Section 55 (Vehicle Theft Security (Service Information) 500 - Electric): Description

WARNING: This page is about a different variant/trim than selected.

The Sentry Key Immobilizer System (SKIS) is factory-installed standard equipment on this vehicle. The SKIS provides passive vehicle protection, immobilizing the vehicle by preventing the vehicle from operating unless a valid electronically encoded key is detected in the ignition lock cylinder. The SKIS functions are integrated into the Body Control Module (BCM). Vehicles with this equipment can be readily identified by the illumination of the security indicator in the Instrument Panel Cluster (IPC) for about three seconds after the ignition switch status transitions to On as a SKIS bulb test.

The SKIS includes the following major components, which are described in further detail elsewhere within this service information:

Body Control Module - The BCM is concealed within the instrument panel outboard of the steering column. Refer to MODULE, BODY CONTROL (BCM), DESCRIPTION .
Electric Vehicle Control Unit - The Electric Vehicle Control Unit (EVCU) is located in the engine compartment and provides the SKIS Battery Electric Vehicle (BEV) control logic. Refer to UNIT, ELECTRIC VEHICLE CONTROL (EVCU), DESCRIPTION .
Security Indicator - A security indicator is integral to the IPC. Refer to DESCRIPTION .
Sentry Key Immobilizer Antenna - A antenna ring is located around the circumference of the ignition lock cylinder housing and concealed beneath the steering column shrouds.
Sentry Key Transponder - A Sentry Key transponder microchip is located on the circuit board within the Remote Keyless Entry (RKE) transmitter of each ignition key.

Except for the Sentry Key transponders, which rely upon Radio Frequency (RF) communication, hard wired circuitry connects the 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 appropriate wiring information. 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.