Page 389 of 444

5
When trouble arises
389
5-2. Steps to take in an emergency
If your vehicle overheats
Correction procedures■ If “WATER TEMP” is shown on the multi-information display
Stop the vehicle in a safe plac e and turn off the air condition-
ing system.
Check to see if steam is coming out from under the hood.
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 fans are operating: Wait until the temperature of the engine (shown on the
instrument cluster) begins to fall and then stop the hybrid
system.
If the fans are not operating: Stop the hybrid system imme diately and call your Toyota
dealer.
The following may indicate that your vehicle is overheating:
● “WATER TEMP” is shown on the multi-information display:
The engine may be overheating.
● “HYBRID SYSTEM OVER HEAT” is shown on the multi-informa-
tion display:
The power control unit may be overheating.
Follow the correction procedure as described below.
STEP1
STEP2
STEP3
Page 390 of 444
390 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. 401)
■ If “HYBRID SYSTEM OVER HEAT” is shown on the multi-infor-
mation display
Stop the vehicle in a safe plac e 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 “HYBRID SYSTEM OVER HEAT” 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 local
Toyota dealer.
STEP4
STEP5
STEP1
STEP2
STEP3
Page 391 of 444
5
When trouble arises
391
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. 401)
Have the vehicle checked 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 is coming from the engine area.
Page 392 of 444

392 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.
● With a hybrid vehicle, there are times when the gasoline engine automati-
cally 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 an accidental 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.
Page 397 of 444
397
6-1. Specifications
6
Vehicle specifications
This number is also on the Certi-
fication label on the driver’s side
center pillar.
■ Gasoline engine number and el ectric motor (traction motor)
number
The gasoline engine number and el ectric motor (traction motor) num-
ber are stamped as shown.
Gasoline engine number
Electric motor (traction motor)
number
Page 398 of 444
398 6-1. Specifications
Engine
Fuel
Electric motor (traction motor)
Model2AZ-FXE engine
Type 4 cylinder in-line, 4 cycle, gasoline
Bore and stroke 3.48 × 3.78 in. (88.5 × 96.0 mm)
Displacement 144.1 cu.in. (2362 cm3)
Drive belt tension Automatic adjustment
Valve clearance
(engine cold)
Intake
Exhaust 0.007 ⎯
0.011 in. (0.19 ⎯ 0.29 mm)
0.015 ⎯ 0.019 in. (0.38 ⎯ 0.48 mm)
Fuel type Unleaded gasoline only
Octane rating87 (Research Octane Number 91) or higher
Fuel tank capacity 17.2 gal. (65 L, 14.3 lmp.gal.)
Type Permanent magnet synchronous motor
Maximum output 105 kW
Maximum torque 199 ft•lbf (270 N•m, 27.5 kgf•m)
Page 400 of 444
400 6-1. Specifications
Lubrication system
*: 0W-20 is the oil that provides the optimal level of fuel efficiency.
Oil viscosity
●The 0W portion of the oil viscosity rating indicates the characteristic
of the oil which allows cold startabi lity. Oils with a lower value before
the W allow for easier starting of the engine in cold weather.
● The 20 in 0W-20 indicates the oil visc osity when the oil is at its oper-
ating temperature. An oil with a hi gher viscosity may be better suited
if the vehicle is operated at high speeds, or under extreme load con-
ditions.
Oil capacity
(drain and refill) With filter
Without filter 4.5 qt. (4.3 L, 3.8 Imp.qt.)
4.3 qt. (4.1 L, 3.6 Imp.qt.)
Oil grade
ILSAC multi-grade engine oil
Recommended oil
viscosity Use Toyota approved “Toyota Genuine Motor
Oil” or equivalent to satisfy the grade and vis-
cosity shown below.
Outside temperature
*
Page 401 of 444
401
6-1. Specifications
6
Vehicle specifications
Cooling system
Ignition system
Gasoline engine
Power control
unit
6.6 qt. (6.2 L, 5.5 Imp.qt.)
3.1 qt. (2.9 L, 2.6 Imp.qt.)
Coolant typeUse either of the following.
• “Toyota Super Long Life Coolant”
• 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.
Spark plug
Make
Gap DENSO SK20R11
NGK IFR6A11
0.043 in. (1.1 mm)
NOTICE
■
Iridium-tipped spark plugs
Use only iridium-tipped spark plugs. Do not adjust spark plug gap.