Code No. P0603: EEPROM Malfunction
FUNCTION
To check whether the information such as the idle learned value and so on is stored in the memory of engine-ECU.
TROUBLE JUDGEMENT
Check Condition
Ignition switch is in "ON" position
Judgement Criterion
When the abnormal EEPROM memory data is detected.
FAIL-SAFE AND BACKUP FUNCTION
The EGR control is stopped (fully closed).
PROBABLE CAUSE
Failed engine-ECU
DIAGNOSIS PROCEDURE
STEP 1. M.U.T.-III diagnosis codes.
Q. Is the check result normal?
Replace the engine-ECU.
Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions
).