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Inspection Procedure

WARNING: This page is about a different car, the 2008 Toyota Avalon. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK CAN BUS WIRE (NETWORK GATEWAY ECU SUB BUS LINE DISCONNECTION) 
    1. Turn the ignition switch off.
    2. Disconnect the network gateway ECU connector (E23).
    3. Measure the resistance according to the value(s) in the table below.

      Resistance 

      RESISTANCE SPECIFICATION

      Tester Connection Condition Specified Condition
      E23-17 (CA1H) - E23-18 (CA1L) Ignition switch off 54 to 69 Ω

    NG: REPAIR OR REPLACE NETWORK GATEWAY ECU SUB BUS LINE OR CONNECTOR (CAN-H, CAN-L) 

    Fig 1: Disconnecting Network Gateway ECU Connector (E23)
    G05408866Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: Go to next step 

  2. CHECK WIRE HARNESS (BATT, ACC, IG, GND) 
    1. Measure the resistance and voltage according to the value(s) in the table below.

      Resistance and voltage 

      RESISTANCE AND VOLTAGE SPECIFICATION

      Tester Connection Condition Specified Condition
      E23-24 (GND) - Body ground Always Below 1 Ω
      E23-10 (BATT) - Body ground Always 10 to 14 V
      E23-2 (ACC) - Body ground Ignition switch on (ACC) 10 to 14 V
      E23-1 (IG) - Body ground Ignition switch on (IG) 10 to 14 V

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Fig 2: Disconnecting Network Gateway ECU Connector (E23)
    G05408867Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK : REPLACE NETWORK GATEWAY ECU 

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