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VEHICLE STABILITY CONTROL SYSTEM (for Vacuum Brake Booster) HOW TO PROCEED WITH TROUBLESHOOTING

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Tip:

  • The vehicle stability control system troubleshooting procedures are based on the premise that the CAN communication system is functioning normally. Check the CAN communication system first before troubleshooting the vehicle stability control system.

  • *: Use the intelligent tester.


  1. Click here

    VEHICLE BROUGHT TO WORKSHOP


    • NEXT
  2. Click here

    CUSTOMER PROBLEM ANALYSIS


    1. Interview the customer and confirm the trouble.

      Tip:

      Interview the customer to confirm the following:


      • History of brake fluid replacement.

      • Whether the engine was stopped intentionally when driving.

      • Whether the brake and accelerator pedals were depressed simultaneously.


      • NEXT
  3. Click here

    INSPECT BATTERY VOLTAGE

    Standard voltage
    11 to 14 V

    If the voltage is below 11 V, recharge or replace the battery before proceeding.


    • NEXT
  4. Click here

    CHECK DTC AND FREEZE FRAME DATA*


    1. Check and record output DTCs and the freeze frame data.

    2. Clear the DTCs and freeze frame data (Click herefor DTC Check/Clear, orClick herefor Freeze Frame Data).

    3. Reconfirm the DTCs.


      1. Reconfirm the DTCs based on the recorded output DTCs and freeze frame data (Click herefor DTC Check/Clear, orClick herefor Freeze Frame Data).

        Tip:

        If DTC U0073, U0100, U0114, U0123, U0124 or U0126 is output together with a CAN communication DTC, first check the appropriate sensor for a momentary open circuit (Click here).

        Table 1. Result
        Result Proceed to
        DTC output A
        DTC not output (Problem symptom does not occur) B
        DTC not output (Problem symptom occurs) C

      • B
      • GO TO STEP 6
      • C
      • GO TO STEP 7
      • A
  5. Click here

    DIAGNOSTIC TROUBLE CODE CHART


    1. Proceed to Diagnostic Trouble Code Chart (Click here).


      • NEXT
      • GO TO STEP 8
  6. Click here

    SYMPTOM SIMULATION


    1. Proceed to Check for Intermittent Problems (Click here).


      • NEXT
  7. Click here

    PROBLEM SYMPTOMS TABLE


    1. Proceed to Problem Symptoms Table (Click here).


      • NEXT
  8. Click here

    CIRCUIT INSPECTION*


    • NEXT
  9. Click here

    IDENTIFICATION OF PROBLEM


    • NEXT
  10. Click here

    REPAIR OR REPLACEMENT


    • NEXT
  11. Click here

    CONFIRMATION TEST*


    • NEXT
    • END