Service Information: Description: Notes

WARNING: This page is about a different car, the 2006 Jeep Grand Cherokee. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Vehicle Theft Security System (VTSS) Component Locations

Courtesy of DAIMLERCHRYSLER CORP.

The Vehicle Theft Security System (VTSS) is an available factory-installed option on this vehicle. The VTSS is comprised of two primary subsystems: Vehicle Theft Alarm (VTA) and Sentry Key Immobilizer System (SKIS). The VTA is an active system that provides visual and audible responses as deterrents to and warnings of unauthorized vehicle tampering. The SKIS is a passive system that effectively immobilizes the vehicle against unauthorized operation. Following are paragraphs which describe these subsystems of the VTSS.

Certain functions and features of the VTSS rely upon resources shared with or controlled by other electronic modules in the vehicle over the Controller Area Network (CAN) data bus. Other modules that may affect VTSS operation are:

Driver Memory Mirror Module - Driver front door ajar switch and power lock switch status. (Refer to ELECTRICAL/ELECTRONIC CONTROL MODULES/MEMORY HEATED SEAT/MIRROR MODULE - DESCRIPTION) .
ElectroMechanical Instrument Cluster (EMIC) - Also sometimes referred to as the Cab Compartment Node (CCN). Driver and passenger rear door, liftgate and flip-up glass ajar switch status. Flip-up glass release switch status. VTA system logic. Security indicator control. (Refer to ELECTRICAL/INSTRUMENT CLUSTER - DESCRIPTION) .
Front Control Module (FCM) - Hood ajar switch status. Exterior lighting system and horn system control. (Refer to ELECTRICAL/POWER DISTRIBUTION - DESCRIPTION) .
Passenger Memory Mirror Module - Passenger front door ajar switch and power lock switch status. (Refer to ELECTRICAL/ELECTRONIC CONTROL MODULES/MEMORY HEATED SEAT/MIRROR MODULE - DESCRIPTION) .
Powertrain Control Module (PCM) - SKIS engine control logic. (Refer to ELECTRICAL/ELECTRONIC CONTROL MODULES/POWERTRAIN CONTROL MODULE - DESCRIPTION) .
Steering Control Module (SCM) - Ignition switch status. (Refer to ELECTRICAL/ELECTRONIC CONTROL MODULES/STEERING COLUMN CONTROL MODULE - DESCRIPTION) .

Except for the Sentry Key transponders, which rely upon Radio Frequency (RF) communication, hard wired circuitry connects the VTA and SKIS components to the electrical system of the vehicle. These hard wired circuits are integral to several wire harnesses, which are routed throughout the vehicle and retained by many different methods. These circuits may be connected to each other, to the vehicle electrical system and to the SKIS components through the use of a combination of soldered splices, splice block connectors, and many different types of wire harness terminal connectors and insulators. Refer to the SYSTEM WIRING DIAGRAMS article. The wiring information includes wiring diagrams, proper wire and connector repair procedures, further details on wire harness routing and retention, as well as pin-out and location views for the various wire harness connectors, splices and grounds.