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Home >> Fiat >> 2017 >> 124 Spider Classica, Automatic Trans >> Repair and Diagnosis >> Steering >> Steering Control Systems >> (Electronic Power Steering (EPS) Module - Electrical Diagnostics) >> DTC Troubleshooting >> U0401-00 Invalid Data Received From ECM/Pcm >> Diagnostic Test

Diagnostic Test

  1. CHECK FOR PRESENCE OF POWERTRAIN CONTROL MODULE (PCM) ERRORS 
    1. Check for presence of Powertrain Control Module (PCM) errors.

      Are errors present?

      Yes 

      • Check that the PCM diagnosis is solved, then go to step 2.

      No 

      • Go to step 2.
  2. CHECK THAT THE ELECTRIC POWER STEERING (EPS) MODULE IS WORKING PROPERLY 
    1. Connect the diagnosis equipment and carry out the Electric Power Steering (EPS) Module error deletion procedure.
    2. Check if the error is still present.

      Is the error still present?

      Yes 

      • Repeat the checks from Step 1.
      • Replace the Electric Power Steering (EPS) Module in accordance with the Service Information. Refer to GEAR, REMOVAL AND INSTALLATION .

      No 

      • End of diagnosis.