Code No. P0605: Read Only Memory (FLASH ROM) Malfunction


FUNCTION



  • The engine-ECU reads information from flash ROM.
  • The engine-ECU detects checksum errors.

TROUBLE JUDGMENT


Check Conditions
  • Ignition switch is in "ON" position.
Judgment Criterion
  • In each inspection target area of a flash ROM, a checksum mismatch is detected three times consecutively.

PROBABLE CAUSE



  • Failed engine-ECU

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III diagnosis code

  • After erasing the diagnosis code through M.U.T.-III, ignition switch is "ON" position and confirm whether the diagnosis code is output.

Q. Is the diagnosis code set?
Replace the engine-ECU. When the engine-ECU is replaced, write the chassis number (Refer to GROUP 00 - 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 ).