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 continuity
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Front driver's switch (Window unlock and lock)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Front passenger's switch (Window unlock):
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Front passenger's switch (Window lock):
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Rear left switch (Window unlock):
Rear left switch (Window lock):
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Rear right switch (Window unlock):
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Rear right switch (Window lock):
If continuity and voltage is not as specified, replace the master switch.
- Using an ammeter: Inspect one touch power window system/current of circuit
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- Disconnect the connector from the master switch.
- Connect the positive (+) lead from the ammeter to terminal 4 on the wire harness side connector and the negative (-) lead to negative (-) terminal of the battery.
- Connect the positive (+) lead from the battery to terminal 9 on the wire harness side connector.
- As the window goes down, check that the current flow is approximately 7 A.
- Check that the current increases up to approximately 14.5 A or more when the window stops going down.
NOTE: The circuit breaker opens some 4 - 40 seconds after the window stops going down, so that check must be made before the circuit breaker operates.If the operation is not as specified, replace the master switch.
- Using an ammeter with a current-measuring probe: Inspect one touch power window system/current of circuit
- Remove the master switch with connector connected.
- Attach a current-measuring probe to terminal 5 of the wire harness.
- Turn the ignition switch ON and set the power window switch in the down position.
- As the window goes down, check that the current flow is approximately 7 A.
- Check that the current increases up to approximately 14.5 A or more when the window stops going down.
NOTE: The circuit breaker opens some 4 - 40 seconds after the window stops going down, so that check must be made before the circuit breaker operates.If the operation is not as specified, replace the master switch.
- Passenger's and rear switch: Inspect passenger's and rear power window switch continuity
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.
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