The Selectable Tire Fill Alert (STFA) system is an optional feature that is included as part of the normal Tire Fill Alert system. The system is designed to allow the customer to select a pressure to inflate or deflate the vehicle's front and rear axle tires to and to provide feedback to the customer while inflating or deflating the vehicle's tires.
In the Selectable Tire Fill Alert application, which is located in the apps menu of the Uconnect system, the customer will be able to select a pressure setting for both the front and rear axle tire pressures by scrolling through a pressure range from XX to 15 psi in 1 psi increments for each axle setting. XX = the vehicle’s cold placard pressure values for the front and rear axles as shown on the vehicle placard pressure label.
The Tire Fill Alert feature disables every time the ignition is placed in the OFF position. The feature must be re-enabled through the radio each time the ignition is placed back in the ON/RUN position UCONNECT SETTINGS.
The customer may also store the pressure values chosen for each axle in the radio as a preset pressure. The customer will be allowed to store up to two sets of preset values in the radio for the front and rear axle pressure values.
Once the customer selects the tire pressures for the front and rear axles that they want to inflate or deflate to, they can begin inflating or deflating one tire at a time.
The STFA system will only support inflating or deflating one tire at a time.
The customer may choose to disable or enable the STFA feature through use of the TFA settings in the radio. If STFA appears grayed out it must be turned on prior to selecting.
In order to use STFA, the Tire Fill Alert feature must be enabled through the radio UCONNECT SETTINGS.
The system will be activated when the TPMS receiver module detects a change in tire pressure. The ignition must be in the RUN mode, with the transmission in PARK (P).
The Hazard Warning Flashers will come on to confirm the vehicle is in Tire Fill Alert mode.
If the Hazard Warning Flashers do not come on while inflating or deflating the tire, the TPMS sensor may be in an inoperative position, preventing the TPMS sensor signal from being received. In this case, the vehicle may need to be moved slightly forward or backward.
When Tire Fill Alert mode is entered, the tire pressure display screen will be displayed in the instrument cluster.
Operation:
The horn will chirp once when the selected pressure is reached to let the user know when to stop inflating or deflating the tire.
The horn will chirp three times if the tire is overinflated or over deflated and will continue to chirp every five seconds if the user continues to inflate or deflate the tire.
The horn will chirp once again when enough air is added or removed to reach proper selected pressure level.