RAM 2500 2020 Owner's Manual page 172

170 SAFETY
If the hazard lamps do not come on while inflating
the tire, the TPM sensor may be in a inoperative
position, preventing the TPM 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 to let the user know

when to stop filling the tire, when it reaches
recommended pressure.
The horn will chirp three times if the tire is

over filled and will continue to chirp every five
seconds if the user continues to inflate the
tire.
The horn will chirp once again when enough

air is let out to reach proper inflation level.
The horn will also chirp three times if the tire

is then under-inflated and will continue to
chirp every five seconds if the user continues
to deflate the tire.
Selectable Tire Fill Alert (STFA)
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 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.
NOTE:
The STFA system will only support inflating or
deflating one tire at a time.
The system will be activated when the TPM
receiver module detects a change in tire
pressure. The ignition must be in the RUN
mode, with the transmission in PARK (P).
The hazard lamps will come on to confirm the
vehicle is in Tire Fill Alert mode.
If the hazard lamps do not come on while
inflating or deflating the tire, the TPM sensor
may be in a inoperative position, preventing the
TPM 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.