Jeep 2013 Grand Cherokee - User Guide - Manual (Page 99)

• When the malfunction indicator is illuminated, the system may not be able to
detect or signal low tire pressure as intended. TPMS malfunctions may occur for a
variety of reasons, including the installation of replacement or alternate tires or
wheels on the vehicle that prevent the TPMS from functioning properly. Always
check the TPMS malfunction telltale after replacing one or more tires or wheels on
your vehicle, to ensure that the replacement or alternate tires and wheels allow the
TPMS to continue to function properly.
NOTE:
Tire pressures change by approximately 1 psi (7 kPa) per 12° F (7° C) of air temperature
change. Keep this in mind when checking tire pressure inside a garage, especially in
the Winter. Example: If garage temperature is 68°F (20°C) and the outside temperature
is 32°F (0°C), then the cold tire inflation pressure should be increased by 3 psi
(21 kPa), which equals 1 psi (7 kPa) for every 12°F (7°C) for this outside temperature
condition.
CAUTION!
The TPMS has been optimized for the original equipment tires and wheels. TPMS
pressures and warning have been established 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. After-
market wheels can cause sensor damage. Do not use tire sealant from a can, or
balance beads if your vehicle is equipped with a TPMS, as damage to the sensors
may result.
BRAKE - Brake Warning Light
• The Brake Warning light illuminates when there is either a system malfunction or
the parking brake is applied. If the light is on and the parking brake is not applied,
it indicates a possible brake hydraulic malfunction, brake booster problem or an
Anti-Lock Brake System problem.
• Please have your vehicle serviced immediately.
WARNING!
Driving a vehicle with the red brake light on is dangerous. Part of the brake system
may have failed. It will take longer to stop the vehicle. You could have a collision.
Have the vehicle checked immediately.
WHAT TO DO IN EMERGENCIES
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