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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 >> Brake Warning Light Remains ON >> Inspection Procedure

Inspection Procedure

  1. PREPARE FOR INSPECTION 
    1. Check that both of the following conditions are satisfied.
      • The brake fluid level in the brake master cylinder reservoir is correct.
      • The parking brake is released.

      HINT:

      When the ABS warning light remains illuminated, repair the malfunctions in the ABS system first.

  2. CHECK DTC FOR ABS 
    1. Check if any ABS DTCs are output (see DTC CHECK / CLEAR  ).

      Result 

      DTC RESULT DESCRIPTION

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

    B: REPAIR CIRCUITS INDICATED BY OUTPUT DTCS 

    A: Go to next step. 

  3. 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. 

  4. INSPECT SKID CONTROL ECU CONNECTOR 
    1. Check if the skid control ECU connector is properly installed.

      OK: The skid control ECU connector is properly installed. 

    NG: CONNECT CONNECTOR TO ECU SECURELY 

    OK: Go to next step. 

  5. CHECK WIRE HARNESS (SKID CONTROL ECU - BATTERY AND BODY GROUND) 
    1. Disconnect the A19 ECU connector.
      2. Fig 1: Identifying A19 ECU Connector Terminals
      G05585046Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance of the wire harness side connector.

      Standard resistance 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Specified Condition
      A19-32 (GND1) - Body ground Below 1 Ω
      A19-1 (GND2) - Body ground Below 1 Ω
    3. Measure the voltage of the wire harness side connector.

      Standard voltage 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Condition Specified Condition
      A19-46 (IG1) - Body ground Ignition switch ON 10 to 14 V

    NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

    OK: Go to next step. 

  6. READ VALUE OF TECHSTREAM (PARKING BRAKE SWITCH) 
    1. Using the Data List, check for proper functioning of the parking brake switch.

      ABS / VSC / TRAC: 

      MEASUREMENT ITEM/RANGE AND DIAGNOSTIC NOTE

      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Parking Brake SW Parking brake switch / ON or OFF ON: Parking brake applied
      OFF: Parking brake released      		 -

      OK: When the parking brake lever is operated, the display changes as shown above. 

    NG: Go to step  10

    OK: Go to next step. 

  7. INSPECT BRAKE FLUID LEVEL WARNING SWITCH 
    1. Remove the reservoir tank cap and strainer.
    2. Disconnect the brake fluid level warning switch connector.
      Fig 2: Identifying Brake Fluid Level Warning Switch
      G05585050Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Measure the resistance of the switch.

      HINT:

      A float is placed inside the reservoir. Its position can be changed by increasing or decreasing the brake fluid level.

      Standard resistance 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Condition Specified Condition
      1 (+) - 2 (E) Float up (Switch OFF) 10 kΩ or higher
      1 (+) - 2 (E) Float down (Switch ON) Below 1 Ω

      HINT:

      If there is no problem after the above check is finished, adjust the brake fluid level to the MAX level.

    NG: REPLACE BRAKE MASTER CYLINDER RESERVOIR SUB-ASSEMBLY 

    OK: Go to next step. 

  8. CHECK WIRE HARNESS (LEVEL WARNING SWITCH - COMBINATION METER AND BODY GROUND) 
    1. Disconnect the E19 combination meter connector.
      2. Fig 3: Identifying E19 Combination Meter And A8 Switch Connector Terminals
      G05585051Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the A8 switch connector.
    3. Measure the resistance of the wire harness side connectors.

      Standard resistance 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Specified Condition
      E19-14 (SW) - A8-1 (+) Below 1 Ω
      E19-14 (SW) - Body ground 10 kΩ or higher
      A8-2 (E) - Body ground Below 1 Ω

    NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

    OK: Go to next step. 

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

    NG: REPLACE COMBINATION METER 

    OK: REPLACE ABS AND TRACTION ACTUATOR ASSEMBLY 

  10. INSPECT PARKING BRAKE SWITCH ASSEMBLY 
    1. Remove the parking brake switch.
      Fig 4: Identifying Parking Brake Switch Assembly
      G05585052Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance of the switch.

      Standard resistance 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Condition Specified Condition
      1 - Body ground Parking brake switch ON (Switch pin not pushed) Below 1 Ω
      1 - Body ground Parking brake switch OFF (Switch pin pushed) 10 kΩ or higher

    NG: REPLACE PARKING BRAKE SWITCH ASSEMBLY 

    OK: Go to next step. 

  11. CHECK WIRE HARNESS (JUNCTION BLOCK - PARKING BRAKE SWITCH AND BODY GROUND) 
    1. Disconnect the ID junction block connector.
      2. Fig 5: Identifying ID Junction Block And E41 Switch Connector Terminals
      G05585053Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the E41 switch connector.
    3. Measure the resistance of the wire harness side connectors.

      Standard resistance 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Specified Condition
      ID-4 (PKB) - E41-1 Below 1 Ω
      ID-4 (PKB) - Body ground 10 kΩ or higher

    NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

    OK: REPLACE INSTRUMENT PANEL JUNCTION BLOCK 

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