INSPECTION PROCEDURE D-1: Power windows do not work at all.


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

  • 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. ECU check by using the SWS monitor
Check that the power supply and earth lines to the ETACS-ECU and the SWS communication lines are normal.

  • Turn the ignition switch to the ON position.
ECUS TO BE CHECKED
  • ETACS ECU
OK: "OK" are displayed for all the items

Q. Is the check result normal?
Go to Step 2.
Refer to Inspection Procedure A-3 "Communication with ETACS-ECU is not possible ."

Step 2. SWS monitor data list
<Selected item> ETACS
  • Ignition switch: ON
Item No.
 Item name
 Normal condition
Item 30
 Ignition SW(IG1)
 ON
OK: Normal condition is displayed.

Q. Is the check result normal?
Go to Step 3.
Refer to inspection procedure P-2 "The ignition switch (IG1) signal is not received ."

Step 3. Connector check: C-217 power window relay connector


Q. Is the check result normal?

Go to Step 4.

Repair the connector.

Step 4. Check the power window relay.
Refer to GROUP 42 - Door - On-vehicle Service .

Q. Is the check result normal?
Go to Step 5.
Replace the power window relay.

Step 5. Connector check: F-05 power window main switch connector


Q. Is the check result normal?

Go to Step 6.

Repair the connector.

Step 6. Check the power window main switch
Check that the power window main switch works normally. Refer to GROUP 42 - Door .

Q. Is the check result normal?
Go to Step 7.
Replace the power window main switch.

Step 7. Voltage measurement at the F-05 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)Voltage between terminal 10 and body earth
OK: System voltage

Q. Is the check result normal?

Go to Step 11.

Go to Step 8.

Step 8. Voltage measurement at C-217 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)Voltage between terminal 5 and body earth
OK: System voltage

Q. Is the check result normal?

Go to Step 10.

Go to Step 9.

Step 9. Check the wiring harness between C-217 power window relay connector terminal No.5 and fusible link (5).






note Prior to the wiring harness inspection, check intermediate connectors C-125 and junction block connector C-202, and repair if necessary.

  • Check the power supply line for open circuit.

Q. Is the check result normal?

The trouble can be an intermittent malfunction (Refer to GROUP 00, How to Cope with Intermittent Malfunction ).

Repair the wiring harness.

Step 10. Resistance measurement at C-217 power window relay connector.


(1)Disconnect the connector, and measure at the wiring harness side.

(2)Resistance between terminal 3 and body earth
OK: 2Ω or less

Q. Is the check result normal?

Go to Step 12.

Go to Step 11.

Step 11. Check the wiring harness between C-217 power window relay connector terminal No.3 and body earth.


note Prior to the wiring harness inspection, check junction block connector C-205, and repair if necessary.

  • Check the earth wires for open circuit.

Q. Is the check result normal?

The trouble can be an intermittent malfunction (Refer to GROUP 00, How to Cope with Intermittent Malfunction ).

Repair the wiring harness.

Step 12. Connector check: C-219 ETACS-ECU connector


Q. Is the check result normal?

Go to Step 13.

Repair the connector.

Step 13. Check the wiring harness between C-217 power window relay connector terminal No.4 and F-05 power window main switch connector terminal No.10.






note Prior to the wiring harness inspection, check joint connector C-27 <LH drive vehicles>, C-14 <RH drive vehicles> and repair if necessary.

  • Check the power supply line for open circuit.

Q. Is the check result normal?

The trouble can be an intermittent malfunction (Refer to GROUP 00, How to Cope with Intermittent Malfunction ).

Repair the harness wire, and then go to Step 14.

Step 14. Resistance measurement at the F-05 power window main switch connector.


(1)Disconnect the connector, and measure at the wiring harness side.


(2)Resistance between terminal 8 <LH drive vehicles> or 2 <RH drive vehicles> and body earth
OK: 2Ω or less

Q. Is the check result normal?

Go to Step 16.

Go to Step 15.

Step 15. Check the wiring harness between F-05 power window main switch connector terminal No.8 <LH drive vehicles> or No.2 <RH drive vehicles> and body earth.




note Prior to the wiring harness inspection, check intermediate connectors C-27 <LH drive vehicles>, C-14 <RH drive vehicles> and repair if necessary.

  • Check the earth wires for open circuit.

Q. Is the check result normal?

The trouble can be an intermittent malfunction (Refer to GROUP 00, 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 Cope with Intermittent Malfunction ).
Replace the ETACS-ECU.