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


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






















COMMENTS ON TROUBLE SYMPTOM


If the power windows do not work at all, the power window relay, the power window main switch or the ETACS-ECU may be defective.

POSSIBLE CAUSES



Diagnostic procedure


STEP 1. ECU check on the SWS monitor.


Check that the power supply and earth lines to the ETACS-ECU and the SWS communication lines are normal.

ECU TO BE CHECKED
OK: "OK" are displayed for all the items.

Q. Is the check result normal?

Go to Step 2.

Refer to GROUP 54C, inspection procedure 2 "Communication with ETACS-ECU is not possible ."

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


Q. Is the check result normal?

Go to Step 3.

Repair the connector.

STEP 3. Check the power window relay.


Refer to .

Q. Is the check result normal?

Go to Step 4.

Replace the power window relay.

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: Battery positive voltage

Q. Is the check result normal?

Go to Step 6.

Go to Step 5.

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 intermediate connector D-238, and repair if necessary.

Q. Is the check result normal?

The trouble can be an intermittent malfunction (Refer to GROUP 00, How to use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction ).

Repair the wiring harness.

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: Battery positive voltage

Q. Is the check result normal?

Go to Step 9.

Go to Step 7.

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


Q. Is the check result normal?

Go to Step 8.

Repair the defective connector.

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.



Q. Is the check result normal?

The trouble can be an intermittent malfunction (Refer to GROUP 00, How to use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction ).

Repair the wiring harness.

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 (less than 2Ω)

Q. Is the check result normal?

Go to Step 11.

Go to Step 10.

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.

Q. Is the check result normal?

The trouble can be an intermittent malfunction (Refer to GROUP 00, How to use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction ).

Repair the wiring harness.

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


Q. Is the check result normal?

Go to Step 12.

Repair the connector.

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: Battery positive voltage

Q. Is the check result normal?

Go to Step 14.

Go to Step 13.

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.10.


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.

Q. Is the check result normal?

The trouble can be an intermittent malfunction (Refer to GROUP 00, How to use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction ).

Repair the wiring harness.

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.8 <LH drive vehicles>, No.2 <RH drive vehicles> and body earth.
OK: Continuity (less than 2Ω)

Q. Is the check result normal?

Go to Step 16.

Go to Step 15.

STEP 15. Check the wiring harness between F-02 power window main switch connector terminal No.8 <LH drive vehicles>, No.2 <RH drive vehicles> 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.

Q. Is the check result normal?

The trouble can be an intermittent malfunction (Refer to GROUP 00, How to use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction ).

Repair the wiring harness.

STEP 16. Retest the system.


Check that the all the power windows work.

Q. Is the check result normal?

The trouble can be an intermittent malfunction (Refer to GROUP 00, How to use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction ).

Replace the power window main switch.