VDC Traction Mode

Detecting condition

Defective combination meter
Defective CAN communication
Defective VDC OFF switch

Trouble symptom

Even when the VDC OFF switch is operated, the VDC traction mode indicator light does not illuminate, or the illumination color does not change. (The VDC mode does not change)

NOTE:

When the VDC OFF switch is pressed (2 seconds or less), the VDC traction mode indicator light illuminates in green and the VDC OFF indicator light illuminates in yellow. (Traction mode)
When the VDC OFF switch is held down (2 seconds or more), the VDC OFF indicator light illuminates in yellow. (VDC OFF mode)
When pressing the VDC OFF switch for 30 seconds or more, the VDC OFF indicator light goes off and cannot operate any more. When turning the ignition switch from OFF to ON, the OFF operation enabled status is restored.

Wiring diagram:

Models without EyeSight
Vehicle dynamics control system. Refer to WIRING SYSTEM>VEHICLE DYNAMICS CONTROL SYSTEM>WIRING DIAGRAM>WITHOUT EYESIGHT .

Courtesy of SUBARU OF AMERICA, INC.
Models with EyeSight
Vehicle dynamics control system. Refer to WIRING SYSTEM>VEHICLE DYNAMICS CONTROL SYSTEM>WIRING DIAGRAM>WITH EYESIGHT .

Courtesy of SUBARU OF AMERICA, INC.

READ DTC.
Read the DTC. Refer to VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)>READ DIAGNOSTIC TROUBLE CODE (DTC) .

Is DTC displayed?

Yes: Perform the diagnosis according to DTC. Refer to VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)>LIST OF DIAGNOSTIC TROUBLE CODE (DTC) .

No: Go to 2.
CHECK HARNESS.
1. Turn the ignition switch to OFF.
2. Disconnect the connector from the VDC Control Module & H/U and VDC OFF switch.
3. Measure the resistance of harness between the VDC Control Module & H/U and VDC OFF switch connectors.
  Connector & terminal
  
  Models without EyeSight
  
  (B310) No. 20 - (i234) No. 5:
  
  Models with EyeSight
  
  (B310) No. 31 - (i234) No. 5:
Is the resistance less than 1 Ω?

Yes: Go to 3.

No: Repair the harness between the VDC Control Module & H/U and VDC OFF switch connectors.
CHECK GROUND SHORT OF HARNESS.
Measure the resistance between VDC Control Module & 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 1 Ω or more?

Yes: Go to 4.

No: Repair the harness between the VDC Control Module & H/U and VDC OFF switch connectors.
CHECK HARNESS.
Measure the resistance of harness between VDC OFF switch connector and chassis ground.

Connector & terminal

(i234) No. 6 - Chassis ground:

Is the resistance less than 10 Ω?

Yes: Go to 5.

No: Repair the harness between the VDC OFF switch connector and chassis ground.
CHECK VDC OFF SWITCH.
Check the VDC OFF switch. Refer to VEHICLE DYNAMICS CONTROL (VDC)>VDC OFF SWITCH>INSPECTION .

Is the check result OK?

Yes: Go to 6.

No: Replace the VDC OFF switch. Refer to VEHICLE DYNAMICS CONTROL (VDC)>VDC OFF SWITCH .
CHECK LAN SYSTEM.
Perform the diagnosis for LAN system. Refer to LAN SYSTEM (DIAGNOSTICS)>BASIC DIAGNOSTIC PROCEDURE .

Is there any fault in LAN system?

Yes: Perform the diagnosis according to DTC for LAN system. Refer to LAN SYSTEM (DIAGNOSTICS)>LIST OF DIAGNOSTIC TROUBLE CODE (DTC) .

No: Go to 7.
CHECK COMBINATION METER.
Check the combination meter. Refer to INSTRUMENTATION/DRIVER INFO>COMBINATION METER SYSTEM>INSPECTION .

Is the check result OK?

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

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