traction control TOYOTA TACOMA 1999 Owners Manual

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Good driving practice
If it is difficult to shift into reverse, put
the transmission in neutral, release the
clutch pedal momentarily, and then try
again.
When towing a trailer, in order to main-
tain engine braking efficiency, do not
use the fifth gear.
CAUTION
Be careful when downshifting on a
slippery surface. Abrupt shifting
could cause the vehicle to spin or
skid.
NOTICE
Make sure the vehicle is completely
stopped before shifting into reverse.
Use the front drive control lever to se-
lect the following transfer modes.
ºH2º (high speed position, two- wheel
drive): Lever at ºH2º
Use this for normal driving on dry hard-
surfaced roads. This position gives greater
economy, quietest ride and least wear.
ºH4º (high speed position, four- wheel
drive): Lever at ºH4º
Use this for normal driving on wet, icy or
snow- covered roads. This position pro-
vides greater traction than two- wheel
drive. ºNº (neutral position):
Lever at ºNº
No power is delivered to the wheels. The
vehicle must be stopped.
ºL4º (low speed position, four- wheel
drive): Lever at ºL4º
Use this for maximum power and traction.
Use ºL4º for climbing or descending steep
hills, off- road driving, and hard pulling in
sand, mud or deep snow.
The four- wheel drive indicator light comes
on when the ºH4º, ºNº or ºL4º mode is
selected.
See º(d) Shifting procedure (lever type)º
for further instructions.
Four- wheel drive systemÐ
(a) Front drive control
(lever type)

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Use the front drive control lever and
º4WDº button to select the following
transfer modes.
ºH2º (high speed position, two- wheel
drive): Lever at ºHº, º4WDº button left out
Use this for normal driving on dry hard-
surfaced roads. This position gives greater
economy, quietest ride and least wear.
ºH4º (high speed position, four- wheel
drive): Lever at ºHº, º4WDº button pushed
in.
Use this for normal driving on wet, icy or
snow- covered roads. This position pro-
vides greater traction than two- wheel
drive. ºNº (neutral position):
Lever at ºNº
No power is delivered to the wheels. The
vehicle must be stopped.
ºL4º (low speed position, four- wheel
drive): Lever at ºL4º
Use this for maximum power and traction.
Use ºL4º for climbing or descending steep
hills, off- road driving, and hard pulling in
sand, mud or deep snow.
The four- wheel drive indicator light comes
on when the ºH4º, ºNº or ºL4º mode is
selected.
See º(d) Shifting procedure (lever/button
type)º for further instructions. (b) Free- wheeling hubsTo engage the free- wheeling hubs, turn
the hubs to ºLOCKº. To disengage, turn
the hubs to ºFREEº.
Make sure the triangle mark on the hub
aligns with the other one at the side you
wish to set.
Setting the free- wheeling hubs in ºFREEº
allows you to disengage the front axle and
driveshaft so that they are not revolving.
This reduces noise and wear when the
vehicle is in two- wheel drive.
You should drive with the hubs in ºLOCKº
for at least 16 km (10 miles) each month.
This will assure that the front drive com-
ponents are lubricated.
(a) Front drive control
(lever/button type)

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WHEN TO USE SNOW TIRES OR
CHAINS
Snow tires or chains are recommended
when driving on snow or ice.
On wet or dry roads, conventional tires
provide better traction than snow tires.
SNOW TIRE SELECTION
If you need snow tires, select the same
size, construction and load capacity as
the original tires on your Toyota.
Do not use tires other than those men-
tioned above. Do not install studded tires
without first checking local regulations for
possible restrictions.
SNOW TIRE INSTALLATION
Snow tires should be installed on all
wheels.
Installing snow tires on the rear w
heels
only can lead to an excessive difference
in road grip capab ility between the front
and rear tires which could cause loss of
vehicle control.
When storing removed tires, you should
store them in a cool dry place.
Mark the direction of rotation and be sure
to install them in the same direction when
replacing.
CAUTION
Do not drive with the snow tires
incorrectly inflated.
Never drive over 120 km/h (75 mph)
with any type of snow tires.
TIRE CHAIN SELECTION
Use the tire chains of correct size.
Regulations regarding the use of tire
chains vary according to location or
type of road, so always check them
before installing chains.
CHAIN INSTALLATION
Install the chains on the rear tires as
tightly as possible. Do not use tire
chains on the front tires. Retighten
chains after driving 0.5Ð1.0 km
(1/4Ð1/2 mile).
When installing chains on your tires, care-
fully follow the instructions of the chain
manufacturer.
If wheel covers are used, they will be
scratched by the chain band, so remove
the covers before putting on the chains.
CAUTION
Do not exceed 50 km/h (30 mph) or
the chain manufacturer 's recom-
mended speed limit, whichever is
lower.
Drive carefully avoiding bumps,
holes, and sharp turns, which may
cause the vehicle to bounce.
Avoid sharp turns or locked- wheel
braking, as use of chains may ad-
versely affect vehicle handling.
Installing snow tires and
chains

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This information has been prepared in ac-
cordance with regulations issued by the
National Highway Traffic Safety Adminis-
tration of the U.S. Department of Trans-
portation. It provides the purchasers and/
or prospective purchasers of Toyota
vehicles with information on uniform tire
quality grading.
Your Toyota dealer will help answer any
questions you may have as you read this
information.
DOT quality gradesÐAll passenger ve-
hicle tires must conform to Federal
Safety Requirements in addition to
these grades. These quality grades are
molded on the sidewall.
TreadwearÐ
The treadwear grade is a
comparative rating based on the wear rate
of the tire when tested under controlled
conditions on a specified government test
course. For example, a tire graded 150
would wear one and a half (1- 1/2) times
as well on the government course as a
tire graded 100. The relative performance
of tires depends upon the actual condi-
tions of their use, however, and may de-
part significantly from the norm due to
variations in driving habits, service prac-
tices and differences in road characteris-
tics and climate. Traction AA, A, B, CÐ
The traction
grades, from highest to lowest, are AA, A,
B, and C, and they represent the tire's
ability to stop on wet pavement as mea-
sured under controlled conditions on spe-
cified government test surfaces of asphalt
and concrete. A tire marked C may have
poor traction performance.
Warning: The traction grade assigned to
this tire is based on braking (straight
ahead) traction tests and does not include
cornering (turning) traction.
Temperature A, B, CÐ The temperature
grades are A (the highest), B, and C,
representing the tire's resistance to the
generation of heat and its ab ility to dissi-
pate heat when tested under controlled
conditions on a specified indoor laboratory
test wheel. Sustained high temperature
can cause the material of the tire to de-
generate and reduce tire life, and exces-
sive temperature can lead to sudden tire
failure. The grade C corresponds to a lev-
el of performance which all passenger car
tires must meet under the Federal Motor
Vehicle Safety Standard No. 109. Grades
B and A represent higher levels of perfor-
mance on the laboratory test wheel than
the minimum required by law. Warning: The temperature grades for this
tire are established for a tire that is prop-
erly inflated and not overloaded. Exces-
sive speed, underinflation, or excessive
loading, either separately or in combina-
tion, can cause heat buildup and possible
tire failure.
Uniform tire quality grading
(except vehicles with 31

10.5R15LT tires)