Component Description
Door Lock Control Switches
The door lock control switches are dual pole, single throw momentary contact switches. The BCM (vehicles without memory seat) or the DDM and PDM (vehicles with memory seat) provide the voltage signals to the door lock control switches 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.
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.
Interior Luggage Compartment Lid Release Switch
The interior luggage compartment lid release switch (part of the headlamp switch) is a momentary contact switch that supplies a ground signal to the BCM. When the interior luggage compartment lid release switch is pressed, the signal is routed to ground indicating a request to the BCM to release the luggage compartment lid latch.
Exterior Luggage Compartment Lid Release Switch
The exterior luggage compartment lid release switch is a momentary contact switch that supplies a ground signal to the BCM. When the exterior luggage compartment lid release switch is pressed, the signal is routed to ground indicating a request to the BCM to release the luggage compartment lid latch.
Luggage Compartment Lid Latch
The luggage compartment lid latch contains the luggage compartment lid latch release motor and the luggage compartment lid ajar switch. The luggage compartment lid latch release motor is momentarily supplied voltage by the BCM when a valid request to open the luggage compartment lid is detected.
Passive Key
The passive key incorporates both the PATS and passive key transmitter functions in a single device.
During key programming procedures, the PATS and passive key transmitter Identification (ID) of a passive key are both programmed.
The passive key also contains a removable key blade that unlocks the driver door in the event of an electrical failure (such as a drained battery). The passive key requires 1 battery. For battery replacement instructions, refer to the Owner's Literature.
To start the vehicle in the event of a passive key battery failure, place the passive key in the backup starting location. Refer to: Passive Anti-Theft System (PATS) - System Operation and Component Description .
Exterior Door Handles
The exterior front door handles contain a keyless entry antenna and capacitive touch sensor(s). The antennas and lock/unlock sensors are wired to the BCM. When activated, the antenna transmits a low frequency signal to activate a passive key.
Keyless Entry Rear Antenna
The keyless entry rear antenna is monitored and activated by the BCM. The antennas and lock/unlock sensors are wired to the BCM. When activated, it transmits a low frequency signal to activate a passive key.
DDM / PDM
When equipped with a memory seat, the DDM and the PDM monitor the door lock control switches and control the operation of the power windows and the power mirrors. They communicate with each other and the BCM over the CAN.
The DDM and PDM require PMI when replaced.
RTM
The RTM communicates all passive key information to the BCM over a LIN -based circuit whether or not the CAN is active. The RTM is a receiving antenna that receives the high frequency signals from passive keys.
The RTM 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 luggage compartment lid. The BCM receives inputs for the door lock control switches, keys and passive key commands over the CAN and LIN -based circuits.
When the BCM is replaced, carry out the PMI and the parameter reset procedures and program at least 2 keys.