Passive Entry (if equipped)
The passive entry feature unlocks or locks the doors or opens the liftgate without having to use a mechanical key or the RKE transmitter feature.
When the RFA module detects that a lock or unlock sensor is touched on an exterior door handle or the liftgate release button is pressed, it activates the low frequency antenna in the corresponding exterior door handle or inside the rear bumper cover. The low frequency antenna sends out a signal to the passive key. The low frequency signal activates the passive key which then sends a high frequency signal to the Radio Frequency (RF) receiver. The Radio Frequency (RF) receiver interprets the high frequency signal from the passive key and sends the information to the RFA module. If the RFA module detects a valid programmed passive key, the RFA module sends a command to either unlock the driver door, unlock/lock all 4 doors or sends a command to the RGTM to open the liftgate.
Door Passive Entry
With a valid programmed passive key within 1 m (3.28 ft) outside a door, touch the lock or unlock sensor on the exterior door handle. The doors lock or unlock depending upon the sensor touched. The unlock button is located on the inside of the handle and the lock button is located on the outside face of the handle.
The driver front door passive entry feature either unlocks the driver door (if staged unlock is enabled) or all four doors (if staged unlock is disabled). The passive entry feature always locks all four doors when the lock button is touched. To change between these modes: Refer to: Staged Unlock Programming .
The passenger front door passive entry feature always locks or unlocks all four doors.
Liftgate Passive Entry
With a valid programmed passive key within 1 m (3.28 ft) outside the liftgate, press the liftgate release button on the liftgate and the power liftgate feature activates.
Component Description
Door Lock Control Switches
The door lock control switches are single pole, double throw switches. They are supplied voltage signals from the BCM for the lock and unlock requests. When a switch is pressed to lock or unlock, the corresponding input circuit is routed to ground, indicating a request to lock or unlock the doors
The door lock control switches contains a door lock indicator that is used to indicate the door lock status.
Master Window Control Switch
The master window control switch communicates to the DDM through a private LIN. When commanded by the master window control switch, the DDM provides the child safety locks (if equipped) switch status to the BCM.
Door Latches
The door latches are sealed units and contain the door lock actuator, lock/unlock feedback switch and the door ajar switch. The door lock actuators operate in 2 directions, depending on the polarity of the voltage. The door latches can be lubricated, if needed. Refer to: Door Latch Lubrication .
Exterior Liftgate Release Switch
The exterior liftgate release switch is a momentary contact switch that supplies a ground signal to the BCM and, if equipped, the RFA module. When the switch is pressed, the signal is routed to ground, indicating a request to the BCM to release the liftgate latch or for the RFA module to initiate the passive entry feature.
Liftgate Latch
The liftgate latch contains the liftgate latch release motor and the liftgate ajar switch. The liftgate latch release motor is momentarily supplied voltage by the BCM when a valid request to open the liftgate is detected.
Keyless Entry Keypad
The keyless entry keypad is a touch sensitive capacitive sensor integrated into the front door window moulding. When a finger touches the keypad, it changes the capacitance of the sensor in the area of the finger touch. The keypad determines which area is touched and provides a ground signal to the corresponding voltage reference circuit(s). The keypad only works when touched with a finger. The keyless entry keypad may not work when gloves are worn. The gloves act as an insulator and do not allow the finger to change the sensor capacitance.
IKT
The IKT incorporates both the PATS functions and the RKE transmitter functions in a single device.
During key programming procedures, the PATS and RKE transmitter Identification (ID) of an IKT are both programmed. A maximum of 8 keys can be programmed.
Passive Key
The passive key incorporates both the PATS and the RKE transmitter functions in a single device.
During key programming procedures, the PATS and RKE transmitter Identification (ID) of a passive key are both programmed. A maximum of 8 passive keys can be programmed.
If the passive key battery fails, the passive key contains a key blade to unlock the door manually. Additionally, the passive key must be placed in the PATS transceiver backup location to start the vehicle.
Exterior Door Handles
The exterior front door handles contain a keyless entry antenna and a capacitive touch lock and unlock sensor. The antennas and lock/unlock sensors are wired to the RFA module. When activated, the antenna transmits a low frequency signal to activate a passive key.
Keyless Entry Rear Antenna
The keyless entry rear antenna is wired to the RFA module. When activated, it transmits a low frequency signal that activates a passive key.
DDM or PDM
The DDM and PDM control the operation of the power door locks, power windows, and the power mirrors. They communicate with each other and the BCM over the MS-CAN.
They also send commands and receive feedback from the respective Rear Door Module (RDM) over a LIN for each module.
The DDM and PDM do not require PMI when replaced.
Rear Door Module (RDM)
The Rear Door Module (RDM) controls the operation of the power door locks and power windows in their respective door. They receive commands and send feedback with the corresponding DDM or PDM over a LIN for each module.
The Rear Door Module (RDM) does not require PMI when replaced.
Radio Frequency (RF) Receiver
The Radio Frequency (RF) receiver has a dedicated power and ground. It communicates all RKE information to the RFA module through a dedicated LIN-based network. The Radio Frequency (RF) receiver is a receiving antenna that receives the high frequency signals from a passive key. It also receives the signals for the RKE commands.
RFA Module
The RFA module is responsible for obtaining the passive key data and keyless entry lock/unlock requests. It uses the keyless entry antennas and the Radio Frequency (RF) receiver to receive the passive key data. The RFA module receives direct input from the Radio Frequency (RF) receiver, the keyless entry antennas and the lock/unlock sensors. The RFA module communicates the passive key and request data to the BCM over the MS-CAN.
If the RFA module is replaced, at least two keys must be programmed to it and a parameter reset performed with the BCM to disable the PATS.
The RFA module requires PMI when replaced.
BCM
The BCM is the master module in control of the power door lock system. It is responsible for locking/unlocking the doors and releasing the liftgate latch. The BCM receives direct input from the door lock control switches. It receives passive entry and RKE commands from the RFA module over MS-CAN.
If the BCM is replaced, at least two keys must be programmed to it and a parameter reset performed with the RFA module and the PCM to disable the PATS.
The BCM requires PMI when replaced.