Sentry Key Immobilizer System

The Sentry Key Immobilizer System (SKIS) is standard factory-installed equipment on this vehicle. The SKIS provides passive vehicle protection by preventing the engine from operating unless a valid electronically encoded key is detected in the ignition lock cylinder.

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

• Security Indicator  - A security indicator is integral to the ElectroMechanical Instrument Cluster (EMIC) (also known as the Cab Compartment Node/CCN). Refer to DESCRIPTION .
• Sentry Key Remote Entry Module (5)  - The Sentry Key REmote Entry Module (SKREEM) (also known as the Wireless Control Module/WCM) is located on the right side of the steering column near the ignition lock cylinder housing and an integral molded plastic antenna ring circles the ignition lock cylinder like a halo. The SKREEM and its antenna are concealed beneath the shrouds on the steering column. Refer to MODULE, SENTRY KEY IMMOBILIZER (SKREEM), DESCRIPTION .
• Sentry Key Transponder  - The Sentry Key transponder is contained within the Remote Keyless Entry (RKE) transmitter integral to the head of the ignition key. Refer to KEY, TRANSPONDER, DESCRIPTION .