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Home >> Lexus >> 2008 >> RX 400h AWD >> Repair and Diagnosis >> Accessories & Equipment >> Infotainment >> Navigation >> Navigation System >> Navigation Voice Circuit >> Inspection Procedure

Inspection Procedure

  1. CHECK HARNESS AND CONNECTOR (MULTI-DISPLAY - NAVIGATION ECU) 
    1. Disconnect the multi-display connector M4 and the navigation ECU connector N3.
    2. Measure the resistance according to the value (s) in the table below.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART

      Tester connection Condition Specified condition
      VOI- - IVI- Always Below 1 Ω
      VOI+ - IVI+ Always Below 1 Ω
      VOI- - Body ground Always 10 kΩ or higher
      VOI+ - Body ground Always 10 kΩ or higher
      3. Fig 1: Identifying M4 And N3 Connector Terminals
      G05270970Courtesy 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 M4 and stereo component amplifier connector S27 or S29.
    2. Measure the resistance according to the value (s) in the table below.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART

      Tester connection Condition Specified condition
      IVO+ - SS11+ ((1)) Always Below 1 Ω
      IVO+ - II1+ ((2)) Always Below 1 Ω
      IVO- - SS11- ((1)) Always Below 1 Ω
      IVO- - II1- ((2)) Always Below 1 Ω
      IVO+ - Body ground Always 10 kΩ or higher
      IVO- - Body ground Always 10 kΩ or higher
      (1) with Front Center Speaker
      (2) without Front Center Speaker
      3. Fig 2: Identifying M4, S27 And 29 Connector Terminals
      G05270971Courtesy 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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