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Home >> Lexus >> 2008 >> IS 250 AWD >> Repair and Diagnosis >> Accessories & Equipment >> Infotainment >> Navigation >> Navigation System >> Navigation Voice Speaker Circuit >> Inspection Procedure

Inspection Procedure

  1. CHECK HARNESS AND CONNECTOR (MULTI-DISPLAY - NAVIGATION ECU) 
    1. Disconnect the multi-display connector p1 and the navigation ECU connector p2.
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      RESISTANCE REFERENCE

      Tester connection Condition Specified condition
      VOI- - SI- Always Below 1 Ω
      VOI+ - SI+ Always Below 1 Ω
      VOI- - Body ground Always 10 kΩ or higher
      VOI+ - Body ground Always 10 kΩ or higher
      3. Fig 1: Identifying Multi-display Connector p1 And Navigation ECU Connector p2
      G05832667Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  2. CHECK HARNESS AND CONNECTOR (MULTI-DISPLAY - STEREO COMPONENT AMPLIFIER) 
    1. Disconnect the multi-display connector J51 and stereo component amplifier connector P30.
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      RESISTANCE REFERENCE

      Tester connection Condition Specified condition
      IVO+ - II1 + Always Below 1 Ω
      IVO- - II1- Always Below 1 Ω
      IVO+ - Body ground Always 10 kΩ or higher
      IVO- - Body ground Always 10 kΩ or higher
      3. Fig 2: Identifying Multi-Display Connector J51 And Stereo Component Amplifier Connector P30
      G05832668Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN  PROBLEM SYMPTOMS TABLE  

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