2009 TOYOTA HIGHLANDER HYBRID cooling

472 4-3. Do-it-yourself maintenance
24 ECU-B10 ASteering sensor, gauges and
meters, air conditioning system,
main body ECU, wireless remote
control, smart key system, power
back door, on-board diagnosis sys-
tem
25 DOME 10 AVanity lights, personal lights, inte-
rior light, gauges and meters, door
courtesy lights, power back door
26 AMP 15 A Audio system
27 TOWING 30 A Trailer lights
28 IG2 25 A INJ NO.1, INJ NO.2
29 STR LOCK 20 A Steering lock system
30 IGCT 30 AIGCT No.2, IGCT No.3, INV-W/P,
EFI NO.3
31 HAZ 15 A Turn signal lights
32 ABS NO.3 15 AElectronically controlled brake sys-
tem
33 ABS NO.2 10 AElectronically controlled brake sys-
tem
34 ABS NO.1 10 A Capacitor
35 OIL PMP 10 A Transaxle fluid cooling system
36 BATT FAN 15 A Hybrid system
37 G/H 10 AGlass hatch, multiplex communica-
tion system
38 DC/DC-S 10 A Hybrid system
39 AM2 7.5 A Multiplex communication system
40 H-LP LH 15 A Left-hand headlight (high beam)
41 H-LP RH 15 A Right-hand headlight (high beam)
42 H-LP LL 15 A Left-hand headlight (low beam)
FuseAmpereCircuit

5
When trouble arises
531
5-2. Steps to take in an emergency
NOTICE
■
When handling jumper cables
Be careful that the jumper cables do not become tangled in the cooling fans
or belt when connecting or disconnecting the cables.

532
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 plac e 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
533
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.
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. 543)
STEP4
STEP5

534 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 plac e 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.
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. 543)
Have the vehicle inspec ted at your nearest Toyota dealer as soon as
possible.
STEP1
STEP2
STEP3
STEP4
STEP5

5
When trouble arises
535
5-2. Steps to take in an emergency
■
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.

543
6-1. Specifications
6
Vehicle specifications
Cooling system
Capacity (Reference)
Gasoline engine
Power control unit Without rear air conditioning system
11.2 qt. (10.6 L, 9.3 Imp.qt.)
With rear air conditioning system
13.5 qt. (12.8 L, 11.3 Imp.qt.)
3.6 qt. (3.4 L, 3.0 Imp.qt.)
Coolant type Use either of the following.
• “Toyota Super Long Life Coolant”
• Similar high-quality ethylene glycol-based non-silicate, non-amine, non-nitrite, and
non-borate coolant with long-life hybrid
organic acid technology
Do not use plain water alone.

579
Alphabetical index
Child safety
Airbag precautions ............... 140
Child restraint system ........... 151
Child-protectors ...................... 75
How your child should wear
the seat belt ....................... 104
Installing child restraints ....... 155
Moon roof precautions.......... 115
Power window lock switch .... 113
Power window precautions... 114
Removed key battery precautions ........................ 465
Seat belt extender precautions ........................ 107
Seat belt precautions............ 106
Seat heater precautions ....... 393
12-volt battery precautions ................ 445, 530
Child-protectors ........................ 75
Cleaning Exterior ................................. 412
Interior .................................. 415
Seat belts ............................. 416
Clock ........................................ 195
Compass .................................. 407
Condenser ............................... 442
Console box............................. 374
Conversation mirror................ 388
Cooling system Hybrid system overheating ... 532
Cruise control .......................... 213
Cup holders ............................. 376
Curtain shield airbags ............ 133
Customizable features ............ 567 Daytime running light
system ....................................207
Defogger Rear window .........................275
Side mirrors ...........................275
Dimension.................................538
Dinghy towing ..........................250
Display Energy flow .............................35
Multi-information display .......195
Trip information .....................195
Warning message .................509
Do-it-yourself main tenance.....424
Door courtesy lights
Door courtesy lights ..............369
Wattage .................................551
Doors
Door glasses .........................113
Door lock .....................44, 65, 74
Side mirrors ...........................111
Driver's seat belt reminder light .........................................503
Driving
Break-in tips ..........................169
Correct posture .....................131
Procedures ............................168
Winter driving tips..................236
DVD player ................................316D