501-02 Front End Body Panels	2014 Fiesta
Description and Operation	Procedure revision date: 08/6/2012

Active Grille Shutter - Overview

Overview

The active grille shutter system (when equipped) is comprised of the grille shutter assembly and the grille shutter actuator. The active grille shutter system is primarily used to maximize fuel economy by reducing aerodynamic drag on the vehicle. The active grille shutter system is also used to shorten engine warm-up time, increasing engine efficiency and providing heat to the vehicle occupants in a timely manner. The grille shutter actuator receives position commands from the PCM . The active grille shutter system carries out a calibration sequence whenever the engine is started, fully opening and closing the shutters before being positioned in the programmed position as requested by the PCM .

PCM inputs/outputs used for controlling of grille shutters are the:

ECT sensor
IAT sensor
A/C pressure transducer
APP sensor
ABS module (through the High Speed Controller Area Network (HS-CAN)
Engine cooling fan motor
Engine oil temperature