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Home >> Lexus >> 2011 >> GS 350 AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 260 (Sliding Roof (Diagnostics)) >> Sliding Roof System >> System Description >> System Description

System Description

WARNING: This page is about a different car, the 2009 Lexus IS 350 and 2009 Lexus IS 250. However, it is still accessible from the selected car via links, so may be relevant.
  1. 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.

  2. FUNCTION OF MAIN COMPONENT 
    Component Outline
    Sliding roof drive gear sub-assembly
    (Sliding roof ECU)    		 Sliding roof drive gear sub-assembly (sliding roof ECU) controls sliding roof motor to rotate forward and backward, which tilts or slides sliding roof glass.
    Map light assembly
    (Sliding roof switch assembly)    		 Map light assembly (sliding roof switch assembly) outputs operation signals to sliding roof drive gear sub-assembly (sliding roof ECU).
  3. SYSTEM OPERATION 

    The sliding roof has the following features.

    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 open (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. Sliding roof stops as soon as switch is released.
    Auto 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 minimum of 0.3 seconds.
    Jam protection The jam protection function automatically stops the sliding roof and moves it open half way (or fully tilt up) if a foreign object gets jammed in the sliding roof during close or tilt down operation.
    Key-off operation The key-off operation function makes it possible to operate the sliding roof for approx. 43 seconds after the engine switch is turned on (ACC) or off, if the front doors are not opened.
    Key-linked open and close Function When the key is not in the vehicle, the driver's door is locked, and the key in the driver's door is turned and maintained in the lock direction for 2.5 seconds or more, the sliding roof drive gear sub-assembly (sliding roof ECU) activates the sliding roof motor to close the sliding roof while the key is turned. Similarly, when the driver's door is unlocked, turning and maintaining the driver's door key in the unlock direction for 2.5 seconds or more will cause the sliding roof to be opened.
    Transmitter-linked open function When the multiplex network master switch assembly receives an unlock signal from the transmitter continuously for longer than 3.4 seconds, the sliding roof drive gear sub-assembly (sliding roof ECU) controls the sliding roof motor in accordance with the signal to open the sliding roof.
    Sliding roof open warning 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. Then, the warning message appears on the multi-information display.
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