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. (The EPS warning light does not illuminate.)
• EyeSight steering support function does not operate. (The EPS warning light does not illuminate.)

1. CHECK DTC  .
   1. Turn the ignition switch to ON.
   2. Read the DTC of [Brake Control] using the Subaru Select Monitor. Ref. to BRAKE CONTROL (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .

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

   Yes:  Perform the diagnosis according to the DTC. Ref. to BRAKE CONTROL (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC)>LIST .

   No:  Go to  2.

2. CHECK LAN SYSTEM  .

   Check the LAN system. Ref. to LAN SYSTEM (DIAGNOSTICS)>BASIC DIAGNOSTIC PROCEDURE .

   Is the check result OK?

   Yes:  Go to  3.

   No:  Perform the diagnosis for LAN system.

3. CHECK VEHICLE SPEED SIGNAL  .
   1. Using the Subaru Select Monitor, read data of [Vehicle Speed] in the [Data Monitor] of [Power Steering]. Ref. to POWER STEERING (DIAGNOSTICS)>DATA 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. Clear the memory. Ref. to COMMON (DIAGNOSTICS)>CLEAR MEMORY .

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