Component Description

Passive Anti-Theft System (PATS) - without Intelligent Access (IA)

Component Description

Integrated Keyhead Transmitter (IKT)

NOTE: The IKTs (Integrated Keyhead Transmitters) must have SA stamped on the keyblade. Conventional PATS (Passive Anti-Theft System) keys must have HA or SA stamped on the keyblade.





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). Conventional PATS (Passive Anti-Theft System) keys can also be programmed to the vehicle if requested by the customer.

Up to a maximum of 4 IKTs (Integrated Keyhead Transmitters) can be programmed. If more than 4 IKTs (Integrated Keyhead Transmitters) are programmed, INT KEY COULD NOT PROGRAM is displayed in the message center during the key programming procedure and the RKE (Remote Keyless Entry) function of that IKT (Integrated Keyhead Transmitter) is non-functional.

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 ON or START position, the BCM (Body Control Module) activates the PATS (Passive Anti-Theft System) transceiver. Once the transceiver is activated, it in turn 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) is responsible for checking the identification from the PCM (Powertrain Control Module) and checking the key in the ignition. It also controls the ignition states and determines the ignition mode or if the engine should be started depending upon input from the ignition switch.

If the BCM (Body Control Module) is replaced, at least two keys must be programmed and the parameter reset procedure must be performed to enable PATS (Passive Anti-Theft System).

Powertrain Control Module (PCM)

The PCM (Powertrain Control Module) is responsible for allowing starter and fuel injector operation. The PCM (Powertrain Control Module) receives an enable or disable message from the BCM (Body Control Module) over the HS-CAN (High Speed Controller Area Network).

If the PCM (Powertrain Control Module) is replaced, the parameter reset procedure must be performed to enable PATS (Passive Anti-Theft System).