2016 TOYOTA HIGHLANDER HYBRID engine overheat

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HIGHLANDER_HV_U (OM48F12U)
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6-1. Maintenance and careCleaning and protecting the vehicle exterior ................ 382
Cleaning and protecting the vehicle interior ................. 386
6-2. Maintenance Maintenance requirements ................... 389
General maintenance ........ 392
Emission inspection and maintenance (I/M)
programs ......................... 396
6-3. Do-it-yourself maintenance
Do-it-yourself service precautions ..................... 397
Hood.................................. 399
Positioning a floor jack ...... 401
Engine compartment ......... 402
12-volt battery ................... 410
Tires .................................. 415
Tire inflation pressure........ 425
Wheels .............................. 428
Air conditioning filter .......... 430
Electronic key battery ........ 432
Checking and replacing fuses ............................... 434
Light bulbs ......................... 438 7-1. Essential information
Emergency flashers ........... 454
If your vehicle has to be stopped in an
emergency....................... 455
7-2. Steps to take in an emergency
If your vehicle needs to be towed ...................... 456
If you think something is wrong ........................... 460
If a warning light turns on or a warning buzzer
sounds ............................. 461
If a warning message is displayed ......................... 470
If you have a flat tire .......... 490
If the hybrid system will not start ........................... 514
If the shift lever cannot be shifted from P ............... 516
If the electronic key does not operate properly ........ 517
If the 12-volt battery is discharged ....................... 520
If your vehicle overheats.... 525
If the vehicle becomes stuck ................................ 529
6Maintenance and care7When trouble arises

17Pictorial index
HIGHLANDER_HV_U (OM48F12U)Fuel filler door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 261
Refueling method. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 261
Fuel type/fuel tank capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 535
Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 415
Tire size/inflation pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 540
Winter tires/tire chain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 319
Checking/rotation/tire pressure warning system . . . . . . . . . . . P. 415
Coping with flat tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 490
Hood . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 399
Opening . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 399
Engine oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 536
Coping with overheat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 525
Warning messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 473
Headlights/daytime running lights . . . . . . . . . . . . . . . . . . . . P. 244
Front fog lights. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 254
Turn signal lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 242
Stop/tail lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 244
Hill-start assist control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 295
License plate lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 244
Back-up lights
Shifting the shift lever to R . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 237
Side marker lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 244
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Light bulbs of the exterior lights for driving

(Replacing method: P. 438, Watts: P. 543)
*: If equipped
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1062. Instrument cluster
HIGHLANDER_HV_U (OM48F12U)
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 engine coolant 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. 525)

1994-1. Before driving
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Driving
HIGHLANDER_HV_U (OM48F12U)
WARNING
Observe the following precautions.
Failure to do so may result in death or serious injury.
■When driving the vehicle
●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. 237)
● Do not adjust the positions 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.
● Always check that all passengers’ arms, heads or other parts of their body
are not outside the vehicle.
● 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 y our 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.
● Sudden acceleration, engine braking due to shifting, or changes in engine
speed could cause the vehicle to skid.
● After driving through a puddle, lightly depress the brake pedal to make
sure that the brakes are functioning properly. Wet brake pads may prevent
the brakes from functioning properly. If the brakes on only one side are wet
and not functioning properly, steering control may be affected.

2014-1. Before driving
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Driving
HIGHLANDER_HV_U (OM48F12U)
WARNING
Observe the following precautions.
Failure to do so may result in death or serious injury.
■If you hear a squealing or scraping noise (brake pad wear limit indica-
tors)
Have the brake pads checked and replaced by your Toyota dealer as soon
as possible.
Rotor damage may result if the pads are not replaced when needed.
It is dangerous to drive the vehicle when the wear limits of the brake pads
and/or those of the brake discs are exceeded.
■ When the vehicle is stopped
●Do not depress the accelerator pedal unnecessarily.
If the vehicle is in any gear other than P or N, the vehicle may accelerate
suddenly and unexpectedly, causing an accident.
● In order to prevent accidents due to the vehicle rolling away, always keep
depressing the brake pedal while the “READY” indicator is on. Apply the
parking brake as necessary.
● If the vehicle is stopped on an incline, in order to prevent accidents caused
by the vehicle rolling forward or backward, always depress the brake pedal
and securely apply the parking brake as needed.
● Avoid revving or racing the engine.
Running the engine at high speed while the vehicle is stopped may cause
the exhaust system to overheat, which could result in a fire if combusti\
ble
material is nearby.

2224-1. Before driving
HIGHLANDER_HV_U (OM48F12U)
●Note that when making a turn, the trailer wheels will be closer than
the vehicle wheels to the inside of the turn. Compensate by making
a wider than normal turning radius.
● Slow down before making a turn, in cross winds, on wet or slippery
surfaces, etc.
Increasing vehicle speed can destabilize the trailer.
● 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.
● To maintain engine braking effici ency and charging system perfor-
mance when using engine braking, do not put the transmission in
D. If in the S mode, the transmission shift range position must be in
4 or lower.
● Instability happens more frequently when descending steep or long
downhill grades. Before descending, slow down and downshift. Do
not make sudden downshifts while descending steep or long down-
hill grades.
● Avoid holding the brake pedal down too long or applying the brakes
too frequently. This could cause th e brakes to overheat and result in
reduced braking efficiency.
● Due to the added load of the trailer, your vehicle’s engine may over-
heat on hot days (at temperatures over 85 F [30C]) when driving
up a long or steep grade. If t he engine coolant temperature gauge
indicates overheating, immediately turn off the air conditioning (if in
use), pull your vehicle off the road and stop in a safe spot.
(  P. 525)

5257-2. Steps to take in an emergency
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When trouble arises
HIGHLANDER_HV_U (OM48F12U)
●The needle of the engine coolant temperature gauge ( P. 103)
enters the red zone or a loss of hybrid system power is experi-
enced. (For example, the vehicle speed does not increase.)
● “Hybrid System Overh eat” is shown on the multi-information dis-
play.
● Steam comes out from under the hood.
■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 conditioning
system, and then stop the hybrid system.
If you see steam:
Carefully lift the hood after the steam subsides.
If you do not see steam:
Carefully lift the hood.
After the hybrid system has
cooled down sufficiently,
inspect the hoses and radia-
tor core (radiator) for any
leaks.Radiator
Cooling fans
If a large amount of coolant
leaks, immediately contact
your Toyota dealer.
If your vehicle overheats
The following may indicate that your vehicle is overheating.
Correction procedures
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597Alphabetical index
HIGHLANDER_HV_U (OM48F12U)
If the shift lever cannot be shifted from P .... 516
If you have a flat tire ............. 490
If you think something is wrong.................................. 460
If your vehicle becomes stuck ................................... 529
If your vehicle has to be
stopped in an emergency ... 455
If your vehicle needs to be towed .................................. 456
If your vehicle overheats ....... 525
Energy monitor ........................ 117
Engine....................................... 534 ACCESSORY mode ............. 230
Compartment ........................ 402
Hood ..................................... 399
How to start the hybrid system ......... ....................... 229
Identification number ............ 534
If the hybrid system
will not start ........................ 514
Ignition switch
(power switch) .................... 229
Overheating .......................... 525
Power switch......................... 229
Engine coolant ......................... 406
Capacity ................................ 538
Checking ............................... 406
Preparing and checking before winter....................... 319
Engine coolant temperature gauge...................................... 103 Engine oil ................................. 403
Capacity................................ 536
Checking............................... 403
Oil pressure warning light ..... 461
Oil pressure warning
message............................. 478
Preparing and checking before winter ...................... 319
Engine switch .......................... 229
Enhanced VSC ......................... 294
EPS (Electric Power Steering) ..... 295Function ................................ 295
Warning light......................... 462
EV drive mode ......................... 235
Event data recorder (EDR)........ 11
Flat tire ..................................... 490
Floor mats .................................. 28
Fluid Brake .................................... 539
Hybrid transmission .............. 539
Washer ................................. 409
Fog lights ................................. 254 Replacing light bulbs ............ 438
Switch ................................... 254
Wattage ................................ 543
Front automatic air conditioning system ............. 328
Front door courtesy lights Location ................................ 341
Wattage ................................ 543
Front fog lights ........................ 254 Replacing light bulbs ............ 438
Switch ................................... 254
Wattage ................................ 543
Front passenger occupant classification system .............. 54
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