Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual: System Description

Multiplex Network Master Switch Assembly

Power Window Regulator Switch Assembly

Rear Power Window Regulator Switch Assembly

Power Window Regulator Motor Assembly

Manual up and down function

Function that causes the power window to go up while the power window switch is being pulled halfway up and to go down while it is being pushed halfway down. the power window stops as soon as the switch is released.

Auto up and down function

Function that enables the power window of each door to be fully opened or closed by one full pull or push of the multiplex network master switch assembly, power window regulator switch assembly or rear power window regulator switch assembly.

Window lock function

Jam protection function

Function that automatically stops the power window and moves it downward if a foreign object gets jammed between the door and door glass during auto up or manual up operation.

Catch protection function

Function that automatically stops the power window if something gets caught between the door and door glass during auto down or manual down operation.

Remote control function

Function that allows the multiplex network master switch assembly to control manual and auto up and down operations of the front passenger door power window and rear door power windows.

Key-off operation function

HINT:

If a power window is being operated by auto operation while the key-off operation function is on, and the driver door or passenger door is opened, the power window will stop operating.

Key-linked function*

Wireless transmitter-linked function*

When the main body ECU (multiplex network body ECU) receives an UNLOCK signal from the electrical key transmitter sub-assembly for 3 seconds or more, the main body ECU (multiplex network body ECU) sends an operation request signal to the power window ECU in each power window regulator motor assembly. As a result, the power window regulator motor assembly open all of the power windows.

Window open warning function

When the engine switch is turned from on (IG) to off and the driver door is opened with the power window open, the buzzer in the combination meter assembly sounds once and a warning message is displayed on the multi-information display.

Diagnosis

Function that allows diagnosis of the power window control system if any of the power window ECUs (built into each power window regulator motor assembly) detects a malfunction in the system.

Fail-safe