INSPECTION PROCEDURE 3: Relevant power window(s) does not work by means of the front and rear passenger’s power window sub switches.
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Before replacing the ECU, ensure that the power supply circuit, the earth circuit and the communication circuit are normal.
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COMMENTS ON TROUBLE SYMPTOM
If the front passenger’s or rear power window(s) do not work by means of the respective power window sub switch, a malfunction of the power window sub switch or the power window motor is suspected. Also, the power window lock switch ON signal may be sent from the power window main switch, because the power window lock switch of the power window main switch is ON, or the power window main switch has a malfunction.
PROBABLE CAUSES
- Malfunction of front passenger’s or rear passenger’s power window sub switch(es)
- Malfunction of front passenger’s or rear passenger’s power window motor(s)
- Damaged wiring harness and connectors
DIAGNOSIS PROCEDURE
STEP 1. Check the power window main switch.
Check that the power window lock switch is turned off.
Q.
Is the check result normal?
Go to Step 2.
Turn off the power window lock switch.
STEP 2. M.U.T.-III diagnosis code
Check that ETACS-ECU sets a diagnosis code.
Q.
Is the diagnosis code set?
Refer to GROUP 54A - Diagnosis Code Chart 
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Go to Step 3.
STEP 3. Determine a trouble spot.
Q.
Which power window does not work?
Front passenger’s door
: Go to Step 4.
Rear right door : Go to Step 10.
Rear left door : Go to Step 16.
STEP 4. Check the front power window sub switch
Check that the front power window sub switch works normally. Refer to Power Window Sub Switch Continuity Check .
Q.
Is the check result normal?
Go to Step 5.
Replace the front power window sub switch.
STEP 5. Check the front power window motor (LH)
Check that the front power window motor (LH) works normally. Refer to Power Window Motor Continuity Check .
Q.
Is the check result normal?
Go to Step 6.
Replace the front power window motor (LH).
STEP 6. Voltage measurement at front power window sub switch connector (power supply line)
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(1)Disconnect the connector, and measure at the wiring harness side.
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(2)Turn the ignition switch to the ON position.
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(3)Measure the voltage between the front power window sub switch connector (power supply line) and the body earth.
OK: System voltage
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Q.
Is the check result normal?
Go to Step 8.
Go to Step 7.
STEP 7. Check of short to power supply, short to earth, and open circuit in power supply line between the front power window sub switch connector and the power window relay connector
Q.
Is the check result normal?
Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction ).
Repair the wiring harness.
STEP 8. Check of short to power supply, short to earth, and open circuit in input/output line between the front power window sub switch connector and the front power window motor (LH) connector
Q.
Is the check result normal?
Go to Step 9.
Repair the wiring harness.
STEP 9. Retest the system.
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(1)Check that the front passenger’s door power window can be operated by the front power window sub switch.
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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 ).
Go to Step 4.
STEP 10. Check the rear power window sub switch (RH)
Check that the rear power window sub switch (RH) works normally. Refer to Power Window Sub Switch Continuity Check .
Q.
Is the check result normal?
Go to Step 11.
Replace the rear power window sub switch (RH).
STEP 11. Check the rear power window motor (RH)
Check that the rear power window motor (RH) works normally. Refer to Power Window Motor Continuity Check .
Q.
Is the check result normal?
Go to Step 12.
Replace the rear power window motor (RH).
STEP 12. Voltage measurement at rear power window sub switch (RH) connector (power supply line)
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(1)Disconnect the connector, and measure at the wiring harness side.
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(2)Turn the ignition switch to the ON position.
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(3)Measure the voltage between the rear power window sub switch (RH) connector (power supply line) and the body earth.
OK: System voltage
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Q.
Is the check result normal?
Go to Step 14.
Go to Step 13.
STEP 13. Check of short to power supply, short to earth, and open circuit in power supply line between the rear power window sub switch (RH) connector and the power window relay connector
Q.
Is the check result normal?
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. Check of short to power supply, short to earth, and open circuit in input/output line between the rear power window sub switch (RH) connector and the rear power window motor (RH) connector
Q.
Is the check result normal?
Go to Step 15.
Repair the wiring harness.
STEP 15. Retest the system.
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(1)Check that the rear right door power window can be operated by the rear power window sub switch (RH).
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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 ).
Go to Step 10.
STEP 16. Check the rear power window sub switch (LH)
Check that the rear power window sub switch (LH) works normally. Refer to Power Window Sub Switch Continuity Check .
Q.
Is the check result normal?
Go to Step 17.
Replace the rear power window sub switch (LH).
STEP 17. Check the rear power window motor (LH)
Check that the rear power window motor (LH) works normally. Refer to Power Window Motor Continuity Check .
Q.
Is the check result normal?
Go to Step 18.
Replace the rear power window motor (LH).
STEP 18. Voltage measurement at rear power window sub switch (LH) connector (power supply line)
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(1)Disconnect the connector, and measure at the wiring harness side.
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(2)Turn the ignition switch to the ON position.
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(3)Measure the voltage between the rear power window sub switch (LH) connector (power supply line) and the body earth.
OK: System voltage
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Q.
Is the check result normal?
Go to Step 20.
Go to Step 19.
STEP 19. Check of short to power supply, short to earth, and open circuit in power supply line between the rear power window sub switch (LH) connector and the power window relay connector
Q.
Is the check result normal?
Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction ).
Repair the wiring harness.
STEP 20. Check of short to power supply, short to earth, and open circuit in input/output line between the rear power window sub switch (LH) connector and the rear power window motor (LH) connector
Q.
Is the check result normal?
Go to Step 21.
Repair the wiring harness.
STEP 21. Retest the system.
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(1)Check that the rear left door power window can be operated by the rear power window sub switch (LH).
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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 ).
Go to Step 16.