Inspection Procedure 2: Driver’s power window does not work by means of the power window main switch.


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










COMMENTS ON TROUBLE SYMPTOM



PROBABLE CAUSES



  • Malfunction of the power window main switch
  • Malfunction of the driver’s door power window motor
  • Damaged harness wires and connectors

DIAGNOSIS PROCEDURE


STEP 1. Check the power window main switch.



Q. Is the check result normal?





STEP 2. Connector check: D-02 power window main switch connector


Q. Is the check result normal?





STEP 3. Voltage measurement at the D-02 power window relay connector.


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

Q. Is the check result normal?





STEP 4. Connector check: B-03 joint connector (2)


Q. Is the check result normal?





STEP 5. Check the wiring harness between B-03 joint connector (2) terminal No.5 and D-02 power window main switch connector terminal No. 10.


note Prior to the wiring harness inspection, check intermediate connector B-22 <LHD>, B-109 <RHD>, and repair if necessary.

  • Check the power supply line for open circuit.

Q. Is the check result normal?





STEP 6. Connector check: D-10 front power window motor (LH) <LHD>connector, D-07 front power window motor (RH) <RHD> connector


Q. Is the check result normal?





STEP 7. Check the power window main switch.



Q. Is the check result normal?





STEP 8. Check the front power window motor.



Q. Is the check result normal?







STEP 9. Check the wiring harness between D-02 power window main switch connector terminal Nos. 7, 9 and D-10 front power window motor (LH) <LHD> connector terminal Nos. 4, 1.



  • Check the input and output lines for open or short circuit.

Q. Is the check result normal?





STEP 10. Check the wiring harness between D-02 power window main switch connector terminal Nos. 12, 14 and D-07 front power window motor (RH) <RHD> connector terminal Nos. 4, 1.



  • Check the input and output lines for open or short circuit.

Q. Is the check result normal?





STEP 11. Retest the system.


(1)Replace the power window main switch.
(2)Check that the driver’s power window works by means of the power window main switch.

Q. Is the check result normal?