Inspection Procedure 4: Keyless Operation warning display does not disappear.



caution Before replacing the ECU, ensure that the power supply circuit, the earth circuit and the communication circuit are normal.


PROBABLE CAUSES



  • Malfunction of CAN bus line
  • Malfunction of combination meter
  • Damaged wiring harness and connectors
  • Malfunction of the KOS-ECU

DIAGNOSIS PROCEDURE


STEP 1. M.U.T.-III CAN bus diagnostics



Q. Is the check result normal?





STEP 2. M.U.T.-III other system diagnosis code



Q. Is the diagnosis code set?





STEP 3. M.U.T.-III diagnosis code



Q. Is the diagnosis code set?





STEP 4. Check of the troubles



Q. Is the check result normal?