Sentry Key Immobilizer System

WARNING: This page is about a different car, the 2015 Chrysler 300. However, it is still accessible from the selected car via links, so may be relevant.

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 SKIS used in combination with the export premium version of the Vehicle Theft Alarm (VTA) adds a steering shaft lock feature that provides passive protection by preventing the vehicle from being steered unless a valid encoded FOBIK is present somewhere within the passenger compartment of the vehicle. The export premium version of the VTA is only available in vehicles manufactured for sale in certain markets where it is required equipment.

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

Keyless Ignition Node - The Keyless Ignition Node (KIN) is located in the instrument panel just inboard of the steering column. Refer to MODULE, KEYLESS IGNITION NODE, DESCRIPTION .
Low Frequency Antenna - Vehicles equipped with the Passive Entry Keyless Go (PEKG) system have several low frequency antenna units strategically placed within the vehicle.
Powertrain Control Module - The Powertrain Control Module (PCM) (also known as the Engine Control Module/ECM) is located in the engine compartment. Refer to MODULE, POWERTRAIN CONTROL, DESCRIPTION .
Radio Frequency Hub Module - The Radio Frequency Hub Module (RFHM) (also known as the RF Hub) is located on the package shelf support behind the rear seat back where it is concealed beneath the package shelf trim. Refer to MODULE, RADIO FREQUENCY (RF HUB), DESCRIPTION .
Sentry Key Transponder - A Sentry Key transponder microchip is located within each FOB with Integrated Key (FOBIK). Refer to KEY, TRANSPONDER, DESCRIPTION .
Shaft Lock Module - A shaft lock module (also known as the Electronic Steering Column Lock/ESCL module) is located on the lower end of the steering column below the instrument panel in the passenger compartment of vehicles built for sale in certain export markets and equipped with the export premium version of the VTA.

The PCM and the RFHM 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, the RFHM and the shaft lock module communicate with each other using a Local Interface Network data bus. Refer to COMMUNICATION, DESCRIPTION .