INSPECTION PROCEDURE C-1: Power Windows do not work at All.
<Not Using SWS Monitor>
| caution |
Whenever the ECU is replaced, ensure that
the input and output signal circuits are normal.
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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.
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System switch
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Check condition
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Ignition switch (IG1)
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When
turned from ACC to ON
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OK: The M.U.T.-III sounds or the voltmeter needle
fluctuates.
Q.
Is the check result normal?
Go to Step
2.
Refer to GROUP 54A,
inspection procedure C-2 "The ignition switch (IG1) signal is not
received 
."
STEP 2. Connector check: D-408 power window relay
connector
Q.
Is the check result normal?
Go to Step
3.
Repair the
connector.
STEP 3. Check the power window
relay.
Refer to .
Q.
Is the check result normal?
Go to Step
4.
Replace the power
window relay.
STEP 4. Voltage measurement at
D-408 power window relay connector.
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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)Check the voltage between the D-408 power window
relay connector terminal No.5 and body earth.
OK:
Battery positive voltage
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Q.
Is the check result normal?
Go to Step 6.
Go to Step
5.
STEP 5. Check the wiring harness between
D-408 power window relay connector terminal No.5 and fusible link
(4).
| note |
Prior to the wiring harness inspection,
check junction block connector D-403 and intermediate
connector D-238, and repair if necessary.
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- 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 use
Troubleshooting/inspection Service Points - How to Cope with
Intermittent Malfunction ).
Repair the wiring
harness.
STEP 6. Voltage measurement at
D-408 power window relay connector.
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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)Check the voltage between the D-408 power window
relay connector terminal No.1 and body earth.
OK:
Battery positive voltage
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Q.
Is the check result normal?
Go to Step 9.
Go to Step
7.
STEP 7. Connector check: D-419 ETACS-ECU
connector
Q.
Is the check result normal?
Go to Step
8.
Repair the defective
connector.
STEP 8. Check the wiring harness
between D-408 power window relay connector terminal No.1 and D-419
ETACS-ECU connector terminal No.1.
- 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 use
Troubleshooting/inspection Service Points - How to Cope with
Intermittent Malfunction ).
Repair the wiring
harness.
STEP 9. Resistance measurement at
D-408 power window relay connector.
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(1)Disconnect the connector, and measure at the
wiring harness side.
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(2)Continuity between D-408 power window relay
connector terminal No.3 and body earth
OK:
Continuity (less than 2Ω)
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Q.
Is the check result normal?
Go to Step 11.
Go to Step
10.
STEP 10. Check the wiring harness
between D-408 power window relay connector terminal No.3 and body
earth.
| note |
Prior to the wiring harness inspection,
check junction block connector D-405, and repair if
necessary.
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- 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 use
Troubleshooting/inspection Service Points - How to Cope with
Intermittent Malfunction ).
Repair the wiring
harness.
STEP 11. Connector check: F-02
power window main switch connector
Q.
Is the check result normal?
Go to Step
12.
Repair the
connector.
STEP 12. Voltage measurement at
the F-02 power window main switch connector.
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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)Check the voltage between the F-02 power window
relay connector terminal No.10 and body earth.
OK:
Battery positive voltage
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Q.
Is the check result normal?
Go to Step 14.
Go to Step
13.
STEP 13. Check the wiring harness
between D-408 power window relay connector terminal No.4 and F-02
power window main switch connector terminal No.10.
| 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.
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 ).
Repair the wiring
harness.
STEP 14. Resistance measurement at
the F-02 power window main switch connector.
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(1)Disconnect the connector, and measure at the
wiring harness side.
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(2)Check the resistance between F-02 power window
main switch connector terminal No.2 and body
earth.
OK: Continuity (less than
2Ω)
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Q.
Is the check result normal?
Go to Step 16.
Go to Step
15.
STEP 15. Check the wiring harness
between F-02 power window main switch connector terminal No.2 and
body earth.
| 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.
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 ).
Repair the wiring
harness.
STEP 16. Retest the
system.
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 use
Troubleshooting/inspection Service Points - How to Cope with
Intermittent Malfunction ).
Replace the power window main
switch.