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Home >> Mitsubishi >> 2003 >> Eclipse GTS, Standard >> Repair and Diagnosis >> Body & Frame >> Ignition Switch/Steering Lock >> Ignition Switch & Immobilizer System >> Ignition Switch >> General Description >> Immobilizer System >> Construction Diagram

Construction Diagram

  1. When the ignition switch is turned to ON position, the ECM (M/T) or PCM (A/T) sends a requirement for the encrypted code to the immobilizer-ECU (at this time, the engine is remobilized).
  2. When the immobilizer-ECU receives the requirement from the ECM (M/T) or PCM (A/T), the immobilizer-ECU supplies power to the transponder inside the ignition key via the antenna. The energized transponder sends the encrypted code back to the immobilizer-ECU via the antenna.
  3. The immobilizer-ECU judges the encrypted code with its code logic in itself. If they are identical, the immobilizer-ECU sends the encrypted code to the ECM (M/T) or PCM (A/T).
  4. If the ECM (M/T) or PCM (A/T) cannot receive the encrypted code, the engine will be immobilized.
    Fig 1: Ignition Switch Circuit Diagram
    G01890163Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
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