548
5-2. Steps to take in an emergency
PRIUS PHV_OM_OM47A11U_(U)
CAUTION
As an added safety feature, your vehicle has been equipped with a tire
pressure monitoring system (TPMS-tire pressure warning system) that
illuminates a low tire pressure telltale (tire pressure warning light) when
one or more of your tires is significantly under-inflated. Accordingly,
when the low tire pressure telltale (tire pressure warning light) illumi-
nates, you should stop and check your tires as soon as possible, and
inflate them to the proper 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.
Please note that the TPMS (tire pressure warning system) is not a sub-
stitute for proper tire maintenance, and it is the driver’s responsibility to
maintain correct tire pressure, even if under-inflation has not reached the
level to trigger illumination of the TPMS low tire pressure telltale (tire
pressure warning light).
Yo u r v e h i c l e h a s a l s o b e e n e q u i p p e d w i t h a T P M S ( t i r e p r e s s u r e w a r n i n g
system) malfunction indicator to indicate when the system is not operat-
ing properly. The TPMS (tire pressure warning system) malfunction indi-
cator is combined with the low tire pressure telltale (tire pressure
warning light). When the system detects a malfunction, the telltale will
flash for approximately one minute and then remain continuously illumi-
nated. This sequence will continue upon subsequent vehicle start-ups as
long as the malfunction exists. When the malfunction indicator is illumi-
nated, the system may not be able to detect or signal low tire pressure
as intended.
5
When trouble arises
549
5-2. Steps to take in an emergency
PRIUS PHV_OM_OM47A11U_(U)
CAUTION
TPMS (tire pressure warning system) malfunctions may occur for a vari-
ety of reasons, including the installation of replacement or alternate tires
or wheels on the vehicle that prevent the TPMS (tire pressure warning
system) from functioning properly. Always check the TPMS (tire pres-
sure warning system) malfunction telltale after replacing one or more
tires or wheels on your vehicle to ensure that the replacement or alter-
nate tires and wheels allow the TPMS (tire pressure warning system) to
continue to function properly.
NOTICE
■To e n s u r e t h e t i r e p r e s s u r e w a r n i n g s y s t e m o p e r a t e s p r o p e r l y
Do not install tires with different specifications or makers, as the tire
pressure warning system may not operate properly.
675
Abbreviation list
PRIUS PHV_OM_OM47A11U_(U)
LEDLight Emitting Diode
MMTMethylcyclopentadienyl Manganese Tricarbonyl
M + SMud and Snow
MTBEMethyl Tertiary Butyl Ether
OBDOn Board Diagnostics
PCSPre-Collision System
PHVPlug-in Hybrid Vehicle
PWRPower
SRSSupplemental Restraint System
TINTire Identification Number
TPMSTire Pressure Monitoring (Warning) System
TRACTraction Control
TWITreadwear Indicator
VINVe h i c l e I d e n t i f i c a t i o n N u m b e r
VSCVe h i c l e Sta b i l i t y C o n t r o l
ABBREVIATIONSMEANING
