P1974 – Cyclic RAM Test (Engine) MMC Colt



FUNCTION

  • Monitor engine-ECU calculation.
  • Monitoring is performed periodically.

  • TROUBLE JUDGMENT

  • Ignition switch is “ON” position.
  • The (engine) RAM data of engine-ECU is abnormal.

  • PROBABLE CAUSE

  • Failed engine-ECU

  • DIAGNOSIS PROCEDURE

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

  • After clearing the diagnosis code through M.U.T.-III, ignition switch is “ON” position and confirm whether the diagnosis code is output.
  • Q. Diagnosis code set?

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