Inspection Procedure 8: The rear door switch (LH) signal is not received.


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

COMMENTS ON TROUBLE SYMPTOM



PROBABLE CAUSES



  • Malfunction of rear 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. Connector check: D-20 rear door switch (LH) connector


Q. Is the check result normal?





STEP 3. Rear door switch (LH) check



Q. Is the check result normal?





STEP 4. Connector check: C-412 ETACS-ECU connector


Q. Is the check result normal?





STEP 5. Wiring harness check between the D-20 rear door switch (RH) connector terminal No. 3 and the C-412 ETACS-ECU connector terminal No. 7



Q. Is the check result normal?





STEP 6. M.U.T.-III data list



    Open the rear left door.
Item No.
 Item name
 Normal condition
Item 259
 RL door ajar switch
 Open
OK: Normal condition is displayed.

Q. Is the check result normal?