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Inspection Procedure

WARNING: This page is about a different car, the 2005 Lexus RX 330. However, it is still accessible from the selected car via links, so may be relevant.
  1. INSPECT NAVIGATION ECU 
    1. Disconnect the navigation ECU connector N6.
    2. Measure the resistance according to the value(s) in the table below.

      Standard: 

      NAVIGATION ECU CONNECTOR TERMINALS RESISTANCE

      Tester connection Condition Specified condition
      SNSE - Body ground Always Below 1 Ω
      Fig 1: Disconnecting Navigation ECU Connector N6
      G03009401Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 
    2. OK: Go to next step. 
  2. CHECK HARNESS AND CONNECTOR (MULTI-DISPLAY - NAVIGATION ECU) 
    1. Disconnect the multi-display connector M4 navigation ECU connector N6.
    2. Measure the resistance according to the value(s) in the table below.

      Standard: 

      MULTI-DISPLAY CONNECTOR AND NAVIGATION ECU CONNECTOR TERMINALS RESISTANCE

      Tester connection Condition Specified condition
      MCO+ - MIC+ Always Below 1 Ω
      MCO- - MIC- Always Below 1 Ω
      MCO+ - Body ground Always 10 kΩ or higher
      MCO- - Body ground Always 10 kΩ or higher
      Fig 2: Disconnecting Multi-Display Connector M4
      G03009402Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Fig 3: Disconnecting Navigation ECU Connector N6
      G03009403Courtesy 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  
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