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