RAM 1500 2020 Owner's Manual page 165

After driving the vehicle for up to 20 minutes

above 15 mph (24 km/h), the Tire Pressure
Monitoring System (TPMS) Warning Light will
flash on and off for 75 seconds and then
remain on solid. In addition, the instrument
cluster will display a "SERVICE TPM SYSTEM"
message for a minimum of five seconds and
then display dashes (--) in place of the pres-
sure value.
For each subsequent ignition switch cycle, a

chime will sound, the Tire Pressure Moni-
toring System (TPMS) Warning Light will flash
on and off for 75 seconds and then remain
on solid, and the instrument cluster will
display a "SERVICE TPM SYSTEM" message
for a minimum of five seconds and then
display dashes (--) in place of the pressure
value.
Once you repair or replace the original road

tire and reinstall it on the vehicle in place of
the non matching full size spare or compact
spare, the TPMS will update automatically. In
addition, the Tire Pressure Monitoring
System (TPMS) Warning Light will turn off and
the graphic in the instrument cluster will
display a new pressure value instead of
dashes (--), as long as no tire pressure is
below the low-pressure warning limit in any of
the four active road tires. The vehicle may
need to be driven for up to 20 minutes above
15 mph (24 km/h) in order for the TPMS to
receive this information.
Tire Fill Alert
This feature notifies the user when the placard
tire pressure is attained while inflating or
deflating the tire.
The customer may choose to disable or enable
the Tire Fill Alert feature through use of the
customer settings in the radio.
NOTE:
Only one tire can be filled at a time when

using the Tire Fill Alert system.
The Tire Fill Alert feature cannot be entered if

an existing TPM system fault is set to "active"
or if the system is in deactivation mode (if
equipped).
The system will be activated when a positive
increase in tire pressure is detected by the TPM
system while inflating the tire. The ignition must
be in the RUN mode, with the transmission in
PARK (P).
NOTE:
It is not required to have the engine running to
enter Tire Fill Alert mode.
The hazard lamps will come on to confirm the
vehicle is in Tire Fill Alert mode.
When Tire Fill Alert Mode is entered, the tire
pressure display screen will be displayed in the
instrument cluster.
If the hazard lamps do not come on while
inflating the tire, the TPM sensor may be in a
null spot preventing the TPM 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.
Operation:
The horn will chirp to let the user know when

to stop filling the tire, when it reaches recom-
mended 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.
SAFETY 163
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