2012 TOYOTA YARIS HYBRID check engine

480 4-3. Do-it-yourself maintenance
YARIS_F (including HV)_WE_52C79E
Coolant selection
Only use “Toyota Super Long Life Coolant” 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%
deionized water. (Minimum temperature: -35C [-31F])
For more details about engine coolant, contact any authorized Toyota dealer
or repairer, or another duly qualified and equipped professional.
If the coolant level drops within a short time of replenishing
Except hybrid vehicle: Visually check the radiator, hoses, engine coolant res-
ervoir cap, drain cock and water pump.
Hybrid vehicle: Visually check the radiator, hoses, engine/power control unit
coolant reservoir caps, drain cock and water pump.
If you cannot find a leak, have any authorized Toyota dealer or repairer, or
another duly qualified and equipped professional, test the cap and check for
leaks in the cooling system.
CAUTION
When the engine is hot (except hybrid vehicle)
Do not remove the radiator cap (gasoline engine), or the engine coolant res-
ervoir cap (diesel engine).
The cooling system may be under pressure and may spray hot coolant if the
cap is removed, causing serious injuries, such as burns.
When the hybrid system is hot (hybrid vehicle)
Do not remove the engine/power control 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.

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.

510
4-3. Do-it-yourself maintenance
YARIS_F (including HV)_WE_52C79E
Checking and replacing fuses
If any of the electrical components do not operate, a fuse may have
blown. If this happens, check and replace the fuses as necessary.
Except hybrid vehicle
Vehicles without a smart entry & start system:
Turn the engine switch is in the “LOCK” position.
Vehicles with a smart entry & start system:
Turn the “ENGINE START STOP” switch off.
Hybrid vehicle
Vehicles without an electronic key:
Turn the engine switch is in the “LOCK” position.
Vehicles with an electronic key:
Turn the “POWER” switch off.
Open the fuse box cover.
Except hybrid vehicle
Engine compartment (type A fuse box):
Push the tab in and lift the lid
off.

570 5-2. Steps to take in an emergency
YARIS_F (including HV)_WE_52C79E
Follow the correction procedures.
After taking the specified steps to correct the suspected problem,
check that the warning light goes off.
Warning lightWarning light/DetailsCorrection procedure
Open door warning light
(warning buzzer)*
1
Indicates that a door is not
fully closed.Check that all the doors are
closed.
Low fuel level warning
light
Except hybrid vehicle
Gasoline engine:
Indicates that remaining fuel
is about 5.8 L (1.5 gal., 1.3
Imp. gal.) or less.
Diesel engine:
Indicates that remaining fuel
is about 6.4 L (1.7 gal., 1.4
Imp. gal.) or less.
Hybrid vehicle
Indicates that remaining fuel
is about 5.2 L (1.4 gal., 1.1
Imp. gal.) or less.Refuel the vehicle.
(On the instru-
ment cluster)Driver’s and front passen-
ger’s seat belt reminder
light (warning buzzer)*
2
Warns the driver and front
passenger to fasten their
seat belts.Fasten the seat belt.
(On the center
panel)Rear passengers’ seat
belt reminder lights
(warning buzzer)*
2
(if equipped)
Warns the rear passen-
gers to fasten their seat
belts.Fasten the seat belt.

5
571 5-2. Steps to take in an emergency
When trouble arises
YARIS_F (including HV)_WE_52C79E
Low engine oil level warn-
ing light (diesel engine
only)
Indicates that engine oil
level is low.Check the level of engine
oil, and add if necessary.
Hybrid system overheat
warning light and warning
buzzer (hybrid vehicle)
Indicates that the hybrid
system has overheated.
This light may come on
when driving under severe
operating conditions. (For
example, when driving up
a long steep hill.)Stop and check. (P. 639)
P position request indica-
tor light (hybrid vehicle)
An attempt was made to
start the hybrid systemShift the shift lever to P.
P position request indica-
tor light and warning
buzzer (hybrid vehicle)
• Indicates that the driver’s
door was opened with the
shift lever in N, D or B.
• Indicates that the hybrid
battery (traction battery)
power has dropped
because a long period of
time has elapsed after
shifting the shift lever to N.• Shift the shift lever to P.
• Shift the shift lever to P and
restart the hybrid system
when starting the vehicle.
Warning lightWarning light/DetailsCorrection procedure

5
573 5-2. Steps to take in an emergency
When trouble arises
YARIS_F (including HV)_WE_52C79E
(Flashes)Engine oil change
reminder light (diesel
engine only)
Indicates that the engine
oil is scheduled to be
changed.
• Vehicles without a DPF
system*
4:
Flashes approximately
35000 km (22000 miles)
after the engine oil is
changed. (The indicator
will not work properly
unless the oil maintenance
data has been reset).
• Vehicles with a DPF
system*
4:
Flashes approximately
14500 km (9000 miles)
after the engine oil is
changed. (P. 580) (The
indicator will not work
properly unless the oil
maintenance data has
been reset).Check the engine oil, and
change if necessary. After
changing the engine oil, the
oil change system should
be reset. (P. 476)
Warning lightWarning light/DetailsCorrection procedure

574 5-2. Steps to take in an emergency
YARIS_F (including HV)_WE_52C79E
*1: Open door warning buzzer:
A buzzer will sound if the vehicle reaches a speed of 5 km/h (3 mph) or
more with any door open.
*
2: Driver’s and passengers seat belt reminders:
The driver’s and passengers seat belt buzzer sounds to alert the driver and
passengers that their seat belt is not fastened. The buzzer sounds for 30
seconds after the vehicle has reached a speed of at least 20 km/h (12 mph).
Then, if the seat belt is still unfastened, the buzzer will sound in a different
tone for 90 more seconds.
*
3: The DPF system warning light may not turn off when the engine oil change
reminder light is on. In this event, have the vehicle inspected by any autho-
rized Toyota dealer or repairer, or another duly qualified and equipped pro-
fessional.
*
4: To determine whether or not your vehicle has a DPF system, contact any
authorized Toyota dealer or repairer, or another duly qualified and equipped
professional. (Comes on)Engine oil change
reminder light (diesel
engine only)
Indicates that the engine
oil should be changed.
• Vehicles without a DPF
system*
4:
Comes on approximately
40000 km (25000 miles)
after the engine oil is
changed (and the oil main-
tenance data has been
reset).
• Vehicles with a DPF
system*
4:
Comes on approximately
15000 km (9300 miles)
after the engine oil is
changed (and the oil main-
tenance data has been
reset).Check and change the
engine oil and oil filter by
any authorized Toyota
dealer or repairer, or
another duly qualified and
equipped professional. After
changing the engine oil, the
oil change system should
be reset. (P. 476)
Warning lightWarning light/DetailsCorrection procedure

5
575 5-2. Steps to take in an emergency
When trouble arises
YARIS_F (including HV)_WE_52C79E
Follow the correction procedures. (vehicles with a smart entry &
start system or push-button start system)
After taking the specified steps to correct the suspected problem,
check that the warning light goes off.
Interior
buzzerExterior
buzzerWarning
lightWarning light/DetailsCorrection
procedure
Continuous Continuous
(Flashes
in
yellow)Smart entry & start system
indicator light (vehicles
with a hybrid transmission
or a Multidrive)
Except hybrid vehicle
The electronic key was car-
ried outside the vehicle and
the driver’s door was
opened and closed while
any shift position other than
P was selected without turn-
ing off the “ENGINE START
STOP” switch.
Hybrid vehicle
The electronic key was car-
ried outside the vehicle and
the driver’s door was
opened and closed while
any shift position other than
P was selected without turn-
ing off the “POWER” switch.• Change the
shift position to
P.
• Bring the elec-
tronic key back
into the vehicle.