System Operation
Handles, Locks, Latches and Entry Systems - with Intelligent Access (IA)
System Operation
System Diagram
Network Message Chart
Module Network Input Messages - BCM (Body Control Module)
Module Network Input Messages - DDM (Driver Door Module)
Module Network Input Messages - PDM (Passenger Door Module)
Module Network Input Messages - RFA (Remote Function Actuator) Module
Power Door Locks
The BCM (Body Control Module) monitors the door lock control switch. When the BCM (Body Control Module) receives a lock/unlock command from the door lock control switch, the BCM (Body Control Module) sends a lock/unlock command message to the DDM (Driver Door Module) and the PDM (Passenger Door Module) over the MS-CAN (Medium Speed Controller Area Network). When the DDM (Driver Door Module) and PDM (Passenger Door Module) receive the lock/unlock command, they send the lock/unlock request to the DRDM (Driver Rear Door Module) and PRDM (Passenger Rear Door Module) over the corresponding LIN (Local Interconnect Network). Each door module then supplies power and ground to the corresponding door lock actuator to unlock or lock the door.
Each door module monitors the door lock/unlock status by sending a voltage signal to the lock/unlock feedback switch inside each of the 4 door latches. The switches are closed when the door is unlocked and open when locked. The rear door modules transmit the lock/unlock data to the corresponding front door module. The front door modules in turn transmit the data to the BCM (Body Control Module). The BCM (Body Control Module) uses this input to determine if the indicator should be illuminated or off. The BCM (Body Control Module) controls the voltage to the door lock indicator.
If all 4 doors are locked, the indicator is illuminated. If any door is unlocked, the indicator is off.
If the BCM (Body Control Module) detects any door unlocked when the door lock control button is pressed, the doors lock. If the BCM (Body Control Module) detects all the doors locked when the door lock control button is pressed, the doors unlock.
The doors can also be centrally locked or unlocked using a key in the driver door lock cylinder. When a key is used in the driver door lock cylinder to lock or unlock the driver door, the BCM (Body Control Module) detects the lock/unlock feedback input change state and correspondingly locks or unlocks all the other doors.
In the event of a failure of the power door locks, 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 driver side of the vehicle, insert a key and turn the key clockwise to lock. For the doors on the passenger side of the vehicle, insert a key and turn the key counterclockwise to lock.
Autolock
The autolock feature (when enabled) locks all the doors when:
- all the doors are closed.
- the ignition is in the RUN position.
- the vehicle is shifted into any gear.
- the vehicle reaches a speed greater than 7 km/h (4.3 mph).
The autolock feature repeats when:
- any door is opened then closed with the ignition in the RUN position.
- the vehicle reaches a speed greater than 7 km/h (4.3 mph).
The autolock feature can be enabled or disabled. REFER to Autolock Programming Autolock Programming.
Auto-Unlock
NOTE: The doors will not auto-unlock if the vehicle has been electronically locked before the driver door is unlocked.
The auto-unlock feature unlocks all of the doors when the driver door is unlocked.
The auto-unlock feature can be enabled/disabled. REFER to Auto-Unlock Programming Auto-Unlock Programming.
Smart Unlock
The smart unlock feature prevents the doors from electronically locking when an IA (Intelligent Access) key is left inside the vehicle. When the doors are locked and then closed, the interior of the vehicle is scanned for an IA (Intelligent Access) key. If an IA (Intelligent Access) key is inside the vehicle when the doors are locked and closed, the doors are unlocked.
The vehicle can still be locked with an IA (Intelligent Access) key inside the vehicle by locking the doors with the removable mechanical key blade from the IA (Intelligent Access) key in the driver door lock cylinder or the lock button pressed on another IA (Intelligent Access) key.
Door Intelligent Access (IA)
The door IA (Intelligent Access) feature allows the doors to be locked or unlocked without having to use the door lock cylinder or the RKE (Remote Keyless Entry) transmitter feature. With a programmed IA (Intelligent Access) key within 1 m (3.28 ft) outside the door, touch the lock or unlock sensor on the exterior door handle. The doors lock or unlock depending upon which sensor was touched on the handle. The unlock sensor (front doors only) is located on the inside of the handle and the lock sensor is located on the outside face of the handle. Only touch one sensor at a time. Touching both sensors at the same time can cause unintended system behavior.
The driver door IA (Intelligent Access) feature either unlocks only the driver door or all 4 doors. If stepped unlock is enabled, the driver door is the only door that unlocks from the driver door IA (Intelligent Access) feature. If stepped unlock is disabled, then all 4 doors unlock. The driver door IA (Intelligent Access) lock feature always locks all 4 doors. REFER to Stepped Unlock Programming Stepped Unlock Programming.
The passenger door IA (Intelligent Access) feature only locks or unlocks all 4 doors.
The rear door IA (Intelligent Access) feature only unlocks all 4 doors.
When the RFA (Remote Function Actuator) module detects that a lock or unlock sensor is touched on an exterior door handle, it activates the low frequency antenna in the corresponding exterior front door handle. The low frequency antenna sends out a signal to the IA (Intelligent Access) key. The low frequency signal activates the IA (Intelligent Access) key which then sends a high frequency signal back to the RFR (Remote Functions Receiver) module. The RFR (Remote Functions Receiver) module interprets the high frequency signal from the IA (Intelligent Access) key and sends the information to the RFA (Remote Function Actuator) module. If the RFA (Remote Function Actuator) module determines that it is a programmed key, it sends a message to the BCM (Body Control Module) on the MS-CAN (Medium Speed Controller Area Network) to either unlock the driver door, unlock all 4 doors, or lock all 4 doors.
Liftgate or Luggage Compartment Intelligent Access (IA)
The liftgate or luggage compartment IA (Intelligent Access) feature allows the liftgate or luggage compartment lid to be released without using an RKE (Remote Keyless Entry) transmitter. With a programmed IA (Intelligent Access) key within 1 m (3.28 ft) outside the liftgate or luggage compartment lid, press the release button, and the liftgate or luggage compartment lid latch releases.
When the RFA (Remote Function Actuator) module detects a signal from the liftgate or luggage compartment lid release switch, it activates the low frequency liftgate or luggage compartment IA (Intelligent Access) antenna. The low frequency antenna sends out a signal to the IA (Intelligent Access) key. The low frequency signal activates the IA (Intelligent Access) key which then sends a high frequency signal back to the RFR (Remote Functions Receiver) module. The RFR (Remote Functions Receiver) module interprets the high frequency signal from the IA (Intelligent Access) key and sends the information to the RFA (Remote Function Actuator) module. If the RFA (Remote Function Actuator) module determines that it is a programmed key, it sends a message over the MS-CAN (Medium Speed Controller Area Network) to the BCM (Body Control Module) to release the liftgate or luggage compartment lid.
Remote Keyless Entry (RKE)
The RKE (Remote Keyless Entry) system uses an IA (Intelligent Access) key. The IA (Intelligent Access) key incorporates both the PATS (Passive Anti-Theft System) and the RKE (Remote Keyless Entry) transmitter functions in a single device. REFER to Intelligent Access (IA) Key.
The IA (Intelligent Access) key supplies a signal to the RFR (Remote Functions Receiver) module when any RKE (Remote Keyless Entry) button is pressed. The RFR (Remote Functions Receiver) module interprets the information from the IA (Intelligent Access) key and sends a signal to the RFA (Remote Function Actuator) module. If the RFA (Remote Function Actuator) module determines that it is a programmed key, it sends a message over the MS-CAN (Medium Speed Controller Area Network) to the BCM (Body Control Module).
The RKE (Remote Keyless Entry) functions of an IA (Intelligent Access) key initiate the following electronic system functions:
- Unlocks the driver door
- Unlocks all doors
- Locks all doors
- Releases the liftgate or luggage compartment lid latch
- Arms/disarms the perimeter alarm
- Commands the interior lamps on (when unlocking) and off (when locking)
- Provides a long flash of the turn signals when UNLOCK is pressed
- Flashes the turn signals once when LOCK is pressed and all the doors are closed. If LOCK is pressed again within 3 seconds, the horn sounds once and the turn signals flash.
- Sounds the horn twice when LOCK is pressed twice within 3 seconds, and any door is ajar or a door does not lock
The RKE (Remote Keyless Entry) transmitter has a normal operating range of 20 m (65.62 ft).
RKE (Remote Keyless Entry) Unlock Control
The RKE (Remote Keyless Entry) feature provides lock/unlock functions independently of key position, vehicle speed, or transmission position. The RKE (Remote Keyless Entry) feature provides a stepped (if enabled) process for unlocking the doors. Upon receipt of the first request for unlocking the doors, the RKE (Remote Keyless Entry) control feature unlocks the driver door only and provides a long flash of the turn signals. If another unlock request is received within 3 seconds of the first, the RKE (Remote Keyless Entry) feature unlocks all the doors. This feature can be disabled so that all the doors unlock on the first press of the unlock button. REFER to Stepped Unlock Programming Stepped Unlock Programming for programming information.
RKE (Remote Keyless Entry) Lock Control
The RKE (Remote Keyless Entry) feature requests that all of the doors be locked when the lock button is pressed. On any press of the lock button with all doors closed, the doors lock and the turn signals flash one time. If any door or liftgate/ luggage compartment lid is ajar, no flash occurs. As soon as the last door or liftgate/luggage compartment lid is closed, the turn signals flash. If 2 presses of the lock button are received within 3 seconds, the horn chirps once and the turn signals flash to indicate that all of the doors and liftgate are closed and locked. If any door is ajar when the second lock request is received within 3 seconds of the first, the RKE (Remote Keyless Entry) transmitter feature chirps the horn twice without flashing the turn signals to indicate it locked all of the doors but 1 or more doors or the liftgate/luggage compartment lid is ajar or did not lock. When the ignition is in the RUN position, the turn signal flashes and horn chirp confirmations do not occur.