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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 (DISTANCE CONTROL ECU SUB BUS LINE DISCONNECTION) 
    1. Turn the ignition switch off.
    2. Disconnect the distance control ECU connector (A20).
    3. Measure the resistance according to the value(s) in the table below.

      Resistance 

      RESISTANCE SPECIFICATION

      Tester Connection Condition Specified Condition
      A20-8 (CANH) - A20-9 (CANL) Ignition switch off 54 to 69 Ω

    NG: REPAIR OR REPLACE DISTANCE CONTROL ECU BRANCH WIRE OR CONNECTOR (CAN-H, CAN-L) 

    Fig 1: Disconnecting Distance Control ECU Connector (A20)
    G05007150Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: Go to next step 

  2. CHECK WIRE HARNESS (B, 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
      A20-12 (GND) - Body ground Always Below 1 Ω
      A20-1 (B) - Body ground Ignition switch on (IG) 10 to 14 V

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Fig 2: Disconnecting Distance Control ECU Connector (A20)
    G05007151Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK : REPAIR OR REPLACE DISTANCE CONTROL ECU 

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