2008 TOYOTA HIGHLANDER engine overheat

1
2
3
4
5
6
7
5
4-2. Maintenance ...................... 404Maintenance requirements ..................... 404
General maintenance.......... 406
Emission inspection and maintenance (I/M)
programs........................... 409
4-3. Do-it-yourself maintenance .................... 410
Do-it-yourself service precautions ....................... 410
Hood ................................... 414
Positioning a floor jack ........ 416
Engine compartment ........... 419
Tires .................................... 433
Tire inflation pressure ......... 443
Wheels ................................ 447
Air conditioning filter............ 449
Key battery .......................... 452
Checking and replacing fuses ................................. 455
Light bulbs........................... 466
5-1. Essential information ....... 478 If your vehicle needs to be towed ........................... 478
If you think something is wrong ............................ 485
Fuel pump shut off system .............................. 486
Event data recorder ............ 487 5-2. Steps to take in an
emergency ...................... 489
If a warning light turns on or a warning buzzer
sounds... .......................... 489
If a warning message is displayed (vehicles with
multi-information
display) ............................. 498
If you have a flat tire ........... 499
If the engine will not start .................................. 510
If the shift lever cannot be shifted from P ................... 512
If you lose your keys/ wireless remote control
transmitter ........................ 513
If the electronic key does not operate properly
(vehicles with smart
key system) ...................... 514
If the battery is discharged........................ 516
If your vehicle overheats ......................... 520
If the vehicle becomes stuck ................................. 523
6-1. Specifications ................... 526 Maintenance data (fuel, oil level, etc.) ........... 526
Fuel information.................. 539
Tire information .................. 542
6-2. Customization................... 554 Customizable features........ 554
5When trouble arises
6Vehicle specifications

159
2-1. Driving procedures
2
When driving
CAUTION
●
Do not under any circumstances shift the shift lever to P, R or N while the
vehicle is moving.
Doing so can cause significant damage to the transmission system and
may result in a loss of vehicle control.
● Do not shift the shift lever to N while the vehicle is moving.
Doing so may cause the engine brake to not operate properly and lead to
an accident.
● Do not turn the engine off while driving.
The power steering and brake booster systems will not operate properly if
the engine is not running.
● Use engine braking (downshift) to maintain a safe speed when driving
down a steep hill.
Using the brakes continuously may cause the brakes to overheat and lose
effectiveness. ( P. 171)
● When stopped on an inclined surface, use the brake pedal and parking
brake to prevent the vehicle from rolling backward or forward and causing
an accident.
● Do not adjust the position of the steering wheel, the seat, or the inside or
outside rear view mirrors while driving.
Doing so may result in a loss of vehicle control that can cause accidents
that may result in death or serious injury.
● Always check that all passengers' arms, heads or other parts of their bod-
ies are not outside the vehicle, as this may result in death or serious injury.
● Do not drive in excess of the speed limit. Even if the legal speed limit per-
mits it, do not drive over 85 mph (140 km/h) unless your vehicle has high-
speed capability tires. Driving over 85 mph (140 km/h) may result in tire
failure, loss of control and possible injury. Be sure to consult a tire dealer
to determine whether the tires on your vehicle are high-speed capability
tires or not before driving at such speeds.
■ When driving on slippery road surfaces
●Sudden braking, acceleration and steering may cause tire slippage and
reduce your ability to control the vehicle, resulting in an accident.

161
2-1. Driving procedures
2
When driving
CAUTION
●
Always apply the parking brake, shift the shift lever to P, stop the engine
and lock the vehicle.
Do not leave the vehicle unattended while the engine is running.
● Do not touch the exhaust pipe while the engine is running or immediately
after turning the engine OFF.
Doing so may cause burns.
● Do not leave the engine running in an area with snow build-up, or where it
is snowing. If snowbanks build up around the vehicle while the engine is
running, exhaust gases may collect and enter the vehicle. This may lead
to death or a serious health hazard.
■ Exhaust gases
Exhaust gases include harmful carbon monoxide (CO) that is colorless and
odorless. Inhaling exhaust gases may lead to death or a serious health haz-
ard.
●If the vehicle is in a poorly ventilated area, stop the engine. In a closed
area, such as a garage, exhaust gases may collect and enter the vehicle.
This may lead to death or a serious health hazard.
● The exhaust should be checked occasionally. If there is a hole or crack
caused by corrosion, damage to a joint or abnormal exhaust noise, be
sure to have the vehicle inspected and repaired by your Toyota dealer.
Failure to do so may allow exhaust gases to enter the vehicle, resulting in
death or a serious health hazard.
■ When taking a nap in the vehicle
Always turn the engine off. Otherwise, you may accidentally move the shift
lever or depress the accelerator pedal, which could cause an accident or fire
due to engine overheating. Additionally, if the vehicle is parked in a poorly
ventilated area, exhaust gases may collect and enter the vehicle, leadin\
g to
death or a serious health hazard.
■ When braking the vehicle
●When the brakes are wet, drive more cautiously.
Braking distance increases when the brakes are wet, and may cause one
side of the vehicle to brake differently than the other side. Also the parking
brake may not securely hold the vehicle.

170 2-1. Driving procedures
NOTICE
■To prevent battery discharge
Do not leave the key in the “ACC” or “ON” position for a long period if the
engine is not running.
■ When starting the engine
●Do not crank for more than 30 seconds at a time. This may overheat the
starter and wiring systems.
● Do not race a cold engine.
● If the engine becomes difficult to start or stalls frequently, have the engine
checked immediately.

178 2-2. Instrument cluster
Instrument panel light controlThe brightness of the instrument panel lights can be adjusted.
Brighter
Darker
When the headlight switch is
turned to ON, the brightness
will be reduced slightly unless
the control dial is turned fully
up.
Odometer/Trip meterOdometer
Displays the total distance the vehicle has been driven.
Trip meter
Displays the distance the vehi cle has been driven since the
meter was last reset. Trip meters A and B can be used to
record and display different distances independently.
NOTICE
■ To prevent damage to the engine and its components
●Do not let the indicator needle of the tachometer enter the red zone, which
indicates the maximum engine speed.
● The engine may be overheating if the temperature gauge is in the red
zone (H). In this case, immediately stop the vehicle in a safe place. Check
the engine after it has cooled completely. (
P. 520)

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.

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

233
2-5. Driving information
2
When driving
●
Note that when making a turn, th e trailer wheels will be closer than
the vehicle wheels to the inside of the turn. Compensate by making
a larger than normal turning radius.
● Crosswinds and rough roads will adversely affect handling of your
vehicle and trailer, causing sway . Periodically check the rear to
prepare for being passed by large trucks or buses, which may
cause your vehicle and trailer to sway. If swaying occurs, firmly grip
the steering wheel, reduce speed immediately but gradually, and
steer straight ahead. Never increase speed. If you make no
extreme correction with the stee ring or brakes, your vehicle and
trailer will stabilize.
● Take care when passing other vehicles. Passing requires consider-
able distance. After passing a vehicle, do not forget the length of
your trailer, and be sure you hav e plenty of room before changing
lanes.
● In order to maintain engine braking efficiency when driving on a
long steep downgrade, do not use overdrive. Transmission shift
range position must be in 4, in the S mode.
● Due to the added load of the trailer, your vehicle's engine may
overheat on hot days (at temperatures over 85°F [30°C]) when
driving up a long or steep grade. If the engine coolant temperature
gauge indicates overheating, immedi ately turn off the air condition-
ing (if in use), pull your vehicle off the road and stop in a safe spot.
(  P. 520)