Page 517 of 568
5177-2. Steps to take in an emergency
PRIUS +_OM_OM47D30E_(EE)
7
When trouble arises
WARNING
■After recharging the 12-volt battery 
Have the 12-volt battery inspected at any authorized Toyota retailer or 
Toyota authorized repairer, or any  reliable repairer as soon as possible. 
If the 12-volt battery is deteriorating, continued use may cause the 12-volt 
battery to emit a malodorous gas, whic h may be detrimental to the health of 
passengers. 
■ When replacing the 12-volt battery 
 P. 392
NOTICE
■When handling jumper cables 
When connecting the jumper cables, ensure that they do not become entan- 
gled in the cooling fans, etc. 
■ To prevent damaging the vehicle 
The exclusive jump starting terminal is to be used when charging the 12-volt 
battery from another vehicle in an emergency. It cannot be used to jump
start another vehicle. 
     
        
        Page 518 of 568

5187-2. Steps to take in an emergency
PRIUS +_OM_OM47D30E_(EE)
If your vehicle overheats
■If the high coolant temperature warning light comes on or 
flashes 
Stop the vehicle in a safe place and turn off the air conditioning 
system, and then stop the hybrid system. 
If you see steam:  
Carefully lift the hood after the steam subsides. 
If you do not see steam: 
Carefully lift the hood. 
After the hybrid system has cooled down sufficiently, inspect the 
hoses and radiator core (radiator) for any leaks. 
Radiator 
Cooling fans
If a large amount of coolant 
leaks, immediately contact 
any authorized Toyota retailer 
or Toyota authorized repairer,
or any reliable repairer.
The following may indicate that your vehicle is overheating. 
● The high coolant temperature warning light (P. 449) comes on 
or flashes, or a loss of hybrid system power is experienced. (For 
example, the vehicle speed does not increase.) 
● Vehicles without multi-information display: The hybrid system 
overheat warning light ( P. 449) comes on. 
● Vehicles with multi-information display: The warning message 
indicating overheat is shown on the multi-information display. 
( P. 464) 
● Steam comes out from under the hood.
Correction procedures
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2
3
1
2 
     
        
        Page 520 of 568
5207-2. Steps to take in an emergency
PRIUS +_OM_OM47D30E_(EE) 
■If the hybrid system overheat warning light comes on or the 
warning message indicating overheat is shown on the multi- 
information display 
Stop the vehicle in a safe place. 
Stop the hybrid system and carefully lift the hood. 
After the hybrid system has cooled down, inspect the hoses and 
radiator core (radiator) for any leaks. 
Radiator 
Cooling fans
If a large amount of coolant 
leaks, immediately contact 
any authorized Toyota retailer 
or Toyota authorized repairer,
or any reliable repairer.
The coolant level is satisfactory if it is between the “F” and “L” 
lines on the reservoir. 
Reservoir 
“F” line 
“L” line 
Add coolant if necessary.
Water can be used in an emer- 
gency if coolant is unavailable. 
If water was added in an emer- 
gency, have the vehicle 
inspected at any authorized
Toyota retailer or Toyota autho- 
rized repairer, or any reliable 
repairer as soon as possible.
1
2
3
1
2
4
1
2
3
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        Page 521 of 568

5217-2. Steps to take in an emergency
PRIUS +_OM_OM47D30E_(EE)
7
When trouble arises
After stopping the hybrid system and waiting for 5 minutes or 
more, start the hybrid system and check for the instrument clus- 
ter or multi-information display. 
If the hybrid system overheat warning light does not turn off or 
the message does not disappear:  
Stop the hybrid system and contact any authorized Toyota 
retailer or Toyota authorized repairer, or any reliable repairer. 
If the hybrid system overheat warning light does not come on or 
the message is not displayed:  
The hybrid system temperature has dropped and the vehicle may 
be driven normally.
However, if the warning light comes on again frequently or 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 indicator on the 
power switch and the “READY” indicator are off.  
When the hybrid system is operating, the gasoline engine may automati- 
cally 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, resulting in serious injury. 
● Do not loosen the coolant reservoir cap while the hybrid system and radia- 
tor are hot. 
High temperature steam or coolant could spray out.
6 
     
        
        Page 523 of 568

5237-2. Steps to take in an emergency
PRIUS +_OM_OM47D30E_(EE)
7
When trouble arises
If the vehicle becomes stuck
Set the parking brake and shift the shift position to P. Stop the 
hybrid system. 
Remove the mud, snow or sand from around the stuck tire. 
Place wood, stones or some other material under the tires to help 
provide traction. 
Restart the hybrid system. 
Shift the shift position to D or R, release the parking brake and 
carefully apply the accelerator to free the vehicle.
Carry out the following procedures if the tires spin or the vehicle 
becomes stuck in mud, dirt or snow:
WARNING
■ When attempting to free a stuck vehicle 
If you choose to push the vehicle back and forth to free it, make sure the 
surrounding area is clear to avoid striking other vehicles, objects or people. 
The vehicle may also lunge forward or lunge back suddenly as it becomes 
free. Use extreme caution. 
■ When changing the shift position 
Be careful not to change the shift position with the accelerator pedal 
depressed.  
Changing the shift position to any positions other than P or N may cause the 
vehicle to accelerate abruptly, causing an accident and resulting in death or
serious injury.
NOTICE
■ To avoid damage to the hybrid transmission and other components 
● Avoid spinning the wheels and depressing the accelerator pedal more 
than necessary. 
● If the vehicle remains stuck even after these procedures are performed, 
the vehicle may require towing to be freed.
1
2
3
4
5 
     
        
        Page 542 of 568
5428-2. Customization
PRIUS +_OM_OM47D30E_(EE)■
Instrument cluster (P.  1 1 7 )
*: The default setting varies according to countries.
■
LDA (Lane Departure Alert with steering control)* (P. 284)
*: If equipped
FunctionDefault 
settingCustomized 
setting
Sensor sensitivity for
darkening the brightness
of the instrument cluster
depending on the outside
brightness
Standard-2 to 2––O
Sensor sensitivity for
returning the brightness of
the instrument cluster to
the original level depend-
ing on the outside bright-
ness
Standard-2 to 2––O
Language*English
French
O–OGerman
Spanish
Italian
Unitskm 
(L/100km)km (km/L)OOO
Pop-up displayOnOffO–O
123
FunctionDefault 
settingCustomized 
setting
Steering Assist  functionOnOffO——
Alert sensitivityStandardHighO——
Vehicle sway warning
functionOnOffO——
Vehicle sway warning
sensitivityStandardLowO——High
123 
     
        
        Page 545 of 568
5458-2. Customization
PRIUS +_OM_OM47D30E_(EE)
8
Vehicle specifications
■In the following situations, customize mode in which the settings can be 
changed through the multi-information display will automatically be
turned off. 
● A warning message appears after the customize mode screen is displayed. 
● The power switch is turned off. 
● The vehicle begins to move while the customize mode screen is displayed.
WARNING
■Cautions during customization 
As the hybrid system needs to be operating during customization, ensure 
that the vehicle is parked in a place with adequate ventilation. In a closed 
area such as a garage, exhaust gases including harmful carbon monoxide
(CO) may collect and enter the vehicle. This may lead to death or a serious 
health hazard.
NOTICE
■ During customization 
To prevent 12-volt battery discharge, ens ure that the hybrid system is oper- 
ating while customizing features. 
     
        
        Page 546 of 568
5468-3. Initialization
PRIUS +_OM_OM47D30E_(EE)
Item to initialize
The following item must be initialized for normal system opera-
tion after such cases as the 12-volt battery being reconnected,
or maintenance being performed on the vehicle:
ItemWhen to initializeReference
Tire pressure warning 
system
• When rotating the tires on
vehicles with differing front
and rear tire inflation pres-
sures
• When changing the tire infla-
tion pressure by changing
traveling speed or load
weight, etc.
• When changing the tire size
P. 394