CAUTIONCOMMENTS 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
| System switch |
Check condition |
|---|---|
| Ignition switch (IG1) |
When turned from ACC to ON |
OK: The MUT-II/III sounds or the voltmeter needle fluctuates.
Q: Is the check result normal?
YES:
Go to Step 2
.NO: Refer to Inspection Procedure P-2 "The Ignition switch (IG1) signal is not received.
."Step 5. Measure the voltage at the E-05 power window main switch connector.
- Disconnect the connector, and measure at the wiring harness side.
- Turn the ignition switch to the ON position.
- Voltage between terminal 6 and body earth
OK: Battery positive voltage
Q: Is the check result normal?
YES:
Go to Step 9.NO: Go to Step 6
.Step 6. Check the wiring harness between C-208 power window relay connector terminal No.4 and E-05 power window main switch connector terminal No.6.
NOTE: Prior to the wiring harness inspection, check intermediate connectors C-118, E-12 and junction block connector C-203, and repair if necessary.
- Check the power supply line for open circuit.
Q: Is the check result normal?
YES:
The trouble can be an intermittent malfunction (Refer to GROUP 00, How to Cope with Intermittent Malfunction ).NO: Repair the harness wire, and then go to Step 7
.Step 7. Measure the voltage at C-208 power window relay connector.
- Disconnect the connector, and measure at the wiring harness side.
- Turn the ignition switch to the ON position.
- Voltage between terminal 5 and body earth
OK: Battery positive voltage
Q: Is the check result normal?
YES:
Go to Step 9.NO: Go to Step 8
.Step 8. Check the wiring harness between C-208 power window relay connector terminal No.5 and fusible link (5).
NOTE: Prior to the wiring harness inspection, check intermediate connector C-116 and junction block connector C-203, and repair if necessary.
- Check the power supply line for open circuit.
Q: Is the check result normal?
YES:
The trouble can be an intermittent malfunction (Refer to GROUP 00, How to Cope with Intermittent Malfunction ).NO: Repair the wiring harness.
Step 10. Check the wiring harness between C-208 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?
YES:
The trouble can be an intermittent malfunction (Refer to GROUP 00, How to Cope with Intermittent Malfunction ).NO: Repair the wiring harness.
Step 13. Check the wiring harness between C-219 ETACS-ECU connector terminal No.59 and E-05 power window main switch connector terminal No.4.
NOTE: Prior to the wiring harness inspection, check intermediate connectors C-118, E-12 and joint connector C-02, and repair if necessary.
- Check the communication lines for open circuit.
Q: Is the check result normal?
YES:
Go to Step 14.NO: Repair the wiring harness.
Step 14. Retest the system.
- Replace the power window main switch.
- Check that the all the power windows work.
Q: Is the check result normal?
YES:
The trouble can be an intermittent malfunction (Refer to GROUP 00 -
How to Cope with Intermittent Malfunction ).NO: Replace the ETACS-ECU.