Code No. P0606: Engine-ECU (main CPU) Malfunction
FUNCTION
The engine-ECU check whether the microcomputer, which performs the drive control of the throttle valve, is normal.
TROUBLE JUDGEMENT
Check Condition
Ignition switch is in "ON" position
Judgement Criterion
The monitoring microcomputer detects a main microcomputer error.
FAIL-SAFE AND BACKUP FUNCTION
The rail pressure is controlled in the range between 50 and 100 MPa.
The fuel injection amount is restricted (Output restriction).
The open angle of the accelerator pedal is restricted.
The throttle valve is closed (Fixed opening degree).
The EGR control is stopped (fully closed).
The turbocharger control is prohibited.
PROBABLE CAUSE
Failed engine-ECU
DIAGNOSIS PROCEDURE
STEP 1. M.U.T.-III diagnosis code
Reconfirmation of diagnosis code.
Q. Is the diagnosis code set?
Replace the engine-ECU.
Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions
).