270 SAFETY SELECTABLE TIRE FILL ALERT (STFA) — IF EQUIPPED 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. Operation: 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.
The horn will chirp once when the selected pres sure is reached to let the user know when to stop inflating or deflating the tire. NOTE: The STFA system will only support inflating or deflating one tire at a time. The horn will chirp three times if the tire is over inflated or over deflated and will continue to chirp every five seconds if the user continues to inflate or deflate the tire. 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. The horn will chirp once again when enough air is added or removed to reach proper selected pressure level.
Tire Pressure Information System (TPIS) 3500/4500/5500 Series Trucks 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. In order to use STFA, the Tire Fill Alert feature must be enabled through the radio Ъ page189. 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). Your vehicle may be equipped with a Tire Pressure Information System (TPIS). The Tire Pressure Information System (TPIS) uses wireless technology with wheel rim mounted electronic sensors to transmit tire pressure levels. Sensors mounted to each wheel as part of the valve stem transmit tire pressure readings to the receiver module. The hazard lamps will come on to confirm the vehicle is in Tire Fill Alert mode. NOTE: 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 Ъ page189. 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. If the hazard lamps do not come on while inflating or deflating the tire, the TPMS sensor may be in a null spot preventing the TPMS sensor signal from being received. In this case, the vehicle may need to be moved either forward or backward slightly to exit the null spot. NOTE:
It is particularly important for you to check the tire pressure in all of the tires on your vehicle monthly and to maintain the proper pressure. When Tire Fill Alert mode is entered, the tire pressure display screen will be displayed in the instrument cluster.