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Gateway ECU Power Source Circuit: Wiring Diagram

WARNING: This page is about a different car, the 2006 Lexus RX 400h. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Gateway ECU Power Source Circuit Wiring Diagram
G04115511Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  1. INSPECT NETWORK GATEWAY ECU 
    1. Disconnect the network gateway ECU connector G3.
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      RESISTANCE SPECIFIED CONDITION

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

      Standard voltage 

      VOLTAGE SPECIFIED CONDITION

      Tester connection Condition Specified condition
      BATT - GND Always 10 to 14 V
      ACC - GND Ignition SW ACC 10 to 14 V
      IG - GND Ignition SW ON 10 to 14 V
      Fig 2: Identifying Network Gateway ECU Connector G3
      G04115512Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: RETURN TO THE ORIGINAL INSPECTION FLOW BECAUSE THE CHECK RESULT IS NORMAL 

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