2018 TOYOTA PRIUS PLUG-IN HYBRID stop start

6858-2. Steps to take in an emergency
PRIUS PHV_OM_OM47C99E_(EE)
8
When trouble arises
■If “Maintenance required for Traction battery cooling parts See owner’s
manual” is shown
There is a possibility that the filter may be clogged, the air intake vent may be
blocked or there may be a gap in the duct.
● When the air intake vents or filters are dirty, clean them by the procedures
on P. 578.
● When the air intake vents or filters are not dirty and the warning message is
shown, have the vehicle inspected at any authorized Toyota retailer or
Toyota authorized repairer, or any reliable repairer.
■ If “Traction Battery Needs to be Protected Refrain From the Use of
Position” is shown
This message may be displayed when the shift position is in N.
As the hybrid battery (traction battery) can not be charged when the shift
position is in N, shift the shift position to P when the vehicle is stopped.
■ If “Traction Battery Needs to be Protected Shift into to Restart” is
shown
Message is displayed when the remaining charge for the hybrid battery (trac-
tion battery) is low, because vehicle has been shifted to N for a certain period
of time.
When operating the vehicle, shift to P and restart the hybrid system.
■ If “Shift to Before Exiting Vehicle” is shown
Message is displayed when the driver’s door is opened without turning the
power switch to off with the shift position in any position other than P.
Shift the shift position to P.
■ If “Shift is in Release Accelerator 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 Over-
heat.” is shown
The message may be shown when the accelerator pedal is depressed to hold
the vehicle while the vehicle is stopped on an uphill, etc.
The hybrid system may overheat. Release the accelerator pedal and depress
the brake pedal.

6868-2. Steps to take in an emergency
PRIUS PHV_OM_OM47C99E_(EE)
■ If “Shifted to Stop Vehicle to Shift to ” is shown
If the P position switch is pressed while driving, the shift position is changed
to N and the message is shown. ( P. 359)
■ 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 system for
approximately 5 minutes to recharge the 12-volt battery.
■ If “Accelerator and Brake Pedals Depressed Simultaneously” is shown
The accelerator and brake pedals are being depressed simultaneously.
( P. 338)
Release the accelerator pedal and depress the brake pedal.
■ If “Forward Camera System Unavailable” or “Forward Camera System
Unavailable Clean Windshield” is displayed.
The following systems may be suspended until the problem shown in the
message is resolved. ( P. 406, 671)
● PCS (Pre-Crash Safety system)
● LDA (Lane Departure Alert with steering control)
● Dynamic radar cruise control with full-speed range
● AHS (Adaptive High-beam System)
■ If the shift position cannot be changed or the power switch is turned to
ACCESSORY mode even if trying to turn the power switch off when a
warning message is shown
If the 12-volt battery is discharged or the shift control system is malfunction-
ing, the followings may occur.
● The shift position may not be changed to P.
When parking, stop the vehicle on level ground and apply the parking brake
firmly.
● The hybrid system may not start.
● The power switch may be turned to ACCESSORY mode even if trying to
turn the power switch off.
In this case, the power switch may be turned off after applying the parking
brake.
● The automatic P position selection function (P. 360) may not operate.
Before turning the power switch off, be sure to press the P position switch
and check that the shift position is in P by the shift position indicator or P
position switch indicator.
■ Warning buzzer
 P. 678

7118-2. Steps to take in an emergency
PRIUS PHV_OM_OM47C99E_(EE)
8
When trouble arises
■Stopping the hybrid system
Set the parking brake, shift the shift position to P and press the power switch
as you normally do when stopping the hybrid system.
■ Replacing the key battery
As the above procedure is a temporary measure, it is recommended that the
electronic key battery be replaced imm ediately when the battery is depleted.
( P. 646)
■ Alarm (if equipped)
Using the mechanical key to lock the doors will not set the alarm system.
If a door is unlocked using the mechanical key when the alarm system is set,
the alarm may be triggered. ( P. 8 8 )
■ Changing power switch modes
Release the brake pedal and press the power switch in step above. The
hybrid system does not start and modes will be changed each time the switch
is pressed. ( P. 353)
■ When the electronic key does not work properly
● Make sure that the smart entry & start system has not been deactivated in
the customization setting. If it is off, turn the function on.
(Customizable features: P. 738)
● Check if battery-saving mode is set. If it is set, cancel the function.
( P. 289)
WARNING
■When using the mechanical key and operating the power windows
Operate the power window after checking to make sure that there is no pos-
sibility of any passenger having any of their body parts caught in the win-
dow.
Also, do not allow children to operate the mechanical key. It is possible for
children and other passengers to get caught in the power window.
3

7198-2. Steps to take in an emergency
PRIUS PHV_OM_OM47C99E_(EE)
8
When trouble arises
The coolant level is satisfactory if it is between the “FULL” and
“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.
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 the radiator or hoses.
The fans operate when the temperature setting is adjusted to “LO” and
“A/C” switch ( ) is turned on immediately after a cold start. Con-
firm 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 ( ) on and off
repeatedly. (The fans may not operate in freezing temperatures.)
If the fans are not operating:
Stop the hybrid system immediately and contact any authorized
Toyota retailer or Toyota authorized repairer, or any reliable
repairer.
If the fans are operating:
Have the vehicle inspected at the nearest any authorized Toyota
retailer or Toyota authorized repairer, or any reliable repairer.
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7218-2. Steps to take in an emergency
PRIUS PHV_OM_OM47C99E_(EE)
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 does not disappear:
Stop the hybrid system and contact any authorized Toyota
retailer or Toyota authorized 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 autho-
rized Toyota retailer or Toyota authorized repairer, or any reliable
repairer.
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 hood until
the steam has subsided. The engine compartment may be very hot.
● After the hybrid system has been turned off, check that the “Accessory”,
“Ignition ON” or mileage display ( P. 216) on the main display and the
“READY” indicator are off.
When the hybrid system is operating, the gasoline engine may automati-
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 system and radi-
ator are hot.
High temperature steam or coolant could spray out.
6

7238-2. Steps to take in an emergency
PRIUS PHV_OM_OM47C99E_(EE)
8
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 front wheels.
Place wood, stones or some other material under the front wheels
to help provide traction.
Restart the hybrid system.
Shift the shift position to D or R and release the parking brake.
Then, while exercising caution, depress the accelerator pedal.
■ When it is difficult to free the vehicle
Carry out the following procedures if the tires spin or the vehicle
becomes stuck in mud, dirt or snow:
Press to turn off TRC. ( P. 520)
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752What to do if... (Troubleshooting)
PRIUS PHV_OM_OM47C99E_(EE)
●The seat belt reminder light is flashing
Are the driver and all the passengers wearing the seat belts? (P. 677)
●The parking brake indicator is on
Is the parking brake released? (P. 364)
Depending on the situation, other types of warning buzzer may also sound.
(P. 671, 680)
●Did anyone inside the vehicle open a door during setting the alarm?
The sensor detects it and the alarm sounds. (P. 88)
To stop the alarm, turn the power switch to ON mode or start the hybrid sys-
tem.
●Is the electronic key left inside the vehicle?
Check the message on the multi-information display. (P. 680)
●When a warning light turns on or a warning message is displayed, refer to
P. 671, 680.
A warning buzzer sounds during driving
An alarm is activated and the horn sounds
(vehicles with alarm)
A warning buzzer sounds when leaving the vehicle
A warning light turns on or a warning message is displayed

758Alphabetical index
PRIUS PHV_OM_OM47C99E_(EE)
Doors ................................ 277, 282
Back door .............................. 282
Door glasses ......................... 330
Door lock ............................... 277
Open door warning buzzer.... 674
Open door warning light ........ 674
Outside rear view mirrors ...... 328
Rear door child-protectors .... 280
Side doors ............................. 277
Side windows ........................ 330
Double locking system.............. 87
Drive information ..................... 225
Drive-Start Control................... 338
Driver’s seat belt reminder
light ......................................... 674
Driving ...................................... 336
Break-in tips .......................... 339
Correct posture ....................... 32
Driving in the rain .................. 337
Driving mode select switch ... 437
Plug-in hybrid vehicle driving
tips ...................................... 116
Procedures............................ 336
Winter drive tips .................... 525
Dynamic radar cruise control
with full-speed range ............ 422
ECB (Electronically
Controlled Brake System) .... 518
Eco drive mode ........................ 437
Electric motor
(traction motor)........................ 96
Location .................................. 96
Specification.......................... 729Electric Power Steering
(EPS)....................................... 519
Function ................................ 519
Warning light ......................... 672
Electronic key .......................... 272
Battery-saving function ......... 289
If the electronic key does not
operate properly ................. 708
Replacing the battery ............ 646
Electronically Controlled
Brake System (ECB) ............. 518
Emergency, in case of
If a warning buzzer sounds ... 671
If a warning light turns on...... 671
If a warning message is
displayed ............................ 680
If the 12-volt battery is
discharged .......................... 712
If the electronic key does not
operate properly ................. 708
If the hybrid system will not
start .................................... 706
If you have a flat tire ............. 688
If you lose your keys ..... 273, 276
If you think something is
wrong.................................. 670
If your vehicle becomes
stuck ................................... 723
If your vehicle has to be
stopped in an emergency ... 663
If your vehicle needs to be
towed .................................. 664
If your vehicle overheats ....... 718
E