2010 TOYOTA SIENNA radiator cap

438
4-3. Do-it-yourself maintenance
Engine compar tment
Power steering fluid reservoir( P. 448)
Windshield and rear window
washer fluid tank ( P. 453)
Engine oil filler cap ( P. 440)
Engine oil level dipstick ( P. 439)Engine coolant reservoir
( P. 444)
Brake fluid reservoir ( P. 446)
Fuse box ( P. 474)
Battery ( P. 450)
Electric cooling fans
Condenser ( P. 446)
Radiator ( P. 446)

444 4-3. Do-it-yourself maintenance
Engine coolantThe coolant level is satisfactory if it is between the “FULL” and “LOW”
lines on the reservoir when the engine is cold.
Reservoir 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, engine coolant reservoir cap, radiator
cap, drain cock and water pump.
If you cannot find a leak, have your Toyota dealer test the cap and check for
leaks in the cooling system.

5
When trouble arises
537
5-2. Steps to take in an emergency
■
Overheating
If you observe the following, your vehicle may be overheating.
●The engine coolant temperature gauge enters the red zone or a loss of
power is experienced.
● Steam is coming from under the hood.
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.
● Keep hands and clothing away from the fan and other belts while the
engine is running.
● Do not loosen the coolant reservoir cap while the engine and radiator are
hot.
Serious injury, such as burns, may result from hot coolant and steam
released under pressure.
Add engine coolant if neces-
sary.
Water can be used in an emer-
gency if engine coolant is
unavailable.
(P. 546)
Have the vehicle chec ked at the nearest Toyota dealer as soon as
possible.
STEP5