2010 TOYOTA HIGHLANDER HYBRID engine overheat

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4-1. Maintenance and careCleaning and protecting the vehicle exterior............ 414
Cleaning and protecting the vehicle interior............. 417
4-2. Maintenance Maintenance requirements ..................... 420
General maintenance.......... 422
Emission inspection and maintenance (I/M)
programs........................... 425
4-3. Do-it-yourself maintenance Do-it-yourself service precautions ....................... 426
Hood ................................... 430
Positioning a floor jack ........ 432
Engine compartment ........... 434
Tires .................................... 449
Tire inflation pressure ......... 457
Wheels ................................ 460
Air conditioning filter............ 462
Electronic key battery.......... 465
Checking and replacing fuses ................................. 468
Light bulbs........................... 479 5-1. Essential information
Emergency flashers............ 492
If your vehicle needs to be towed........................... 493
If you think something is wrong ............................ 499
Event data recorder ............ 500
5-2. Steps to take in an emergency
If a warning light turns on or a warning buzzer
sounds... .......................... 502
If a warning message is displayed .......................... 511
If you have a flat tire ........... 512
If the hybrid system will not start ............................ 524
If the shift lever cannot be shifted from P ................... 526
If you lose your keys........... 527
If the electronic key does not operate properly ......... 528
If the 12-volt battery is discharged........................ 530
If your vehicle overheats .... 534
If the vehicle becomes stuck ................................. 538
4Maintenance and care5When trouble arises

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2-1. Driving procedures
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When driving
CAUTION
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Do not shift the shift lever to R while the vehicle is moving forward.
Doing so can damage the transmission and may result in a loss of vehicle\
control.
● Do not shift the shift lever to D while the vehicle is moving backward.
Doing so can damage the transmission and may result in a loss of vehicle\
control.
● Moving the shift lever to N while the vehicle is moving will disengage the
hybrid system. Engine braking is not available with the hybrid system dis-
engaged.
● During normal driving, do not turn off the hybrid system. Turning the hybrid
system off while driving will not cause loss of steering or braking control,
but the power assist to these systems will be lost. This will make it more
difficult to steer and brake, so you should pull over and stop the vehicle as
soon as it is safe to do so.
However, in the event of an emergency, such as if it becomes impossible
to stop the vehicle in the normal way: P. 502
● Use engine braking 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. 186)
● 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.

192 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 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.
■ Power meter “CHARGE” zone
The “CHARGE” zone indicates r egeneration* status. Regenerated energy
will be used to charge the battery.
*: When used in this manual, “regeneration” refers to the conversion of energy created by the movement of the vehicle into electrical energy.
NOTICE
■To prevent damage to the engine and its components
The gasoline 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, and
check the engine after it has cooled completely. (
P. 534)

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2-5. Driving information
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When driving
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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.
● Due to the added load of the trailer, your vehicle's hybrid system
may overheat on hot days (at temperatures over 85°F [30°C])
when driving up a long or steep grade. If the engine coolant tem-
perature gauge indicates overheati ng, immediately turn off the air
conditioning (if in use), pull your vehicle off the road and stop in a
safe spot. ( P. 534)
● Always place wheel blocks under both the vehicle and the trailer
wheels when parking. Apply the parking brake firmly, and put the
transmission in P. Avoid parking on a slope, but if unavoidable, do
so only after performing the following:
Apply the brakes and keep them applied.
Have someone place wheel blocks under both the vehicle and
trailer wheels.
When the wheel blocks are in pl ace, release the brakes slowly
until the blocks absorb the load.
Apply the parking brake firmly.
Shift into P and turn off the hybrid system.
STEP1
STEP2
STEP3
STEP4
STEP5

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5-2. Steps to take in an emergency
If your vehicle overheats
Correction procedures■ If the needle of the engine coolant temperature gauge enters
the red zone
Stop the vehicle in a safe place and turn off the air condition-
ing system.
Check to see if steam is coming out from the engine area.
If you see steam:
Stop the hybrid system. Carefully lift the hood after the
steam subsides and then restart the hybrid system.
If you do not see steam: Leave the hybrid system operating and carefully lift the
hood.
Check if the cooling fans are operating.
If the fans are operating: Wait until the engine coolant temperature gauge begins to
fall and then stop the hybrid system.
If the fans are not operating: Stop the hybrid system immediately and call your Toyota
dealer.
The following may indicate that your vehicle is overheating:
●The needle of the engine coolant temperature gauge enters the
red zone:
The engine may be overheating.
● “Hybrid System Overheat” is shown on the multi-information dis-
play:
The power control unit may be overheating.
Follow the correction procedure as described below.
STEP1
STEP2
STEP3

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When trouble arises
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5-2. Steps to take in an emergency
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Overheating
The following symptoms may occur when your vehicle is overheating:
●Hybrid system output decreases.
● Steam is coming from the engine area.
CAUTION
■To prevent an accident or injury when inspecting under the hood of
your vehicle
●If steam is seen coming from under the hood, do not open the hood until
the steam has subsided. The engine compartment may be very hot, caus-
ing serious injury such as burns.
● With a hybrid vehicle, there are times when the gasoline engine automati-
cally starts to run or the cooling fans suddenly start to operate. Do not
touch or approach the rotating parts of the belt or fans. Doing so may lead
to fingers, clothes or tools getting caught, resulting in an accidental injury.
● Do not loosen the coolant reservoir cap while the hybrid system and radia-
tor are hot.
Serious injury, such as burns, may result from hot coolant and steam
released under pressure.
NOTICE
■When adding engine/power control unit coolant
Wait until the hybrid system has cooled down before adding engine/power
control unit coolant.
When adding coolant, do so slowly. Adding cool coolant to a hot hybrid sys-
tem too quickly can cause damage to the hybrid system.

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Alphabetical index
Doors
Door glasses ........................ 116
Door lock .................... 44, 65, 74
Side mirrors .......................... 114
Driver's seat belt reminder
light ........................................ 505
Driving Break-in tips ......................... 171
Correct posture..................... 134
Procedures ........................... 170
Winter driving tips ................. 238
DVD player ............................... 318
“ECON” switch ........................ 187
Eco Driving Mode .................... 187
Electric power steering........... 222
Electronic key If your electronic key battery is discharged ...................... 528
Emergency flashers Switch ................................... 492
Emergency, in case of
If the back door opener is inoperative ........................... 81
If the electronic key does
not operate properly ........... 528
If the hybrid system will not start .............................. 524
If the shift lever cannot be shifted from P ..................... 526
If the vehicle has a
discharged 12-volt
battery ................................ 530
If the warning buzzer
sounds ............................... 502
If the warning light turns on ....................................... 502
If the warning message is displayed ............................ 511
If you have a flat tire ............ 512
If you lose your keys............. 527
If you think something is
wrong ................................. 499 If your vehicle becomes
stuck ...................................538
If your vehicle needs to be towed ..................................493
If your vehicle overheats .......534
Engine Compartment ........................434
Engine switch ........................180
Hood......................................430
How to start the hybrid system......................180
Identification number .............541
If the hybrid system will not start ...............................524
Ignition switch........................180
Overheating...........................534
Power switch .........................180
Engine compartment cover.....435
Engine/power control unit coolant
Capacity ................................545
Checking ...............................440
Preparing and checking before winter .......................238
Engine coolan t temperature
gauge ......................................191
Engine oil Capacity ................................544
Checking ...............................437
Preparing and checking before winter .......................238
Engine oil maintenance
data .........................................439
Engine switch ...........................180
EPS ............................................222
EV-Drive Mode..........................184
Event data recorder .................500
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584 Alphabetical index
Off-road precautions ............... 228
Odometer .................................. 191
OilEngine oil .............................. 437
Opener
Back door ................................78
Fuel filler door ....................... 121
Glass hatch .............................87
Hood...................................... 430
Outside rear view mirrors Adjusting and folding ............. 114
Outside temperature display .................................... 197
Overhead console .................... 377
Overheating, Hybr id system ... 534
Parking brake ........................... 189
Parking lights Replacing light bulbs ............. 479
Switch.................................... 207
Wattage ................................. 553
Personal/interior lights
Switch.................................... 372
Wattage ................................. 553
Power outlet ............................. 390
Power switch ............................ 180
Power windows ........................ 116 Radiator .................................... 443
Radio ......................................... 284
Rear automatic air
conditioning system ............. 274
Rear manual air
conditioning system ............. 271
Rear seat Adjustment .............................. 92
Folding down second
seatback ............................... 94
Folding down third
seatback ............................... 96
Removing the second center seat ............................ 97
Stowing the second center seat ............................ 97
Rear seat entertainment
system .................................... 311
Rear turn signal lights Replacing light bulbs ............. 479
Wattage................................. 553
Rear view mirror Compass ............................... 409
Rear view monitor system ...... 218
Rear window defogger ............ 277
Rear window wiper .................. 214
Replacing Fuses .................................... 468
Key battery ............................ 465
Light bulbs............................. 479
Tires ...................................... 512
Reporting safety defects for
U.S. owners ............................ 574O
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