DTC C1422 VDC Interruption For Engine Convenience: Trouble symptom

VDC does not operate.

1. CHECK COOPERATION CONTROL FEASIBILITY OF ECM USING SUBARU SELECT MONITOR. 
   1. Start the engine, and run the engine at idle approximately 5 minutes.
   2. Connecting the Subaru Select Monitor, select Data monitor. Ref. to BRAKE CONTROL (DIAGNOSTICS)>Subaru Select Monitor>OPERATION>DATA MONITOR .
   3. Check [E/G Control Stop Flag] on the display screen.

   Is "1" displayed in [E/G Control Stop Flag]?

   • Yes  : Go to  4.
   • No  : Go to 2. 
2. CHECK WARNING LIGHT. 

   Check whether the [VDC Warning Lamp] illuminates after driving for 1 minute or more at a speed of 10 km/h (6 MPH) or more.

   Does the [VDC Warning Lamp] come on?

   • Yes  : Go to  3.
   • No  : VDC is normal. Clear the memory. Ref. to BRAKE CONTROL (DIAGNOSTICS)>Clear memory .
   NOTE: DTC may be recorded if cranking is performed during driving.
3. CHECK POOR CONTACT OF CONNECTORS. 

   Is there poor contact of ECM connector?

   • Yes  : Repair the connector.
   • No  : Go to 4. 
4. CHECK DTC CONCERNING ECM. 

   Read the DTC relating the ECM using the Subaru Select Monitor. Ref. to ENGINE (DIAGNOSTICS) (H4DOTC)>Read Diagnostic Trouble Code (DTC) . Ref. to ENGINE (DIAGNOSTICS) (H4DO)>Read Diagnostic Trouble Code (DTC) .

   Are any DTCs displayed?

   • Yes  : Perform the diagnosis according to DTC. Ref. to ENGINE (DIAGNOSTICS) (H4DOTC)>List of Diagnostic Trouble Code (DTC) . Ref. to ENGINE (DIAGNOSTICS) (H4DO)>List of Diagnostic Trouble Code (DTC) .
   • No  : Go to 5. 
5. CHECK VDCCM&H/U. 
   1. Connect all connectors.
   2. Clear the memory. Ref. to BRAKE CONTROL (DIAGNOSTICS)>Clear memory .
   3. Perform the Inspection Mode. Ref. to BRAKE CONTROL (DIAGNOSTICS)>Inspection Mode .
   4. Read the DTC. Ref. to BRAKE CONTROL (DIAGNOSTICS)>Read Diagnostic Trouble Code (DTC) .

   Is the same DTC displayed?

   • Yes  : Replace the VDCCM only. Ref. to VEHICLE DYNAMICS CONTROL (VDC)>VDC Control Module and Hydraulic Control Unit (VDCCM&H/U)>REPLACEMENT .
   • No  : Go to 6. 
6. CHECK DETECTION OF OTHER DTCS FOR VDC. 

   Ref. to BRAKE CONTROL (DIAGNOSTICS)>Read Diagnostic Trouble Code (DTC) .

   Is any other DTC displayed?

   • Yes  : Perform the diagnosis according to DTC. Ref. to BRAKE CONTROL (DIAGNOSTICS)>List of Diagnostic Trouble Code (DTC) .
   • No  : Currently, it is normal. There may have been a temporary poor contact in the harness and connector or a temporary noise interference.