INSPECTION PROCEDURE 3: Relevant power window(s) does not work by means of the front and rear passenger’s power window sub switches.
| caution |
Before replacing the ECU, ensure that the power supply circuit, the earth circuit and the communication circuit are normal.
|
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 
.
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 12.
Rear left door : Go to Step 18.
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?
YES <LHD> : Go to Step 5.
YES <RHD> : Go to Step 6.
Replace the front power window sub switch.
STEP 5. Check the front power window motor (RH) <LHD>
Check that the front power window motor (RH) <LHD> works normally. Refer to Power Window Motor Continuity Check .
Q.
Is the check result normal?
Go to Step 7.
Replace the front power window motor (RH) <LHD>.
STEP 6. Check the front power window motor (LH) <RHD>
Check that the front power window motor (LH) <RHD> works normally. Refer to Power Window Motor Continuity Check .
Q.
Is the check result normal?
Go to Step 7.
Replace the front power window motor (LH) <RHD>.
STEP 7. Voltage measurement at front power window sub switch connector (power supply line)
|
|
(1)Disconnect the connector, and measure at the wiring harness side.
|
|
|
(2)Turn the ignition switch to the ON position.
|
|
|
(3)Measure the voltage between the front power window sub switch connector (power supply line) and the body earth.
OK: System voltage
|
Q.
Is the check result normal?
YES <LHD> : Go to Step 9.
YES <RHD> : Go to Step 10.
Go to Step 8.
STEP 8. 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 9. 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 (RH) <LHD> connector
Q.
Is the check result normal?
Go to Step 11.
Repair the wiring harness.
STEP 10. 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) <RHD> connector
Q.
Is the check result normal?
Go to Step 11.
Repair the wiring harness.
STEP 11. Retest the system.
|
|
(1)Check that the front passenger’s door power window can be operated by the front power window sub switch.
|
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 12. 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 13.
Replace the rear power window sub switch (RH).
STEP 13. 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 14.
Replace the rear power window motor (RH).
STEP 14. Voltage measurement at rear power window sub switch (RH) connector (power supply line)
|
|
(1)Disconnect the connector, and measure at the wiring harness side.
|
|
|
(2)Turn the ignition switch to the ON position.
|
|
|
(3)Measure the voltage between the rear power window sub switch (RH) connector (power supply line) and the body earth.
OK: System voltage
|
Q.
Is the check result normal?
Go to Step 16.
Go to Step 15.
STEP 15. 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 16. 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 17.
Repair the wiring harness.
STEP 17. Retest the system.
|
|
(1)Check that the rear right door power window can be operated by the rear power window sub switch (RH).
|
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 12.
STEP 18. 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 19.
Replace the rear power window sub switch (LH).
STEP 19. 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 20.
Replace the rear power window motor (LH).
STEP 20. Voltage measurement at rear power window sub switch (LH) connector (power supply line)
|
|
(1)Disconnect the connector, and measure at the wiring harness side.
|
|
|
(2)Turn the ignition switch to the ON position.
|
|
|
(3)Measure the voltage between the rear power window sub switch (LH) connector (power supply line) and the body earth.
OK: System voltage
|
Q.
Is the check result normal?
Go to Step 22.
Go to Step 21.
STEP 21. 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 22. 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 23.
Repair the wiring harness.
STEP 23. Retest the system.
|
|
(1)Check that the rear left door power window can be operated by the rear power window sub switch (LH).
|
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 18.