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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. CHECK HARNESS AND CONNECTOR (NAVIGATION ECU - MULTI-DISPLAY CONTROLLER SUB-ASSY) 
    1. Disconnect the navigation ECU connector N2 and multi-display controller sub-assy connector R25.
    2. Measure the resistance according to the value(s) in the table below.

      Standard: 

      NAVIGATION ECU CONNECTOR AND MULTI-DISPLAY CONTROLLER SUB-ASSY CONNECTOR TERMINALS RESISTANCE

      Tester connection Condition Specified condition
      TX+ - TX+ Always Below 1 Ω
      TX- - TX- Always Below 1 Ω
      TX+ - Body ground Always 10 kΩ or higher
      TX- - Body ground Always 10 kΩ or higher
      Fig 1: Disconnecting Navigation ECU Connector N2
      G03009473Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Fig 2: Disconnecting Multi-Display Controller Sub-Assy Connector R25
      G03009474Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 
    2. OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN  DIAGNOSTIC TROUBLE CODE CHART  
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