Sentry Key Immobilizer System

The Sentry Key Immobilizer System (SKIS) is factory-installed standard equipment on this model. The SKIS provides passive vehicle protection, immobilizing the vehicle by preventing the engine from operating unless a valid electronically encoded key or FOB with Integrated Key (FOBIK) is detected. In vehicles equipped with the Passive Entry Keyless Go (PEKG) system, the valid FOBIK must only be present somewhere within the passenger compartment of the vehicle for the engine to continue to operate.

The Radio Frequency Hub (RF-Hub) is the primary component of the SKIS. It is also the receiver for the Remote Keyless Entry (RKE) system, the Keyless Go (KG) system and the Passive Entry (PE) system.

The Keyless Ignition Node (KIN) includes the integral ignition switch push button. The KIN is located in the instrument panel, just to the right of the steering column. The remainder of the KIN including its mounting provisions and electrical connections are concealed within the instrument panel.

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

• Keyless Ignition Node  - The KIN is located in the instrument panel just inboard of the steering column. Refer to MODULE, KEYLESS IGNITION NODE (KIN), DESCRIPTION .
• Low Frequency Antenna  - Vehicles equipped with the optional PEKG system have several low frequency antenna units strategically placed within the vehicle for the location and removal procedures. Refer to PASSIVE ENTRY SYSTEM, DESCRIPTION .
• Powertrain Control Module  - The Powertrain Control Module (PCM) is located in the engine compartment. Refer to MODULE, POWERTRAIN CONTROL (PCM), DESCRIPTION .
• Radio Frequency Hub  - The RF-Hub is located in the forward cabin concealed by the headliner. Refer to MODULE, RADIO FREQUENCY (RF HUB), DESCRIPTION .
• Integrated Key Fob Transmitter / FOBIK  - A Sentry Key transponder microchip is located within each FOBIK. Refer to TRANSMITTER, INTEGRATED KEY FOB, DESCRIPTION .

The PCM and the RF-Hub each contain a microcontroller and programming that allow them to communicate with each other and other electronic modules in the vehicle using the Controller Area Network (CAN) data bus. In addition, the KIN and the RF-Hub communicate with each other using a private data bus. Refer to COMMUNICATION, DESCRIPTION .