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MPI – TROUBLESHOOTING 13A-62 From previous page C-50 Engine ECU connector voltage (1) Voltage across 57 – earth (Ignition switch OFF) (2) Voltage across 57 – earth OK: 1V or less Check connectors C-50, B-19X Check and repair harness broken or has short circuit Check connectors C-50, C-51, Check harness between ignition Confirm fault symptoms Intermittent malfunction (ref. Check connector C-50 Check harness between engine control relay and engine circuit, or is damaged Check engine control relay output power supply harness Check connector C-34 Check harness between battery and engine control relay Check harness between engine control relay and engine Confirm fault symptoms Replace engine ECU Intermittent malfunction (ref. Chapter 00 – Intermittent Replace engine ECU OK OK OK OK OK OK OK OK OK OK OK OK NG NG NG NG NG NG NG NG (1) NG (2 NG NG NG NG OK Repair Repair Repair Repair Repair Repair Repair Repair Repair |