INSPECTION PROCEDURE A-5: Ignition "LOCK (OFF)" position-linked door unlock function does not operate.


caution
  • Before replacing the ECU, ensure that the power supply circuit, the earth circuit and the communication circuit are normal.
  • When the ETACS-ECU of vehicles without KOS is replaced, the encrypted code of the ignition key needs to be registered to the ETACS-ECU. (If the encrypted code is not registered, the engine cannot be started. Register the encrypted code as described in Immobilizer System - How to Register Key ID .)

COMMENTS ON TROUBLE SYMPTOM



PROBABLE CAUSES



  • Malfunction of CAN bus line
  • Malfunction of ETACS-ECU
  • Malfunction of ignition switch
  • Damaged wiring harness and connectors

DIAGNOSIS PROCEDURE


STEP 1. Checking central door unlocking operation



Q. Is the check result normal?





STEP 2. Check the customisation function.



Q. Is the check result normal?





STEP 3. M.U.T.-III CAN bus diagnostics



Q. Is the CAN bus normal?





STEP 4. Check the ignition switch.



Q. Is the check result normal?





STEP 5. Retest the system.



Q. Is the check result normal?