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Home >> Fiat >> 2021 >> 500X Trekking >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Heating & Air Conditioning - DTCS B1912-15 To U2031-87 >> DTC Troubleshooting >> P1946-00-Crash Event Detected - Engine Shutdown >> Diagnostic Test

Diagnostic Test

  1. CHECK FOR AN ACTIVE DTC 
    1. With the scan tool, read DTCs.

      Is the DTC active?

      Yes 

      • Go To  2

      No 

      • Test complete.
  2. CHECK IF AN IMPACT HAS EFFECTIVELY TAKEN PLACE 
    1. This error is stored after fuel pump deactivation due to the intervention of the Airbag Node in the event of an impact. Check if the impact has effectively taken place.

      Has an impact taken place?

      Yes 

      • Connect the scan tool to the Body Control Module, enter active diagnosis and carry out the procedure "Fire Protection System Activate".

      No 

      • Go To  3
  3. CHECK CONNECTIONS FOR POWERTRAIN CONTROL MODULE AND BODY CONTROL MODULE 
    1. Check for the presence of loose electrical connections at the Powertrain Control Module and the Body Control Module.

      Were any loose electrical connections present?

      Yes 

      • Go To  4

      No 

      • Restore the correct connections.
  4. CHECK THE CAN LINE WIRING CONTINUITY 
    1. Check the continuity of the wiring of the CAN Line between the Body Control Module and the Powertrain Control Module.

      Does the wiring have continuity?

      Yes 

      • End of diagnosis.

      No 

      • Restore the correct continuity for the wiring.