INSPECTION PROCEDURE C-1: Power Windows do not work at All.


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 ETACS-ECU
  • Damaged wiring harness and connectors

DIAGNOSTIC PROCEDURE


STEP 1. Check the power supply system.




  • Hazard warning lamp

Q. Is the check result normal?





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



Q. Is the diagnosis code set?





STEP 3. M.U.T.-III data list



Item No.
 Item name
 Normal condition
254
 IG Voltage
 Battery voltage
OK: Normal condition is displayed.

Q. Is the check result normal?





STEP 4. Connector check: C-309 ETACS-ECU connector


Q. Is the check result normal?





STEP 5. Voltage measurement at the C-309 ETACS-ECU connector


(1)Disconnect the connector, and measure at the wiring harness side.
(2)Measure the voltage between the C-309 ETACS-ECU connector terminal No. 1 and the body earth.
OK: Battery voltage

Q. Is the check result normal?





STEP 6. Check of the wiring harness between the C-309 ETACS-ECU connector terminal No. 1 and the fusible link (33).



  • Check the power supply line for open circuit.

Q. Is the check result normal?





STEP 7. Connector check: C-307 ETACS-ECU connector


Q. Is the check result normal?





STEP 8. Voltage measurement at the C-307 ETACS-ECU connector.


(1)Disconnect the connector, and measure at the wiring harness side.
(2)Measure the voltage between the C-307 ETACS-ECU connector terminal No. 2 and the body earth.
OK: Battery voltage

Q. Is the check result normal?





STEP 9. Check the wiring harness between C-307 ETACS-ECU connector terminal No. 2 and fusible link (34).


Q. Is the check result normal?





STEP 10. Retest the system.



Q. Is the check result normal?