User Manual - Page 64

For RAM 2020 PROMASTER.

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62 SAFETY
(Continued)
The TPMS will warn the driver of a low tire pres-
sure if the tire pressure falls below the low-pres-
sure warning limit for any reason, including 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 pres-
sure. Once the low tire pressure warning (TPMS
Warning Light) illuminates, you must increase
the tire pressure to the recommended cold
placard pressure in order for the TPMS Warning
Light to turn off. The system will automatically
update and the TPMS Warning Light will turn off
once the system receives the updated tire pres-
sures. 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.
NOTE:
When filling warm tires, the tire pressure may
need to be increased up to an additional 4 psi
(28 kPa) above the recommended cold placard
pressure in order to turn the TPMS Warning
Light off.
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 2F
(-7°C) will decrease the tire pressure to
approximately 23 psi (158 kPa). This tire
pressure is sufficiently low enough to turn on
the TPMS Warning Light. Driving the vehicle
may cause the tire pressure to rise to approx-
imately 27 psi (186 kPa), but the TPMS
Warning Light will still be on. In this situation,
the TPMS Warning Light will turn off only after
the tires are inflated to the vehicles recom-
mended cold placard pressure value.
NOTE:
The TPMS is not intended to replace normal
tire care and maintenance or to provide
warning of a tire failure or condition.
The TPMS should not be used as a tire pres-
sure gauge while adjusting your tire pressure.
Driving on a significantly under-inflated tire
causes the tire to overheat and can lead to
tire failure. Under-inflation also reduces fuel
efficiency and tire tread life, and may affect
the vehicle’s handling and stopping ability.
CAUTION!
The TPMS has been optimized for the orig-
inal equipment tires and wheels. TPMS
pressures and warning have been estab-
lished for the tire size equipped on your
vehicle. Undesirable system operation or
sensor damage 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 tire sealants may cause
the Tire Pressure Monitoring System
(TPMS) sensor to become inoperable. After
using an aftermarket tire sealant it is
recommended that you take your vehicle to
an authorized dealership 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
damage the TPMS sensor.
CAUTION!
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20_VF_OM_EN_US_t.book Page 62
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