DTC C2541: Vehicle Dynamics Control Module Vehicle Speed Sensor

DTC detecting condition: 

When VDCCM reception failure (related to vehicle speed sensor) is detected after the ignition switch is ON.

Trouble symptom: 

The steering wheel operation feels heavy.

1. CHECK DTC. 

   Read the DTC of VDC system using the Subaru Select Monitor.

   Is a DTC related to VDC system or vehicle speed signal system detected?

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

   No:  Go to  2.

2. CHECK LAN SYSTEM. 

   Perform the diagnosis for LAN system using the Subaru Select Monitor. Ref. to LAN SYSTEM (DIAGNOSTICS)>BASIC DIAGNOSTIC PROCEDURE .

   Is a DTC related to CAN communication detected?

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

   No:  Go to  3.

3. CHECK VEHICLE SPEED SIGNAL. 
   1. Display the current data «Vehicle Speed» of the power steering control module using the Subaru Select Monitor.
   2. Lift up the vehicle (so that the wheels turn freely), start the engine, and raise engine speed in gear.
      CAUTION: Be careful that no one is near the spinning tires and nothing gets caught in them.
   3. Check for whether the data changes according to vehicle speed.

      Is the data in sync with the vehicle speed?

      Yes:  It is possible that temporary poor communication occurs. Perform the Clear Memory Mode. Ref. to POWER ASSISTED SYSTEM (POWER STEERING) (DIAGNOSTICS)>CLEAR MEMORY MODE .

      No:  Replace the steering gearbox. Ref. to POWER ASSISTED SYSTEM (POWER STEERING)>ELECTRIC POWER STEERING GEARBOX .