538
PRIUS_OM_OM47E09U_(U)
6-3. Do-it-yourself maintenance
■Situations in which the tire pressure warning system may not oper-
ate properly
●In the following cases, the tire pressure warning system may no t operate
properly.
• If non-genuine Toyota wheels are used.
• When a replacement tire is used, the system may not operate cor-
rectly due to the structure of the replacement tire.
• A tire has been replac ed with a tire that is not of the specif ied size.
• Tire chains etc . are equipped.
• An auxiliary-supported ru n-flat tire is equipped.
• If a window tint that affects the radio wave signals is instal led.
• If there is a lot of snow or ice on the vehicle, particularly around the
wheels or wheel housings.
• If the tire inflation pressure is extremely higher than the sp ecified
level.
• If wheel without the tire pressure warning valve and transmitt er is
used.
• If the ID code on the tire pressure warning valves and transmi tters is
not registered in the tire pressure warning computer.
●Performance may be affected in the following situations.
• Near a TV tower, electric power plant, gas station, radio stat ion, large
display, airport or other facilit y that generates strong radio waves or
electrical noise
• When carrying a portable radio, cellular phone, cordless phone or
other wireless communication device
●When the vehicle is parked, the time taken for the warning to s tart or go
off could be extended.
●When tire inflation pressure declines rapidly for example when a tire has
burst, the warning may not function.
■The initialization operation
●Make sure to carry out initializ ation after adjusting the tire inflation pres-
sure.
Also, make sure the tires are co ld before carrying out initialization or tire
inflation pressure adjustment.
●If you have accidentally turned the power switch off during ini tialization,
it is not necessary to press the reset swit ch again as initialization will
restart automatically when the power switch has been turned to ON
mode for the next time.
●If you accidentally press the reset switch when initialization is not neces-
sary, adjust the tire inflation pressure to the specified level when the
tires are cold, and cond uct initialization again.
6427-2. Steps to take in an emergency
PRIUS_OM_OM47E09U_(U)
■The compact spare tire (if equipped)
●The compact spare tire is identified by the label “TEMPORARY USE
ONLY” on the tire sidewall.
Use the compact spar e tire temporarily, and only in an emergenc y.
●Make sure to check the tire inflation pressure of the compact s pare tire.
( P. 6 7 2 )
■When using the compact spare tire (if equipped)
As the compact spare tire is not equipped with a tire pressure warning
valve and transmitter, low inflation pressure of the spare tire will not be
indicated by the tire pressure warning system. Also, if you rep lace the
compact spare tire after the tire pressure warning light comes on, the light
remains on.
■When the compact spare tire is equipped (if equipped)
The vehicle height may become lower when driving with the compa ct
spare tire compared to when d riving with standard tires.
■If you have a flat front tire on a road covered with snow or ic e (vehi-
cles with compact spare tire)
Install the compact spare tire on one of the rear wheels of the vehicle.
Perform the following steps and f it tire chains to the front tires:
Replace a rear tire with the compact spare tire.
Replace the flat front tire with the tire removed from the rear of the vehi-
cle.
Fit tire chains to the front tires.
■Jack point
■Storing the jack The mark indicating the jack point is
stamped on the underside of the vehi-
cle.
Place the jack in the same direction as
the mark next to the storage space.
1
2
3
737Alphabetical index
PRIUS_OM_OM47E09U_(U)
P position switch ................... 256
Power door lock switches ..... 187
Power switch......................... 245
Power window switch............ 218
Rear window wiper and washer switch ..................... 281
Rear window and outside rear view mirror
defoggers switch ........ 440, 450
S-APGS switch ..................... 389
Seat heater switches ............ 457
“SOS” button ........................... 76
Talk switch
*
Telephone switches*
TRIP switch........................... 119
Vehicle-to-vehicle distance switch ................................. 334
VSC OFF switch ................... 422
Window lock switch............... 218
Windshield wipers and washer switch ..................... 275
Wireless charger power supply switch ...................... 477
Tail lights .................................. 263 Light switch ........................... 263
Replacing light bulbs............. 577
Talk switch
*
Telephone switch*
Theft deterrent system Immobilizer system ................. 95 Tire inflation pressure............. 542
Maintenance data ................. 672
Warning light......................... 595
Tire information ....................... 678 Glossary ............................... 684
Size....................................... 680
Tire Identification Number .... 680
Uniform Tire Quality
Grading .............................. 682
Tire pressure warning system.................................... 534
Function ................................ 534
Initializing .............................. 534
Installing tire pressure warning valves and
transmitters ........................ 534
Registering ID codes ............ 535
Warning light......................... 595
Tires .......................................... 532 Chains .................................. 431
Checking............................... 532
Emergency tire puncture repair kit ............................. 611
Glossary ............................... 684
If you have a flat tire ..... 611, 631
Inflation pressure .................. 542
Information............................ 678
Replacing.............................. 631
Rotating tires ........................ 533
Size....................................... 672
Snow tires ............................. 430
Spare tire ...................... 631, 672
Tire Identification Number .... 680
Tire pressure warning system .......... ...................... 534
Uniform Tire Quality
Grading .............................. 682
Warning light......................... 595
T
*: Refer to “NAVIGATION SYSTEM OWNER’S MANUAL” or “MULTIMEDIA OWNER’S MANUAL”.
