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

Sliding roof ECU (Sliding roof drive gear assembly)

The sliding roof ECU (sliding roof drive gear assembly) controls the rotational direction of the motor, which tilts or slides the sliding roof glass.

Roof sunshade ECU (Sliding roof drive gear assembly)

The roof sunshade ECU (sliding roof drive gear assembly) controls the rotational direction of the motor, which slides roof sunshade.

Map light assembly

The map light assembly outputs operation signals to the sliding roof ECU (sliding roof drive gear assembly) and roof sunshade ECU (sliding roof drive gear assembly).

Manual slide open and close function

Auto slide open and close function

Manual tilt up and down function

For sliding roof:

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

Auto tilt up function

For sliding roof:

When the sliding roof is not fully tilted up, this function causes the sliding roof to reach the fully tilted up position when the sliding roof switch is pressed for a minimum of 0.3 seconds.

Jam protection function

Key-off operation function

The key-off operation function makes it possible to operate the sliding roof and roof sunshade for approximately 45 seconds after the engine switch is turned from on (IG) to off, if the front doors 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 assembly) activates the sliding roof motor to open the sliding roof while the wireless transmitter switch 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, a warning message appears on the multi-information display.