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.
Terminals Of Ecu
- CHECK POWER WINDOW REGULATOR MASTER SWITCH (DRIVER SIDE)Β
Courtesy of Β© TOYOTA, LICENSE AGREEMENT TMS1002
- Disconnect the P9 switch connector.
- Measure the voltage and resistance of the wire harness side connector.
Standard:Β
POWER WINDOW REGULATOR MASTER SWITCH (DRIVER SIDE) TERMINAL VOLTAGESymbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition GND (P9-2) - Body ground W-B - Body ground Ground Always Below 1 Ξ© B (P9-10) - GND (P9-2) B - W-B +B (B) power supply Always 10 to 14 V IG (P9-20) - GND (P9-2) R - W-B Ignition power supply Ignition switch OFF -> ON 0 V -> 10 to 14 V If the result is not as specified, there may be a malfunction on the wire harness side.
- Reconnect the P9 switch connector.
- Reset the power window motor (See INITIALIZATION ).
- Measure the voltage of the connector.
Standard:Β
If the result is not as specified, the master switch may have a malfunction.
- CHECK POWER WINDOW REGULATOR SWITCH (PASSENGER SIDE)Β
Courtesy of Β© TOYOTA, LICENSE AGREEMENT TMS1002
- Disconnect the P12 switch connector.
- Measure the voltage and resistance of the wire harness side connector.
Standard:Β
POWER WINDOW REGULATOR SWITCH (PASSENGER SIDE) TERMINAL VOLTAGESymbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition GND (P12-7) - Body ground W-B - Body ground Ground Always Below 1 Ξ© B (P12-12) - GND (P12-7) P - W-B +B (B) power supply Always 10 to 14 V If the result is not as specified, there may be a malfunction on the wire harness side.
- Reconnect the P12 switch connector.
- Reset the power window motor (See INITIALIZATION ).
- Measure the voltage of the connector.
Standard:Β
If the result is not as specified, the regulator switch may have a malfunction.
HINT:
*: An operation permission signal is output from terminal PCT of the master switch to the power window regulator switch. If the value is not as specified, there may be a malfunction on the wire harness side. An operation permission signal is also output through the MPX line to the power window regulator switch. Even if both signals are not output, the power windows will function normally.
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:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.
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