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Home >> Infiniti >> 2011 >> M56 Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - Introduction, System Description And Basic Inspection (VK56VD) >> Ecu Diagnosis Information >> ECM >> Fail-safe >> Non DTC Related Item

Non DTC Related Item

NON DTC RELATED ITEM REFERENCE CHART

Detected items Engine operating condition in fail-safe mode Remarks Reference Information
Malfunction indicator lamp circuit Engine speed will not rise more than 2, 500 RPM due to the fuel cut When there is an open circuit on MIL circuit, the ECM cannot warn the driver by illuminating MIL when there is malfunction on engine control system.
Therefore, when electrical controlled throttle and part of ECM related diagnoses are continuously detected as NG for 5 trips, ECM warns the driver that engine control system malfunctions and MIL circuit is open by means of operating the fail-safe function.
The fail-safe function also operates when above diagnoses except MIL circuit are detected and demands the driver to repair the malfunction.
"DIAGNOSIS PROCEDURE "