKT 1872.

3. The ignition switch is turned from the RUN position to the UNLOCK or OFF position.

Shift Into PARK Unlock

The BCM unlocks the doors when the following conditions exist:

Shift Out Of PARK Lock

The BCM locks the doors when the following conditions exist:

Key Cylinder Unlock (RPO UA6)

The BCM unlocks all of the vehicle doors when you unlock a door using a door key cylinder.

Unlocking a door using either key cylinder lock sends a ground signal to the BCM through CKT 781. Holding the key in the unlock position for 1 second causes the BCM to apply voltage in CKT 694 and CKT 294 for 315-385 ms. This action will energize all of the door actuators. Energized door actuators unlock all of the vehicle doors.

Automatic Door Lock Operation Modes

Combinations of the following three features are enabled by the automatic door lock operation modes:

The four modes enable the indicated combinations of features:

Changing the Automatic Door Lock Operation Mode

Complete the following steps in order to change the automatic door lock operation mode:

1. Turn off the instrument panel dimmer switch.
2. Turn the ignition switch to the OFF position.
3. Remove the MALL PGM fuse.
4. Turn the ignition switch to the ACC position.

The BCM sounds the chime 1-4 times. The BCM will sound the chime a number of times that corresponds to the BCM type that is installed to the vehicle.

The chime indicates that the BCM has entered the feature customization mode.

5. Press and release LOCK on either door lock switch.

The BCM will sound the chime a number of times that is equivalent to the automatic door lock operation mode. A transition past mode 4 repeats the sequence starting with mode 1.

6. Complete the following steps in order to exit and save the current customization mode:

•	Turn the ignition switch to the OFF position.

•	Reinstall the MALL PGM fuse.

If you are unable to change the locking modes, refer to Feature Customization Mode Inoperative .

Locking Control Modes

Combinations of the following two features are enabled by the automatic door lock operation modes:

The four locking control modes provide the indicated combinations of features:

Illuminated Entry

For vehicles equipped with BCM type 4, the BCM turns ON the courtesy lights when you unlock a door using the door cylinder lock. Refer to Interior Lights Circuit Description in Lighting Systems.

Delayed Illumination

The delayed illumination features is cancelled when you press LOCK on a door lock switch or a keyless entry transmitter. Refer to Lighting System Description in Lighting Systems.