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Home >> Subaru >> 2021 >> Crosstrek Limited >> Repair and Diagnosis >> Brakes >> Traction Control >> Electric Brake Booster System (Diagnostics) >> Basic Diagnostic Procedure >> Procedure

Basic Diagnostic Procedure: Procedure

  1. PERFORM CUSTOMER INTERVIEW  .

    Ask the customer when and how the trouble occurred using the interview check list. Ref. to ELECTRIC BRAKE BOOSTER (DIAGNOSTICS)>CHECK LIST FOR INTERVIEW .

    Did you interview the customer?

    Yes:  Go to  2.

    No:  Perform the interview, and Go to  2.

  2. BASIC INSPECTION  .

    Perform basic inspection. Ref. to ELECTRIC BRAKE BOOSTER (DIAGNOSTICS)>GENERAL DESCRIPTION>INSPECTION .

    Is the check result OK?

    Yes:  Go to  3.

    No:  Repair the faulty part found in basic inspection, and Go to  3.

  3. CHECK WARNING LIGHT  .

    Check the lighting condition of brake warning light in the combination meter.

    Does the brake warning light illuminate?

    Yes:  Go to  4.

    No:  Currently, it is normal.

  4. CHECK SUBARU SELECT MONITOR COMMUNICATION  .
    1. Turn the ignition switch to OFF.
    2. Connect the Subaru Select Monitor to data link connector. Ref. to COMMON (DIAG)>DATA LINK CONNECTOR .
    3. Turn the ignition switch to ON and run the Subaru Select Monitor.
    4. Select [Electric Brake Booster].
      NOTE: For detailed operation procedures, refer to "Help" of application.

      Is communication possible?

      Yes:  Go to  5.

      No:  Check the communication circuit. Ref. to ELECTRIC BRAKE BOOSTER (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE FOR SUBARU SELECT MONITOR COMMUNICATION .

  5. CHECK DTC  .

    Read the DTC of [Electric Brake Booster] using the Subaru Select Monitor. Ref. to ELECTRIC BRAKE BOOSTER (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .

    Are DTC, time stamp and freeze frame data displayed?

    Yes:  Record the DTC, time stamp and freeze frame data. Go to  6.

    No:  Currently, it is normal.

  6. PERFORM DIAGNOSIS  .
    1. Perform the diagnosis for the displayed DTCs. Ref. to ELECTRIC BRAKE BOOSTER (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC)>LIST .
    2. Repair or replace the faulty parts.
    3. Using the Subaru Select Monitor, perform the clear memory of [Electric Brake Booster]. Ref. to COMMON (DIAG)>CLEAR MEMORY .
    4. Read the DTC of [Electric Brake Booster] using the Subaru Select Monitor. Ref. to ELECTRIC BRAKE BOOSTER (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .

      Are any DTCs displayed?

      Yes:  Repeat step  6 until DTC is not shown.

      No:  Finish the diagnosis.

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