
497
7 
7-3. Do-it-yourself maintenance
Maintenance and care
WARNING
■When working on the engine  compartment
●Make sure that “IGNITION ON” on the multi-information display and the “READY” indicator are both off.
●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 flu-ids may also be hot.
●Do not leave anything that may burn easily, such as paper and  
rags, in the engine compartment.
●Do not smoke, cause sparks or 
expose an open flame to fuel or the  12-volt battery. Fuel and 12-volt battery fumes are flammable.
●Take care because brake fluid can harm your hands or eyes and dam- 
age 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, consult 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, the  electric cooling fan may automatically start to run if the air conditioning is on  
and/or the coolant temperature is  high. ( P.504)
■Safety glasses 
Wear safety glasses to prevent flying  or falling material, fluid spray, etc.,  
from getting in your eyes.
NOTICE
■If you remove the air cleaner fil- ter 
Driving with the air cleaner filter  removed may cause excessive engine wear due to dirt in the air.
■If the 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 refill- ing, it may indicate a serious problem. 

501
7 7-3. Do-it-yourself maintenance
Maintenance and care
Fuse boxes (P.545)
Engine oil filler cap (P.502)
Engine oil level dipstick (P.501)
Radiator (P.504)
Electric cooling fan
Condenser (P.504)
Power control unit coolant reservoir (P.504)
Washer fluid tank (P.505)
Engine coolant reservoir (P.503)
■12-volt battery
P.506
With the engine at operating tem-
perature and turned off, check the 
Engine compartment
Components
A
B
C
D
E
F
G
H
I
Checking and adding the 
engine oil 

503
7 
7-3. Do-it-yourself maintenance
Maintenance and care
■Engine oil consumption 
A certain amount of engine oil will be  
consumed while driving. In the following  situations, oil consumption may increase, and engine oil may need to be  
refilled in between oil maintenance inter- vals.
●When the engine is new, for example directly after purchasing the vehicle or after replacing the engine
●If low quality oil or oil of an inappropri-ate viscosity is used
●When driving at high engine speeds or with a heavy load, when towing, or  
when driving while accelerating or  decelerating frequently
●When leaving the engine idling for a long time, or when driving frequently through heavy traffic
The coolant level is satisfactory if it  
is between the “FULL” and “LOW”  
lines on the reservoir when the  
hybrid system is cold.
■Engine coolant reservoir 
Reservoir cap 
“FULL” line
WARNING
■Used engine oil
●Used engine oil contains poten- 
tially harmful contaminants which  may cause skin disorders such as inflammation and skin cancer, so  
care should be taken to avoid pro- longed and repeated contact. To remove used engine oil from your  
skin, wash thoroughly with soap  and water.
●Dispose of used oil and filters only in a safe and acceptable manner. Do not dispose of used oil and fil- 
ters in household trash, in sewers  or onto the ground. Call any autho-rized Toyota retailer or Toyota  
authorized repairer, or any reliable  repairer, service station or auto parts store for information concern- 
ing recycling or disposal.
●Do not leave used engine oil within 
the reach of children.
NOTICE
■To prevent serious engine dam- age 
Check the oil level on a regular basis.
■When replacing the engine oil
●Be careful not to spill engine oil on  the vehicle components.
●Avoid overfilling, or the engine could be damaged.
●Check the oil level on the dipstick every time you refill the vehicle.
●Be sure the engine oil filler cap is properly tightened.
■If oil is spilled on the engine cover 
To prevent the engine cover from  
being damaged, remove any engine  oil from the engine cover as soon as possible using a neutral detergent. Do  
not use an organic solvent such as  brake cleaner.
Checking the coolant
A
B 

5047-3. Do-it-yourself maintenance
“LOW” line
If the level is on or below the “LOW”  
line, add coolant up to the “FULL” line. 
( P.611)
■Power control unit coolant  
reservoir  
Reservoir cap 
“FULL” line
“LOW” line
If the level is on or below the “LOW”  
line, add coolant up to the “FULL” line. 
( P.613)
■Coolant selection 
Only use “Toyota Super Long Life Coo- lant” or a 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% deion- ized water. (Minimum temperature: -35°C [-31°F]) 
For more details about coolant, contact  any authorized Toyota retailer or Toyota authorized repairer, or any reliable  
repairer.
■If the coolant level drops within a  short time of replenishing 
Visually check the radiators, hoses,  
engine/power control unit coolant reser- voir caps, drain cock and water pump.If you cannot find a leak, have any  
authorized Toyota retailer or Toyota  
authorized repairer, or any reliable  repairer, test the cap and check for leaks in the cooling system.
Check the radiator and condenser,  
and clear away any foreign objects. 
If either of the above parts is  
extremely dirty or you are not sure  
of their condition, have your vehicle  
inspected by any authorized Toyota  
retailer or Toyota authorized  
repairer, or any reliable repairer.
C
A
B
C
WARNING
■When the hybrid system is hot 
Do not remove the engine/power con- trol unit 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 mix-ture 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.
Checking the radiator and  
condenser 

6128-2. Steps to take in an emergency
3After the hybrid system has  
cooled down sufficiently, inspect  
the hoses and radiator core  
(radiator) for any leaks. 
Radiator 
Cooling fan
If a large amount of coolant leaks,  immediately contact any authorized Toyota retailer or Toyota authorized  
repairer, or any reliable repairer.
4 The coolant level is satisfactory  
if it is between the “FULL” and  
“LOW” lines on the reservoir. 
Reservoir 
“FULL” line
“LOW” line 
5 Add coolant if necessary.
Water can be used in an emergency if  
engine coolant is unavailable. If water was added in an emergency,  
have the vehicle inspected at any  
authorized Toyota retailer or Toyota  authorized repairer, or any reliable repairer as soon as possible.
6 Start the hybrid system and turn  
the air conditioning system on to  
check that the radiator cooling  
fan operates and to check for  
coolant leaks from the radiator  
or hoses.
The fan operates when the air condi- tioning system is turned on immediately  
after a cold start. Confirm that the fan is  operating by checking the fan sound and air flow. If it is difficult to check  
these, adjust the temperature control  switch to “LO” and turn the “A/C” switch ON and OFF. After this, turn the air  
conditioning system on and off repeat- edly. (The fan may not operate in freez-ing temperatures.)
7 If the fan is not operating: 
Stop the hybrid system immedi-
ately and contact any authorized  
Toyota retailer or Toyota autho- 
rized repairer, or any reliable  
repairer. 
If the fan is operating: 
Have the vehicle inspected at  
the nearest authorized Toyota  
retailer or Toyota authorized  
repairer, or any reliable repairer.
A
B
A
B
C 

613
8 
8-2. Steps to take in an emergency
When trouble arises
8 Check if “Engine Coolant Temp  
High Stop in a Safe Place See  
Owner’s Manual” is shown on  
the multi-information display. 
If the message does not disap- 
pear: 
Stop the hybrid system and con- 
tact any authorized Toyota  
retailer or Toyota authorized  
repairer, or any reliable repairer. 
If the message is not displayed: 
Have the vehicle inspected at  
the nearest authorized Toyota  
retailer or Toyota authorized  
repairer, or any reliable repairer.
■If “Hybrid System Overheated  
Output Power Reduced” is  
shown on the multi-informa- 
tion display 
1 Stop the vehicle in a safe place. 
2 Stop the hybrid system and  
carefully lift the hood. 
3 After the hybrid system has  
cooled down, inspect the hoses  
and radiator core (radiator) for  
any leaks. 
Radiator 
Cooling fan
If a large amount of coolant leaks,  
immediately contact any authorized  Toyota retailer or Toyota authorized repairer, or any reliable repairer.
4 The coolant level is satisfactory  
if it is between the “FULL” and  
“LOW” lines on the reservoir. 
Reservoir 
“FULL” line
“LOW” line 
5 Add coolant if necessary.
Water can be used in an emergency if  power control unit coolant is unavail-able.  
If water was added in an emergency,  have the vehicle inspected at any authorized Toyota retailer or Toyota  
authorized repairer, or any reliable  repairer as soon as possible.
6 After stopping the hybrid system  
and waiting for 5 minutes or  
more, start the hybrid system  
again and check the multi-infor-
A
B
A
B
C 

6148-2. Steps to take in an emergency
mation display. 
If the message does not disap- 
pear: Stop the hybrid system  
and contact any authorized  
Toyota retailer or Toyota autho- 
rized repairer, or any reliable  
repairer.
If the message is not displayed: The  hybrid system temperature has dropped and the vehicle may be driven  
normally.  However, if the message appears again frequently, contact any authorized  
Toyota retailer or Toyota authorized  repairer, or any reliable repairer.
WARNING
■When inspecting under the hood of your vehicle 
Observe the following precautions. 
Failure to do so may result in serious  injury such as burns.
●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.
●After the hybrid system has been 
turned off, check that the “READY”  indicator is off.When the hybrid system is operat- 
ing, the gasoline engine may auto- matically start, or the cooling fan may suddenly operate even if the  
gasoline engine stops. Do not touch  or approach rotating parts such as the fan, which may lead to fingers  
or clothing (especially a tie, a scarf  or a muffler) getting caught, result-ing in serious injury.
●Do not loosen the coolant reservoir cap while the hybrid system and  
radiator are hot. High temperature steam or coolant could spray out.
NOTICE
■When adding engine/power con-trol unit coolant 
Add coolant slowly after the hybrid  system has cooled down sufficiently. Adding cool coolant to a hot hybrid  
system too quickly can cause dam- age to the hybrid system.
■To prevent damage to the cool-ing system 
Observe the following precautions:
●Avoid contaminating the coolant  with foreign matter (such as sand or dust, etc.).
●Do not use any coolant additive.