Power Door Lock System

POWER DOOR LOCK SYSTEM
When the BCM receives input for a lock request from a door lock switch, RKE or cylinder lock switch (only with VTSS), it will turn the lock drivers on for a specified time of 375 msec. If the request is there beyond 375 msec, the BCM considers the door lock signal stuck. Once a door lock or unlock signal is stuck for longer than 10 seconds, the BCM will set a trouble code and the signal input is ignored until the stuck condition disappears. The door lock switches provide a variable amount of resistance thereby dropping the voltage of the multiplexed (MUX) circuit and the BCM will respond to that command.

DOOR LOCK INHIBIT
When the key is in the ignition and in any position and either front door is open, the door lock switches LOCK functions are disabled. The UNLOCK functions are still functional. This protects against locking the vehicle with the keys still in the ignition. The RKE key fob will still lock the doors as usual. After the key is removed from the ignition or the doors are closed, the power door locks will operate normally.

AUTOMATIC DOOR LOCKS
This feature can be enabled or disabled by using either the DRBIII(R) or the customer programming method. When enabled all the doors will lock when the vehicle reaches a speed greater than 18 mph (29 km/h) and all the doors are closed. If a door is opened and the vehicle slows to below 18 mph (29 km/h), the door locks will operate again once all doors are closed and the speed is above 18 mph (29 km/h).

REMOTE KEYLESS ENTRY (RKE)
The body control module interfaces with the RKE module via a one-way serial bus interface. The RKE module is not on the PCI bus. The RKE module sends a 0 - 5 volt pulse width signal to the BCM depending on which button on the transmitter was pressed. The BCM controls the door lock/unlock functions and the arming/disarming of the Vehicle Theft Security System (if equipped) and the activation of illuminated entry. The BCM will also send the appropriate messages to the Power Sliding Doors and Power Liftgate modules. The Integrated Power Module (IPM) activates the park lamps, headlamps, and horn for horn chirp when sent the appropriate message from the BCM as received from the RKE transmitter. When a one-button press is made for unlock, both driver side doors will unlock and the front and rear turn signals will flash. When a second press is initiated (within 5 seconds of the first) both passenger doors will unlock and all four turn signals will flash.

The RKE module is capable of retaining up to 4 individual access codes (4 transmitters). If the PRNDL is in any position except park, the BCM will ground the interface thereby disabling the RKE.

Both the 3 and 6 buttons transmitters will have two CR2016 batteries in series. The 2-button export transmitter will have two CR2016 batteries in series also but the 5-button will have one. The minimum battery life should be approximately 4.7 years based on 20 transmissions a day at 84°F (25°C). Using the DRBIII(R) and selecting RKE FOB Test can test the transmitter.

The RKE module can be programmed via the DRBIII(R) or the customer programming method. The BCM will only allow programming mode to be entered when the ignition is in the on position, the PRNDL is in park position, and the VTSS (if equipped) is in the disarmed mode.