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Basic Diagnostic Procedure: Procedure

CAUTION: Remove foreign matter (dust, water, oil etc.) from the VDC Contol Module& H/U connector during removal and installation.
  1. CHECK PRE-INSPECTION. 
    1. Ask the customer when and how the trouble occurred using the interview check list. Refer to BRAKE CONTROL (DIAGNOSTICS)>CHECK LIST FOR INTERVIEW .
    2. Before performing diagnostics, check the component which might affect VDC or parking brake system problems. Refer to BRAKE CONTROL (DIAGNOSTICS)>GENERAL DESCRIPTION>INSPECTION .

    Is the check result OK?

    Yes:  Go to  2.

    No:  Repair or replace each component.

  2. CHECK INDICATION OF DTC. 
    1. Turn the ignition switch to ON.
    2. Read the DTC using Subaru Select Monitor. Refer to BRAKE CONTROL (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .
      NOTE: If the communication function of the Subaru Select Monitor cannot be executed properly, check the communication circuit. Refer to BRAKE CONTROL (DIAGNOSTICS)>Diagnostic Procedure for Subaru SELECT MONITOR COMMUNICATION>INSPECTION>COMMUNICATION FOR INITIALIZING IMPOSSIBLE .

    Are any DTCs displayed?

    Yes:  Record the DTC, time stamp and freeze frame data. Go to  4.

    No:  Go to  3.

  3. PERFORM GENERAL DIAGNOSTICS. 
    1. Perform the inspection by referring to "General Diagnostic Table". Refer to BRAKE CONTROL (DIAGNOSTICS)>GENERAL DIAGNOSTIC TABLE>INSPECTION .
    2. Using the Subaru Select Monitor, perform the clear memory. Refer to COMMON (DIAG)>CLEAR MEMORY .
    3. Execute the inspection mode. Refer to BRAKE CONTROL (DIAGNOSTICS)>INSPECTION MODE .
    4. Read the DTC using Subaru Select Monitor. Refer to BRAKE CONTROL (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .
    5. Check that the DTC is not displayed.

    Do the VDC warning light & VDC indicator light, VDC OFF indicator light and ABS warning light go off after starting the engine?

    Yes:  Finish the diagnosis.

    No:  Check the combination meter circuit. Refer to BRAKE CONTROL (DIAGNOSTICS)>WARNING LIGHT ILLUMINATION PATTERN>ABS WARNING LIGHT DOES NOT GO OFF . Refer to BRAKE CONTROL (DIAGNOSTICS)>WARNING LIGHT ILLUMINATION PATTERN>VDC WARNING LIGHT AND VDC INDICATOR LIGHT DO NOT GO OFF . Refer to BRAKE CONTROL (DIAGNOSTICS)>WARNING LIGHT ILLUMINATION PATTERN>VDC OFF INDICATOR LIGHT DOES NOT GO OFF .

  4. PERFORM DIAGNOSIS. 
    1. Refer to "Diagnostic Trouble Code (DTC)".
      NOTE: For the DTC list, refer to "Diagnostic Trouble Code (DTC)". Refer to BRAKE CONTROL (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC)>LIST .
    2. Correct the cause of trouble.
    3. Using the Subaru Select Monitor, perform the clear memory. Refer to COMMON (DIAG)>CLEAR MEMORY .
    4. Execute the inspection mode. Refer to BRAKE CONTROL (DIAGNOSTICS)>INSPECTION MODE .
    5. Check that the DTC is not displayed.

    Is DTC displayed?

    Yes:  Repeat step  4 until DTC is not shown.

    No:  Finish the diagnosis.

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