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
Front driver's switch (Window unlock and lock):
POWER WINDOW MASTER SWITCH CONTINUITYSwitch Position Tester Connection Specified Condition UP 4 - 7 Continuity UP 1-3-9 Continuity OFF 1-3-4 Continuity OFF 1-3-9 Continuity DOWN 7 - 9 Continuity DOWN 1-3-4 Continuity Front passenger's switch (Window unlock):
POWER WINDOW MASTER SWITCH CONTINUITYSwitch Position Tester Connection Specified Condition UP 6 - 13 Continuity UP 1-3-15 Continuity OFF 1-3-13 Continuity OFF 1-3-15 Continuity DOWN 6 - 15 Continuity DOWN 1-3-13 Continuity Front passenger's switch (Window lock):
POWER WINDOW MASTER SWITCH CONTINUITYSwitch Position Tester Connection Specified Condition UP 6 - 13 Continuity OFF 13 - 15 Continuity DOWN 6 - 15 Continuity Rear left switch (Window unlock):
POWER WINDOW MASTER SWITCH CONTINUITYSwitch Position Tester Connection Specified Condition UP 6 - 12 Continuity UP 1-3-10 Continuity OFF 1-3-12 Continuity OFF 1-3-10 Continuity DOWN 6 - 10 Continuity DOWN 1-3-12 Continuity Rear left switch (Window lock):
POWER WINDOW MASTER SWITCH CONTINUITYSwitch Position Tester Connection Specified Condition UP 6 - 12 Continuity OFF 10 - 12 Continuity DOWN 6 - 10 Continuity Rear right switch (Window unlock):
POWER WINDOW MASTER SWITCH CONTINUITYSwitch Position Tester Connection Specified Condition UP 6 - 18 Continuity UP 1-3-16 Continuity OFF 1-3-18 Continuity OFF 1-3-16 Continuity DOWN 6 - 16 Continuity DOWN 1-3-18 Continuity Rear right switch (Window lock):
POWER WINDOW MASTER SWITCH CONTINUITYSwitch Position Tester Connection Specified Condition UP 6 - 18 Continuity OFF 16 - 18 Continuity DOWN 6 - 16 Continuity If continuity and voltage is not as specified, replace the master switch.
- Using an ammeter:
- INSPECT ONE TOUCH POWER WINDOW SYSTEM/ CURRENT OF CIRCUIT
- 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
REAR POWER WINDOW SWITCH CONTINUITYSwitch Position Tester Connection Specified Condition UP 1 - 2 Continuity UP 3 - 4 Continuity OFF 1 - 2 Continuity OFF 3 - 5 Continuity DOWN 1 - 4 Continuity DOWN 3 - 5 Continuity If continuity is not as specified, replace the switch.
- Front left side door and rear right side door:
- INSPECT POWER WINDOW MOTOR OPERATION
- Connect the positive (+) lead from the battery to terminal 4 and the negative (-) lead to terminal 5, check that the motor turns clockwise.
- Reverse the polarity, check that the motor turns counterclockwise.
If operation is not as specified, replace the motor.
- Front right side door and rear left side door:
- INSPECT POWER WINDOW MOTOR OPERATION
- Connect the positive (+) lead from the battery to terminal 5 and the negative (-) lead to terminal 4, check that the motor turns clockwise.
- Reverse the polarity, check that the motor turns counterclockwise.
If operation is not as specified, replace the motor.
- INSPECT POWER WINDOW MOTOR PTC THERMISTOR OPERATION
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
- Disconnect the connector from the Driver door Window motor.
- Connect the positive (+) lead from the ammeter to terminal 5 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 4 on the wire harness side connector, and raise the window to the fully position.
- Continue to apply voltage, and check that the current changes to less than 1 A within 4 to 90 seconds.
- Disconnect the leads from the terminals.
- Approximately 60 seconds later, connect the positive (+) lead from the battery to terminal 5 and the negative (-) lead to terminal 4, and check that the window begins to descend.
If operation is not as specified, replace the motor.
- Window up:
- INSPECT FRONT WINDOW JAM PROTECTION LIMIT SWITCH OPERATION
- Disconnect the connector from the master switch.
- Connect the positive (+) lead from the ohmmeter to terminal 17 and the negative (-) lead to terminal 2.
- Connect the positive (+) lead from the battery to terminal 4 and the negative (-) lead to terminal 9.
- Check that the continuity exists when the window goes up.
- Check that the no continuity exists when the window is in the fully closed position.
If operation is not as specified, replace the motor.
- Window down:
- INSPECT FRONT WINDOW JAM PROTECTION LIMIT SWITCH OPERATION
- Connect the positive (+) lead from the ohmmeter to terminal 17 and the negative (-) lead to terminal 2.
- Connect the positive (+) lead from the battery to terminal 9 and the negative (-) lead to terminal 4.
- Check that the continuity exists when the window goes up.
- Check that the no continuity exists when the window is in the fully opened position.
NOTE: If connecting the wire harness wrongly, the sensor might be damaged so caution is necessary. - INSPECT FRONT WINDOW JAM PROTECTION PULSE SWITCH OPERATION
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
- Connect the positive (+) lead from the electrical tester to terminal 14 and the negative (-) lead to terminal 2.
- Connect the positive (+) lead from the battery to terminal 4 and the negative (-) lead to terminal 9.
- Check that pulse is generated during the motor running.
- Reverse the polarity and check that the pulse is generated.
If operation is not as specified, replace the motor.
NOTE: If connecting the wire harness wrongly, the sensor might be damaged so caution is necessary. - INSPECT POWER RELAY CONTINUITY POWER RELAY CONTINUITY
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.
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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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