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.
Auto Down/Up Operation
The signals are input to terminals MDN and AUTO of the driver door ECU when the power window master switch is pressed 2 steps. See WIRING DIAGRAMS . According to these signals, it is determined that the driver door ECU is in the auto mode. The current flows from terminal DN into the front LH power window motor to terminal UP of the driver door ECU to GROUND, to rotate the motor and automatically open the window. Accordingly, when each window switch of the power window master switch is pressed, the window of the relevant door is automatically opened through communication control of the body ECUs and door ECUs etc.
The signals are input to terminals MUP and AUTO of the driver door ECU when the power window master switch is pulled 2 steps. According to these signals, it is determined that the driver door ECU is in the auto mode. The current flows from terminal UP into the front LH power window motor to terminal UP of the driver door ECU to GROUND, to rotate the motor and automatically open the window. Accordingly, when each window switch of the power window master switch is pressed, the window of the relevant door is automatically opened through communication control of the body ECUs and door ECUs etc.
For other windows, as each power window control switch is operated, the window of the relevant door is automatically opened or closed.
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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.