2012 TOYOTA YARIS HYBRID cooling

481 4-3. Do-it-yourself maintenance
4
Maintenance and care
YARIS_F (including HV)_WE_52C79E
Radiator, condenser and intercooler
Check the radiator, condenser and intercooler and clear away any
foreign objects.
If any of the above parts are extremely dirty or you are not sure of
their condition, have your vehicle inspected by any authorized Toyota
dealer or repairer, or another duly qualified and equipped profes-
sional.
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 it from damaging parts or paint.
CAUTION
When the engine is hot (except hybrid vehicle)
Do not touch the radiator, condenser or intercooler as they may be hot and
cause serious injuries, such as burns.
When the hybrid system is hot (hybrid vehicle)
Do not touch the radiator or condenser as they may be hot and cause seri-
ous injuries, such as burns.

520 4-3. Do-it-yourself maintenance
YARIS_F (including HV)_WE_52C79E
5IG2 10 ASmart entry & start system, multi-
port fuel injection system/sequen-
tial multiport fuel injection system,
multi-mode manual transmission,
SRS airbag system, steering lock
system, stop lights, Stop & Start
system
6IGN 15 AMultiport fuel injection system/
sequential multiport fuel injection
system
7MET 7.5 AGauge and meters, Stop & Start
system
8PWR HTR
*225 APower heater, multiport fuel injec-
tion system/sequential multiport
fuel injection system
9 EPS 50 A Electric power steering
10 ABS NO.2 30 A ABS, VSC
11 D E F 3 0 ARear window defogger, ID/UP,
MIR-HTR
12 SPARE 10 A Spare fuse
13 PTC 80 APTC heater, outside rear view mir-
ror defogger
14 HTR 40 A Air conditioning system
15 H-LP CLN 30 A
16 RDI FAN 30 A Electric cooling fan
17 ABS NO.1 50 A ABS, VSC
18 BBC
*340 A Stop & Start system
19 ST 30 A Starting system
20 AMP 30 A Audio system
21 D/L NO.2 25 A
Power door lock
22 D.C.C. 30 A DOME, ECU-B NO.1
FuseAmpereCircuit

525 4-3. Do-it-yourself maintenance
4
Maintenance and care
YARIS_F (including HV)_WE_52C79EUnder the instrument panel
FuseAmpereCircuit
1 TAIL NO.2 10 A
Front position lights, tail lights,
license plate lights, front fog lights,
rear fog light, multiport fuel injection
system/sequential multiport fuel
injection system, gauge and meters
2 PANEL 5 AGauge and meters, instrument
panel lights, switch illumination
3 DOOR R/R 20 A Power windows
4 DOOR P 20 A Power windows
5 ECU-IG NO.1 5 AElectric cooling fan, rear window
defogger, electric power steering,
main body ECU, windshield wipers,
VSC
6 ECU-IG NO.2 5 A ABS, VSC, Stop & Start system
7A/C 7.5 AAir conditioning system, power
heater, rear window defogger, out-
side rear view mirror defoggers
8 GAUGE 10 ABack-up lights, shift lock control
system, rear seat belt reminder
lights, auto anti-glare inside rear
view mirror, multidrive, audio sys-
tem, multiport fuel injection system/
sequential multiport fuel injection
system, rain sensor

529 4-3. Do-it-yourself maintenance
4
Maintenance and care
YARIS_F (including HV)_WE_52C79E
26 ECU-B NO.2 5 AAir conditioning system, gauge and
meters, smart entry & start system,
push-button start system
27 AM2 7.5 A Start system
28 DRL 7.5 A Daytime running lights
29 STRG LOCK 20 A Starter system
30 ABS NO.2 7.5 A Brake system
31 AMP 15 A Audio system
32 IGCT-MAIN 30 AIGCT NO.2, IGCT NO.3, IGCT
NO.4, PCU, BATT FAN
33 D/C CUT 30 A DOME, ECU-B NO.1
34 PTC HTR NO.1 30 A No circuit
35 PTC HTR NO.2 30 A No circuit
36 FAN 30 A Electric cooling fan
37 PTC HTR NO.3 30 A No circuit
38 DEF 25 A MIR HTR, rear window defogger
39 MIR HTR 10 A Outside rear view mirror defogger
40 BATT FAN 10 A Battery cooling fan
41 IGCT NO.2 10 A Hybrid system
42 IGCT NO.4 10 A Hybrid system
43 PCU 10 A Hybrid system
44 IGCT NO.3 10 A Hybrid system
FuseAmpereCircuit

630 5-2. Steps to take in an emergency
YARIS_F (including HV)_WE_52C79E
NOTICE
When handling jumper cables
When connecting the jumper cables, ensure that they do not become entan-
gled in the cooling fan or belt.

5
635
5-2. Steps to take in an emergency
When trouble arises
YARIS_F (including HV)_WE_52C79E
If your vehicle overheats (except hybrid vehicle)
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 sub-
sides 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 any authorized Toyota
dealer or repairer, or another duly qualified and equipped
professional.
After the engine has cooled down sufficiently, check the
engine coolant level and inspect the radiator core (radiator)
for any leaks.
Gasoline engine

5
639
5-2. Steps to take in an emergency
When trouble arises
YARIS_F (including HV)_WE_52C79E
If your vehicle overheats (hybrid vehicle)
Correction procedures
If the high engine coolant temperature warning light comes on
or flashes
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 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 hybrid system.
If the fan is not operating:
Stop the hybrid system immediately and call any authorized
Toyota dealer or repairer, or another duly qualified and
equipped professional.
The following may indicate that your vehicle is overheating:
The high engine coolant temperature warning light comes on or
flashes:
The engine may be overheating.
If the hybrid system overheat warning light comes on:
The power control unit may be overheating.
Follow the correction procedure as described below.

640 5-2. Steps to take in an emergency
YARIS_F (including HV)_WE_52C79EAfter the hybrid system has
cooled down sufficiently, check
the engine coolant level and
inspect the cooling system for
leaks.
Add engine coolant if necessary.
Water can be used in an emer-
gency if engine coolant is unavail-
able. (P. 667)
Have the vehicle inspected at the nearest authorized Toyota dealer or
repairer, or another duly qualified and equipped professional as soon
as possible.
If the hybrid system overheat warning light comes on
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.