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STEP
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INSPECTION
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ACTION
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1
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INSPECT WHETHER POWER WINDOW MAIN SWITCH ENTER FAIL-SAFE MODE OR NOT
• Did the driver-side front window go up or down in automatic mode?
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Yes
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Recheck malfunction symptoms.
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No
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Go to the next step. (Power window main switch may enter fail-safe mode.)
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2*
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VERIFY WHETHER MALFUNCTION IS IN WIRING HARNESS (BETWEEN POWER WINDOW MAIN SWITCH AND DRIVER-SIDE FRONT POWER WINDOW MOTOR) OR ELSEWHERE
• Test the voltage at the power window main switch terminal 2B (limit switch signal).
• Is the voltage approximately 5 V when the driver-side front window is closed completely and 0 V when it is opened halfway?
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Yes
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Go to Step 6.
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No
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Go to the next step.
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3*
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VERIFY WHETHER MALFUNCTION IS IN DRIVER-SIDE FRONT POWER WINDOW MOTOR OR ELSEWHERE
• Turn the ignition switch to LOCK position.
• Disconnect the driver-side front power window motor.
• Turn the ignition switch to ON position.
• Connect circuit tester negative probe to driver-side front power window motor connector terminal B, because it will be possible to inspect motor connector terminal 2C (ground signal) line as well.
• Measure the voltage at driver-side front power window motor terminal F (limit switch signal).
• Is the voltage approximately 5 V?
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Yes
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Replace the driver-side front power window motor (open circuit or short to B+ in motor), then go to Step 11.
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No
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Go to the next step.
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4*
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INSPECT WIRING HARNESS BETWEEN POWER WINDOW MAIN SWITCH AND DRIVER-SIDE FRONT POWER WINDOW MOTOR FOR CONTINUITY
• Turn the ignition switch to LOCK position.
• Disconnect the power window main switch connector.
• Is there continuity between the following power window main switch connector terminals and driver-side front power window motor terminals?
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- 2B-F (limit switch signal)
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- 2C-B (ground signal)
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Yes
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Go to the next step.
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No
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Repair the wiring harness between the power window main switch and the driver-side front power window motor, then go to Step 11.
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5*
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VERIFY WHETHER MALFUNCTION IS IN WIRING HARNESS (BETWEEN POWER WINDOW MAIN SWITCH AND DRIVER-SIDE FRONT POWER WINDOW MOTOR) OR POWER WINDOW MAIN SWITCH
• Turn the ignition switch to ON position.
• Measure the voltage at the following power window main switch terminals:
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- 2B (limit switch signal)
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- 2C (ground signal)
• Is the voltage approximately 12 V?
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Yes
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Repair the wiring harness between the power window main switch and the driver-side front power window motor, then go to Step 11.
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No
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Replace the power window main switch (open circuit or short to B+ in power window main switch).
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6*
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VERIFY WHETHER MALFUNCTION IS IN POWER WINDOW MAIN SWITCH OR ELSEWHERE
• Test the voltage at power window main switch terminal 2D (pulse generator signal).
• Does the voltage alternate between 0 V and approximately 5 V when the driver-side front window is being closed from the completely open position?
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Yes
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Replace the power window main switch. (malfunction in power window main switch automatic mode control), then go to Step 11.
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No
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Go to the next step.
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7*
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VERIFY WHETHER MALFUNCTION IS IN DRIVER-SIDE FRONT POWER WINDOW MOTOR OR ELSEWHERE
• Turn the ignition switch to LOCK position.
• Disconnect the driver-side front power window motor.
• Measure the voltage at driver-side front power window motor terminal D (pulse generator signal).
• Is the voltage approximately 5 V?
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Yes
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Replace the driver-side front power window motor (open circuit or short to B+/ground in motor), then go to Step 11.
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No
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Go to the next step.
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8*
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VERIFY WHETHER MALFUNCTION IS IN WIRING HARNESS (BETWEEN POWER WINDOW MAIN SWITCH AND DRIVER-SIDE FRONT POWER WINDOW MOTOR) OR ELSEWHERE
• Turn the ignition switch to LOCK position.
• Disconnect the power window main switch connector and the driver-side front power window motor connector.
• Is there continuity between power window main switch terminal 2D (pulse generator signal) and driver-side front power window motor terminal D (pulse generator signal)?
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Yes
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Go to the next step.
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No
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Repair the wiring harness between power window main switch and the driver-side front power window motor, then go to Step 11.
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9*
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VERIFY WHETHER MALFUNCTION IS IN WIRING HARNESS (BETWEEN POWER WINDOW MAIN SWITCH AND DRIVER-SIDE FRONT POWER WINDOW MOTOR) OR ELSEWHERE
• Is there continuity between power window main switch terminal 2D (pulse generator signal) and ground?
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Yes
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Repair the wiring harness between the power window main switch and the driver-side front power window motor, then go to Step 11.
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No
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Go to the next step.
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10*
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VERIFY WHETHER MALFUNCTION IS IN WIRING HARNESS (BETWEEN POWER WINDOW MAIN SWITCH AND DRIVER-SIDE FRONT POWER WINDOW MOTOR) OR POWER WINDOW MAIN SWITCH
• Turn the ignition switch to ON position.
• Measure the voltage at power window main switch terminal 2D (pulse generator signal).
• Is the voltage approximately 12 V?
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Yes
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Repair the wiring harness between the power window main switch and the front driver-side power window motor, then go to the next step.
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No
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Replace power window main switch (open circuit or short to B+/ground in power window main switch), then go to the next step.
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11
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RECHECK MALFUNCTION SYMPTOM AFTER REPAIR
• Reset the driver-side front power window motor.
• Did malfunction disappear?
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Yes
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• Troubleshooting completed.
• Explain repairs to customer.
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No
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Recheck malfunction symptoms, then repeat from Step 1 if malfunction recurs.
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