Antitheft and Alarm Systems: Testing and Inspection

VEHICLE THEFT SECURITY SYSTEM

The Vehicle Theft Security System (VTSS) is divided into two basic subsystems: Vehicle Theft Alarm (VTA) and Sentry Key Immobilizer System (SKIS). Following are the recommended procedures for diagnosis and testing of each of these two subsystems.

VEHICLE THEFT ALARM

Models equipped with the export premium version of the Vehicle Theft Alarm (VTA) provide some preliminary diagnostic feedback by illuminating the security indicator located in the ElectroMechanical Instrument Cluster (EMIC), sometimes referred to as the Cab Compartment Node (CCN). If the security indicator illuminates with the ignition switch in the On position, it indicates that there is a communication problem between the intrusion module and the EMIC/CCN, or between the intrusion module and the siren module. The EMIC/CCN will also turn on the security indicator if it receives a message from the intrusion module indicating that a Diagnostic Trouble Code (DTC) has been stored for a siren module fault.

To diagnose the EMIC/CCN, the Totally Integrated Power Module (TIPM), the intrusion module, the Controller Area Network (CAN) data bus, or the electronic message inputs and outputs used to provide the electronic features of the VTA, use a diagnostic scan tool and refer to the appropriate diagnostic information.

SENTRY KEY IMMOBILIZER SYSTEM

To diagnose the Sentry Key REmote Entry Module (SKREEM) (sometimes referred to as the Wireless Control Module (WCM), the ElectroMechanical Instrument Cluster (EMIC) (sometimes referred to as the Cab Compartment Node (CCN), the Totally Integrated Power Module (TIPM), the intrusion module, the Controller Area Network (CAN) data bus, or the electronic message inputs and outputs used to provide the electronic features of the VTA, use a diagnostic scan tool and refer to the appropriate diagnostic information.