2010 TOYOTA HIGHLANDER HYBRID cooling

473
4-3. Do-it-yourself maintenance
4
Maintenance and care
24 ECU-B
10 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
533
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.

534
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
535
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. 545)
STEP4
STEP5

536 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.
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. 545)
Have the vehicle inspected at your nearest Toyota dealer as soon as
possible.
STEP1
STEP2
STEP3
STEP4
STEP5

5
When trouble arises
537
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.

545
6-1. Specifications
6
Vehicle specifications
How to read oil container label:
The ILSAC (International Lubric
ant Standardization and Approval
Committee) Certification Mark is added to some oil containers to help
you select the oil you should use.
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.

580 Alphabetical index
BrakesFluid ...................................... 443
Parking brake ........................ 189
Brake assist .............................. 222
Break-in tips ............................. 171
Care Exterior .................................. 414
Interior ................................... 417
Seat belts .............................. 418
Cargo capacity ......................... 237
Cargo hooks ............................. 397
CD changer ............................... 290
CD player .................................. 290
Chains ....................................... 238
Child restraint system Booster seats, definition ........ 155
Booster seats, installation ..... 158
Convertible seats, definition ............................. 155
Convertible seats, installation ........................... 158
Front passenger occupant classification system ........... 148
Infant seats, definition ........... 155
Infant seats, installation......... 158
Installing CRS with LATCH anchors ............................... 160
Installing CRS with seat belts .................................... 162
Installing CRS with a top
tether straps ........................ 165
Child safety Airbag precautions ................143
Child restraint system............ 154
Child-protectors .......................75
How your child should wear
the seat belt ........................ 107
Installing child restraints ........ 158
Moon roof precautions .......... 118
Power window lock switch..... 116
Power window precautions ... 117 Removed key battery
precautions ......................... 466
Seat belt extender precautions ......................... 110
Seat belt precautions ............ 109
Seat heater precautions ........ 394
12-volt battery precautions ................. 446, 532
Child-protectors ......................... 75
Cleaning Exterior.................................. 414
Interior ................................... 417
Seat belts .............................. 418
Clock ......................................... 197
Compass................................... 409
Condenser ................................ 443
Console box ............................. 376
Conversation mirror ................ 389
Cooling system Hybrid system overheating ... 534
Cruise control .......................... 215
Cup holders .............................. 378
Curtain shield airbags ............. 136
Customizable features ............ 569
Daytime running light system .................................... 209
Defogger
Rear window ......................... 277
Side mirrors........................... 277
Dimension ................................ 540
Dinghy towing .......................... 252
Display Energy flow ............................. 35
Multi-information display ....... 197
Trip information ..................... 197
Warning message ................. 511
Do-it-yourself maintenance .... 426
Door courtesy lights Door courtesy lights .............. 371
Wattage................................. 553
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D