2009 TOYOTA YARIS cooling

178
3-1. Using the air conditioning system and defogger
Air conditioning system
Adjusting the settings■ Adjusting the temperature setting
Turn the temperature control dial clockwise (warm) or counter-
clockwise (cool).
If is not pressed, the system will blow ambient temperature air or
heated air.
For quick cooling, turn the temperature control dial to the “
MAX A/C”
position and set the air intake selection dial to (recirculated air)
mode.
Fan speed control dial
Air outlet selection dialAir conditioning
ON/OFF switch
Temperature control dial
Air intake selection dial

241
4-3. Do-it-yourself maintenance
4
Maintenance and care
CAUTION
■
When working on the engine compartment
●Take care because brake fluid can harm your hands or eyes and damage
painted surfaces.
If fluid gets on your hands or in your eyes, flush the affected area with
clean water immediately.
If you still experience discomfort, see a doctor.
■ When working near the electric cooling fan or radiator grille
Be sure the engine switch is off.
With the engine switch on, the electric cooling fan may automatically start to
run if the air conditioning is on and/or the coolant temperature is high.
■ Safety glasses
Wear safety glasses to prevent flying or falling material, fluid spray, etc. from
getting in the eyes.
NOTICE
■If you remove the air cleaner
Driving with the air cleaner removed may cause excessive engine wear due
to dirt in the air. Also a backfire could cause a fire in the engine compart-
ment.
■ If the brake fluid level is low or high
It is normal for the brake fluid level to go down slightly as the brake pads
wear or when the fluid level in the accumulator is high.
If the reservoir needs frequent refilling, it may indicate a serious pro\
blem.

245
4-3. Do-it-yourself maintenance
4
Maintenance and care
Engine compar tment
Washer fluid tank (P. 256)
Engine oil filler cap ( P. 246)
Engine oil level dipstick ( P. 246)
Radiator cap
Battery ( P. 253)
Brake fluid reservoir ( P. 252)Fuse box ( P. 275)
Condenser ( P. 252)
Electric cooling fan
Engine coolant reservoir ( P. 250)
Radiator ( P. 252)

251
4-3. Do-it-yourself maintenance
4
Maintenance and care
■
If the coolant level drops within a short time after replenishing
Visually check the radiator, hoses, reservoir cap, radiator cap, drain cock
and water pump.
If you cannot find a leak, have your Toyota dealer pressure test the cap 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.
Except Canada:“Toyota Super Long Life Coolant” is a mixture of 50% cool- ant 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 engine coolant, contact your Toyota dealer.
CAUTION
■ When the engine is hot
Do not remove the radiator cap.
The cooling system may be under pressure and may spray hot coolant if the
cap is removed, causing burns or other injuries.
NOTICE
■When adding engine coolant
Coolant is neither plain water nor stra ight antifreeze. The correct mixture of
water and antifreeze must be used to provide proper lubrication, corrosion
protection and cooling. Be sure to read the antifreeze or coolant label.
■ If you spill coolant
Be sure to wash it off with water to prevent damage to parts or paint.

281
4-3. Do-it-yourself maintenance
4
Maintenance and care
13 ECU-B
7.5 AEngine immobilizer system, day-
time running light system, front
passenger occupant classification
system, power windows, door lock
system, theft deterrent system,
meter and gauge
14 ALT-S 7.5 A Charging system
15 ETCS 10 AMultiport fuel injection system/
sequential multiport fuel injection
system, electronic throttle control
system
16 HAZ 10 ATurn signal lights, emergency
flashers
17 H-LP RH/H-LP
LO RH 10 A Right-hand headlight
18 H-LP LH/H-LP
LO LH 10 A Left-hand headlight
19 EFI2 10 AMultiport fuel injection system/
sequential multiport fuel injection
system
20 HTR SUB2 40 A Air conditioning system
21 EPS 50 A Electric power steering system
22 ABS1/VSC1 50 A Anti-lock brake system
23 HTR 40 A Air conditioning system
24 RDI 30 A Electric cooling fan
25 HTR SUB1 30 A Air conditioning system
26 H-LP CLN/PWR
HTR 30 A No circuit
27 AMT 50 A No circuit
FuseAmpereCircuit

284 4-3. Do-it-yourself maintenance
9 ID/UP/MIR HTR 10 AMultiport fuel injection system/
sequential multiport fuel injection
system, outside rear view mirror
control, outside rear view mirror
heaters
10 IGN 7.5 A Multiport fuel injection system/
sequential multiport fuel injection
system, engine immobilizer sys-
tem, SRS airbag system, front pas-
senger occupant classification
system
11 MET 7.5 A Meter and gauge
12 WIP 25 A Windshield wiper
13 RR WIP 15 A Rear wiper
14 WSH 15 A Windshield washer
15 ECU-IG 10 A Daytime running light system, anti-
lock brake system, electric power
steering system, power windows,
door lock system, theft deterrent
system, electric cooling fan
16 GAUGE 10 A Charging system, turn signal lights,
emergency flashers, buck-up
lights, instrument panel light con-
trol, shift lock system, rear window
defogger, air conditioning system,
automatic transmission system
17 OBD2 7.5 A On-board diagnosis system
18 STOP 10 A Stop lights, high mounted stop-
light, multiport fuel injection sys-
tem/sequential multiport fuel
injection system, shift lock system,
anti-lock brake system
19 D/L 25 A Door lock system
20 FR FOG 15 A Front fog lights
FuseAmpereCircuit

336 5-2. Steps to take in an emergency
CAUTION
■Battery precautions
The battery contains poisonous and corrosive acidic electrolyte, while
related parts contain lead and lead compounds. Observe the following pre-
cautions when handling the battery.
●When working with the battery, always wear safety glasses and take care
not to allow any battery fluids (acid) to come into contact with skin, clothing
or the vehicle body.
● Do not lean over the battery.
● In the event that battery fluid comes into contact with the skin or eyes,
immediately wash the affected area with water and seek medical attention.
Place a wet sponge or cloth over the affected area until medical attention
can be received.
● Always wash your hands after handling the battery support, terminals, and
other battery-related parts.
● Do not allow children near the battery.
NOTICE
■To prevent damaging the vehicle ( vehicles with a manual transmission)
Do not pull- or push-start the vehicle, because the three-way catalytic con-
verter may overheat and become a fire hazard.
■ When handling jumper cables
Be careful that the jumper cables do not become tangled in the cooling fan
or any of the belts when connecting or disconnecting them.

5
When trouble arises
337
5-2. Steps to take in an emergency
If your vehicle overheats
If your engine overheats:
Stop the vehicle in a safe place and turn off the air condi-
tioning system.
Check to see if steam is coming out from under the hood.
If you see steam: Stop the engine. Carefully lift the hood after the steam
subsides and then restart the engine.
If you do not see steam: Leave the engine running and carefully lift the hood.
Check to see if the cooling fan is operating.
If the fan is operating: Wait until the high engine coolant temperature warning
light goes off and then stop the engine.
If the fan is not operating: Stop the engine immediately and call your local Toyota
dealer.