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Home >> Lexus >> 2009 >> LS 460 AWD >> Repair and Diagnosis >> Body & Frame >> Sun Roof/T-Top/Convertible Top >> Sliding Roof >> Sliding Roof System >> Sliding Roof ECU Power Source Circuit >> Inspection Procedure

Inspection Procedure

  1. INSPECT FUSE (S/ROOF, D-IG1-3) 
    1. Remove the S/ROOF and D-IG1-3 fuses from the main body ECU (driver side junction block).
    2. Measure the resistance of the fuses.

      Standard resistance 

      STANDARD RESISTANCE REFERENCE

      Tester Connection Condition Specified Condition
      S/ROOF fuse Always Below 1 Ω
      D-IG1-3 fuse Always Below 1 Ω

      NG: REPLACE FUSE 

      OK: Go to Next Step 

  2. CHECK HARNESS AND CONNECTOR (SLIDING ROOF DRIVE GEAR - BODY GROUND) 
    1. Disconnect the X5 drive gear connector.
    2. Measure the resistance and voltage according to the value(s) in the table below.

      Standard resistance 

      STANDARD RESISTANCE REFERENCE

      Tester Connection Condition Specified Condition
      X5-2 (E) - Body ground Always Below 1 Ω

      Standard voltage 

      VOLTAGE SPECIFICATION

      Tester Connection Switch Condition Specified Condition
      X5-1 (B) - Body ground Always 11 to 14 V
      X5-5 (IG) - Body ground Engine switch off Below 1 V
      X5-5 (IG) - Body ground Engine switch on (IG) 11 to 14 V
      Fig 1: Identifying X5 Drive Gear Connector Terminal
      G06198255Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

      OK: REPLACE SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY (SLIDING ROOF ECU) (See  DISASSEMBLY   ) 

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