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Home >> Fiat >> 2020 >> 500L Lounge >> Repair and Diagnosis >> External Pages >> Different car >> Section 103 ((Aw6R31 Automatic Transmission Control Module (TCM) - Electrical Diagnostics)) >> Diagnosis And Testing >> P0604-00 Internal Control Module Random Access MEMORYRAMERROR >> Diagnostic Test
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Diagnostic Test

WARNING: This page is about a different car, the 2020 Fiat 124 Spider. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK FOR THE PRESENCE OF ERROR IN THE TRANSMISSION CONTROL MODULE (TCM) 
    1. Go to Key-OFF condition, then ON (engine off or on).
    2. Connect the diagnosis equipment and check for errors.

      Are there errors?

      Yes 

      • Proceed as indicated by the diagnosis equipment, then go to Step  2.

      No 

      • Go to Step  2.
  2. CHECK CORRECT OPERATION OF TRANSMISSION CONTROL MODULE (TCM) 
    1. Perform the Transmission Control Module error deletion procedure.
    2. Start the engine.
    3. Heat engine and gearbox.
    4. Drive the vehicle in D position and ensure the gears from 1st to 6th easily engage.
    5. Check whether there is a fault.

      Is the error still present?

      Yes 

      No 

      • End of diagnosis.
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