FixVault

DTC Detection Logic

DTC Trouble diagnosis name
(Trouble diagnosis content)
DTC detecting condition Possible cause
U1044 ENG COMM CIRCUIT
(Engine communication circuit)
A signal voltage pf LIN communication between ECM and active grille shutter is excessively low or excessively high.
  • Harness and connectors

    (Engine communication line is open or shorted.)

  • Active grille shutter