2012 TOYOTA CAMRY HV cooling

387
4-3. Do-it-yourself maintenance
4
Maintenance and care
Fuse block on the back of the cover
FuseAmpereCircuit
1 METER-IG2 5 A Gauge and meters
2 FAN 50 A Electric cooling fans
3 H-LP CLN 30 A No circuit
4 ENG W/PMP 30 A Multiport fuel injection system/
sequential multiport fuel injection
system
5 PTC HTR NO.2 50 A PTC heater
6 PTC HTR NO.1 50 A PTC heater
7 HTR 50 A Air conditioning system
8 DC/DC 120 A Hybrid system
9 ABS NO.1 30 A Electronically controlled brake sys-
tem
10 H-LP-MAIN 30 A H-LP LH-LO, H-LP RH-LO, MNL H-
LP LVL, headlight (low beam)
11 ABS MTR NO.2 50 A Electronically controlled brake sys-
tem
12 ABS MTR NO.1 50 A Electronically controlled brake sys-
tem

390 4-3. Do-it-yourself maintenance
■Engine compartment (type B fuse box)
FuseAmpereCircuit
1 PM IGCT 7.5 A Hybrid system, electronic con-
trolled transmission
2 BATT VL SSR 10 A Hybrid system
3 INV 7.5 A Hybrid system
4 DC/DC IGCT 10 A Hybrid system
5 INV W/PMP
RLY 7.5 A Hybrid system
6 BATT FAN 7.5 A Battery cooling fan
7 INV W/PMP 15 A Hybrid system
8 IGCT-MAIN 25 A DC/DC IGCT, INV, BATT VL SSR,
PM IGCT, INV W/PMP RLY, BATT
FA N

391
4-3. Do-it-yourself maintenance
4
Maintenance and care
■
Under the instrument panel
FuseAmpereCircuit
1 ECU-IG1 NO.2 10 A Shift lock control system, seat
heaters, smart key system, tire
pressure warning system, multiplex
communication system, audio sys-
tem, navigation system, moon roof,
auto anti-glare inside rear view mir-
ror, air conditioning system
2 ECU-IG1 NO.1 10 A Electronically controlled brake sys-
tem, electric cooling fans, stop
lights, steering sensor, Vehicle
Proximity Notification System, rear
window defogger, outside rear view
mirror defogger, back-up lights,
audio system, navigation system
3 PANEL 10 A Switch illumination, air condition-
ing system, shift lever light, glove
box light, audio system, navigation
system, personal lights, interior
lights
4 TAIL 15 A Parking lights, side marker lights,
tail lights, license plate lights, fog
lights

5
When trouble arises
465
5-2. Steps to take in an emergency
If your vehicle overheats
Correction procedures■ If the rightmost segment of th e engine coolant temperature
display are flashing
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 fans are operating.
If the fans are operating: Wait until the rightmost segm ent of the engine coolant tem-
perature display stops flashing and returns to normal dis-
play. Then stop the hybrid system.
If the fans are not operating: Stop the hybrid system immediately and call your Toyota
dealer.
The following may indicate that your vehicle is overheating:
●The rightmost segment of the engine coolant temperature dis-
play is flashing:
The engine may be overheating.
● “HYBRID SYSTEM OVERHEAT” is shown on the multi-informa-
tion display:
The electric motor or power control unit may be overheating.
Follow the correction procedure as described below.
STEP1
STEP2
STEP3

466 5-2. Steps to take in an emergency
After the hybrid system has
cooled down sufficiently, check
the engine coolant level and
inspect the radiator core (radia-
tor) for any leaks.
Add engine coolant if necessary.
Water can be used in an emer-
gency if engine coolant is unavail-
able.
( P. 477)
Have the vehicle inspected at the nearest Toyota dealer as soon as
possible.
■ If “HYBRID SYSTEM OVERHEAT” is shown on the multi-infor-
mation 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 the “HYBRID SYSTEM OVERHEAT” message
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.
STEP4
STEP5
STEP1
STEP2
STEP3

5
When trouble arises
467
5-2. Steps to take in an emergency
After the hybrid system has
cooled down, check the power
control unit coolant level and
inspect the cooling system for
leaks.
Add power control unit coolant if
necessary.
Water can be used in an emer-
gency if power control unit cool-
ant is unavailable. (

P. 477)
Have the vehicle inspected at the nearest Toyota dealer as soon as
possible.
STEP4
STEP5
■Overheating
The following symptoms may occur when your vehicle is overheating:
●Hybrid system output decreases.
● Steam comes out from the engine area.
● “HYBRID SYSTEM OVERHEAT” is shown on the multi-information dis-
play.

468 5-2. Steps to take in an emergency
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.
● Check that on the multi-information display and the “READY” indi-
cator are off.
● For vehicle with a hybrid system, there are times when the gasoline
engine automatically starts to run or the cooling fans suddenly start to
operate. Do not touch or approach the rotating parts of the belt or fans.
Doing so may lead to fingers, clothes or tools getting caught, resulting\
in
injury.
● Do not loosen the coolant reservoir cap while the hybrid system and radia-
tor are hot.
Serious injury, such as burns, may result from hot coolant and steam
released under pressure.
NOTICE
■When adding engine/power control unit coolant
Wait until the hybrid system has cooled down before adding engine/power
control unit coolant.
When adding coolant, do so slowly. Adding cool coolant to a hot hybrid sys-
tem too quickly can cause damage to the hybrid system.
■ To prevent damage to the cooling system
Observe the following precautions:
●Avoid contaminating the coolant with foreign matter (such as sand or dust
etc.)
● Do not use commercially available coolant additives.

477
6-1. Specifications
6
Vehicle specifications
Cooling system
Ignition system
Capacity
(Reference)
Gasoline engine
Power control
unit
7.6 qt. (7.2 L, 6.3 Imp. qt.)
3.4 qt. (3.2 L, 2.8 Imp. qt.)
Coolant typeUse either of the following:
• “Toyota Super Long Life Coolant”
• A similar high-quality ethylene glycol-based non-sili- cate, non-amine, non-nitrite, and non-borate coolant
with long-life hybrid organic acid technology
Do not use plain water alone.
Spark plug
Make
Gap DENSO FK16HR-A8
0.031 in. (0.8 mm)
NOTICE
■
Iridium-tipped spark plugs
Use only iridium-tipped spark plugs. Do not adjust the spark plug gap.