2008 TOYOTA HIGHLANDER Owners Manual

209
2-4. Using other
driving systems
2
When driving
■Turning off TRAC and VSC
Push and hold the button while
the vehicle is stopped to turn off
TRAC and Enhanced VSC.
The slip indicator light and VSC
OFF indicator light should come
on.
Push the button again to turn the
system back on.
■Automatic reactivation of TRAC and Enhanced VSC
Turning the “ENGINE START STOP” switch or the engine switch OFF after
turning off the TRAC and Enhanced VSC systems will automatically re-
enable them.
■ Automatic TRAC reactivation
If only the TRAC system is turned off, the TRAC system will turn on when
vehicle speed increases.
■ Automatic TRAC and Enha nced VSC reactivation
If the TRAC and Enhanced VSC systems are turned off, the systems will not
turn on even when vehicle speed increases.
■ Sounds and vibrations caused by the ABS, TRAC, Enhanced VSC,
brake assist
● A sound may be heard from the engine compartment when the engine is
started or just after the vehicle begins to move. This sound does not indi-
cate that a malfunction has occurred in any of these systems.
● Any of the following conditions may occur when the above systems are
operating. None of these indicates that a malfunction has occurred.
• Vibrations may be felt through the vehicle body and steering.
• A motor sound may be heard after the vehicle comes to a stop.
• The brake pedal may pulsate slightly when the ABS is activated.
• The brake pedal may move down slightly after the ABS is activated.

210 2-4. Using other driving systems
■EPS operation sound
When the steering wheel operates, a motor sound (whirring sound) may be
heard.
This does not indicate a malfunction.
■ Reduced effectiveness of EPS
The effectiveness of EPS is reduced to prevent the system from overheating
when there is frequent steering input over an extended period of time. The
steering wheel may feel heavy as a result. Should this occur, refrain from
excessive steering input or stop the vehicle and turn the engine off. The sys-
tem should return to normal within 10 minutes.
CAUTION
■The ABS does not operate effectively when
●Tires with inadequate gripping ability are used (such as excessively worn
tires on a snow covered road).
● The vehicle hydroplanes while driving at high speed on wet or slick road.
■ Stopping distance when the ABS is ope rating on the wet or slick roads
The ABS is not designed to shorten the vehicle's stopping distance. Always
maintain a safe distance from the vehicle in front of you in the following situ-
ations.
● 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 uneven roads
■ TRAC may not operate effectively when
Directional control and power may not be achievable while driving on slip-
pery road surfaces, even if the TRAC system is operating.
Do not drive the vehicle in conditions where stability and power may be lost.

211
2-4. Using other
driving systems
2
When driving
CAUTION
■When the Enhanced VSC is activated
The slip indicator light flashes and a warning buzzer sounds. Always drive
carefully. Reckless driving may cause an accident. Exercise particular care
when the indicator light flashes and a buzzer sounds.
■ When TRAC and Enhanced VSC are off
Be especially careful and drive at a speed appropriate to the road condi-
tions. As these are systems to ensure vehicle stability and driving force, do
not turn off TRAC and Enhanced VSC unless necessary.
■ 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 tires are inflated to the appro-
priate tire pressure level.
The ABS and Enhanced VSC systems will not function correctly if different
tires are fitted on the vehicle.
Contact your Toyota dealer for further information when replacing tires or
wheels.
■ Handling of tires and suspension
Using tires with any kind of problem or modifying the suspension will affect
the driving assist systems, and may cause the system to malfunction.

212
2-4. Using other driving systems
Hill-start assist control
■Hill-start assist control operating conditions
The system operates in the following situations:
●The shift lever is in the D or S position.
● The brake pedal is not depressed.
■ Hill-start assist control
●While hill-start assist control is operating, the brakes remain automati-
cally applied after the driver releases the brake pedal. The stop lights and
the high mounted stop light turn on.
CAUTION
■Hill-start assist control
●Hill-start assist control may not operate effectively on extremely steep
inclines or roads covered in ice.
● Do not use hill-start assist control to stop or park the vehicle on an incline.
Hill-start assist control helps to prevent the vehicle from rolling
backwards when starting on incline or slippery slope.
If the vehicle is in danger of
slipping, rolling backwards
when starting on an incline, or
the front wheels (2WD mod-
els) or four wheels (4WD mod-
els) spin, the indicator flashes
to indicate that the hill-start
assist control system have
been engaged.

213
2
When driving
2-4. Using other driving systems
Downhill Assist Control system (4WD models only)
When the downhill assist control system is operating
The slip indicator will flash to
indicate that the downhill assist
control system is operating, and
the stop lights and high mounted
stoplight will turn on.
■Conditions in which the downhill assi st control system does not operate
In the following situations, the downhill assist control system indicator flashes
and the downhill assist control system does not operate or will stop operating:
● The shift lever is not in 1 range of S mode or R.
● The vehicle speed is higher than 15 mph (25 km/h.)
With the downhill assist control system, the vehicle is able to
descend a steep hill, maintaining a constant low speed without brake
pedal operation.
■ Activating the downhill assist control system
Press the “DAC” switch.
The downhill assist control sys-
tem indicator will come on to
indicate that the downhill assist
control system is activated.
Pressing the switch again turns
the system off.

214 2-4. Using other driving systems
■If the “DAC“switch is turned off du ring operation of the downhill assist
control system
The downhill assist control system gradually ceases operation. The downhill
assist control system indicator will flash during the cancelling operation, and
then go off when the system is fully off.
■ Downhill assist control system operation sound
A sound may be heard from the engine compartment during operation of the
downhill assist control system. This sound does not indicate a malfunction.
■ When the downhill assist contro l system operates continuously
The brake actuator may overheat. In that case, the system will cease opera-
tion and a buzzer will sound to alert the driver. Stop the vehicle in a safe
place. (Do not continue normal driving.)
■ System malfunction
●The downhill assist control system indicator does not come on when the
“ENGINE START STOP“ switch of the engine switch is turned to ON.
● The downhill assist control system indicator does not come on when the
“DAC“ switch is pressed. In the above cases have your vehicle checked
by your Toyota dealer.
CAUTION
■Conditions which may affect th e downhill assist control system
The system may not operate on the following surfaces, which may lead to an
accident causing death or serious injury.
● Slippery surface such as wet or muddy roads
● Icy surfaces
● Unpaved roads

214
2-5. Driving information
Off-road precautions
Off-road vehicle feature● Specific design characteristics give it a higher center of gravity
than ordinary passenger cars. This vehicle design feature causes
this type of vehicle to be more likel y to rollover. And, utility vehicles
have a significantly higher rollover rate than other types of vehi-
cles.
● An advantage of the higher ground clearance is a better view of the
road allowing you to anticipate problems.
● It is not designed for cornering at the same speeds as ordinary
passenger cars any more than lo w-slung sports cars designed to
perform satisfactorily under off-road conditions. Therefore, sharp
turns at excessive speeds may cause rollover.
This vehicle belongs to the utility vehicle class, which has higher
ground clearance and narrower tread in relation to the height of its
center of gravity to make it capable of performing in a wide variety
of off-road applications.

215
2-5. Driving information
2
When driving
CAUTION
■
Off-road vehicle precautions
Always observe the following precautions to minimize the risk of serious per-
sonal injury or damage to your vehicle:
●In a rollover crash, an unbelted person is significantly more likely to die
than a person wearing a seat belt. Therefore, the driver and all passengers
should fasten their seat belts whenever the vehicle is moving.
● Avoid sharp turns or abrupt maneuvers, if at all possible.
Failure to operate this vehicle correctly may result in loss of control or
vehicle rollover causing death or serious injury.
● Loading cargo on the roof luggage carrier will make the center of the vehi-
cle gravity higher. Avoid high speeds, sudden starts, sharp turns, sudden
braking or abrupt maneuvers, otherwise it may result in loss of control or
vehicle rollover due to failure to operate this vehicle correctly.
● Always slow down in gusty crosswinds. Because of its profile and higher
center of gravity, your vehicle is more sensitive to side winds than an ordi-
nary passenger car. Slowing down will allow you to have better control.
● Do not drive horizontally across steep slopes. Driving straight up or
straight down is preferred. Your vehicle (or any similar off-road vehicle)
can tip over sideways much more easily than forward or backward.