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:

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

Courtesy of SUBARU OF AMERICA, INC.

READ DTC .
Read the DTC using 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.
CHECK VDC OFF SWITCH .
Connect the Subaru Select Monitor, and display the [Data Monitor] of VDCCM with the engine started. 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.
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.
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

(B310) No. 39 - Chassis ground:

Is the resistance less than 10 Ω?

Yes: Check the VDC OFF switch circuit.

No: Go to 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.
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 .