Basic Diagnostic Procedure: Procedure

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

CHECK PRE-INSPECTION .
1. Ask the customer when and how the trouble occurred using the Check List for Interview. Ref. to BRAKE CONTROL (DIAGNOSTICS)>CHECK LIST FOR INTERVIEW .
2. Before performing diagnostics, check the component which might affect VDC or parking brake system problems. Ref. to BRAKE CONTROL (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 ON.
2. Read the DTC of [Brake Control] using the Subaru Select Monitor. Ref. 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. Ref. to BRAKE CONTROL (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE FOR SUBARU SELECT MONITOR COMMUNICATION .
Are any DTCs displayed?

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

No: Go to 3.
PERFORM GENERAL DIAGNOSTICS .
1. Perform the inspection by referring to "General Diagnostic Table". Ref. to BRAKE CONTROL (DIAGNOSTICS)>GENERAL DIAGNOSTIC TABLE>INSPECTION .
2. Using the Subaru Select Monitor, perform the clear memory of [Brake Control]. Ref. to COMMON (DIAGNOSTICS)>CLEAR MEMORY .
3. Execute the inspection mode. Ref. to BRAKE CONTROL (DIAGNOSTICS)>INSPECTION MODE .
4. Read the DTC of [Brake Control] using the Subaru Select Monitor. Ref. 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?

Do the brake warning light (EBD warning light)/electronic parking brake warning light and 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. Ref. to BRAKE CONTROL (DIAGNOSTICS)>WARNING LIGHT ILLUMINATION PATTERN>ABS WARNING LIGHT DOES NOT GO OFF . Ref. to BRAKE CONTROL (DIAGNOSTICS)>WARNING LIGHT ILLUMINATION PATTERN>VDC WARNING LIGHT AND VDC INDICATOR LIGHT DO NOT GO OFF . Ref. to BRAKE CONTROL (DIAGNOSTICS)>WARNING LIGHT ILLUMINATION PATTERN>VDC OFF INDICATOR LIGHT DOES NOT GO OFF . Ref. to BRAKE CONTROL (DIAGNOSTICS)>WARNING LIGHT ILLUMINATION PATTERN>BRAKE WARNING LIGHT (EBD WARNING LIGHT)/ELECTRONIC PARKING BRAKE WARNING LIGHT DOES NOT GO OFF . Ref. to BRAKE CONTROL (DIAGNOSTICS)>WARNING LIGHT ILLUMINATION PATTERN>ELECTRONIC PARKING BRAKE INDICATOR LIGHT DO NOT GO OFF .
PERFORM DIAGNOSIS .
1. Refer to "Diagnostic Trouble Code (DTC)".
  NOTE: For the DTC list, refer to "Diagnostic Trouble Code (DTC)". Ref. to BRAKE CONTROL (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC)>LIST .
2. Repair or replace the cause of trouble.
3. Using the Subaru Select Monitor, perform the clear memory of [Brake Control]. Ref. to COMMON (DIAGNOSTICS)>CLEAR MEMORY .
4. Execute the inspection mode. Ref. to BRAKE CONTROL (DIAGNOSTICS)>INSPECTION MODE .
5. Read the DTC of [Brake Control] using the Subaru Select Monitor. Ref. to BRAKE CONTROL (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .
Are any DTCs displayed?

Yes: Repeat step 4 until DTC is not shown.

No: Finish the diagnosis.

NOTE:

To check harness for open or short circuits, shake the suspected trouble spot or connector.
Refer to "Check List for Interview". Ref. to BRAKE CONTROL (DIAGNOSTICS)>CHECK LIST FOR INTERVIEW .