Code No. P0603: EEPROM Malfunction <Except Euro5b>


FUNCTION



  • To check whether the information such as the idle learned value and so on is stored in the memory of engine-ECU.

TROUBLE JUDGMENT


Check Conditions
  • Ignition switch is in ON position
Judgement Criterion
  • When the abnormal EEPROM memory data is detected.

PROBABLE CAUSE



  • Failed the engine-ECU

DIAGNOSIS

STEP 1. Reconfirmation of diagnosis codes.

Q. Is the check result normal?
Replace the engine-ECU. When the engine-ECU is replaced, write the chassis number (Refer to GROUP 00 - Precautions Before Service - How to Perform Chassis Number Writing ). After replacing the engine-ECU, register the injector identification code and learn fuel injection (Refer to GROUP 00 - Precautions Before Service - What The Common Rail Engine Learns ).
Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions ).