2013 TOYOTA HIGHLANDER HYBRID radiator

506 4-3. Do-it-yourself maintenance
Power control unit coolant reservoirReservoir cap
“FULL”
“LOW”
If the level is on or below the
“LOW” line, add coolant up to the
“FULL” line.
■If the coolant level drops within a short time after replenishing
Visually check the radiator, hoses, coolant reservoir cap, drain cock and
water pump.
If you cannot find a leak, have your Toyota dealer test the cap opening pres-
sure and check for leaks in the cooling system.
■ Coolant selection
Only use “Toyota Super Long Life Coolant” or similar high quality ethylene
glycol based non-silicate, non-amine, non-nitrite, and non-borate coolant
with long-life hybrid organic acid technology.
U.S.A.: Toyota Super Long Life Coolant is a mixture of 50% coolant and 50% deionized water. (Enabled: -31 F [-35 C])
Canada: Toyota Super Long Life Coolant is a mixture of 55% coolant and 45% deionized water. (Enabled: -44 F [-42 C])
For more details about coolant, contact your Toyota dealer.

508 4-3. Do-it-yourself maintenance
Radiator and condenserCheck the radiators and condens er, and clear away any foreign
objects.
If either of the above parts are ex tremely dirty or you are not sure of
their condition, have your vehicl e checked by your Toyota dealer.
CAUTION
■When the hybrid system is hot
Do not touch the radiators or condenser as they may be hot and cause seri-
ous injuries, such as burns.
■ When the electric cooling fan is operating
Do not touch the engine compartment.
Vehicles without smart key system: The electric cooling fans may keep rotat-
ing for about 3 minutes after the engine switch is turned to the “LOCK” posi-
tion.
With the engine switch in the “ON” position, the electric cooling fans may
automatically start to run if the air conditioning is on and/or the coolant tem-
perature is high. Be sure the engine switch is in the “LOCK” position when
working near the electric cooling fan or radiator grille.
Vehicles with smart key system: The electric cooling fan may keep rotating
for about 3 minutes after the “POWER” switch is OFF.
With the “POWER” switch in ON mode, the electric cooling fan may automat-
ically start to run if the air conditioning is on and/or the coolant temperature
is high. Be sure the “POWER” switch is OFF when working near the electric
cooling fan or radiator grille.

5
When trouble arises
603
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. 501)
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. 617)
STEP4
STEP5

604 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. 501)
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. 617)
STEP1
STEP2
STEP3
STEP4
STEP5

668 Alphabetical index
Odometer .................................. 200
Off-road precautions ............... 246
OilEngine oil .............................. 502
Opener
Back door ................................72
Fuel filler door ....................... 120
Glass hatch .............................81
Hood...................................... 496
Outside rear view mirrors Adjusting and folding ............. 110
Outside temperature display .................................... 207
Overhead console .................... 445
Overheating, Hybr id system ... 602
Parking brake ........................... 198
Parking lights Replacing light bulbs ............. 548
Switch.................................... 218
Wattage ................................. 623
Personal/interior lights
Switch.................................... 440
Wattage ................................. 623
Power outlet ............................. 458
Power switch ............................ 183
Power windows ........................ 112 Radiator .................................... 508
Radio ......................................... 316
Rear automatic air
conditioning system ............. 300
Rear manual air
conditioning system ............. 297
Rear seat Adjustment .............................. 88
Folding down second
seatback ............................... 89
Folding down third
seatback ............................... 91
Removing the second center seat ............................ 92
Stowing the second center seat ............................ 92
Rear seat entertainment
system .................................... 409
Rear turn signal lights Replacing light bulbs ............. 548
Wattage................................. 623
Rear view mirror Compass ............................... 475
Rear view monitor system ...... 235
Rear window defogger ............ 304
Rear window wiper .................. 229
Replacing Fuses .................................... 535
Key battery ............................ 532
Light bulbs............................. 548
Tires ...................................... 579
Reporting safety defects for
U.S. owners ............................ 646
Reset the maintenance data ......................................... 486O
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