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. Pulse check
Check the input signal from the ignition switch.
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?
Go to Step 2.
Refer to Inspection Procedure A-2 "When the ignition switch is at the LOCK (OFF) position, the functions do not work normally. Check the battery power supply circuit to the ETACS-ECU ."

Step 2. Connector check: F-05 power window main switch connector.

Q. Is the check result normal?

Go to Step 3.

Repair the defective connector.

Step 3. Voltage measurement at the F-05 power window main switch connector.

(1)Disconnect the connector, and measure at the wiring harness side.
(2)Ignition switch: ON

(3)Voltage between F-05 power window main switch connector terminal No.6 and body earth.
OK: System voltage

Q. Is the check result normal?

Go to Step 12.

Go to Step 4.

Step 4. Connector check: C-217 power window relay connector.

Q. Is the check result normal?

Go to Step 5.

Repair the defective connector.

Step 5. Check the power window relay.
Refer to GROUP 42 - Door .

Q. Is the check result normal?
Go to Step 6.
Replace the power window relay.

Step 6. Voltage measurement at the C-217 power window relay connector.

(1)Remove the power window relay, and measure at the junction block side.

(2)Voltage between C-217 power window relay connector terminal No.5 and body earth.
OK: System voltage

Q. Is the check result normal?

Go to Step 8.

Go to Step 7.

Step 7. Check the wiring harness between C-217 power window relay connector terminal No.5 to 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 8. Resistance measurement at the C-217 power window relay connector.

(1)Remove the power window relay, and measure at the junction block side.

(2)Resistance between C-217 power window relay connector terminal No.3 and body earth.
OK: 2 Ω or less

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.3 to 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 10. Connector check: C-219 ETACS-ECU connector.

Q. Is the check result normal?

Go to Step 11.

Repair the defective connector.

Step 11. Check the wiring harness between C-217 power window relay connector terminal No.4 to F-05 power window main switch connector terminal No.6.



note Prior to the wiring harness inspection, check intermediate connectors C-14 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 12. 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 F-05 power window main switch connector terminal No.2 and body earth.
OK: 2 Ω or less

Q. Is the check result normal?

Go to Step 14.

Go to Step 13.

Step 13. Check the wiring harness between F-05 power window main switch connector terminal No.2 to body earth.


note Prior to the wiring harness inspection, check intermediate connectors C-14, 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 14. Connector check: C-221 ETACS-ECU connector.

Q. Is the check result normal?

Go to Step 15.

Repair the defective connector.

Step 15. Check the wiring harness between C-221 ETACS-ECU connector terminal No.59 to F-05 power window main switch connector terminal No.4.



note Prior to the wiring harness inspection, check intermediate connectors C-14 and joint connector C-01, and repair if necessary.

  • Check the communication lines for open circuit.

Q. Is the check result normal?

Go to Step 16.

Repair the wiring harness.

Step 16. Retest the system.
After the power window main switch is replaced, check that all the power windows work.
(1)Replace the power window main switch.
(2)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.