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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 VEHICLE 
    1. Check the vehicle type.

      Result 

      RESULT REFERENCE

      Vehicle type Proceed to
      w/o VSC A
      w/ VSC B

    B:  Go to step  4

    A: Go to next step 

  2. CHECK CAN BUS WIRE (SKID CONTROL ECU MAIN BUS LINE DISCONNECTION) 
    1. Turn the ignition switch off.
    2. Disconnect the skid control ECU connector (A40).
    3. Measure the resistance according to the value(s) in the table below.

      Resistance 

      RESISTANCE SPECIFICATION

      Tester Connection Condition Specified value
      A40-26 (CANH) - A40-15 (CANL) Ignition switch off 108 to 132 Ω

    NG: REPAIR OR REPLACE WIRE HARNESS OR CONNECTOR (CAN-H, CAN-L) 

    Fig 1: Identifying Skid Control ECU Connector Terminals
    G05007145Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: Go to next step 

  3. CHECK WIRE HARNESS (IG1, GND1) 
    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 value
      A40-4 (GND1) - Body ground Always Below 1 Ω
      A40-18 (IG1) - Body ground Ignition switch on (IG) 10 to 14 V

    NG: REPAIR OR REPLACE WIRE HARNESS OR CONNECTOR 

    Fig 2: Identifying Skid Control ECU Connector Terminals
    G05007146Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK : REPLACE SKID CONTROL ECU WITH ACTUATOR 

  4. CHECK CAN BUS WIRE (SKID CONTROL ECU MAIN BUS LINE DISCONNECTION) 
    1. Turn the ignition switch off.
    2. Disconnect the skid control ECU connector (A34).
    3. Measure the resistance according to the value(s) in the table below.

      Resistance 

      RESISTANCE SPECIFICATION

      Tester Connection Condition Specified value
      A34-11 (CANH) - A34-25 (CANL) Ignition switch off 108 to 132 Ω

    NG: REPAIR OR REPLACE WIRE HARNESS OR CONNECTOR (CAN-H, CAN-L) 

    Fig 3: Identifying Skid Control ECU Connector Terminals
    G05007147Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: Go to next step 

  5. CHECK WIRE HARNESS (IG1, GND1, GND2) 
    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 value
      A34-1 (GND2) - Body ground Always Below 1 Ω
      A34-32 (GND1) - Body ground Always Below Ω
      A34-46 (IG1) - Body ground Ignition switch on (IG) 10 to 14 V

    NG: REPAIR OR REPLACE WIRE HARNESS OR CONNECTOR 

    Fig 4: Identifying Skid Control ECU Connector Terminals
    G05007148Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK : REPLACE SKID CONTROL ECU WITH ACTUATOR 

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