Lexus RX (RX 350L, RX450h) 2016-2026 Repair Manual: System Description

Sliding roof ECU (Sliding roof drive gear sub-assembly)

Controls the rotational direction of the motor, which tilts or slides the sliding roof.

Sliding roof switch (Map light assembly)

Outputs operation signals to the sliding roof ECU (sliding roof drive gear sub-assembly).

Manual slide open and close function

This function causes the sliding roof to open (or close) when the OPEN switch (or CLOSE switch) is pressed for a maximum of 0.3 seconds. The sliding roof stops as soon as the switch is released.

Auto slide open and close function

This function causes the sliding roof to reach the comfort stop position or fully open (or fully close) when the OPEN switch (or CLOSE switch) is pressed for a minimum of 0.3 seconds.

Manual tilt up and down function

This function causes the sliding roof to tilt up (or tilt down) when the UP switch (or DOWN switch) is pressed for a maximum of 0.3 seconds. The sliding roof stops as soon as switch is released.

Auto tilt up and down function

This function causes the sliding roof to fully tilt up (or tilt down) when the UP switch (or DOWN switch) is pressed for a minimum of 0.3 seconds.

Jam protection function

The jam protection function automatically stops the sliding roof and moves it open halfway (or fully tilt up) if foreign matter gets jammed in the sliding roof during close or tilt down operation.

Key-off operation function

The key-off operation function makes it possible to operate the sliding roof for approximately 45 seconds after the engine switch is turned from on (IG) to off, if both the driver door and front passenger door are not opened.

Key-linked function*

HINT:

This function is linked with the power window 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 continuously for longer than 3 seconds, the sliding roof ECU (sliding roof drive gear sub-assembly) activates the sliding roof motor to open the sliding roof while the switch of the electrical key transmitter sub-assembly is being pressed.

HINT:

This function is linked with the power window wireless transmitter-linked function.

Sliding roof open warning function

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