Power Door Locks

The BCM controls the door locks using a series of integrated relays (driver door unlock/passenger doors unlock/all doors lock). When the relays are not energized, ground is provided on both circuits to the lock motors within the latches. When an unlock relay energizes, voltage is provided to one side of the lock motor to unlock the door(s). When the lock relay energizes, the polarity is reversed and the motors lock the doors.

The DDM and PDM send voltage signals to the front door lock control switches. When a door lock control switch is pressed, the voltage signal is routed to ground, indicating a request to lock/unlock the doors.

When the DDM or PDM detects a lock or unlock request, a message is sent over the CAN to the BCM to lock or unlock the doors.

If equipped, the BCM sends voltage signals to the rear door lock control switches. When a rear door lock control switch is pressed, the voltage signal is routed to ground, indicating a request to lock/unlock the doors. When the BCM detects a lock or unlock request, the BCM energizes the appropriate relays to lock or unlock the doors.

In the event of a power door lock failure, the doors can be individually locked through the manual door lock. The manual door lock is located on the rear edge of the door just above the door latch opening. For the doors on the left side of the vehicle, insert a key and turn clockwise to lock. For the doors on the right side of the vehicle, insert a key and turn counterclockwise to lock.

Based on input from the door lock control switches, the keyless entry keypad (if equipped), the passive entry system (if equipped) and the RKE transmitter, the BCM unlocks the driver door, unlocks all the doors or locks all the doors.

Power Rear Door Child Safety Locks (if equipped) 

The power child lock feature is used to electronically activate the rear door child safety locks. This feature operates in conjunction with the rear power windows lock-out feature. When the lock-out switch is placed in the LOCK position with the ignition on, the rear door child safety locks are actuated. A child lock feedback switch is monitored by the corresponding rear door module. When the child lock is activated, the switch opens to indicate the child safety lock is engaged. The rear door module sends the data to the DDM/ PDM over a LIN. The DDM/ PDM then communicates the child lock feedback to the BCM over the CAN.

Based on the information received, BCM sends a request to the DDM to command on/off the child safety lock indicator located on the master window control switch.

When the power rear door child safety lock has been actuated, the rear door does not open from the interior door handle. The same occurs when the child safety lock is manually actuated.

When the child safety lock is not actuated, the rear door handle must be pulled twice to open the door when locked.

LED Door Lock Indicators 

Each door panel has a door lock indicator located on the window sill to indicate the lock or unlock status of that individual door. The door lock indicators are controlled by the lock/unlock feedback switch located within each door latch. When activated, they illuminate to indicate a door is locked and are off when a door is unlocked.

The Light Emitting Diodes (LEDs) are powered continuously when the ignition is on, or for 5 minutes after a lock request if the ignition is off.

The DDM and PDM provide voltage to their respective front door lock indicator and the BCM supplies voltage to the rear door lock indicators.

The lock/unlock feedback switch (within each door latch) provides a ground path to bypass the indicator. The switch is closed when the door is unlocked (indicator not illuminated) and open when locked (indicator illuminated).

The LED door lock indicators are part of the electrical harness and cannot be replaced independently.

Switch Inhibit Feature 

The switch inhibit feature prevents unauthorized access to the vehicle from the door lock control switches or the liftgate release switch. The BCM ignores the inputs from all of the door lock control switches and the interior liftgate release switch 20 seconds after the vehicle is electronically locked. If any of these switches are activated while they are inhibited, a chime sounds and a message displays in the message center to indicate the switches are inhibited. The BCM enables the function of these switches when the vehicle is electronically unlocked.

This feature can be configured on/off through the message center.

Power Door Locking Feedback 

The exterior lamps and exterior sounder provide visual and audible feedback when unlocking and locking the doors under certain circumstances. Refer to the following table:

There is also feedback provided by the vehicle to the key for the remote start feature. For additional information regarding the remote start feedback, refer to the Owner's Literature.

The BCM controls the exterior sounder. When requested, the BCM provides voltage to the exterior sounder to actuate it.