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Gateway ECU Power Source Circuit: Procedure

  1. INSPECT NETWORK GATEWAY ECU 
    1. Disconnect the network gateway ECU connector.
      Fig 1: Identifying Network Gateway ECU Connector Terminals
      GTY261961Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      J76-24 (GND) - Body ground Always Below 1 Ω
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      J76-10 (BATT) - J76-24 (GND) Always 11 to 14 V
      J76-2 (ACC) - J76-24 (GND) Engine switch on (ACC) 11 to 14 V
      J76-1 (IG) - J76-24 (GND) Engine switch on (IG) 11 to 14 V
      TEXT IN ILLUSTRATION

      *1 Front view of wire harness connector
      (to Network Gateway ECU)

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK → See step   2 

  2. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE 
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