Page 686 of 808

6868-2. Steps to take in an emergency
PRIUS PRIME_OM_OM47E74U_(U)■
If “Shifted into Shift Again to Start Vehicle” is shown
Message is displayed when the automatic P position selection function oper-
ates. ( P. 342)
To start off the vehicle after the shift position is changed to P, operate the shift
lever again.
■ If “Shift to Before Exiting Vehicle” is shown
Message is displayed when the driver’s door is opened without t urning the
power switch to off with the shift position in any position oth er than P.
Shift the shift position to P.
■ If “Shift is in Release Accelerat or Before Shifting” is shown
Message is displayed when the accelerator pedal has been depressed and
the shift position is in N.
Release the accelerator pedal and shift the shift position to D or R.
■ If “Depress Brake When Vehicle is Stopped. Hybrid System may Ov er-
heat.” is shown
The message may be shown when the accelerator pedal is depresse d to hold
the vehicle while the vehicle is stopped on an uphill, etc.
The hybrid system may overheat. Release the accelerator pedal a nd depress
the brake pedal.
■ If “Shifted to Stop Vehicle to Shift to ” is shown
If the P position switch is pressed while driving, the shift po sition is changed
to N and the message is shown. ( P. 341)
■ If “Auto Power OFF to Conserve Battery” is shown
The power switch has been turned off by the automatic power off function.
When starting the hybrid system next time, operate the hybrid s ystem for
approximately 5 minutes to recharge the 12-volt battery.
■ If “Engine Oil Level Low Add or Replace” is displayed
The engine oil level may be low. Check the level of the engine oil, and add
engine oil if necessary. This message may be displayed if the vehicle is
stopped on a slope. Move the vehicle to a level surface and che ck if the mes-
sage disappears.
■ If “Accelerator and Brake Pedals Pressed Simultaneously” is sho wn
The accelerator and brake pedals are being depressed simultaneo usly.
( P. 316)
Release the accelerator pedal and depress the brake pedal.
Page 687 of 808

6878-2. Steps to take in an emergency
PRIUS PRIME_OM_OM47E74U_(U)
8
When trouble arises
■If a message that indicates the malfunction of front camera is displayed
The following systems may be suspended until the problem shown in the
message is resolved. ( P. 376, 671)
● PCS (Pre-Collision System)
● LTA (Lane Tracing Assist)
● AHB (Automatic High Beam)
● RSA (Road Sign Assist) (if equipped)
● Dynamic radar cruise control with full-speed range
■ If a message that indicates the m alfunction of radar sensor is displayed
The following systems may be suspended until the problem shown in the
message is resolved. ( P. 376, 671)
● PCS (Pre-Collision System)
● LTA (Lane Tracing Assist)
● Dynamic radar cruise control with full-speed range
■ If “Radar Cruise Control Unavailable See Owner’s Manual” is sho wn
The dynamic radar cruise control with full-speed range system is suspended
temporarily or until the problem shown in the message is resolv ed. (causes
and coping methods: P. 376)
■ If “Radar Cruise Control Unavailable” is shown
The dynamic radar cruise control with full-speed range system c annot be
used temporarily. Use the system when it becomes available agai n.
■ If “Maintenance Required Soon” is displayed (U.S.A. only)
Indicates that all maintenance according to the driven distance on the mainte-
nance schedule
* should be performed soon.
Comes on approximately 4500 miles (7200 km) after the message has been
reset.
If necessary, perform maintenance. Please reset the message aft er the main-
tenance is performed. ( P. 586)
*: Refer to the separate “Scheduled Maintenance Guide” or “Owner’ s Manual
Supplement” for the maintenance interval applicable to your veh icle.
■ If “Maintenance Required Visit Your Dealer” is displayed (U.S.A . only)
Indicates that all maintenance is required to correspond to the driven distance
on the maintenance schedule
*.
Comes on approximately 5000 miles (8000 km) after the message has been
reset. (The indicator will not work properly unless the message has been
reset.)
Perform the necessary maintenance. Please reset the message aft er the
maintenance is performed. ( P. 586)
*: Refer to the separate “Scheduled Maintenance Guide” or “Owner’ s Manual
Supplement” for the maintenance interval applicable to your veh icle.
Page 697 of 808

6978-2. Steps to take in an emergency
PRIUS PRIME_OM_OM47E74U_(U)
8
When trouble arises
To inject the sealant and inflate
the tire, turn the compressor
switch on.
Inflate the tire until the specified air pressure is reached.The sealant will be injected
and the pressure will spike to
between 44 psi (300 kPa,
3.0 kgf/cm
2 or bar) and
58 psi (400 kPa, 4.0 kgf/cm2
or bar), then gradually
decrease.
The air pressure gauge will
display the actual tire infla-
tion pressure about 1 to 5
minutes after the switch is
turned on.
• Turn the compressor switch off and then check the tire
inflation pressure. Being
careful not to over inflate,
check and repeat the inflation
procedure until the specified
tire inflation pressure is
reached.
• The tire can be inflated for about 5 to 20 minutes (depending on
the outside temperature). If the t ire inflation pressure is still lower
than the specified point after inflation for 25 minutes, the tire is
too damaged to be repaired. Turn the compressor switch off and
contact your Toyota dealer.
• If the tire inflation pressure exceeds the specified air press ure, let
out some air to adjust the tire inflation pressure. ( P. 700, 733)
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Page 709 of 808
7098-2. Steps to take in an emergency
PRIUS PRIME_OM_OM47E74U_(U)
8
When trouble arises
Depress the brake pedal.
Touch the Toyota emblem side
of the electronic key to the
power switch.
When the electronic key is
detected, a buzzer sounds and the
power switch will turn to ON mode.
When the smart key system is
deactivated in customization set-
ting, the power switch will turn to
ACCESSORY mode.
Firmly depress the brake pedal
and check that is shown
on the multi-information display.
Press the power switch.
In the event that the hybrid sy stem still cannot be operated, contact
your Toyota dealer.
Starting the hybrid system
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Page 718 of 808
718
PRIUS PRIME_OM_OM47E74U_(U)
8-2. Steps to take in an emergency
If your vehicle overheats
■If the high coolant temperature warning light comes on or
flashesStop 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 t he
hoses and radiator core (ra diator) for any leaks.
Radiator
Cooling fans
If a large amount of coolant
leaks, immediately contact
your Toyota dealer.
The following may indicate that your vehicle is overheating.
● The high coolant temperature warning light ( P. 673) comes on
or flashes, or a loss of hybrid system power is experienced. (F or
example, the vehicle s peed does not increase.)
● “Hybrid System Overheated” is shown on the multi-information
display.
● Steam comes out from under the hood.
Correction procedures
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Page 719 of 808

7198-2. Steps to take in an emergency
PRIUS PRIME_OM_OM47E74U_(U)
8
When trouble arises
The coolant level is satisfactory if it is between the “MAX” and
“MIN” lines on the reservoir.
Reservoir
“MAX” line
“MIN” line
Add coolant if necessary.
Water can be used in an emer-
gency if coolant is unavailable.
Start the hybrid system and turn the air conditioning system on to
check that the radiator cooling fans operate and to check for
coolant leaks from t he radiator or hoses.
The fans operate when the temperature setting is adjusted to “LO” and
“A/C” switch (
*1 • *2) is turned on immediately after a
cold start. Confirm that the fans are operating by checking the fan sound
and air flow. If it is difficult to check these, turn the “A/C” switch
(
*1 • *2) on and off repeatedly. (The fans may not
operate in freezing temperatures.)
*1: Vehicles with 7-inch display
*2: Vehicles with 11.6-inch display
If the fans are not operating:
Stop the hybrid system immediately and contact your Toyota
dealer.
If the fans are operating:
Have the vehicle inspected at the neare st Toyota dealer.
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Page 720 of 808
7208-2. Steps to take in an emergency
PRIUS PRIME_OM_OM47E74U_(U)■
If “Hybrid System Overheated” is shown on the multi-informa-
tion 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 (radiat or) for any leaks.
Radiator
Cooling fans
If a large amount of coolant
leaks, immediately contact
your Toyota dealer.
The coolant level is satisfactory if it is between the “FULL” a nd
“LOW” lines on the reservoir.
Reservoir
“FULL” line
“LOW” 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 your Toyota dealer as soon as
possible.
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Page 721 of 808

7218-2. Steps to take in an emergency
PRIUS PRIME_OM_OM47E74U_(U)
8
When trouble arises
After stopping the hybrid system and waiting for 5 minutes or
more, start the hybrid system again and check if “Hybrid System
Overheated” is shown on the multi-information display.
If the message d oes not disappear:
Stop the hybrid system and contact your Toyota dealer.
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 your Toyota
dealer.
WARNING
■ To prevent an accident or injury 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 ho od until
the steam has subsided. The engine compartment may be very hot.
● After the hybrid system has been turned off, check that the “Ac cessory”,
“Ignition ON” or mileage display ( P. 210) on the main display and the
“READY” indicator are off.
When the hybrid system is operating, the gasoline engine may au tomati-
cally start, or the cooling fans 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 caps while the hybrid syste m and radi-
ator are hot.
High temperature steam or coolant could spray out.
6