Operation CHARM: Car repair manuals for everyone.

Component Description




Handles, Locks, Latches and Entry Systems - without Door Modules (without Window One-touch Up)

Component Description

Door Latch

The door latches are sealed units and contain the door lock actuator, lock/unlock feedback switch, and the door ajar switch. The door latches can be lubricated, if necessary. REFER to Latch Lubrication .

Liftgate or Luggage Compartment Lid Latch

The liftgate or luggage compartment lid latch is a sealed unit and contains the release motor and the ajar switch.

Door Lock Control Switch

The door lock control switch is a momentary contact switch that receives voltage from the BCM (Body Control Module) on the input circuit. When the switch is pressed, it routes the input circuit to ground, signaling the BCM (Body Control Module) to lock or unlock the doors. When the switch is pressed, the doors lock or unlock depending upon their current state.

The door lock control switch contains a door lock indicator that is used for indication of the door lock status.

Liftgate or Luggage Compartment Lid Release Switch

The liftgate or luggage compartment lid release switch is a momentary contact switch that receives voltage from the BCM (Body Control Module) on the input circuit. When the switch is pressed, the input circuit is routed to ground, signaling the BCM (Body Control Module) to release the liftgate or luggage compartment lid latch. The release switch only operates when the driver door or all doors are unlocked electronically.

Integrated Keyhead Transmitter (IKT)





The IKT (Integrated Keyhead Transmitter) incorporates both the PATS (Passive Anti-Theft System) and the RKE (Remote Keyless Entry) transmitter functions in a single device.

During key programming procedures, the PATS (Passive Anti-Theft System) and RKE (Remote Keyless Entry) transmitter of an IKT (Integrated Keyhead Transmitter) are both programmed into the BCM (Body Control Module). REFER to Key Programming Using Diagnostic Equipment Key Programming Using Diagnostic Equipment or REFER to Key Programming Using Two Programmed Keys Key Programming Using Two Programmed Keys to program the IKTs (Integrated Keyhead Transmitters).

Passive Anti-Theft System (PATS) Key





The PATS (Passive Anti-Theft System) key contains a transponder with an encrypted code. The PATS (Passive Anti-Theft System) transceiver reads the transponder code when the ignition transitions to RUN or START. If the key has been programmed to the vehicle, the engine is allowed to start.

Body Control Module (BCM)

The BCM (Body Control Module) controls the operation of the power door locks and the RKE (Remote Keyless Entry) system. The BCM (Body Control Module) receives direct input from the liftgate or luggage compartment lid release switch and the door lock control switch. It has an internal antenna for receiving the signals from messages from RKE (Remote Keyless Entry) transmitters. Depending upon the input received and if conditions allow, the BCM (Body Control Module) either locks/unlocks the doors or releases the liftgate or luggage compartment lid.

REFER to Body Control Module (BCM) .