Posted in Mitsubishi Colt P1973 – RAM Test For All Area MMC Colt Posted by admin Posted on September 26, 2020 FUNCTIONMonitor engine-ECU calculation.Monitoring is performed periodically.TROUBLE JUDGMENTIgnition switch is “ON” position. The RAM data (all) of engine-ECU is abnormal.PROBABLE CAUSEFailed engine-ECUDIAGNOSIS PROCEDURESTEP 1. M.U.T.-III diagnosis codeAfter 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? Author: admin