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Home >> Chrysler >> 2004 >> Intrepid ES, 3.5 V >> Repair and Diagnosis >> Engine Performance >> System >> Powertrain Diagnostic Procedures >> System Description And Functional Operation >> Functional Operation >> Skis Overview
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Skis Overview

The Sentry Key Immobilizer System (SKIS) is designed to prevent unauthorized vehicle operation. The system consists of a Sentry Key Immobilizer Module (SKIM), ignition key(s) equipped with a transponder chip and PCM. When the ignition switch is turned on, the SKIM interrogates the ignition key. If the ignition key is Valid or Invalid, the SKIM sends a PCI Bus message to the PCM indicating ignition key status. Upon receiving this message the PCM will terminate engine operation, or allow the engine to continue to operate.