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
- 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 1 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 14 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.
HINT:
The PTC opens some 4 - 90 seconds after the window stops going down, so that check must be made before the PTC operates.
If the operation is as specified, replace the driver door ECU.
- Using an ammeter with a current-measuring probe:
INSPECT ONE TOUCH POWER WINDOW SYSTEM/ CURRENT OF CIRCUIT
- Remove the driver door ECU with connectors connected.
- Attach a current-measuring probe to terminal 25 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.
HINT:
The PTC opens some 4 - 90 seconds after the window stops going down, so that check must be made before the PTC operates.
If operation is as specified, replace the driver door ECU.
- INSPECT REAR POWER WINDOW SWITCH CONTINUITY CONTINUITY CONDITION
Switch position Tester connection Specified condition UP 5 - 4, 2 - 6 Continuity OFF 4 - 6, 2 - 6 No continuity DOWN 2 -5, 4 - 6 Continuity If continuity is not as specified, replace the switch.
- INSPECT POWER MAIN RELAY CONTINUITY CONTINUITY CONDITION
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:
INSPECT POWER WINDOW MOTOR OPERATION
- Connect the positive (+) lead from the battery to terminal 1 and the negative (-) lead to terminal 2, and check that the motor turns clockwise.
- Reverse the polarity, check that the motor turns counterclockwise.
If operation is not as specified, replace the motor.
NOTE: Since the jam protection may not work properly be sure to conduct procedures described in "HOW TO RESET POWER MOTOR (RESET AND PULSE SWITCH)" after this inspection.
Use the Manual With the Right Hardware
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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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