2012 TOYOTA RAV4 EV heater

348 4-3. Do-it-yourself maintenance
CAUTION
The motor 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 motor compartment
●Make sure that the indicator on the “POWER” switch and the “READY”
indicator are both off.
● Keep hands, clothing and tools away from the moving fans.
● Be careful not to touch the motor, power control unit, radiator, heater, etc.
right after driving as they may be hot. Coolant and other fluids may also be
hot.
● Do not leave anything that may burn easily, such as paper and rags, in the
motor compartment.
● Do not smoke, cause sparks or expose an open flame to the 12-volt bat-
tery. 12-volt battery fumes are flammable.
● Be extremely cautious when working on the 12-volt battery. It contains poi-
sonous and corrosive sulfuric acid.
● 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.
● Never touch, disassemble, remove or replace the high voltage parts,
cables and their connectors. It can cause severe burns or electric shock
that may result in death or serious injury.
■ When working near the electric c ooling fans 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. 360)
■ Safety glasses
Wear safety glasses to prevent flying or falling material, fluid spray, etc. from
getting in the eyes.

355
4-3. Do-it-yourself maintenance
4
Maintenance and care
Motor compartment
Fuse boxes (P. 385)
Motor coolant reservoir ( P. 357)
12-volt battery ( P. 362)
Brake fluid reservoir ( P. 361)
Heater coolant reservoir ( P. 359)Traction battery coolant
reservoir ( P. 357)
Radiators ( P. 360)
Condenser ( P. 360)
Electric cooling fans
Washer fluid tank ( P. 365)

358 4-3. Do-it-yourself maintenance
■Coolant selection
Only use “Zerex G 48” or “Glysantin G 48”.
“Zerex G 48” and “Glysantin G 48” are blue in color.
Reference:
The dilution ratio for both “Zerex G 48” and “Glysantin G 48” is 50% cool-
ant and 50% deionized water. (Minimum temperature: approximately -32 F
[-36 C])
For more details about motor/traction battery coolant, contact your Toyota
dealer.
■ If the coolant level drops within a short time after replenishing
Visually check the radiator, hoses, motor/traction battery coolant reservoir
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.
CAUTION
■When the EV system is hot
Do not remove the coolant reservoir cap.
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, corro-
sion protection and cooling. Be sure to read the antifreeze or coolant label.
● Do not add heater coolant to the motor or traction battery coolant reser-
voirs. Doing so will negatively affect the coolant’s performance and cause
the cooling system to malfunction.
■ If you spill coolant
Be sure to wash it off with water to prevent damage to parts or paint.

359
4-3. Do-it-yourself maintenance
4
Maintenance and care
Heater coolant
The coolant level is sati sfactory if it is between the “F” and “L” lines on
the reservoir when the heater system is cold.
Reservoir cap
“F”
“L”
If the level is on or below the “L”
line, add coolant up to the “F” line.
(P. 485)
■ 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 pink in color.
“Toyota Super Long Life Coolant” is a mixture of 50% coolant and 50%
deionized water. (Minimum temperature: -31 F [-35 C])
For more details about heater coolant, contact your Toyota dealer.
■ If the coolant level drops within a short time after replenishing
Visually check the hoses, heater coolant reservoir 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 heater system.
CAUTION
■When the heater is in use or just after use
Do not remove the coolant reservoir cap.
The heater system may be under pressure and may spray hot coolant if the
cap is removed, causing serious injuries, such as burns.

360 4-3. Do-it-yourself maintenance
Condenser and radiatorsCheck the condenser and radiator s, and clear away any foreign
objects.
If either of the above parts are ex tremely dirty or you are not sure of
their condition, have your vehicl e checked by your Toyota dealer.
NOTICE
■When adding heater coolant
●Coolant is neither plain water nor straight antifreeze. The correct mixture
of water and antifreeze must be used to provide proper lubrication and
corrosion protection. Be sure to read the antifreeze or coolant label.
● Do not add motor or traction battery coolant to the heater coolant reser-
voir. Doing so will negatively affect the coolant’s performance and cause
the heater system to malfunction.
■ If you spill coolant
Be sure to wash it off with water to prevent damage to parts or paint.
CAUTION
■When the EV system is hot
Do not touch the condenser or radiators as they may be hot and cause seri-
ous injuries, such as burns.

393
4-3. Do-it-yourself maintenance
4
Maintenance and care
Ty p e C
FuseAmpereCircuit
1 FL J/B 140 AECU-IG1 2, back-up lights, wind-
shield wipers and washers, rear
window wiper and washer, ECU-
IG1 1, seat heaters, ECU-IG1 3,
power windows, stop lights, OBD,
ACC-MAIN, charging indicator,
DEF, TAIL, power outlets, switch
illumination, instrument panel
lights, gauges and meters, audio
system, air conditioning system

395
4-3. Do-it-yourself maintenance
4
Maintenance and care
Fuse block (under side view)
FuseAmpereCircuit
1 TAIL 10 A Tail lights, license plate light, side
marker lights, daytime running light
system
2 PANEL 7.5 A Switch illuminations
3 BKUP LP 10 A Back-up lights
4 P/W-FL 20 A Power windows
5 P/W-RL 20 A Power windows
6 P/W-RR 20 A Power windows
7 P/OUT 15 A Power outlet
8 ACC-B 7.5 AAudio system, power rear view mir-
ror control, air conditioning sys-
tem, smart key system, main body
ECU
9 MIR HTR 10 A Outside rear view mirror defoggers
10 P/OUT-MAIN 15 A Power outlets 11 A/B-IG2 7.5 A SRS airbag system
12 GAUGE 7.5 A Gauges and meters
13 ECU-IG1 3 10 A EPS-IG1, SSR-IG1
14 S/HTR 15 A Seat heaters
15 WIPER 25 A Windshield wipers
16 WIPER RR 15 A Rear window wiper

485
6-1. Specifications
6
Vehicle specifications
Cooling system
■ Motor coolant/traction battery coolant
■ Heater coolant
*1: The capacity is a reference quantity. If replacement is necessary, contact
your Toyota dealer.
*
2: The dilution ratio for both “Zerex G 48” and “Glysantin G 48” is 50% coolant and 50% deionized water.
Capacity (Reference)*1
Motor coolant
6.1 qt. (5.8 L, 5.1 Imp. qt.)
Traction battery coolant
8.2 qt. (7.8 L, 6.9 Imp. qt.)
Coolant type “Zerex G 48” or “Glysantin G 48” only *2
Capacity (Reference)*11.6 qt. (1.5 L, 1.3 Imp. qt.)
Coolant type Use either of the following:
• “Toyota Super Long Life Coolant”
• A similar high-quality ethylene glycol-based non-silicate, non-amine, non-nitrite,
and non-borate coolant with long-life
hybrid organic acid technology
Do not use plain water alone.