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Home >> Chrysler >> 2001 >> Sebring LX, 2D Convertible >> Repair and Diagnosis >> External Pages >> Different car >> Section 48 (Vehicle Theft Security System - Coupe) >> Ignition Switch >> Immobilizer System Diagnosis >> Symptom Procedures >> INSPECTION PROCEDURE 1: Communication with Scan Tool MB991502 is Impossible. >> Circuit Operation

Circuit Operation

WARNING: This page is about a different car, the 2005 Dodge Stratus and 2005 Chrysler Sebring. However, it is still accessible from the selected car via links, so may be relevant.

Immobilizer-ECU is energized when the ignition switch is turned "ON," and the MFI relay is turned on. The ECM < M/T > or PCM < A/T > transmits a signal from scan tool MB991502 to the immobilizer-ECU as it is. In the same way, a signal from the immobilizer-ECU is also transmitted to scan tool MB991502 as it is.

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