Posted in MMC L200 P0606 – Engine-ECU (main CPU) Malfunction MMC L200 IV Posted by admin Posted on September 28, 2020 FUNCTIONThe engine-ECU check whether the microcomputer, which performs the drive control of the throttle valve, is normal.TROUBLE JUDGEMENTIgnition switch is in “ON” positionThe monitoring microcomputer detects a main microcomputer error.PROBABLE CAUSEFailed engine-ECUDIAGNOSIS PROCEDURESTEP 1. M.U.T.-III diagnosis codeReconfirmation of diagnosis code.Q. Is the diagnosis code stored? Author: admin