Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Power Window Control System: Inspection
- INSPECT POWER WINDOW MASTER SWITCH CONTINUITYÂ SPECIFICATION CONDITION CHART
Switch position Tester connection Specified condition UP 2 - 9, 17 - 18 Continuity OFF 9 - 17, 17 - 18 Continuity DOWN 2 - 18, 9 - 17 Continuity DOWN AUTO 2 - 18, 9 - 17 Continuity SPECIFICATION CONDITION CHARTSwitch position Tester connection Specified condition UP 1 - 11, 10 - 17 Continuity OFF 1 - 17, 10 - 17 Continuity DOWN 10 - 11, 1 - 17 Continuity SPECIFICATION CONDITION CHARTSwitch position Tester connection Specified condition UP 1 - 11 Continuity OFF 1 - 10 Continuity DOWN 10 - 11 Continuity If continuity is not as specified, replace the switch.
- INSPECT POWER MAIN RELAY CONTINUITYÂ SPECIFICATION CONDITION CHART
Condition Tester connection Specified condition Constant 1 - 2 Continuity Apply B+ between terminals 1 and 2. 3 - 5 Continuity If continuity is not as specified, replace the relay.
- Driver's door:Â
- INSPECT POWER WINDOW MOTOR OPERATIONÂ
- Connect the battery positive (+) lead to terminal 1 and the battery negative (-) lead to terminal 2, then check that the motor turns clockwise.
- Reverse the polarity, check that the motor turns counterclockwise.
If operation is not as specified, replace the motor.
- Passenger's door:Â
- INSPECT POWER WINDOW MOTOR OPERATIONÂ
- Connect the battery positive (+) lead to terminal 1 and the battery negative (-) lead to terminal 2, check that the motor turns clockwise.
- Reverse the polarity, and check that the motor turns counterclockwise.
If operation is not as specified, replace the motor.
- Driver's door:Â
- INSPECT PTC OPERATIONÂ
- Disconnect the connector from the window motor.
- Connect the ammeter positive (+) lead to terminal 1 of the wire harness side connector and the negative (-) lead to ammeter negative terminal of the battery.
- Connect the battery positive (+) lead to terminal 2 of the wire harness side connector, and raise the window to the fully closed position.
- Continue to apply voltage, and check that the current changes from approximately 14 A to less than 1 A within 4 to 90 seconds.
- Disconnect the leads from terminals.
- Approximately 90 seconds later, connect the battery positive (+) lead to terminal 1 and battery negative (-) lead to terminal 2, then check that the window begins to descend.
If operation is not as specified, replace the motor.
- Passenger's door:Â
- INSPECT PTC OPERATIONÂ
- Disconnect the connector from the power window switch.
- Connect the ammeter positive (+) lead to terminal 1 of the wire harness side connector and the ammeter negative (-) lead to negative terminal of the battery.
- Connect the positive (+) lead from the battery to terminal 2 of the wire harness side connector, and raise the window to the fully closed position.
- Continue to apply voltage, and check that the current changes from approximately 14 A to less than 1 A within 4 to 90 seconds.
- Disconnect the leads from terminals.
- Approximately 90 seconds later, connect the battery positive (+) lead to terminal 1 and the battery negative (-) lead to terminal 2, then check that the window begins to descend.
If operation is not as specified, replace the motor.
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.