Page 420 of 596
4206-3. Do-it-yourself maintenance
4RUNNER (U)
Check if the treadwear indicators are showing on the tires. Also check
the tires for uneven wear, such as excessive wear on one side o f the
tread.
Check the spare tire condition and pressure if not rotated.
New tread
Worn tread
Treadwear indicator
The location of treadwear indicators is shown by a “TWI” or “ ” mark,
etc., molded into the s idewall of each tire.
Replace the tires if the treadwear indicators are showing on a tire.
Tires
Replace or rotate tires in accordance with maintenance sched-
ules and treadwear.
Checking tires
1
2
3
Page 428 of 596

4286-3. Do-it-yourself maintenance
4RUNNER (U)■
Situations in which the tire pressure warning system may not op
er-
ate properly
●In the following cases, the tire pressure warning system may no t operate
properly.
• If non-genuine Toyota wheels are used.
• A tire has been replaced with a tire that is not an OE (Original Equip-
ment) tire.
• A tire has been replac ed with a tire that is not of the specif ied size.
• Tire chains etc . are 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 the spare tire is in a location subject to poor radio wave signal
reception.
• If a large metallic object whic h can interfere with signal reception is
put near the spare tire.
• If tires not equipped with the tire pressure warning valves an d trans-
mitters are 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.
Page 493 of 596
4937-2. Steps to take in an emergency
7
When trouble arises
4RUNNER (U)
Spare tire
Jack
Tool bag
Location of the spare tire, jack and tools
1
2
3
Page 592 of 596

592Alphabetical index
4RUNNER (U)
Shift lock system ..................... 220
Side airbags ............................... 35
Side marker lights ................... 225Light switch ........................... 225
Replacing light bulbs............. 455
Wattage ................................ 531
Side mirrors ............................. 160 Adjusting and folding ............ 160
Side turn signal lights ............. 223
Slide deck ................................. 368
Smart key system .................... 118 Antenna location ................... 118
Entry functions ...................... 110
Starting the engine................ 212
Snow tires ................................ 333
Spare tire .................................. 492 Inflation pressure .................. 530
Storage location .................... 493
Spark plug ................................ 526
Specifications .......................... 522
Speedometer .............................. 88
Steering lock ............................ 215 Column lock release ............. 215
Steering lock system
warning message ............... 215
Steering wheel ......................... 156 Adjustment ............................ 156
Storage feature ........................ 358
Storage precautions ................ 189
Stuck If the vehicle becomes stuck ................................... 520
Sun visors ................................ 370 Switches
Automatic High Beam
switch ................................. 231
Cruise control switch ............ 273
Door lock switches................ 113
Driving position memory switches ............................. 149
Emergency flashers switch ... 464
Engine switch ............... 209, 212
Fog light switch ..................... 235
Garage door opener
switches ............................. 382
Ignition switch ............... 209, 212
LDA (Lane Departure Alert) switch ................................. 265
Light switches ....................... 225
Moon roof switches............... 170
Outside rear view mirror switches ............................. 160
Power back window
switch ................................. 166
Power door lock switch ......... 113
Power window switches........ 162
Rear window and outside rear view mirror defoggers
switch ......................... 342, 348
Rear window wiper and
washer switch..................... 240
Seat heater switches ............ 353
Seat ventilator switches ........ 353
“SOS” button........................... 70
Telephone switches
*
VSC OFF switch ................... 323
Window lock switch .............. 162
Windshield wipers and washer switch.............. 237