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Home >> Toyota >> 2003 >> Land Cruiser >> Repair and Diagnosis >> External Pages >> Different car >> Section 518 (Navigation System - Diagnostics) >> Circuit Inspection >> Power Source Circuit (Multi-Display Assembly) >> Inspection Procedure
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Inspection Procedure

WARNING: This page is about a different car, the 2005 Toyota Land Cruiser. However, it is still accessible from the selected car via links, so may be relevant.
  1. Check voltage between terminals B1, ACC, IG and GND of multi-display assembly. 
    1. Disconnect the connector from the multi-display assembly.
    2. Measure the voltage according to the value(s) in VOLTAGE CONDITION  .

      Standard: 

      VOLTAGE CONDITION

      Tester connection Condition Specified condition
      B1 - GND1 Always 10 to 14V
      ACC - GND1 Ignition SW ACC 10 to 14V
      IG - GND1 Ignition SW ON 10 to 14V
      Fig 1: Disconnecting Connector From Multi-Display Assembly
      G03071053Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. OK: Proceed to next circuit inspection shown in  PROBLEM SYMPTOMS TABLE   . 
    2. NG: Go to next step. 
  2. Check continuity between terminal GND1 of multi-display assembly and body ground. 
    1. Disconnect the connector from the multi-display assembly.
    2. Measure the resistance according to the value(s) in RESISTANCE CONDITION  .

      Standard: 

      RESISTANCE CONDITION

      Tester connection Condition Specified condition
      GND1 - Body ground Always Below 1 Ω
      Fig 2: Disconnecting Connector From Multi-Display Assembly
      G03071054Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. OK: Repair or replace harness or connector between navigation ECU and fuse. 
    2. NG: Repair or replace harness or connector between navigation ECU and body ground. 
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