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CHASSIS ELECTRICAL – Ignition Switch and Immobilizer System 54A-12 CHECK AT IMMOBILIZER-ECU TERMINAL VOLTAGE CHECK CHART Terminal No. Signal Checking requirements Terminal voltage 1 Immobilizer-ECU power supply Ignition switch: ON System voltage 2 – – – 3 Engine-ECU – – 4 Immobilizer-ECU earth Always 0 V |