Inspection Procedure 5: The front door switch (driver’s side) signal is not received.


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 front door switch (LH)
  • Malfunction of the ETACS-ECU
  • Damaged harness wires and connectors

DIAGNOSIS PROCEDURE


STEP 1. Check the installation condition.



Q. Is the check result normal?





STEP 2. Front door switch (driver’s side) check



Q. Is the check result normal?





STEP 3. Check of short to power supply, short to earth, and open circuit in DDR line between ETACS-ECU connector and front door switch (LH) connector


Q. Is the check result normal?





STEP 4. M.U.T.-III data list



    Open the driver’s door.
Item No.
 Item name
 Normal condition
Item 256
 Dr door ajar switch
 Open
OK: Normal condition is displayed.

Q. Is the check result normal?