engine overheat TOYOTA HIGHLANDER 2016 XU50 / 3.G Owners Manual

TABLE OF CONTENTS6
HIGHLANDER_U (OM48F09U)7-1. Maintenance and care
Cleaning and protecting the vehicle exterior .......... 488
Cleaning and protecting the vehicle interior ........... 492
7-2. Maintenance Maintenance requirements ................... 495
General maintenance ........ 498
Emission inspection and maintenance (I/M)
programs ......................... 502
7-3. Do-it-yourself maintenance
Do-it-yourself service precautions ..................... 503
Hood.................................. 505
Positioning a floor jack ...... 507
Engine compartment ......... 508
Tires .................................. 520
Tire inflation pressure........ 531
Wheels .............................. 534
Air conditioning filter .......... 536
Wireless remote control/ electronic key battery ...... 538
Checking and replacing fuses ............................... 541
Light bulbs ......................... 545 8-1. Essential information
Emergency flashers ........... 560
If your vehicle has to be stopped
in an emergency .............. 561
8-2. Steps to take in an emergency
If your vehicle needs to be towed ...................... 563
If you think something is wrong ........................... 567
Fuel pump shut off system ............................. 568
If a warning light turns on or a warning buzzer
sounds ............................. 569
If a warning message is displayed...................... 578
If you have a flat tire .......... 596
If the engine will not start ........................... 621
If the shift lever cannot be shifted from P ............. 623
If the electronic key does not operate properly ....... 624
If the vehicle battery is discharged ................... 627
If your vehicle overheats.... 632
If the vehicle becomes stuck ................................ 635
7Maintenance and care8When trouble arises

15Pictorial index
HIGHLANDER_U (OM48F09U)Fuel filler door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 259
Refueling method. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 259
Fuel type/fuel tank capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 641
Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 520
Tire size/inflation pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 648
Winter tires/tire chain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 326
Checking/rotation/tire pressure warning system . . . . . . . . . . . P. 520
Coping with flat tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 596
Hood . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 505
Opening . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 505
Engine oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 642
Coping with overheat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 632
Warning messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 581
Headlights/daytime running lights . . . . . . . . . . . . . . . . . . . . P. 241
Front fog lights
*. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 252
Turn signal lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 239
Stop/tail lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 241
Hill-start assist control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 301
Downhill assist control system
*. . . . . . . . . . . . . . . . . . . . . . . . P. 307
License plate lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 241
Back-up lights
Shifting the shift lever to R . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 234
Side marker lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 241
6
7
8
Light bulbs of the exterior lights for driving
(Replacing method: P. 545, Watts: P. 651)
*: If equipped
9
10
11
12
13
14
15

942. Instrument cluster
HIGHLANDER_U (OM48F09U)
The brightness of the meter panel lights can be adjusted.
Pressing the button will adjust the
brightness of the meter panel
lights.
The brightness level of the meters
when the surroundings are bright
(day mode) and dark (night mode)
can be adjusted individually. How-
ever, when in day mode, adjusting
the brightness level will also
change the brightness level of
night mode.
■ The meters and display illuminate when
Vehicles without a smart key system
The engine switch is in the “ON” position.
Vehicles with a smart key system
The engine switch is in IGNITION ON mode.
■ Outside temperature display
In the following situations, the correct outside temperature may not be dis-
played, or the display may take longer than normal to change.
●When stopped, or driving at low speeds (less than 12 mph [20 km/h])
● When the outside temperature has changed suddenly (at the entrance/exit
of a garage, tunnel, etc.)
Instrument panel light control
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. 632)

1954-1. Before driving
4
Driving
HIGHLANDER_U (OM48F09U)
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. 234)
● 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.

1974-1. Before driving
4
Driving
HIGHLANDER_U (OM48F09U)
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 race the engine.
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 engine is running, and 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.

1984-1. Before driving
HIGHLANDER_U (OM48F09U)
WARNING
Observe the following precautions.
Failure to do so may result in death or serious injury.
■When the vehicle is parked
●Do not leave glasses, cigarette lighters, spray cans, or soft drink cans in
the vehicle when it is in the sun.
Doing so may result in the following:
• Gas may leak from a cigarette lighter or spray can, and may lead to a
fire.
• The temperature inside the vehicle may cause the plastic lenses and plastic material of glasses to deform or crack.
• Soft drink cans may fracture, causing the contents to spray over the interior of the vehicle, and may also cause a short circuit in the vehicle’s
electrical components.
● Do not leave cigarette lighters in the vehicle. If a cigarette lighter is in a
place such as the glove box or on the floor, it may be lit accidentally when
luggage is loaded or the seat is adjusted, causing a fire.
● Do not attach adhesive discs to the windshield or windows. Do not place
containers such as air fresheners on the instrument panel or dashboard.
Adhesive discs or containers may act as lenses, causing a fire in the vehi-
cle.
● Do not leave a door or window open if the curved glass is coated with a
metallized film such as a silver-colored one. Reflected sunlight may cause
the glass to act as a lens, causing a fire.
● 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.
■ When taking a nap in the vehicle
Always turn the engine off. Otherwise, if you accidentally move the shift
lever or depress the accelerator pedal, this 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, leading to
death or a serious health hazard.

2184-1. Before driving
HIGHLANDER_U (OM48F09U)
●As stopping distance is increased when towing a trailer, vehicle-to
vehicle distance should be increa sed. For each 10 mph (16 km/h)
of speed, allow at least one vehicle and trailer length.
● Avoid sudden braking as you may skid, resulting in the trailer jack-
knifing and a loss of vehicle contro l. This is especially true on wet or
slippery surfaces.
● Avoid jerky starts or sudden acceleration.
● Avoid jerky steering and sharp turns, and slow down before making
turn.
● 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.

2194-1. Before driving
4
Driving
HIGHLANDER_U (OM48F09U)
●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. 632)
● Always place wheel blocks under both the vehicle’s and the trailer’s
wheels when parking. Apply the pa rking 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’s and
trailer’s 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 engine.
● When restarting after parking on a slope:
With the transmission in P, start the engine. Be sure to keep the
brake pedal depressed.
Shift into a forward gear. If reversing, shift into R.
Release the parking brake and brake pedal, and slowly pull or
back away from the wheel blocks. Stop and apply the brakes.
Have someone retrieve the blocks.
1
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3
4
5
1
2
3
4

2274-2. Driving procedures
4
Driving
HIGHLANDER_U (OM48F09U)
NOTICE
■To prevent battery discharge
Do not leave the engine switch in the “ACC” or “ON” position for long peri-
ods of time without the engine running.
■ When starting the engine
●Do not crank the engine for more than 30 seconds at a time. This may
overheat the starter and wiring system.
● Do not race a cold engine.
● If the engine becomes difficult to star t or stalls frequently, have your vehi-
cle checked by your Toyota dealer immediately.

2314-2. Driving procedures
4
Driving
HIGHLANDER_U (OM48F09U)■
Steering lock
After turning the engine switch off and opening and closing the doors, the
steering wheel will be locked due to the steering lock function. Operating the
engine switch again automatically cancels the steering lock.
■ When the steering lock cannot be released
■ Steering lock motor overheating prevention
To prevent the steering lock motor from overheating, operation of the motor
may be suspended if the engine is turned on and off repeatedly in a short
period of time. In this case, refrain from operating the engine switch. \
After
about 10 seconds, the steering lock motor will resume functioning.
■ When “Check SMART Key System” is displayed on the multi-information
display
The system may be malfunctioning. Have the vehicle inspected by your
Toyota dealer immediately.
■ If the electronic key battery is depleted
P. 538
■ Operation of the engine switch
●When operating the engine switch, one short, firm press is enough. If the
switch is pressed improperly, the engine may not start or the engine switch
mode may not change. It is not necessary to press and hold the switch.
● If attempting to restart the engine immediately after turning the engine
switch off, the engine may not start in some cases. After turning the engine
switch off, please wait a few seconds before restarting the engine.
■ If the smart key system has been deactivated in a customized setting
P. 624 “Steering Lock active” will be displayed on
the multi-information display.
Check that the shift lever is set in P. Press
the engine switch while turning the steer-
ing wheel left and right.