RAM Commercial CHASSIS CAB 3500 2021 Owner's Manual page 292

290 SAFETY
Trailer Sensors Detected Do Not Match Active
Trailer
The "Trailer Sensors Detected Do Not Match
Active Trailer" message will be displayed in the
instrument cluster when the trailer sensors
being received by the TTPMS module do not
match the trailer sensors paired to the current
trailer number selected. This message will be
displayed when the sensors being received
completely match the sensors paired to another
trailer number configured in the TTPMS module.
To correct this condition, the correct trailer
number must be selected in the radio
Ú page 228.
Tire Fill Alert — If Equipped
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 TPMS fault is set to "active" or if the
system is in deactivation mode (if equipped).
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).
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.
If the hazard lamps do not come on while
inflating 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.
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

overfilled 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 underinflated and will continue to
chirp every five seconds if the user continues
to deflate the tire.