Posted in Mitsubishi Colt

P1971 – Fail-safe Control Monitoring MMC Colt

 Posted by  Posted on September 26, 2020

FUNCTION

  • Monitor the engine speed during the fail safe control.

    • TROUBLE JUDGMENT

  • During the Fail-safe control
  • The engine speed is higher than the expected.

    • PROBABLE CAUSE

  • Failed engine-ECU

    • DIAGNOSIS PROCEDURE

    STEP 1. M.U.T.-III diagnosis code

    Q. Is any other diagnosis code than P1971 output?

    STEP 2. M.U.T.-III diagnosis code

  • After clearing the diagnosis code through M.U.T.-III, start the engine and confirm whether the diagnosis code is output.

    • Q. Diagnosis code set?

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