INSPECTION PROCEDURE B-1: Power Windows do not work at All. <Not Using SWS Monitor>


caution Whenever the ECU is replaced, ensure that the input and output signal circuits are normal.


























COMMENTS ON TROUBLE SYMPTOM



POSSIBLE CAUSES



  • Malfunction of the power window relay
  • Malfunction of the power window main switch
  • Malfunction of the ETACS-ECU
  • Damaged harness wires and connectors

DIAGNOSIS PROCEDURE


STEP 1. Pulse check



System switch
 Check condition
Ignition switch (IG1)
 When turned from ACC to ON
OK: The M.U.T.-III sounds or the voltmeter needle fluctuates.

Q. Is the check result normal?





STEP 2. Connector check: D-408 power window relay connector


Q. Is the check result normal?





STEP 3. Check the power window relay.



Q. Is the check result normal?





STEP 4. Voltage measurement at D-408 power window relay connector.


(1)Disconnect the connector, and measure at the wiring harness side.
(2)Turn the ignition switch to the ON position.
(3)Check the voltage between the D-408 power window relay connector terminal No.5 and body earth.
OK: System voltage

Q. Is the check result normal?





STEP 5. Check the wiring harness between D-408 power window relay connector terminal No.5 and fusible link (4).


note Prior to the wiring harness inspection, check junction block connector D-403 and intermediate connector D-238, and repair if necessary.

  • Check the power supply line for open circuit.

Q. Is the check result normal?





STEP 6. Voltage measurement at D-408 power window relay connector.


(1)Disconnect the connector, and measure at the wiring harness side.
(2)Turn the ignition switch to the ON position.
(3)Check the voltage between the D-408 power window relay connector terminal No.1 and body earth.
OK: System voltage

Q. Is the check result normal?





STEP 7. Connector check: D-419 ETACS-ECU connector


Q. Is the check result normal?





STEP 8. Check the wiring harness between D-408 power window relay connector terminal No.1 and D-419 ETACS-ECU connector terminal No.1.



  • Check the power supply line for open circuit.

Q. Is the check result normal?





STEP 9. Resistance measurement at D-408 power window relay connector.


(1)Disconnect the connector, and measure at the wiring harness side.
(2)Continuity between D-408 power window relay connector terminal No.3 and body earth
OK: Continuity exists (2Ω or less)

Q. Is the check result normal?





STEP 10. Check the wiring harness between D-408 power window relay connector terminal No.3 and body earth.


note Prior to the wiring harness inspection, check junction block connector D-405, and repair if necessary.

  • Check the earth wires for open circuit.

Q. Is the check result normal?





STEP 11. Connector check: F-02 power window main switch connector


Q. Is the check result normal?





STEP 12. Voltage measurement at the F-02 power window main switch connector.


(1)Disconnect the connector, and measure at the wiring harness side.
(2)Turn the ignition switch to the ON position.
(3)Check the voltage between the F-02 power window relay connector terminal No.10 and body earth.
OK: System voltage

Q. Is the check result normal?





STEP 13. Check the wiring harness between D-408 power window relay connector terminal No.4 and F-02 power window main switch connector terminal No.6.


note Prior to the wiring harness inspection, check intermediate connector D-133 <LH drive vehicles>, D-114 <RH drive vehicles> and junction block connector D-403, and repair if necessary.

  • Check the power supply line for open circuit.

Q. Is the check result normal?





STEP 14. Resistance measurement at the F-02 power window main switch connector.


(1)Disconnect the connector, and measure at the wiring harness side.
(2)Check the resistance between F-02 power window main switch connector terminal No.2 and body earth.
OK: Continuity exists (2Ω or less)

Q. Is the check result normal?





STEP 15. Check the wiring harness between F-02 power window main switch connector terminal No.2 and body earth.


note Prior to the wiring harness inspection, check intermediate connector D-133 <LH drive vehicles>, D-114 <RH drive vehicles> and repair if necessary.

  • Check the earth wires for open circuit.

Q. Is the check result normal?





STEP 16. Retest the system.



Q. Is the check result normal?