Component Description

Anti-Theft - Perimeter-without Intelligent Access (IA)

Component Description

Hood Switch

The hood switch receives a voltage signal from the BCM (Body Control Module) on an input circuit. When the hood is closed, the hood switch is closed, routing the signal to ground. When the hood is opened, the hood switch opens, interrupting the signal. The BCM (Body Control Module) interprets this as an open hood.

The hood switch is part of the hood latch and not serviceable separately.

Door Ajar Switch

The door ajar switches each receive a voltage signal from the BCM (Body Control Module) on independent circuits. When the door is closed, the door ajar switch is closed, routing the signal to ground. When the door is opened, the door ajar switch opens, interrupting the signal. The BCM (Body Control Module) interprets this as an open door.

The door ajar switches are part of the door latches and not serviceable separately.

Liftgate or Luggage Compartment Lid Ajar Switch

The liftgate or luggage compartment lid ajar switch receives a voltage signal from the BCM (Body Control Module) on an independent circuit. When the liftgate or luggage compartment lid is closed, the ajar switch is closed, routing the signal to ground. When the liftgate or luggage compartment lid is opened, the ajar switch opens, interrupting the signal. The BCM (Body Control Module) interprets this as an open liftgate or luggage compartment lid.

The ajar switch is part of the liftgate or luggage compartment lid latch and not serviceable separately.

Door Lock Control Switch

The door lock control switch receives a voltage signal from the BCM (Body Control Module) on the input circuit. When the switch is pressed, the input circuit is routed to ground, signalling the BCM (Body Control Module) to lock or unlock the doors.

The door lock control switch contains a door lock indicator for a visual indication of the door lock status. The BCM (Body Control Module) controls the door lock indicator on the door lock control switch. If all 4 doors are locked, the indicator is illuminated.

Integrated Keyhead Transmitter (IKT)





The IKT (Integrated Keyhead Transmitter) incorporates both the PATS (Passive Anti-Theft System) functions 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). A maximum of 8 IKTs (Integrated Keyhead Transmitters) can be programmed.

Passive Anti-Theft System (PATS) Transceiver

The PATS (Passive Anti-Theft System) transceiver reads any key that is placed in the ignition. When the ignition is turned to the RUN or START position, the BCM (Body Control Module) activates the PATS (Passive Anti-Theft System) transceiver. Once the transceiver is activated, it activates the key in the ignition and receives the key data. Once the transceiver receives the key data, it sends the data to the BCM (Body Control Module).

Body Control Module (BCM)

The BCM (Body Control Module) controls the operation of the perimeter alarm. The BCM (Body Control Module) receives direct input from:
- the ajar switches
- the hood switch
- the door lock control switch
- the PATS (Passive Anti-Theft System) transceiver
It receives RKE (Remote Keyless Entry) messages from the internal antenna.

REFER to Body Control Module (BCM) .