Description And Operation: Anti-Theft: Notes

WARNING: This page is about a different car, the 2008 Mercury Mariner and 2008 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: The smart junction box (SJB) is also known as the generic electronic module (GEM).

The passive anti-theft system (PATS) consists of the following components:

Anti-theft indicator (located in the instrument cluster [IC])
Encoded ignition integrated keyhead transmitter (IKT) PATS key(s) (the key contains a transponder and a remote keyless entry [RKE] transmitter)
Encoded (the key contains a transponder) ignition PATS keys (not factory equipped, but may be used in place of IKT keys)
PATS transceiver
IC
PCM

PATS uses radio frequency identification technology to deter a drive-away theft. Passive means that it does not require any activity by the user.

The vehicle is equipped with 2 IKT PATS keys. The IKTs operate as a standard PATS key with an RKE transmitter incorporated into the keyhead. The IKTs require batteries for the RKE transmitter to operate. A maximum of 4 IKT keys can be programmed to operate the vehicle. If more than 4 IKT keys are programmed, the RKE portion of the additional keys do not operate and the SJB and the IC set a memory full DTC (B1138 - Memory Full). These additional keys will start the vehicle, but will not operate the RKE system. If additional PATS keys are desired, a standard PATS key (a non-IKT key) can be used. For the purposes of this section, the PATS portion of the IKT key is referred to as a PATS key.