VDC Off Indicator Light Does Not Go Off

Detecting condition: 

• Defective combination meter
• Defective CAN communication
• Defective VDC OFF switch

Trouble symptom: 

VDC OFF indicator light does not go off when starting the engine.

Wiring diagram: 

Vehicle dynamics control system Ref. to WIRING SYSTEM>VEHICLE DYNAMICS CONTROL SYSTEM>WIRING DIAGRAM

Courtesy of SUBARU OF AMERICA, INC.

1. READ DTC  .

   Read the DTC of [Brake Control] using the Subaru Select Monitor. Ref. to BRAKE CONTROL (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) 

   Is DTC displayed?

   Yes  : Perform the diagnosis according to the DTC. Ref. to BRAKE CONTROL (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC)>LIST 

   No  : Go to  2.

2. CHECK VDC OFF SWITCH  .

   Using the Subaru Select Monitor, read data of [OFF SW Signal] in the [Data Monitor] of [Brake Control] while the engine is running. Ref. to BRAKE CONTROL (DIAGNOSTICS)>DATA MONITOR 

   Does [OFF SW Signal] change according to operation of VDC OFF switch?

   Yes  : Go to  5.

   No  : Go to  3.

3. CHECK VDC OFF SWITCH  .

   Remove and check VDC OFF switch. Ref. to VEHICLE DYNAMICS CONTROL (VDC)>VDC OFF SWITCH>INSPECTION

   Is the check result OK?

   Yes  : Go to  4.

   No  : Replace the VDC OFF switch. Ref. to VEHICLE DYNAMICS CONTROL (VDC)>VDC OFF SWITCH

4. CHECK VDC OFF SWITCH CIRCUIT  .
   1. Disconnect the connector from the VDC Control Module & H/U.
   2. Measure the resistance between VDC Control Module & H/U connector and chassis ground.

      Connector & terminal 

      (B66) No. 41 - Chassis ground:

   Is the resistance less than 10 Ω?

   Yes  : Check the VDC OFF switch circuit.

   No  : Go to  5.

5. CHECK LAN SYSTEM  .

   Check the LAN system. Ref. to LAN SYSTEM (DIAGNOSTICS)>BASIC DIAGNOSTIC PROCEDURE

   Is the check result OK?

   Yes  : Go to  6.

   No  : Perform the diagnosis for LAN system.

6. CHECK COMBINATION METER  .

   Check the combination meter. Ref. to COMBINATION METER (DIAGNOSTICS)>BASIC DIAGNOSTIC PROCEDURE

   Is the check result OK?

   Yes  : Replace the VDC Control Module & H/U. Ref. to VEHICLE DYNAMICS CONTROL (VDC)>VDC CONTROL MODULE AND HYDRAULIC CONTROL UNIT (VDC CONTROL MODULE & H/U)

   No  : Replace the combination meter. Ref. to INSTRUMENTATION/DRIVER INFO>COMBINATION METER>REMOVAL