Vehicle Theft Security - Description

DESCRIPTION

The Vehicle Theft Security System (VTSS) is comprised of two primary subsystems: a standard equipment vehicle immobilizer system (also known as the Drive Authorization System/DAS) and an optional Vehicle Theft Alarm (VTA) (also known as the Anti-Theft Alarm/ATA system or EDW). The vehicle immobilizer system is a passive system that effectively immobilizes the vehicle against unauthorized operation. The VTA is an active system that provides visual and audible responses as deterrents to and warnings of unauthorized vehicle tampering. 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.

Except for the transmitter keys, which rely upon InfraRed (IR) and Radio Frequency (RF) communication, hard wired circuitry connects the vehicle immobilizer and VTA 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 VTSS 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.

VEHICLE IMMOBILIZER SYSTEM

The vehicle immobilizer system is standard factory-installed equipment on this vehicle. Vehicles equipped with the Vehicle Theft Alarm (VTA) are also equipped with the vehicle immobilizer system. The immobilizer system provides passive vehicle protection by preventing the engine or steering from being operated unless a valid transmitter key is detected.

The vehicle immobilizer system includes the following major components, which are described in further detail elsewhere in this service information:

- ElectroMechanical Instrument Cluster - The ElectroMechanical Instrument Cluster (EMIC) (also known as the Cab Compartment Node/CCN or KOMBI) multi-function display illuminates with an icon and text message when appropriate indicating a problem with the vehicle immobilizer drive authorization status. Description.
- Electronic Ignition Switch - The Electronic Ignition Switch (EIS) (also known as the Electronic Ignition Switch/Central GateWay/EIS/CGW or EZS) is a primary component of the vehicle immobilizer system, providing drive authorization and ignition switch status messages to all of the other electronic modules in the vehicle over the CAN data bus. .
- Engine Control Module - The Engine Control Module (ECM) (also known as the Powertrain Control Module/PCM, ME/M272 or OM642/CR4/CDI control module) provides the vehicle immobilizer system engine control logic. Description.
- Shaft Lock Module - A shaft lock module (also known as the Electric Steering Lock/ESL or electric steering lock control unit/ESC) is located on the underside of the steering column below the instrument panel in the passenger compartment of the vehicle. The shaft lock module provides the vehicle immobilizer system steering column control hardware and logic. .
- Transmitter Key - The transmitter key contains an electronic Remote Keyless Entry (RKE) radio transmitter, an electronic InfraRed (IR) vehicle immobilizer system transceiver and a mechanical key. .

VEHICLE THEFT ALARM

The Vehicle Theft Alarm (VTA) system is an available option on this vehicle. The base VTA system provides perimeter vehicle protection by monitoring the vehicle doors, the hood, the ignition switch and, on vehicles with heated rear door glass, the rear door windows. In addition, the VTA has available optional features, including: tow-away protection and interior motion detection. If unauthorized vehicle use or tampering is detected, these systems respond by pulsing the vehicle horn (without optional motion detection) or a battery-powered siren (with optional motion detection) as an audible deterrent and flashing certain exterior lamps as a visual deterrent.

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

- Body Control Module - The Body Control Module (BCM) (also known as the Signal Acquisition and Actuation Module/SAM) provides door cylinder lock switch status as well as exterior lighting system and horn system control. Description.
- Door Cylinder Lock Switches - A door cylinder lock switch (also known as Central Locking/CL rotary tumbler switches) is integral to the door latch mechanism of each front, side and rear door. .
- Electronic Ignition Switch - The Electronic Ignition Switch (EIS) (also known as the Electronic Ignition Switch/Central GateWay/EIS/CGW or EZS) is a primary component of the vehicle immobilizer system and is also a monitored component of the VTA system, providing drive authorization and ignition switch status messages to all of the other electronic modules in the vehicle over the CAN data bus. .
- Hood Ajar Switch - A hood ajar switch (also known as the Anti-Theft Alarm/ATA hood switch) is located near the hood latch below the upper radiator cover within the engine compartment.
- Instrument Panel Switch Pod - The instrument panel switch pod (also known as the center console switch unit, Switch Bank Module/SBM, Upper Control Panel/UCP or OBF). The instrument panel switch pod provides VTA status indications through the Light Emitting Diode (LED) of the central locking switch as well as turn signal lamp flashing control. .
- Intrusion Sensor - There are up to three intrusion sensors (also known as interior protection sensors) located in each vehicle with the VTA motion detection option. A front sensor with an integrated inclination sensor for tow-away protection are integral to the Overhead Control Panel (OCP) with the Roof Control Module (RCM) in the headliner near the upper windshield opening header. A center sensor is mounted on the headliner or on a roof bow near the center of the passenger or load compartment. A rear sensor is mounted in the headliner or on the rear roof bow near the rear door opening header. These sensors each provide inputs to the RCM indicating whether there is movement detected within the vehicle.
- Roof Control Module - The Roof Control Module (RCM) (also known as the Overhead Control Panel/OCP control unit or DBE) is a primary component of the optional VTA system and provides interior lighting system control as well as housing the motion detector OFF and inclination sensor OFF switches. Description.
- Siren - A battery-operated alarm siren is located below the battery bracket on the left side of the engine compartment on vehicles equipped with the optional VTA interior motion detection and tow-away protection features.