2012 TOYOTA AURIS HYBRID cooling

33 1-1. Hybrid system
1
Before driving
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Sounds and vibrations specific to a hybrid vehicle
There may be no engine sounds or vibration even though the vehicle is able
to move. Always push the P position switch and set the parking brake when
parked.
The following sounds or vibrations may occur when the hybrid system is
operating, and are not a malfunction.
Motor sounds may be heard from the engine compartment.
Sounds may be heard from the hybrid battery (traction battery) behind
the rear seat when the hybrid system starts or stops.
Sounds from the hybrid system may be heard when the back door is
open.
Sounds may be heard from the transmission when the gasoline engine
starts or stops, when driving at low speeds, or during idling.
Engine sounds may be heard when accelerating sharply.
Sounds may be heard due to regenerative brake when you press the
brake pedal or release the accelerator pedal.
Other sounds, such as motors and mechanical noises, may be heard
from the brake system when the brake pedal is depressed.
Vibration may be felt when the gasoline engine starts or stops.
You may hear cooling fan sounds coming from the air intake vents behind
the rear seat.
Maintenance, repair, recycling, and disposal
Contact any authorized Toyota dealer or repairer, or another duly qualified
and equipped professional regarding maintenance, repair, recycling and dis-
posal. Do not dispose of the vehicle yourself.

35 1-1. Hybrid system
1
Before driving
UK_AURIS_HV_EEHybrid battery air vent
There is an air intake vent on the
side of the rear right seatback for
the purpose of cooling the hybrid
battery (traction battery). If the
vent becomes blocked, the
hybrid battery may overheat,
leading to a reduction in hybrid
battery output.
Emergency shut off system
The emergency shut off system blocks off the high voltage current
and stops the fuel pump to minimize the risk of electrocution and fuel
leakage when a certain level of impact is detected by the impact sen-
sor. If the emergency shut off system activates, your vehicle will not
restart. To restart the hybrid system, contact any authorized Toyota
dealer or repairer, or another duly qualified and equipped profes-
sional.

367 4-3. Do-it-yourself maintenance
4
Maintenance and care
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CAUTION
The engine compartment contains many mechanisms and fluids that may
move suddenly, become hot, or become electrically energized. To avoid death
or serious injury observe the following precautions:
When working on the engine compartment
Keep hands, clothing, and tools away from the moving fan.
Be careful not to touch the engine, power control unit, radiator, exhaust
manifold, etc. right after driving as they may be hot. Oil and other fluids
may also be hot.
Do not leave anything that may burn easily, such as paper or rags, in the
engine compartment.
Do not smoke, cause sparks or expose an open flame to fuel. Fuel fumes
are flammable.
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 “POWER” switch is off.
With the “POWER” switch in ON mode, the electric cooling fans may auto-
matically start to run if the air conditioning is on and/or the coolant tempera-
ture is high. (P. 379)
Safety glasses
Wear safety glasses to prevent flying or falling material, fluid spray, etc. from
getting in the eyes.

373
4-3. Do-it-yourself maintenance
4
Maintenance and care
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Engine compartment
Engine coolant reservoir
(P. 377)
Engine oil level dipstick
(P. 374)
Engine oil filler cap
(P. 375)
Power control unit coolant
reservoir (P. 377)Fuse box (P. 400)
Radiator (P. 379)
Condenser (P. 379)
Electric cooling fans
Washer fluid tank (P. 379)

378 4-3. Do-it-yourself maintenance
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If the coolant level drops within a short time after replenishing
Visually check the radiator, hoses, coolant reservoir caps, drain cock and
water pump.
If you cannot find a leak, have any authorized Toyota dealer or repairer, or
another duly qualified and equipped professional, 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.
“Toyota Super Long Life Coolant” is a mixture of 50% coolant and 50%
deionized water. (Enabled: -35C [-31F])
For more details about coolant, contact any authorized Toyota dealer or
repairer, or another duly qualified and equipped professional.
CAUTION
When the hybrid system is hot
Do not remove the coolant reservoir caps.
The cooling system may be under pressure and may spray hot coolant if the
cap is removed, causing serious injuries, such as burns.
NOTICE
When adding coolant
Coolant is neither plain water nor straight 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.

404 4-3. Do-it-yourself maintenance
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Fuse layout and amperage ratings
Engine compartment
FuseAmpereCircuit
1 HTR 50 A Air conditioning system
2 RDI 30 A Electric cooling fan
3 CDS 30 A Electric cooling fan
4 DRL 7.5 A Daytime running lights
5 ENG W/P 30 A Cooling system
6ABS MAIN
NO.27.5 A Brake system
7 H-LP CLN 30 A Headlight cleaner
8 IGCT 30 A IGCT NO.2, IGCT NO.3, PCU
9 DC/DC-S 5 A Inverter and converter
10 P CON MAIN 7.5 A P position control system
11 AM2 7.5 A Hybrid system
12 ECU-B2 10 AAir conditioning system, smart
entry & start system, push button
start, power windows

406 4-3. Do-it-yourself maintenance
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31 EFI NO.2 10 AMultiport fuel injection system/
sequential multiport fuel injection
32 IGCT NO.3 10 A Cooling system
33 SPARE 30 A Spare fuse
34 SPARE 10 A Spare fuse
35 SPARE 7.5 A Spare fuse
36 EFI MAIN 20 AMultiport fuel injection system/
sequential multiport fuel injection,
EFI NO.2, cooling system
37 BATT FAN 10 A Hybrid battery cooling fan
38 IG2 15 AMultiport fuel injection system/
sequential multiport fuel injection,
starting system, IGN, MET, hybrid
system
FuseAmpereCircuit

408 4-3. Do-it-yourself maintenance
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10 GAUGE 10 AHorn, left-hand headlight (low
beam), right-hand headlight (low
beam), back-up lights, “touch
screen”, auto anti-glare inside rear
view mirror, Toyota parking assist-
sensor
11 ECU-IG NO.2 10 AAir conditioning system, turn signal
lights, auto anti-glare inside rear
view mirror, rear view monitor sys-
tem, moon roof, Toyota parking
assist-sensor, brake system
12 ECU-IG1 NO.1 10 AMain body ECU, electric cooling
fans, automatic headlight leveling
system, electric power steering,
rain-sensing windshield wipers,
headlight cleaner, vehicle stability
control system
13 DOOR RL 20 A Power windows
14 DOOR RR 20 A Power windows
15 D FR DOOR 20 A Power windows
16 S/ROOF 20 A Moon roof
17 P FR DOOR 20 A Power windows
18 STOP 10 AStop lights, high mounted stop
light, brake system, hybrid system
19 RR FOG 7.5 A Rear fog light
20 OBD 7.5 A On-board diagnosis system
21 FR FOG 15 A Front fog lights
22 DBL LOCK 25 AMultiport fuel injection system/
sequential multiport fuel injection
23 DOOR NO.1 25 A Power door lock
24 SEAT HTR FL 10 A Seat heater
25 SEAT HTR FR 10 A Seat heater
FuseAmpereCircuit