Inspection Procedure C-9: When the power window main switch is operated,
the switch signals are not received. <Vehicles for South
Africa>
![](../../../img/54/W7B54X043A00ENG.png)
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![](../../../img/54/AC607609AP00ENG.png)
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![](../../../img/54/AC607707AC00ENG.png)
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caution |
Whenever the ECU is replaced, ensure that the input
signal circuit is normal.
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COMMENTS ON TROUBLE SYMPTOM
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Input signal from the power window main switch
is used in order to check the power window main switch and confirm how the
system is communicating with the ETACS-ECU. If the communication line is
defective, the power windows will not work normally.
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- Malfunction of the power window main switch
- Damaged harness wires and connectors
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STEP 1. Check the operation by using the power window main
switch.
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Check if each window can be operated by means
of the power window main switch.
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Q.
Can each power window be operated by means of the power window main
switch?
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Go to Step 2.
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Go to Step 5.
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STEP 2. Connector check: D-420 ETACS-ECU connector, F-02 power window
main switch connector
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Q.
Is the check result normal?
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Go to Step 3.
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Repair
the defective connector.
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STEP 3. Check the wiring harness between D-420 ETACS-ECU connector
terminal No.59 and F-02 power window main switch connector terminal
No.4.
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note |
Prior to the wiring harness inspection, check
intermediate connector D-114, and repair if necessary.
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- Check the communication lines for open circuit.
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Q.
Is the check result normal?
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Go to Step 4.
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Repair
the wiring harness.
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STEP 4. Replace the power window main switch, and then retest the
system.
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Replace the power window main switch, and check
that the power window main switch signal is received.
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(1)Replace the power window main switch.
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(2)Check that the power window main switch signal is
received.
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Q.
Is the check result normal?
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The
procedure is complete.
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Replace the ETACS-ECU.
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STEP 5. Voltage measurement at F-02 power window main switch
connector.
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(1)Remove the power window main switch, 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)Voltage between F-02 power window main switch connector
terminal No.6 and body earth OK: System voltage
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Q.
Is the check result normal?
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Go to Step 8.
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Go to Step 6.
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STEP 6. Connector check: D-408 power window relay
connector
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Q.
Is the check result normal?
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Go to Step 7.
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Repair
the defective connector.
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STEP 7. Check the wiring harness between D-408 power window relay
connector terminal No.4 and F-02 power window main switch connector
terminal No.6.
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note |
Prior to the wiring harness inspection, check
intermediate connector D-114 and junction block connector D-403, and
repair if necessary.
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- Check the power supply line for open circuit.
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Q.
Is the check result normal?
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The
trouble can be an intermittent malfunction (Refer to GROUP 00 - How
to Cope with Intermittent Malfunction ).
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Repair
the wiring harness.
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STEP 8. Resistance measurement at F-02 power window main switch
connector.
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(1)Remove the power window main switch, and measure at the
wiring harness side.
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(2)Resistance between F-02 power window main switch connector
terminal No.2 and body earth OK: Continuity exists (2 Ω
or less)
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Q.
Is the check result normal?
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Go to Step 10.
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Go to Step 9.
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STEP 9. Check the wiring harness between F-02 power window main switch
connector terminal No.2 and body earth.
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note |
Prior to the wiring harness inspection, check
intermediate connector D-114, and repair if necessary.
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- Check the earth wires for open circuit.
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Q.
Is the check result normal?
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The
trouble can be an intermittent malfunction (Refer to GROUP 00 - How
to Cope with Intermittent Malfunction ).
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Repair
the wiring harness.
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STEP 10. Retest the system.
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Check that each switch signal is received by
operating the power window main switch.
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Q.
Is the check result normal?
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The
trouble can be an intermittent malfunction (Refer to GROUP 00 - How
to Cope with Intermittent Malfunction ).
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Replace the power window main
switch.
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