My 2018 has radiator shutters and my 2013 did not. Our truck always seemed to heat up quickly which I liked. I never noticed the shutters; but now that I did I notice they are always open even then the truck has sat over night and the temp in in the 40's. Any ideas.. I have not looked for a fuse yet but plan on today.

I have an Edge Monitor plugged to the diagnostic receiver so I see the temp. Thanks for any ideas

 

What state is Fountain Valley in ?

 

From the Interwebs....

Some new Ford vehicles feature active grille shutters — a new system that optimizes aerodynamics by using vents to control airflow through the grille to the cooling system and engine compartment. If air is required to cool the engine, the vents are opened. If no airflow is needed, the vents are shut, contributing to significantly reduced aerodynamic drag.

 

"...If no airflow is needed, the vents are shut, contributing to significantly reduced aerodynamic drag...."

So if yours are always open you're correct in looking for that fuse, it might as simple as that.

 

My money is on that when everything is powered off, the vents are open. They will close when in motion.

 

Mounted ahead of the radiator, the active grille shutters feature motorized horizontal vanes that can rotate 90º to block airflow. Automatically controlled by the car’s electronic control unit, the vanes can be rotated into 15 different positions — from fully closed to fully open — depending on the amount of cooling air required.

When fully closed, the reduction in drag means the active grille shutters can reduce CO2 emissions by 2%.

As an additional benefit, the system keeps the vanes closed as long as possible when starting from cold, so the engine reaches its most efficient operating temperature quicker. This also helps reduce fuel consumption.

 

Of course Ford would install an additional circuit to tell the ECM that it's moving so now close the shutters. Must be an engineer justifying his salary, lol.
It seems to me that it would have been simpler to default position them to closed and open them when the temps say they're needed then close again when power is removed or when temp says not needed. Who cares if the vehicle is moving or not.

 

 

My opinion is that it would be best to have them open when the engine is off. This would provide a "fail safe" condition such that if the vanes were not working, they would be open. If they failed in the closed position, you could be in a heap of trouble.

 

Not having seen them in person I didn't know they were that close to the radiator that they would prevent air flow if stuck closed. That in itself would be a design flaw.

 

When you turn the truck off, they (active grille shutters) open. Have someone shut it off for you and watch it happen.

 

This makes sense since them being open would help cool the radiator.

 

A little light reading...

Active Grille Shutter The active grille shutter actuator positions the active grille shutters based on commands from the PCM . The active grille shutter moves 90 degrees from fully closed to fully open and, based on the position commanded by the PCM , is set in 1 of 16 positions (approximately 6 degrees between positions).During normal operation, the active grille shutter may be partially to fully open when the engine is off depending on the ambient temperature. After an engine starting event, a self-calibration of the active grille shutter system occurs which typically takes 15-20 seconds. The active grille shutter system performs the calibration sequence by detecting the end positions, open and closed. The calibration sequence can begin in either direction, open or closed, and continues until it is successful or a fault is sensed. A long pause may occur between the 2 portions (open/close) of the calibration sequence. If certain faults are present (shutter blocked or actuator error), a re-calibration is initiated in an attempt to resolve the problem. If the problem is not resolved after a calibrated number of re-calibration attempts (usually 3 or 4), a timer starts and sets a DTC when the timer reaches a predetermined limit.NOTE: If equipped with 2.7L and 3.5L GTDI, the upper and lower active grille shutter actuators operate independently from each other and transmit/receive unique commands to/from the PCM . Each active grille shutter actuator reports unique Diagnostic Trouble Codes (DTCs). The PCM communicates the desired position (open, closed or in between) of the active grille shutter systems. The upper active grille shutter control is based on various PCM inputs (vehicle speed, coolant temperature, ambient temperature, A/C system pressure, etc.). If equipped, the lower active grille shutter control is dedicated to managing charge air temperature into the turbocharger, and is based on PCM inputs such as vehicle speed, turbo charge pressure, ambient temperature, charge air temperature, etc...The PCM communicates to the active grille shutter actuator(s) via a LIN . The LIN supports bi-directional communication between the active grille shutter actuator(s) and PCM , allowing the active grille shutter actuator(s) to communicate position and fault information to the PCM .The PCM sets active grille shutter Diagnostic Trouble Codes (DTCs) when the fault information is communicated by the active grille shutter actuator for a predetermined amount of time. Any failures of the LIN for over 10 seconds continuously results in the active grille shutter actuator positioning the active grille shutter fully open. There is no indication to the driver of the vehicle when a fault with the active grille shutter system is present or a active grille shutter DTC is set in the PCM .

 

I knew it, waaaay to complicated, LOL !!