VDC Off Indicator Light Does Not Go Off

Detecting condition: 

• Defective combination meter
• Defective CAN communication
• VDC OFF switch is shorted.

Trouble symptom: 

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

Wiring diagram: 

• Models without EyeSight

  Vehicle dynamics control system Ref. to WIRING SYSTEM>Vehicle Dynamics Control System>WIRING DIAGRAM>WITHOUT EyeSight .

  Courtesy of SUBARU OF AMERICA, INC.

• Models with EyeSight

  Vehicle dynamics control system Ref. to WIRING SYSTEM>Vehicle Dynamics Control System>WIRING DIAGRAM>WITH EyeSight .

  Courtesy of SUBARU OF AMERICA, INC.

1. READ DTC  .

   Read the DTC. Ref. to VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)>Read Diagnostic Trouble Code (DTC) .

   Is DTC displayed?

   Yes: Perform the diagnosis according to DTC. Ref. to VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)>List of Diagnostic Trouble Code (DTC) .

   No: Go to  2.

2. CHECK VDC OFF SWITCH  .

   Connect the Subaru Select Monitor, and display the current data of VDCCM with the engine started.

   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 .

   Is the check result OK?

   Yes: Go to  4.

   No: Replace the VDC OFF switch.

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

      Connector & terminal 

      Models without EyeSight 

      (B310) No. 20 - Chassis ground:

      Models with EyeSight 

      (B310) No. 31 - Chassis ground:

   Is the resistance less than 10 Ω?

   Yes: Check the VDC OFF switch circuit.

   No: Go to  5.

5. CHECK LAN SYSTEM  .

   Perform the diagnosis for LAN system. Ref. to LAN SYSTEM (DIAGNOSTICS)>Basic Diagnostic Procedure .

   Is there any fault in LAN system?

   Yes: Perform the diagnosis according to DTC for LAN system. Ref. to LAN SYSTEM (DIAGNOSTICS)>List of Diagnostic Trouble Code (DTC) .

   No: Go to  6.

6. CHECK COMBINATION METER  .

   Check the combination meter. Ref. to INSTRUMENTATION/DRIVER INFO>Combination Meter System>OPERATION>SELF-DIAGNOSIS DISPLAY MODE .

   Is the check result OK?

   Yes: Replace the VDCCM&H/U. Ref. to VEHICLE DYNAMICS CONTROL (VDC)>VDC Control Module and Hydraulic Control Unit (VDCCM&H/U) .

   No: Replace the combination meter. Ref. to INSTRUMENTATION/DRIVER INFO>Combination Meter>REMOVAL .