Inspection Procedure 5: No door will be locked or unlocked by operating a lock/unlock switch on any door.


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

PROBABLE CAUSES



  • Malfunction of the CAN bus lines
  • Malfunction of the central door locking system
  • Malfunction of the keyless operation key
  • Damaged wiring harness and connectors
  • Malfunction of the KOS-ECU
  • Function setting error or no setting with a customisation

DIAGNOSIS PROCEDURE


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



Q. Is the check result normal?





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



Q. Is the diagnosis code set?





STEP 3. Check the central door locking system operation



Q. Is the check result normal?





STEP 4. Check the customisation



Q. Is it set to "Both enable"?





STEP 5. Check with another registered keyless operation key.


Q. Can the engine switch be turned ON? (Is the keyless operation key recognised?)





STEP 6. Check of the troubles



Q. Is the check result normal?