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Sliding Roof Control Switch Circuit: Procedure

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. READ VALUE USING TECHSTREAM (SLIDING ROOF SWITCH OPERATION) 
    1. Connect the Techstream to the DLC3.
    2. Turn the engine switch on (IG).
    3. Read the Data List according to the display on the Techstream.

      Slide Roof

      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Open SW SLIDE OPEN switch signal / ON or OFF ON: SLIDE OPEN switch is pressed
      OFF: SLIDE OPEN switch is not pressed      		 -
      Close SW SLIDE CLOSE switch signal / ON or OFF ON: SLIDE CLOSE switch is pressed
      OFF: SLIDE CLOSE switch is not pressed      		 -
      Up SW TILT UP switch signal / ON or OFF ON: TILT UP switch is pressed
      OFF: TILT UP switch is not pressed      		 -
      Down SW TILT DOWN switch signal / ON or OFF ON: TILT DOWN switch is pressed
      OFF: TILT DOWN switch is not pressed      		 -

      OK 

      The Techstream display changes according to switch operation as shown in the table.

    NG → See step   2 

    OK → See step   4 

  2. INSPECT MAP LIGHT ASSEMBLY (SLIDING ROOF SWITCH ASSEMBLY) 
    1. Remove the map light assembly (sliding roof switch assembly).
      Fig 1: Identifying Map Light Assembly & Map Light Assembly Connector View (GRD, OPN, CLS, UP & DOWN)
      GTY131715Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance

      Tester Connection Switch Condition Specified Condition
      R5-8 (DOWN) - R5-39 (GND) TILT DOWN switch is pressed Below 1 Ω
      R5-8 (DOWN) - R5-39 (GND) TILT DOWN switch is not pressed 10 kΩ or higher
      R5-9 (UP) - R5-39 (GND) TILT UP switch is pressed Below 1 Ω
      R5-9 (UP) - R5-39 (GND) TILT UP switch is not pressed 10 kΩ or higher
      R5-10 (CLS) - R5-39 (GND) SLIDE CLOSE switch is pressed Below 1 Ω
      R5-10 (CLS) - R5-39 (GND) SLIDE CLOSE switch is not pressed 10 kΩ or higher
      R5-11 (OPN) - R5-39 (GND) SLIDE OPEN switch is pressed Below 1 Ω
      R5-11 (OPN) - R5-39 (GND) SLIDE OPEN switch is not pressed 10 kΩ or higher

    NG → REPLACE MAP LIGHT ASSEMBLY (SLIDING ROOF SWITCH ASSEMBLY) 

    OK: Go to next step 

  3. CHECK HARNESS AND CONNECTOR (SLIDING ROOF ECU - MAP LIGHT ASSEMBLY) 
    1. Disconnect the R6 sliding roof ECU and R5 map light connectors.
      Fig 2: Identifying Sliding Roof ECU Wire Harness View & Map Light Assembly Wire Harness View
      GTY124739Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance

      Tester Connection Condition Specified Condition
      R6-6 (IG) - R5-24 (IG3) Always Below 1 Ω
      R6-6 (IG) - Body ground Always 10 kΩ or higher
      R6-8 (CLS) - R5-10 (CLS) Always Below 1 Ω
      R6-8 (CLS) - Body ground Always 10 kΩ or higher
      R6-9 (OPN) - R5-11 (OPN) Always Below 1 Ω
      R6-9 (OPN) - Body ground Always 10 kΩ or higher
      R6-4 (DWN) - R5-8 (DOWN) Always Below 1 Ω
      R6-4 (DWN) - Body ground Always 10 kΩ or higher
      R6-3 (UP) - R5-9 (UP) Always Below 1 Ω
      R6-3 (UP) - Body ground Always 10 kΩ or higher
      R5-39 (GND) - Body ground Always Below 1 Ω
      R6-7 (E) - Body ground Always Below 1 Ω

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK → See step   4 

  4. REPLACE SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY (SLIDING ROOF ECU). Refer to  REMOVAL 
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