Auto Down/Up Operation

WARNING: This page is about a different car, the 2002 Lexus GS 430 and 2002 Lexus GS 300. However, it is still accessible from the selected car via links, so may be relevant.

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.