RAM 2015 1500, Operating Information Manual, Page: 352 / 998

The TPMS will warn the driver of a low tire
pressure if the tire pressure falls below the
low-pressure warning limit for any reason, in-
cluding low temperature effects and natural
pressure loss through the tire.
The TPMS will continue to warn the driver of low
tire pressure as long as the condition exists,
and will not turn off until the tire pressure is at or
above the recommended cold placard pressure.
Once the low tire pressure warning (Tire Pres-
sure Monitoring [TPM] Telltale Light) illumi-
nates, you must increase the tire pressure to
the recommended cold placard pressure in or-
der for the “Tire Pressure Monitoring Telltale
Light” to turn off. The system will automatically
update and the “Tire Pressure Monitoring Tell-
tale Light” will turn off once the system receives
the updated tire pressures. The vehicle may
need to be driven for up to 20 minutes above
15 mph (25 km/h) in order for the TPMS to
receive this information.
For example, your vehicle may have a recom-
mended cold (parked for more than three hours)
placard pressure of 30 psi (207 kPa). If the
ambient temperature is 68°F (20°C) and the
measured tire pressure is 27 psi (186 kPa), a
temperature drop to 20°F (-7°C) will decrease
the tire pressure to approximately 23 psi
(158 kPa). This tire pressure is sufficiently low
enough to turn ON the “Tire Pressure Monitor-
ing Telltale Light.” Driving the vehicle may cause
the tire pressure to rise to approximately 27 psi
(186 kPa), but the “Tire Pressure Monitoring
Telltale Light” will still be ON. In this situation,
the “Tire Pressure Monitoring Telltale Light” will
turn OFF only after the tires are inflated to the
vehicle’s recommended cold placard pressure
value.
CAUTION!
•
The TPMS has been optimized for the
original equipment tires and wheels. TPMS
pressures have been established for the
tire size equipped on your vehicle. Unde-
sirable system operation or sensor dam-
age may result when using replacement
equipment that is not of the same size,
type, and/or style. Aftermarket wheels can
cause sensor damage. Using aftermarket
(Continued)
CAUTION! (Continued)
tire sealants may cause the Tire Pressure
Monitoring System (TPMS) sensor to be-
come inoperable. After using an aftermar-
ket tire sealant it is recommended that you
take your vehicle to an authorized dealer-
ship to have your sensor function checked.
•
After inspecting or adjusting the tire pres-
sure always reinstall the valve stem cap.
This will prevent moisture and dirt from
entering the valve stem, which could dam-
age the TPMS sensor.
NOTE:
•
The TPMS is not intended to replace nor-
mal tire care and maintenance or to pro-
vide warning of a tire failure or condition.
•
The TPMS should not be used as a tire
pressure gauge while adjusting your tire
pressure.
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