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Inspection Procedure

WARNING: This page is about a different car, the 2005 Lexus LX 470. However, it is still accessible from the selected car via links, so may be relevant.
  1. Check for open or short circuit in harness and connector between navigation ECU and television camera ECU. 
    1. Disconnect the connector from navigation ECU and television camera ECU.
    2. Measure the resistance according to the value(s) in the table below.

      Standard: 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester connection Condition Specified condition
      R - R1 Always Below 1 Ω
      G - G1 Always Below 1 Ω
      B- B1 Always Below 1 Ω
      SYNC - SYN1 Always Below 1 Ω
      VR - VR1 Always Below 1 Ω
      VG - VG1 Always Below 1 Ω
      R - Body ground Always 10 kΩ or higher
      G - Body ground Always 10 kΩ or higher
      B - Body ground Always 10 kΩ or higher
      SYNC - Body ground Always 10 kΩ or higher
      VR - Body ground Always 10 kΩ or higher
    Fig 1: Locating Terminals B, R, VR, VG, G And SYNC From Navigation ECU
    G02988052Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 2: Locating Terminals B1, VR1, SYN1, VG1, R1 And G1 From Television Camera ECU
    G02988053Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: Repair or replace harness or connector. 
    2. OK: Go To Next Step. 
  2. Check for open or short circuit in harness and connector between television camera ECU and malti-display assembly. 
    1. Disconnect the connector from the television camera ECU and multi-display assy.
    2. Measure the resistance according to the value(s) in the table below.

      Standard: 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester connection Condition Specified condition
      R - R Always Below 1 Ω
      G - G Always Below 1 Ω
      B- B Always Below 1 Ω
      SYNC - SYN1 Always Below 1 Ω
      VR - VR Always Below 1 Ω
      VG - VG Always Below 1 Ω
      R - Body ground Always 10 kΩ or higher
      G - Body ground Always 10 kΩ or higher
      B - Body ground Always 10 kΩ or higher
      SYNC - Body ground Always 10 kΩ or higher
      VR - Body ground Always 10 kΩ or higher
    Fig 3: Locating Terminals B, G, R, VG, SYNC And VR From Television Camera ECU
    G02988054Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 4: Locating Terminals VG, VR, R, G, B, And SYNC From Multi-Display Assy
    G02988055Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: Repair or replace harness or connector. 
    2. OK: Proceed to next circuit inspection shown in problem symptoms table. (See  PROBLEM SYMPTOMS TABLE   )