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Home >> Toyota >> 2003 >> Highlander Base, 2.4 D, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 545 (Navigation System - Diagnostics) >> Power Source Circuit (Gateway Ecu) >> Inspection Procedure

Inspection Procedure

WARNING: This page is about a different car, the 2004 Toyota Highlander. However, it is still accessible from the selected car via links, so may be relevant.
  1. INSPECT GATEWAY ECU (BATT, ACC, IG, GND, CG) 
    1. Disconnect the gateway ECU connector G5.
    2. Measure the resistance according to the value (s) in the table below.

      Standard: 

      SPECIFIED CONDITION

      Tester connection Condition Specified condition
      GND - Body ground Always Below 1 Ω
      CG - Body ground Always Below 1 Ω
    3. Measure the voltage according to the value (s) in the table below.

      Standard: 

      SPECIFIED CONDITION

      Tester connection Condition Specified condition
      BATT - GND or CG Always 10 to 14 V
      ACC - GND or CG Ignition SW ACC 10 to 14 V
      IG - GND or CG Ignition SW ON 10 to 14 V
      Fig 1: Identifying Gateway ECU Connector G5
      G02909456Courtesy 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 (See  DIAGNOSTIC TROUBLE CODE CHART  )