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Navigation Voice Circuit: Procedure

  1. CHECK HARNESS AND CONNECTOR (NAVIGATION RECEIVER - STEREO COMPONENT AMPLIFIER) 
    1. Disconnect the L41 navigation receiver assembly connector.
      Fig 1: Identifying L41 Navigation Receiver Assembly Connector
      GTY236387Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the L31 stereo component amplifier assembly connector.
      Fig 2: Identifying L31 Stereo Component Amplifier Assembly Connector
      GTY227901Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester connection Condition Specified condition
      L41-11 (IVO+) - L31-23 (INT+) Always Below 1 Ω
      L41-12 (IVO-) - L31-22 (INT-) Always Below 1 Ω
      L41-11 (IVO+) - Body ground Always 10 kΩ or higher
      L41-12 (IVO-) - Body ground Always 10 kΩ or higher
      L41-13 (SLD) - Body ground Always 10 kΩ or higher
      TEXT IN ILLUSTRATION

      *1 Front view of wire harness connector
      (to Navigation Receiver Assembly)
      *2 Front view of wire harness connector
      (to Stereo Component Amplifier Assembly)

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK → See step   2 

  2. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE 
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