Basic Diagnostic Procedure: Procedure

CAUTION: Remove foreign matter (dust, water, oil etc.) from the VDC Control Module & H/U connector during removal and installation.

NOTE:

To check the harness for open or short circuits, shake problem spot or connector.
Refer to "Check List for Interview". Refer to VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)>CHECK LIST FOR INTERVIEW .

CHECK PRE-INSPECTION.
1. Ask the customer when and how the trouble occurred using the Check List for Interview. Refer to VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)>CHECK LIST FOR INTERVIEW .
2. Before performing diagnostics, check the component which might affect VDC or parking brake system problems. Refer to VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)>GENERAL DESCRIPTION>INSPECTION .
  Is the check result OK?
  
  Yes: Go to 2.
  
  No: Repair or replace each component.
CHECK INDICATION OF DTC.
1. Turn the ignition switch to OFF.
2. Connect the Subaru Select Monitor to data link connector.
3. Turn the ignition switch to ON and run the Subaru Select Monitor.
4. Read the DTC using the Subaru Select Monitor. Refer to VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)>READ DIAGNOSTIC TROUBLE CODE (DTC)>OPERATION .
  NOTE: If the communication function of the Subaru Select Monitor cannot be executed properly, check the communication circuit. Refer to VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)>SUBARU SELECT MONITOR>INSPECTION>COMMUNICATION FOR INITIALIZING IMPOSSIBLE .
  
  Is DTC displayed on Subaru Select Monitor?
  
  Yes: Record the DTC, time stamp and freeze frame data. Go to 4.
  NOTE:
  - For the time stamp. Refer to LAN information. Refer to LAN SYSTEM (DIAGNOSTICS)>GENERAL DESCRIPTION>CAUTION>TIME STAMP .
  - Depending on DTCs, time stamp may not be stored.
  No: Go to 3.
PERFORM GENERAL DIAGNOSTICS.
1. Perform the inspection by Referring to "General Diagnostic Table". Refer to VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)>GENERAL DIAGNOSTIC TABLE>INSPECTION .
2. Perform the Clear Memory Mode. Refer to VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)>CLEAR MEMORY MODE>OPERATION .
3. Perform the Inspection Mode. Refer to VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)>INSPECTION MODE>PROCEDURE .
4. Read the DTC. Refer to VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)>READ DIAGNOSTIC TROUBLE CODE (DTC)>OPERATION .
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?
  
  Does the electronic parking brake operation indicator light go off with the electronic parking brake disengaged?
  
  Yes: Finish the diagnosis.
  
  No: Check the combination meter circuit. Refer to VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)>WARNING LIGHT ILLUMINATION PATTERN>ABS WARNING LIGHT DOES NOT GO OFF . Refer to VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)>WARNING LIGHT ILLUMINATION PATTERN>VDC WARNING LIGHT AND VDC INDICATOR LIGHT DO NOT GO OFF . Refer to VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)>WARNING LIGHT ILLUMINATION PATTERN>ELECTRONIC PARKING BRAKE INDICATOR LIGHT DO NOT GO OFF . Refer to VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)>WARNING LIGHT ILLUMINATION PATTERN>VDC OFF INDICATOR LIGHT DOES NOT GO OFF .
PERFORM DIAGNOSIS.
1. Refer to "List of Diagnostic Trouble Code (DTC)".
  NOTE: For the DTC list. Refer to "List of Diagnostic Trouble Code (DTC)". Refer to VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)>LIST OF DIAGNOSTIC TROUBLE CODE (DTC)>LIST .
2. Correct the cause of trouble.
3. Perform the Clear Memory Mode. Refer to VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)>CLEAR MEMORY MODE>OPERATION .
4. Perform the Inspection Mode. Refer to VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)>INSPECTION MODE>PROCEDURE .
5. Read the DTC. Refer to VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)>READ DIAGNOSTIC TROUBLE CODE (DTC)>OPERATION .
  Is DTC displayed?
  
  Yes: Repeat step 4 until DTC is not shown.
  
  No: Finish the diagnosis.