snow chains LEXUS LX470 2007 Owners Manual

145
2-4. Using other driving systems
2
When driving
CAUTION
Any of the following conditions may result in an accident which could cause death or
serious injury:
■The ABS does not operate effectively when
●The limits of tire gripping performance have been exceeded.
●The vehicle hydroplanes while driving at high speed on the wet or slick road.
■Stopping distance when the ABS is operating on the wet or slick roads
The ABS is not designed to shorten the ve hicle’s stopping distance. Always main-
tain a safe distance from the vehicle in front of you in the following situations.
●When driving on dirt, gravel or snow-covered roads
●When driving with tire chains
●When driving over bumps in the road
●When driving over roads with potholes or roads with uneven roads
■TRAC may not operate effectively when
Directional control and power may not be ac hievable while driving on slippery road
surfaces, even if the TRAC is operating.
Do not drive the vehicle in conditions where stability and power may be lost.
■When the VSC is activated
The slip indicator light flashes and a warning buzzer sounds. Always drive carefully.
Reckless driving may cause an accident. Ex ercise particular care when the indica-
tor light flashes and a buzzer sounds.
■Replacing tires
Make sure that all tires are of the same size, brand, tread pattern and total load
capacity. In addition, make sure that the ti res are inflated to the specified tire pres-
sure level.
The ABS and VSC will not function correctly if different tires are fitted on the vehi-
cle.
Contact your Lexus dealer for further info rmation when replacing tires or wheels.

156
2-5. Driving information
Winter driving tips
Carry out the necessary preparations and inspections before driving the
vehicle in winter. Always drive the vehicle in a manner appropriate to the
prevailing weather conditions.
■ Pre-winter preparations
●Use fluids that are appropria te to the prevailing outside tempera-
tures.
• Engine oil
• Engine coolant
• Washer fluid
● Have a service technician inspect the level and specific gravity of
battery electrolyte.
● Have the vehicle fitted with four snow tires or purchase a set of
tire chains for the rear tires.
Ensure that all tires are the same size and brand, and that chains match
the size of the tires.

158
2-5. Driving information
Selection tire chainsUse the correct tire chain size when mounting the snow chains.
Chain size is regulated for each tire size.
Side chain
(3.5 mm [0.14 in.] in diameter)
Cross chain
(4 mm [0.16 in.] in diameter)
Regulations on the use of snow chains● Regulations regarding the use of tire chains vary according to location
and type of road. Alwa ys check local regulations before installing
chains.
● Retighten the chains after driving 1 /4 - 1 /2 mile (0.5 - 1.0 km).
■Snow chain installation
Observe the following precautions when installing and removing chains.
●Install and remove tire chains in a safe location.
●Install tire chains on the rear tires.
●Install tire chains following the inst ructions provided in the accompanying
instructions.

159
2-5. Driving information
2
When driving
CAUTION
■Driving with snow tires
Observe the following precautions to reduce the risk of accidents.
Failing to do so may result in a loss of vehicle control and cause death or serious
injury.
●Use tires of the size specified for your vehicle.
●Maintain the specified level of tire inflation pressure.
●Do not drive in excess of 75 mph (120 km/h), regardless of the type of snow tires
being used.
●Snow tires should be installed on all wheels.
■Driving with snow chains
Observe the following precautions to reduce the risk of accidents.
Failing to do so may result in the vehicle being unable to be driven safely, and may
cause death or serious injury.
●Do not drive in excess of the speed limit specified for the tire chains being used,
or 30 mph (50 km/h), whichever is lower.
●Avoid driving on bumpy road surfaces or over potholes.
●Avoid sudden turns and braking, as use of chains may adversely affect vehicle
handling.
●Slow down sufficiently before entering a curve to ensure that vehicle control is
maintained.
NOTICE
■Repairing or replacing snow tires
Request repairs of and obtain replacement snow tires from Lexus dealers or legiti-
mate tire retailers.
This is because the removal and attachment of snow tires affects the operation of
the tire pressure warning valves and transmitters.
■Fitting tire chains
The tire pressure warning valves and transmitters may not function correctly when
tire chains are fitted.

5
When trouble arises
343
5-2. Steps to take in an emergency
■When the tire pressure warning light comes on
Check the tire inflation pressure and adjust to the appropriate level. Pushing the tire
pressure warning reset switch does not turn off the tire pressure warning light.
■The tire pressure warning light may come on due to natural causes
The tire pressure warning light may come on due to natural causes such as natural
air leaks or tire inflation pressure changes caused by temperature. In this case,
adjusting the tire inflation pressure will turn off the warning light.
■If the tire pressure warning system is inoperative
The tire pressure warning system may become inoperative in the following condi-
tions:
(When the condition becomes normal, the system will work properly.)
●If tires not equipped with tire pressure warning valves and transmitters are used.
●If the ID code on the tire pressure warning valves and transmitters is not regis-
tered.
●If electronic devices or facilities using similar radio wave frequencies are nearby.
●If a radio set at similar frequencies is in use in the vehicle.
●If a window tint that affects the radio wave signals is installed.
●If the tire pressure warning select switch is set to a different tire setting.
●If there is a lot of snow or ice on the vehicle, in particular around the wheels or
wheel housings.
●If non-genuine Lexus wheels are used.
●If tire chains are used.
●If the spare tire is in a location subject to poor radio wave signal reception.
●If the tire inflation pressure is 73 psi (500 kPa, 5.1 kgf/cm2 or bar) or higher.
■If the tire pressure warning light blinks
If the tire pressure warning light blinks when the ignition key is turned to the “ON”
position, have it checked by your Lexus dealer.
■Changing the engine oil (U.S.A. only)
Make sure to reset oil change system

404
Alphabetical index
Storage feature....................................... 215
StuckIf your vehicle becomes stuck.....366
Sun visors .................................................. 221
Sunshade Roof ..............................................................42
Switch Driving mode select switch ........... 100
Fog light switch .......................................114
Ignition switch......................................... 95
Light switches ..........................................112
Power door lock switch ....................... 5
Power quarter window switch....... 40
Power window switch .........................37
Rear window wiper and washer switch ...................................................... 118
Window lock switch ........................... 38
Wipers and washer switch .............. 115
Tachometer Tachometer ........................................... 104
Tail lights Switch ..........................................................112
Wattage...................................................377
Theft deterrent system Alarm .......................................................... 49
Engine immobilizer system ..............47
Theft prevention labels ........................... 51
Tire inflation pressure .........................302
Tie-down hooks .....................................235
Tire information Glossary.................................................386
Size ...........................................................383
Tire identification number ............. 382
Uniform tire quality grading .........384 Tires
Chains....................................................... 156
Checking................................................292
If you have a flat tire ......................... 346
Inflation pressure ............................... 302
Information ............................................. 381
Pressure warning system ...............292
Replacing .............................................. 346
Rotating tires.........................................292
Size ............................................................376
Snow tires................................................ 156
Spare tire ............................................... 346
Tools........................................................... 346
Total load capacity ................................ 155
Towing Dinghy towing ...................................... 169
Emergency towing ........................... 328
Trailer towing ........................................160
TRAC (Active traction control) .......142
Trailer towing .......................................... 160
Trip information display ........................ 110
Trip meter ................................................. 104
Turn signal lights Switch ........................................................ 102
Wattage .................................................. 377
Valet key .........................................................2
Vanity lights Vanity lights........................................... 222
Wattage .................................................. 377
Vanity mirrors ........................................ 222
Vehicle identification number......... 369
VGRS (Variable gear ratio steering) ..................................................142
VSC (Vehicle stability control).........142
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