The power door lock system locks or unlocks all doors with the actuation of a single door lock switch. Power is available at all times from the DOOR LOCK fuse through CKT 1240 to the following components:

Both relays are grounded through CKT 150 at G201.

Each door lock switch has two contacts. When the upper portion of the door lock switch is depressed in order to unlock the doors, one contact closes in order to apply voltage to CKT 682. The switch is an input to the BCM which energizes the unlock relay coil. The relay switch contacts then close in order to apply voltage to CKT 294. CKT 294 applies voltage to all the door lock motors, which are grounded through the following components:

When the lower portion of the door lock switch is depressed in order to lock the doors, the other switch contact closes in order to apply a ground to CKT 682. The switch is an input to the BCM which energizes the lock relay coil. Since the coil in the relay is grounded at all times through CKT 150 and G201, the coil is energized. The relay switch contacts then close in order to apply voltage to CKT 295. CKT 295 applies voltage to all the door lock motors which are grounded through the following components:

When the vehicle is equipped with keyless entry, the following doors operate as described above:

The left front door lock motor does not operate in the same manner. When either door lock switch is moved to the LOCK position, the operation is similar to the above operation, with the following exceptions:

If you move either door lock switch to the UNLOCK position, the following components receive voltage:

When the remote control door lock receiver receives the unlock signal, the receiver then applies voltage to the left front door lock motor through CKT 694. The motor is then grounded through CKT 295 as described above.

The programmable automatic door locks is a standard feature intended to provide enhanced security and convenience by automatically locking and unlocking the doors. The automatic locking and unlocking of the doors will occur if the ignition key is turned ON and the drivers door is closed when the vehicle is shifted out of PARK. The following operating modes may be selected and programmed by the driver:

The programmable automatic door locks operate in mode 1 when the vehicle is shipped from the factory.

Disconnecting the vehicle battery for up to 1 year will not change the programmed mode of the programmable automatic door locks.

The operating mode of the programmable automatic door locks will be changed when the driver performs the following sequence with the doors closed and the vehicles ignition key turned to the ON position:

1. Press and hold the LOCK button on the power door lock switch for 10 seconds.
2. Count the number of chimes heard. Release the switch when you hear the chimes. The number of chimes indicates the mode the vehicle is in. Change the mode by pressing and holding LOCK on the power door lock switch 2 chimes for mode 2, 3 chimes for mode 3, and 4 chimes for mode 4. Repeat Step 1 until the number of chimes matches the mode desired.

The Body Control Module (BCM) controls the automatic door locks. Refer to Body Control System Operation in Body Control System for more information.

The BCM has these automatic door lock features:

Refer to Remote Keyless Entry Circuit Description in Keyless Entry for more information regarding the operation of the keyless entry system. Refer to Body Control System Description in Body Control System for more information regarding the BCM.

The BCM unlocks all doors when pressing unlock once on either door lock switch.

Pressing unlock on either door lock switch grounds a 12V signal through a 1.5-Ohms resistor to the BCM through circuit 682. This action causes the BCM to activate the unlock relay which then supplies voltage from CKT 1240 to CKT 294 for 315-385 ms, energizing all passenger door actuators and unlocking all passenger doors. Door actuators ground through the door lock relay. This action energizes the driver's door lock actuator and unlocks the driver's door lock.

Pressing lock on either door lock switch grounds a feed signal to the BCM through CKT 682. When the BCM deems appropriate to lock the doors (based on last door closed locking and lockout prevention features), the BCM activates the lock relay which then applies voltage from circuit 195 to circuit 295 for 315-385 ms, energizing all door actuators and locking all vehicle doors.

The BCM activates the last door closed locking feature when these conditions are met:

Upon pressing lock, the BCM sounds the chime 3 times. This provides feedback indicating that the last door closed locking feature is active 7 seconds after all doors are closed, the BCM locks all doors.

To cancel this feature:

To override this feature: Press lock twice. The BCM locks all door immediately with a door still open.

The BCM does not lock the vehicle doors when pressing lock on either door lock switch with the lockout prevention feature active. The BCM activates the lockout prevention feature when these conditions are met:

When the lockout prevention feature is active, the BCM disables these automatic door lock features:

To override the lockout prevention feature, press and hold lock on either door lock switch for three seconds. This action causes the BCM to lock all doors immediately.

The BCM unlocks all doors when these conditions are met:

The BCM unlocks the driver's door only when these conditions are met:

The BCM locks the doors when these conditions are met:

The following table contains the automatic door lock/unlock modes:

If the vehicle is equipped with keyless entry, all of the doors operate as described above.

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

1. Verify that the car is in the factory Mode 1.
2. Close all of the vehicle doors.
3. Turn the ignition switch to the ON position.
4. Depress one of the door mounted lock switches to the LOCK position. Hold the switch for 10 seconds.
5. After 10 seconds, the chime will sound 2 times. Release the switch. Mode 2 has been restored.
6. Repeat Step 2 through Step 4 in order to select Mode 3.
7. Repeat Step 2 through Step 4 again in order to select Mode 4.

If you repeat the steps a third time, the mode will return to Mode 1.

If the vehicle is not equipped with keyless entry, the above process will automatically transition from Mode 1 to Mode 3.