Page 522 of 604
5227-2. Steps to take in an emergency
HIGHLANDER_HV_U (OM48F02U)
The coolant level is satisfac-
tory if it is between the
“FULL” and “LOW” lines on
the reservoir.Reservoir
“FULL”
“LOW”
Radiator cap
Add coolant if necessary.
Water can be used in an emer-
gency if coolant is unavailable.
Start the hybrid system and turn the air conditioning system on to
check that the radiator cooling fans operate and to check for
coolant leaks from th e radiator or hoses.
The fans operate when the air conditioning system is turned on immedi-
ately after a cold start. Confirm that the fans are operating by checking
the fan sound and air flow. If it is difficult to check these, turn the air con-
ditioning system on and off repeatedly.
(The fan may not operate in freezing temperatures.)
If the fans are not operating:
Stop the hybrid system immediately and contact your Toyota
dealer.
If the fans are operating:
Have the vehicle inspected at the nearest Toyota dealer.
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Page 523 of 604
5237-2. Steps to take in an emergency
7
When trouble arises
HIGHLANDER_HV_U (OM48F02U)■
If “Hybrid System Overheat” is shown on the multi-information
display
Stop the vehicle in a safe place.
Stop the hybrid system and carefully lift the hood.
After the hybrid system has
cooled down, inspect the
hoses and radiator core
(radiator) for any leaks.Radiator
Cooling fans
If a large amount of coolant
leaks, immediately contact
your Toyota dealer.
The coolant level is satisfac-
tory if it is between the
“FULL” and “LOW” lines on
the reservoir.Reservoir
“FULL”
“LOW”
Add coolant if necessary.
Water can be used in an emer-
gency if coolant is unavailable.
Start the hybrid system and check the multi-information display.
If the message does not disappear:
Stop the hybrid system and contact your Toyota dealer.
If the message is not displayed:
Have the vehicle in spected at the nearest Toyota dealer.
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Page 524 of 604

5247-2. Steps to take in an emergency
HIGHLANDER_HV_U (OM48F02U)
■Messages displays
The message illustrations used are intended as examples, and may differ
from the image that is actually displayed on the multi-information display.
WARNING
■When inspecting under the hood of your vehicle
Observe the following precautions.
Failure to do so may result in serious injury such as burns.
● 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.
● After the hybrid system has been turned off, check that the “READY” indi-
cator are off.
When the hybrid system is operating, the gasoline engine may automati-
cally start, or the cooling fan may suddenly operate even if the gasoline
engine stops. Do not touch or approach rotating parts such as the fan,
which may lead to fingers or clothing (especially a tie, a scarf or a muffler)
getting caught, resulting in serious injury.
● Do not loosen the radiator cap and the coolant reservoir caps while the
hybrid system and radiator are hot.
High temperature steam or coolant could spray out.
NOTICE
■When adding engine/power control unit coolant
Add coolant slowly after the hybrid system has cooled down sufficiently.
Adding cool coolant to a hot hybrid system too quickly can cause damage to
the hybrid system.
■ To prevent damage to the cooling system
Observe the following precautions:
● Avoid contaminating the coolant with foreign matter (such as sand or dust
etc.).
● Do not use any coolant additive.
Page 525 of 604

5257-2. Steps to take in an emergency
7
When trouble arises
HIGHLANDER_HV_U (OM48F02U)
Stop the hybrid system. Set the parking brake and shift the shift
lever to P.
Remove the mud, snow or sand from around the front wheels.
Place wood, stones or some other material under the front wheels
to help provide traction.
Restart the hybrid system.
Shift the shift lever to D or R and release the parking brake. Then,
while exercising caution, depress the accelerator pedal.
■ When it is difficult to free the vehicle
If the vehicle becomes stuck
Carry out the following procedures if the tires spin or the vehicle
becomes stuck in mud, dirt or snow:
Press to turn off TRAC.
WARNING
■When attempting to free a stuck vehicle
If you choose to push the vehicle back and forth to free it, make sure the
surrounding area is clear to avoid striking other vehicles, objects or people.
The vehicle may also lunge forward or lunge back suddenly as it becomes
free. Use extreme caution.
■ When shifting the shift lever
Be careful not to shift the shift lever with the accelerator pedal depressed.
This may lead to unexpected rapid acceleration of the vehicle that may
cause an accident resulting in death or serious injury.
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Page 585 of 604
585What to do if... (Troubleshooting)
HIGHLANDER_HV_U (OM48F02U)
●Did you press the power switch while firmly depressing the brake pedal?
(P. 229)
●Is the shift lever in P? ( P. 232)
●Is the electronic key anywhere detectable inside the vehicle?
(P. 149)
●Is the steering wheel unlocked? ( P. 232)
●Is the electronic key battery weak or depleted?
In this case, the hybrid system can be started in a temporary way.
(P. 514)
●Is the 12-volt battery discharged? ( P. 516)
●Is the power switch in ON mode?
If you cannot release the shift lever by depressing the brake pedal with the
power switch in ON mode ( P. 512)
●It is locked automatically to prevent theft of the vehicle. ( P. 232)
If you think something is wrong
The hybrid system does not start
The shift lever cannot be shifted from P even if you depress
the brake pedal
The steering wheel cannot be tu rned after the hybrid system
is stopped
Page 587 of 604
587What to do if... (Troubleshooting)
HIGHLANDER_HV_U (OM48F02U)
●Did anyone inside the vehicle open a door during setting the alarm?
The sensor detects them and the alarm sounds. (P. 93)
To stop the alarm, turn the power switch to ON mode or start the hybrid
system.
●Is the electronic key left inside the vehicle or the moon roof or panoramic
moon roof open?
Check the message on the multi-information display. ( P. 466)
●When a warning light turns on or a warning message or indicator is dis-
played, refer to P. 457, 466.
An alarm is activated and the horn sounds
(vehicles with an alarm)
A warning buzzer sounds when leaving the vehicle
A warning light turns on or a warning message or indicator
is displayed
Page 593 of 604

593Alphabetical index
HIGHLANDER_HV_U (OM48F02U)
If the shift lever cannot be shifted from P .... 512
If you have a flat tire ............. 486
If you think something is wrong.................................. 456
If your vehicle becomes stuck ................................... 525
If your vehicle has to be
stopped in an emergency ... 451
If your vehicle needs to be towed .................................. 452
If your vehicle overheats ....... 521
Energy monitor ........................ 117
Engine....................................... 530 ACCESSORY mode ............. 230
Compartment ........................ 399
Hood ..................................... 396
How to start the hybrid system ......... ....................... 229
Identification number ............ 530
If the hybrid system
will not start ........................ 510
Ignition switch
(power switch) .................... 229
Overheating .......................... 521
Power switch......................... 229
Engine coolant ......................... 403
Capacity ................................ 534
Checking ............................... 403
Preparing and checking before winter....................... 316
Engine coolant temperature gauge...................................... 103 Engine oil ................................. 400
Capacity................................ 532
Checking............................... 400
Oil pressure warning light ..... 457
Oil pressure warning
message............................. 474
Preparing and checking before winter ...................... 316
Engine switch .......................... 229
Enhanced VSC ......................... 291
EPS (Electric Power Steering) ..... 292 Function ................................ 292
Warning light......................... 458
EV drive mode ......................... 235
Event data recorder (EDR)........ 11
Flat tire ..................................... 486
Floor mats .................................. 28
Fluid Brake .................................... 535
Hybrid transmission .............. 535
Washer ................................. 406
Fog lights ................................. 254 Replacing light bulbs ............ 434
Switch ................................... 254
Wattage ................................ 539
Front automatic air conditioning system ............. 326
Front door courtesy lights Location ................................ 339
Wattage ................................ 539
Front fog lights ........................ 254 Replacing light bulbs ............ 434
Switch ................................... 254
Wattage ................................ 539
Front passenger occupant classification system .............. 54
F