The power door lock system consists of the following components:

The power door lock system can be controlled by any of the following:

When any of the door lock switches are placed in the lock position, voltage is applied to the door lock control circuit and the lock relay winding. Since the other side of the lock relay winding is connected to ground, the relay is energized. This causes the contacts to close and complete the path from the PWR ACCY circuit breaker through the battery voltage circuit. Voltage is then applied to the lock side of the door lock actuators. Since the other side of the all the door lock actuators are connected to the normally closed contacts of the unlock relay to ground , the doors lock.

The lock function can also be accomplished by the BCM supplying voltage to the door lock control circuit by a delay lock function.

When any of the door lock switches are placed in the lock position, voltage is applied to the door lock control circuit and the lock relay winding. Since the other side of the lock relay winding is connected to ground, the relay is energized. This causes the contacts to close and complete the path from the PWR ACCY circuit breaker through the battery voltage circuit. Voltage is then applied to the lock side of the door lock actuators. Since the other side of the passenger door, cargo door or sliding side lock actuators are connected to the normally closed contacts of the unlock relay to ground and the driver door lock actuator is connected to the normally closed contacts of the driver door unlock relay to ground, the doors lock.

The lock function can also be accomplished by the BCM supplying voltage to the door lock control circuit by any of the following:

When any of the door lock switches are placed in the unlock position, voltage is applied to the door unlock control circuit and the unlock relay winding. Since the other side of the unlock relay winding is connected to ground, the relay is energized. This causes the contacts to close and complete the path from the PWR ACCY circuit breaker through the battery voltage circuit. Voltage is then applied to the unlock side of the door lock actuators. Since the other side of the door lock actuators are connected to the normally closed contacts of the lock relay to ground, the doors unlock.

When any of the door lock switches are placed in the unlock position, voltage is applied to the door unlock control circuit and the unlock relay winding. Since the other side of the unlock relay winding is connected to ground, the relay is energized. This causes the contacts to close and complete the path from the PWR ACCY circuit breaker through the battery voltage circuit. Voltage is then applied to the unlock side of the door lock actuators. Since the other side of the passenger(s) door lock actuators are connected to the normally closed contacts of the lock relay to ground, the doors unlock.

The unlock function can also be accomplished by the BCM supplying voltage to the door lock control circuit by a keyless entry unlock transmission.

The driver door unlock control circuit uses a dedicated driver door unlock relay. This is done so that the driver door may be unlocked by itself using a keyless entry unlock transmission. The driver door unlock relay differs slightly from the unlock relay in that the primary side of the relay is connected to the PWR ACCY circuit breaker and the door unlock control circuit is pulled low by the BCM to energize the relay.

When any of the door lock switches are placed in the unlock position, a voltage is applied to the unlock relay and to the BCM. When the BCM senses the voltage signal, it grounds the driver door unlock control circuit. Since the other side of the driver door unlock relay winding is connected to the PWR ACCY circuit breaker through the battery voltage circuit, the relay is energized. This causes the contacts to close and complete the path from the PWR ACCY circuit breaker through the battery voltage circuit. Voltage is then applied to the unlock side of the driver door lock actuator. Since the other side of the driver door lock actuator is connected to the normally closed contacts of the lock relay to ground, the driver door unlocks.

On vehicles equipped with a liftglass and dutch doors, the liftgate lock/unlock release switch (mechanical key) is added to serve the same function as the front power door lock switches. By inserting the door key into the liftgate lock/unlock release switch and turning the key to the lock or unlock positions, voltage is applied to the door lock or unlock control circuits to control the lock or unlock relays. This will lock or unlock all of the doors, including the dutch doors. Once the door lock system is unlocked, press the liftgate release switch to electrically open the liftglass and pull the handle to open the secondary latch.

For further information about the liftgate release system, refer to Rear Hatch/Gate Description and Operation in Body Rear End.

This feature allows the operator to lock all the doors from any door lock switch or a keyless entry lock transmission with the side door open. The sliding side door has contact plates that complete the power door lock and unlock fuse supply circuits when the sliding side door is closed, and interrupt these circuits when the sliding side door is open. When a lock function occurs and the BCM senses an active state on the sliding side door ajar switch signal circuit (door open), the driver, passenger and cargo doors will lock as described, and the BCM continues to monitor the sliding side door ajar switch signal circuit . When the BCM senses an inactive state (door closed), the BCM will cycle the door lock relay again after approximately 5 seconds to perform another lock function, thus locking the sliding side door.

This feature prevents the locking of the driver door if the ignition key is left in the ignition lock cylinder. If a lock function occurs from any door lock switch and the BCM senses an active state on either the left front door latch signal, secondary door latch switch signal and/or the lift gate ajar switch signal circuits and the key in ignition switch signal circuit is in the yes state, the BCM will cycle the door lock relay to lock the doors and then cycle the driver door unlock relay to unlock the driver door.

The automatic door lock option is factory programmed to have no doors lock or unlock. The automatic door lock feature can be programmed to control the door lock system based on the following inputs:

An automatic door lock function will only occur once per ignition cycle unless, any door jamb switch input changes state to active and back to inactive. Then the automatic door lock feature will lock all doors again.

Once the automatic door lock feature has locked the doors, the automatic door lock feature will then unlock all the doors once the ignition key is removed from the ignition.

For detailed instructions on programming the automatic door locks, refer to Vehicle Personalization in Personalization.