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Home › Toyota › 2008 › RAV4 Base, 2.4 D, AWD › Repair and Diagnosis › Brakes › Traction Control › Brake Control › Vehicle Stability Control System › AUTO LSD Indicator Light does not Come ON › Inspection Procedure

Inspection Procedure

  1. CHECK CAN COMMUNICATION SYSTEM 
    1. Check if the CAN communication system DTC is output (see DIAGNOSIS SYSTEM ).

      Result 

      DTC RESULT DESCRIPTION

      Result Proceed to
      DTC is not output A
      DTC is output B

    B: REPAIR CAN COMMUNICATION SYSTEM 

    A: Go to next step. 

  2. READ VALUE OF TECHSTREAM (AUTO LSD SWITCH) 
    1. Check the Data List for proper functioning of the Auto LSD switch.

      ABS/VSC/TRAC: 

      MEASUREMENT ITEM/RANGE AND DIAGNOSTIC NOTE

      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Auto LSD Switch Auto LSD switch (AUTO LSD switch) / ON or OFF ON: Auto LSD switch is ON
      OFF: Auto LSD switch is OFF      		 -

      OK: ON (downhill assist control switch is ON) appears on the screen. 

    NG: Go to step  5

    OK: Go to next step. 

  3. PERFORM ACTIVE TEST BY TECHSTREAM (AUTO LSD INDICATOR LIGHT) 
    1. Select the Active Test, generate a control command, and then check that the AUTO LSD indicator light operates.

      ABS/VSC/TRAC: 

      CONTROL RANGE AND DIAGNOSTIC NOTE

      Tester Display Test Part Control Range Diagnostic Note
      Auto LSD Indicator Lamp AUTO LSD indicator light Indicator light ON / OFF Observe combination meter

      OK: The AUTO LSD indicator light turns ON and OFF. 

    NG: REPLACE ABS AND TRACTION ACTUATOR ASSEMBLY 

    OK: Go to next step. 

  4. INSPECT COMBINATION METER ASSEMBLY 
    1. Inspect the combination meter (see HOW TO PROCEED WITH TROUBLESHOOTING ).

    NG: REPLACE COMBINATION METER ASSEMBLY 

    OK: REPLACE ABS AND TRACTION ACTUATOR ASSEMBLY 

  5. INSPECT AUTO LSD SWITCH 
    1. Disconnect the auto LSD switch switch.
      2. Fig 1: Identifying Auto LSD Switch
      G05585063Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance of the switch.

      Standard resistance 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Switch Condition Specified Condition
      3 - 6 Not pushed 10 kΩ or higher
      3 - 6 Pushed Below 1 Ω

    NG: REPLACE AUTO LSD SWITCH 

    OK: Go to next step. 

  6. CHECK WIRE HARNESS (AUTO LSD SWITCH - SKID CONTROL ECU AND BODY GROUND) 
    1. Disconnect the A19 ECU connector.
      2. Fig 2: Identifying A19 ECU And E51 Switch Connectors Terminals
      G05585064Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the E51 switch connector.
    3. Measure the resistance of the wire harness side connectors.

      Standard resistance 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Specified Condition
      A19-43 (CSW) - E51-6 Below 1 Ω
      E51-3 - Body ground Below 1 Ω
      A19-43 (CSW) - Body ground 10 kΩ or higher

    NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

    OK: REPLACE ABS AND TRACTION ACTUATOR ASSEMBLY 

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