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Inspection Procedure

WARNING: This page is about a different car, the 2007 Toyota RAV4. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK CAN COMMUNICATION SYSTEM 
    1. Check if the CAN communication system DTC is output (see DIAGNOSIS SYSTEM ).

      Result 

      RESULT PROCEED

      Result Proceed to
      DTC not output A
      DTC output B

    B: REPAIR CAN COMMUNICATION SYSTEM 

    A: GO TO NEXT STEP. 

  2. CHECK SKID CONTROL ECU CONNECTOR 
    1. Check if the skid control ECU connector is securely connected.

      OK: The connector is securely connected. 

    NG: CONNECT CONNECTOR CORRECTLY 

    OK: GO TO NEXT STEP. 

  3. CHECK WIRE HARNESS (SKID CONTROL ECU - BODY GROUND) 
    1. Disconnect the A19 ECU connector. (See Fig 1).
    2. Measure the resistance of the wire harness side connector.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester Connection Switch Condition Specified Condition
      A19-28 (HDCS) - Body ground Downhill assist control switch is pushed Below 1 Ω
      A19-28 (HDCS) - Body ground Downhill assist control switch is not pushed 10 kΩ or higher
      Fig 1: Identifying A19 ECU Harness Connector Terminals (HDCS)
      G04489438Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: Go to step   6 

    NG: GO TO NEXT STEP. 

  4. INSPECT DOWNHILL ASSIST CONTROL SWITCH 
    1. Remove the downhill assist control switch.
    2. Measure the resistance of the switch.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester Connection Switch Condition Specified Condition
      1 - 4 Switch is pushed Below 1 Ω
      1 - 4 Switch is not pushed 10 kΩ or higher
      Fig 2: Inspecting Downhill Assist Control Switch
      G04489439Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE DOWNHILL ASSIST CONTROL SWITCH 

    OK: GO TO NEXT STEP. 

  5. CHECK WIRE HARNESS (CONTROL SWITCH - SKID CONTROL ECU AND BODY GROUND) 
    1. Disconnect the A19 ECU connector.
    2. Disconnect the E31 switch connector.
      3. Fig 3: Identifying A19 ECU Harness Connector Terminals HDCS & E31 Switch Connector
      G04489440Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Measure the resistance of the wire harness side connectors.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester Connection Specified Condition
      A19-28 (HDCS) - E31-4 Below 1 Ω
      E31-1 - Body ground Below 1 Ω
      A19-28 (HDCS) - Body ground 10 kΩ or higher

    NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

    OK: GO TO NEXT STEP. 

  6. CHECK COMBINATION METER 
    1. Check the combination meter (see PROBLEM SYMPTOMS TABLE ).

    NG: REPLACE COMBINATION METER 

    OK: REPLACE ABS AND TRACTION ACTUATOR ASSEMBLY 

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