System Description

WARNING: This page is about a different car, the 2006 Lexus GS 430 and 2006 Lexus GS 300. However, it is still accessible from the selected car via links, so may be relevant.

GENERAL
This system has the following functions: manual slide open and close; auto slide open and close; manual tilt up and down; jam protection; key off operation; key-linked open and close; and transmitter-linked open and close.

FUNCTION OF MAIN COMPONENT

Component	Outline
Sliding roof drive gear sub-assembly (Sliding roof ECU)	Sliding roof ECU controls sliding roof motor to rotate forward and backward, which tilts or slides sliding roof glass.
Overhead Junction Block	Output of operation signals from built-in sliding roof switch to sliding roof ECU are handled by overhead junction block.

SYSTEM OPERATION

The sliding roof has the following features.

SLIDING ROOF SYSTEM OPERATION

Function	Outline
Manual slide open and close	This function causes sliding roof to open (or close) when SLIDE OPEN switch (or SLIDE CLOSE switch) is pressed for a maximum of 0.3 seconds. Sliding roof stops as soon as switch is released.
Auto slide open and close	This function causes sliding roof to be fully opened (or closed) when SLIDE OPEN switch (or SLIDE CLOSE switch) is pressed for a minimum of 0.3 seconds.
Manual tilt up and down	This function causes sliding roof to tilt up (or tilt down) when TILT UP switch (or TILT DOWN switch) is pressed for a maximum of 0.3 seconds.
Auto tilt up and down	This function enables sliding roof to tilt up (or down) when TILT UP switch (or TILT DOWN switch) is pressed for a minimum of 0.3 seconds.
Jam protection	The jam protection function automatically stops sliding roof and makes it open halfway (or fully tilted up) if a foreign object gets jammed in sliding roof during auto close operation (or auto tilt down operation).
Key off operation	Key off operation function makes it possible to operate sliding roof for approximately 45 seconds after engine switch is turned off, if front doors are not opened.
Key-linked open and close	When key is not in vehicle, driver side door key is locked, and key inserted into driver side door key cylinder is turned and maintained in lock position for 2.5 seconds or more, sliding roof ECU activates sliding roof motor to close sliding roof while key is turned. Similarly, when driver side door is unlocked and key in driver side door is turned and maintained in unlock position for 2.5 seconds or more, sliding roof ECU activates sliding roof motor to open sliding roof.
Transmitter-linked open and close	When cowl side junction block RH ECU receives an unlock signal from key continuously for 3.4 seconds or more, sliding roof ECU activates sliding roof motor to open sliding roof. Similarly, when cowl side junction block RH ECU receives a lock signal from key continuously for 3.4 seconds or more, sliding roof ECU activates sliding roof motor to close sliding roof.