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Home >> Mitsubishi >> 2004 >> Lancer Evolution >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Anti-Theft Systems >> Ignition Switch - Evolution >> Ignition Switch >> Immobilizer System Diagnosis >> Symptom Procedures >> Inspection Procedure 1: Communication With Scan MB991958 Is Impossible. >> Circuit Operation
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Circuit Operation

The Immobilizer-ECU is energized by the MFI relay when the ignition switch is turned "ON". The ECM transmits a signal from scan tool MB991958 to the immobilizer-ECU as it is. In the same way, a signal from the immobilizer-ECU is also transmitted to scan tool MB991958 as it is.

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