2012 TOYOTA HIGHLANDER HYBRID check engine

498 4-3. Do-it-yourself maintenance
Engine compartment (type C)Push the tab in and lift the lid
off.
Under the instrument panel Remove the lid.
Luggage compartment Remove the terminal cover.
After a system failure, see “Fuse layout and amperage rat-
ings” ( P. 501) for details about which fuse to check.
STEP3

5
When trouble arises
535
5-2. Steps to take in an emergency
The tire pressure warning system may be disabled in the following condi-
tions:
(When the condition be
comes normal, the system will work properly.)
●If electronic devices or facilities using similar radio wave frequencies
are nearby.
●If a radio set at similar frequencies is in use in the vehicle.
●If a window tint that affects the radio wave signals is installed.
●If there is a lot of snow or ice on the vehicle, in particular around the
wheels or wheel housings.
●If non-genuine Toyota wheels are used. (Even if you use Toyota
wheels, the tire pressu re warning system may not work properly with
some types of tires.)
●If tire chains are used.
●If the spare tire is in a location subject to poor radio wave signal
reception.
●If a large metallic object which can interfere with signal reception is
put in the luggage room.
■If the tire pressure warning light frequently comes on after blinking
for 1 minute
Vehicles without smart key system
If the tire pressure warning light frequently comes on after blinking for 1
minute when the engine switch is turned to the “ON” position, have it
checked by your Toyota dealer. Vehicles with smart key system
If the tire pressure warning light comes on after blinking for 1 minute fre-
quently when the “POWER” switch is turned to ON mode, have it
checked by your Toyota dealer.

562
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

5
When trouble arises
563
5-2. Steps to take in an emergency
After the hybrid system has
cooled down, check the engine
coolant level and inspect the
cooling system for leaks.
If the engine compartment cover
needs to be removed. (
P. 463)
Engine coolant reservoir
Radiator
If necessary, add engine coolant
up to the “FULL” line.
Water can be used in an emer-
gency if engine coolant is unavail-
able. ( P. 577)
STEP4
STEP5

564 5-2. Steps to take in an emergency
■If “Hybrid System Overheat” is shown on the multi-informa-
tion display
Stop the vehicle in a safe place and turn off the air condition-
ing system.
Leave the hybrid system operating and carefully lift the hood.
Check if the cooling fans are operating.
If the fans are operating: Wait until “Hybrid System Overheat” disappears and then
stop the hybrid system.
If the message does not disapp ear, call your Toyota dealer.
If the fans are not operating: Stop the hybrid system immediately and call your Toyota
dealer.
After the hybrid system has
cooled down, check the power
control unit coolant level and
inspect the cooling system for
leaks.
If the engine compartment cover
needs to be removed. (P. 463)
Power control unit coolant res-
ervoir
Power control unit coolant
radiator
If necessary, add power control
unit coolant up to the “FULL”
line.
Water can be used in an emer-
gency if power control unit cool-
ant is unavailable. ( P. 577)
STEP1
STEP2
STEP3
STEP4
STEP5

575
6-1. Specifications
6
Vehicle specifications
Lubrication system
*: The engine oil capacity is a reference quantity to be used when exchanging. Warm up the engine and turn off the hybrid system, wait
more than 5 minutes, and check the oil level on the dipstick.
■ Engine oil selection
“Toyota Genuine Motor Oil” is used in your Toyota vehicle. Use
Toyota approved “Toyota Genuine Motor Oil” or equivalent to satisfy
the following grade and viscosity.
Oil grade: ILSAC multigrade engine oil
Recommended viscosity: SAE 0W-20
SAE 0W-20 is the best choice for
good fuel economy and good
starting in cold weather.
If SAE 0W-20 is not available,
SAE 5W-20 oil may be used.
However, it must be replaced
with SAE 0W-20 at the next oil
change.
Oil capacity
(Drain and refill 
reference*) Without filter
With filter 6.0 qt. (5.7 L, 5.0 Imp. qt.)
6.4 qt. (6.1 L, 5.4 Imp. qt.)
Outside temperature

625
Alphabetical index
Engine
Compartment........................ 462
Engine switch ............... 179, 184
Hood ..................................... 458
How to start the
hybrid system ..................... 179
Identification number ............ 571
If the hybrid system will not start .............................. 552
Ignition switch ............... 179, 184
Overheating .......................... 562
Power switch ........................ 179
Engine compartment cover .... 463
Engine coolan t temperature
gauge ..................................... 196
Engine oil Capacity ............................... 575
Checking .............................. 464
Preparing and checking before winter ...................... 251
Engine oil maintenance data ........................................ 448
Engine switch .................. 179, 184
Engine/power control unit
coolantCapacity ............................... 577
Checking .............................. 467
Preparing and checking before winter ...................... 251
EPS ........................................... 234
EV-Drive Mode ......................... 188
Event data recorder .................. 26 Floor mat...................................427
Fluid
Brake .....................................471
Washer ..................................472
Fog lights
Replacing light bulbs .............510
Switch....................................219
Wattage .................................583
Front automatic air conditioning system..............284
Front fog lights
Replacing light bulbs .............510
Switch....................................219
Wattage .................................583
Front manual air conditioning system..............278
Front passenger occupant
classification system ............145
Front passenger's seat belt reminder light.........................531
Front seats Adjustment ..............................83
Front side marker lights
Replacing light bulbs .............510
Switch....................................213
Wattage .................................583
Front turn signal lights Replacing light bulbs .............510
Wattage .................................583
Fuel Capacity ................................573
Fuel gauge ............................196
Gas station information .........636
Information ............................584
Refueling ...............................118
Type ......................................573
Fuel door...................................118
Fuel filler door ..........................118
Fuses.........................................497F

630 Alphabetical index
Stop lightsReplacing light bulbs ............. 510
Wattage ................................. 583
Storage feature......................... 404
Storage precautions ................248
Stuck If your vehicle becomes stuck ................................... 566
Sun visors................................. 417
Switch Door lock switch ......................65
“ECON” switch ...................... 191
Emergency flasher switch ..... 520
Engine switch ................ 179, 184
“EV” switch ............................ 188
Fog light switch ..................... 219
Garage door opener switch ... 430
Hazard light switch ................520
Ignition switch................ 179, 184
Light switches........................ 213
Moon roof switch ................... 113
Outside rear view mirror switches .............................. 108
“POWER” switch ................... 179
Power back door main switch ....................................72
Power back door switch ..........70
Power window switch ............ 110
Window lock switch ............... 110
Wiper and washer switch .......................... 221, 224 Tail lights
Replacing light bulbs ............. 510
Switch ................................... 213
Wattage................................. 583
Talk switch ............................... 373
Telephone switch..................... 373
Theft deterrent system Alarm..................................... 126
Immobilizer system ............... 123
Theft prevention labels ........... 130
Tire inflation pressure ............. 485
Tire information Glossary ................................ 593
Size ....................................... 590
Tire identification number...... 589
Uniform tire quality grading................................ 591
Tires Chains ................................... 251
Checking ............................... 477
If you have a flat tire.............. 539
Inflation pressure .................. 485
Information ............................ 587
Replacing .............................. 539
Rotating tires ......................... 477
Size ....................................... 581
Snow tires ............................. 251
Tire pressure warning system ........................ 477, 531T