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Home >> Subaru >> 2020 >> BRZ Limited, Automatic Trans >> Repair and Diagnosis >> Steering >> Steering Control Systems >> Power Steering System (Diagnostics) >> Power Steering System >> DTC C1541: Vehicle Speed Signal Failure 1 >> Inspection steps

Inspection steps

CAUTION: Always perform a steering zero point calibration after replacing the power steering computer ASSY. (Refer to WORK SUPPORT )
  1. Diagnosis codes check (CAN communication system)
    1. Use the SSM4 to check whether diagnosis code U0416 (VDC data error) is not being output. (Refer to CHECKING/CLEARING DIAGNOSTIC CODES )

      Criteria: U0416 is not output.

      OK: Go to next step

      NG: Progress to the appropriate diagnosis code (Refer to DTC U0100 ENGINE DATA NOT RECEIVED; DTC U0122 LOST COMMUNICATION WITH VEHICLE DYNAMICS CONTROL MODULE; DTC U0416 INVALID DATA RECEIVED FROM VEHICLE DYNAMICS CONTROL MODULE 

  2. Diagnosis codes check (Vehicle stability control system)
    1. Using the SSM4, check the Vehicle stability control system diagnosis codes. (Refer to CHECKING/CLEARING DIAGNOSTIC CODES )

      Criteria: No diagnosis code is output.

      OK: Go to next step

      NG: Go to "Vehicle stability control system (list of diagnostic codes)". (Refer to LIST OF DIAGNOSTIC CODES )

      Replacement of the power steering computer ASSY (Refer to POWER STEERING COMPUTER )