Power Window Operation Linked With Door Key Lock & Unlock Switch

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.

When the ignition key is inserted into the door key cylinder on the driver or passenger side and kept turned to the lock or unlock position for approximately 1.5 seconds or longer, all the door windows can be opened or closed.

Power Window Close Operation - When the ignition key is inserted into the door key cylinder and kept turned to the lock position for 1.5 second or longer, the signal from the door key lock and unlock switch is input to terminal KL of the driver door ECU or front passenger door ECU. See WIRING DIAGRAMS . Through communication control of the body ECUs and door ECUs etc., the current flows from terminal UP of each door ECU into the power window motor to terminal DN of each door ECU to GROUND, to close all the door windows.

Power Window Open Operation - When the ignition key is inserted into the door key cylinder and kept turned to the unlock position for 1.5 seconds or longer, the signal from the door key lock and unlock switch is input to terminal KUL of the driver door ECU or front passenger door ECU. Through communication control of the body ECUs and door ECUs etc., the current flows from terminal DN of each door ECU into the power window motor to terminal UP of each door ECU to GROUND, to close all the door windows. If any of the following conditions are detected, the power window operation is stopped.

Approximately 10 seconds or longer has elapsed after starting open/close operation. Catching prevention function is activated.