2021 TOYOTA PRIUS immobilizer

TABLE OF CONTENTS2
PRIUS_OM_OM47E09U_(U)For your information....................... 8
Reading this manual .................... 14
How to search .............................. 15
Pictorial index .............................. 16
1-1. For safe use
Before driving ...................... 26
For safe driving ................... 28
Seat belts ............................ 30
SRS airbags ........................ 35
Front passenger occupant classification system ......... 49
Exhaust gas precautions ..... 54
1-2. Child safety Riding with children ............. 55
Child restraint systems ........ 56
1-3. Emergency assistance Safety Connect.................... 76
1-4. Hybrid system Hybrid system features ....... 84
Hybrid system precautions ....................... 88
1-5. Theft deterrent system Immobilizer system ............. 95 2. Instrument cluster
Combination meter .............. 98
Warning lights and indicators ......................... 107
Main display....................... 115
Multi-information display ............................. 124
Head-up display................. 158
Energy monitor/ consumption screen
(vehicles with 7-inch
display) ............................ 165
Energy monitor/ consumption screen
(vehicles with
11.6-inch display) ............ 172
3-1. Key information Keys................................... 180
3-2. Opening, closing and locking the doors
Side doors ......................... 185
Back door .......................... 191
Smart key system .............. 196
3-3. Adjusting the seats Front seats......................... 204
Rear seats ......................... 206
Head restraints .................. 209
1For safety and security
2Instrument cluster
3Operation of each
component

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PRIUS_OM_OM47E09U_(U)
For safety and security1
1-1. For safe useBefore driving ...................... 26
For safe driving ................... 28
Seat belts ............................ 30
SRS airbags ........................ 35
Front passenger occupant classification system ......... 49
Exhaust gas precautions..... 54
1-2. Child safety Riding with children ............. 55
Child restraint systems........ 56
1-3. Emergency assistance Safety Connect ................... 76
1-4. Hybrid system Hybrid system features ....... 84
Hybrid system precautions ....................... 88
1-5. Theft deterrent system Immobilizer system ............. 95

951-5. Theft deterrent system
PRIUS_OM_OM47E09U_(U)
1
For safety and security
Immobilizer system
The indicator light flashes after
the power switch has been turned
off to indicate that the system is
operating.
The indicator light stops flashing
after the power switch has been
turned to ACCESSORY or ON
mode to indicate that the system
has been canceled.
■System maintenance
The vehicle has a maintenance-free type immobilizer system.
■ Conditions that may cause the system to malfunction
●If the grip portion of the key is in contact with a metallic ob ject
● If the key is in close proximity to or touching a key registered to the security
system (key with a built-in transponder chip) of another vehicle
The vehicle’s keys ha ve built-in transponder chips that prevent
the hybrid system from starting if a key has not been previousl y
registered in the vehic le’s on-board computer.
Never leave the keys inside the vehicle when you leave the vehi-
cle. This system is designed to help prevent vehicle theft but does not
guarantee absolute security against all vehicle thefts.

961-5. Theft deterrent system
PRIUS_OM_OM47E09U_(U)■
Certifications for the immobilizer system
For vehicles sold in the U.S.A., Hawaii, American Samoa, Guam, Saipan
and Puerto Rico
For vehicles sold in Canada
NOTICE
■ To ensure the system operates correctly
Do not modify or remove the system. If modified or removed, the proper
operation of the system cannot be guaranteed.

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3-2. Opening, closing and locking the doors
■Electronic Key Battery-Saving Function
When battery-saving mode is set, battery depletion is minimized by stopping
the electronic key from receiving radio waves.
■ Conditions affecting operation
The smart key system, wireless remote control and immobilizer s ystem use
weak radio waves. In the following situations, the communication between
the electronic key and the vehicle may be affected, preventing the smart key
system, wireless remote control and immobilizer system from operating prop-
erly. (Ways of coping: P. 647)
● When the electronic key battery is depleted
● Near a TV tower, electric power plant, gas station, radio stati on, large dis-
play, airport or other facility that generates strong radio wav es or electrical
noise
● When the electronic key is in contact with, or is covered by the following
metallic objects
• Cards to which aluminum foil is attached
• Cigarette boxes that have aluminum foil inside
• Metallic wallets or bags
• Coins
• Hand warmers made of metal
• Media such as CDs and DVDs
● When other wireless key (that emit radio waves) is being used n earby
● When carrying the electronic key together with the following devices that
emit radio waves
• Portable radio, cellular phone, cordless phone or other wirele ss commu-
nication devices
• Another vehicle’s electronic key or a wireless key that emits radio waves
• Personal computers or personal digital assistants (PDAs)
• Digital audio players
• Portable game systems
● If window tint with a metallic content or metallic objects are attached to the
rear window
● When the electronic key is placed near a battery charger or ele ctronic
devices
Press twice while pressing and
holding . Confirm that the electronic
key indicator flashes 4 times.
While the battery-saving mode is set, the
smart key system cannot be used. To
cancel the function, press any of the elec-
tronic key buttons.

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PRIUS_OM_OM47E09U_(U)
4-2. Driving procedures
■When the ambient temperature is low, such as during winter driv ing con-
ditions
● When starting the hybrid system, the flashing time of the “READY” indicator
may be long. Leave the vehicle as it is until the “READY” indic ator is steady
on, as steady means the vehicle is able to move.
● When the hybrid battery (traction battery) is extremely cold (b elow approxi-
mately -22°F [-30°C]) under the influence of the outside temper ature, it may
not be possible to start the hybrid system. In this case, try t o start the hybrid
system again after the temperature of the hybrid battery increa ses due to
the outside temperature increase etc.
■ Conditions affecting operation
P. 198
■ Note for the entry function
P. 199
■ If the hybrid system does not start
●The immobilizer system may not have been deactivated. ( P. 95)
Contact your Toyota dealer.
● If a message related to start-up is shown on the multi-informat ion display,
read the message and follow the instructions.
■ If the “READY” indicator does not come on
In the event that the “READY” indicator does not come on even a fter perform-
ing the proper procedures for starting the vehicle, contact you r Toyota dealer
immediately.
■ If the hybrid system is malfunctioning
P. 89
■ If the electronic key battery is depleted
P. 560
■ Operation of the power switch
●If the switch is not pressed shortly and firmly, the power switch mode may
not change or the hybrid system may not start.
● If attempting to restart the hybrid system immediately after tu rning the power
switch off, the hybrid system may not start in some cases. After turning the
power switch off, please wait a few seconds before restarting t he hybrid sys-
tem.

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7-2. Steps to take in an emergency
If your vehicle needs to be towed
In the following situations, it is not possible to be towed by another
vehicle using cables or chains, as the front wheels may be lock ed due
to the parking lock. Contact your Toyota dealer or commercial towing
service.
● There is a malfunction in t he shift control system. (P. 249, 609)
● There is a malfunction in the immobilizer system. ( P. 95)
● There is a malfunction in the smart key system. (P. 647)
● The 12-volt battery is discharged. ( P. 6 5 0 )
The following may indicate a problem with your hybrid transmiss ion.
Contact your Toyota dealer or commercial towing service before tow-
ing.
● The hybrid system warning message is displayed and the vehicle
does not move.
● The vehicle makes an abnormal sound.
If towing is necessary, we recommend having your vehicle
towed by your Toyota dealer o r commercial towing service,
using a wheel-lift type t ruck or flatbed truck.
Use a safety chain system for all towing, and abide by all stat e/
provincial and local laws.
Situations when it is not possibl e to be towed by another vehicle
Situations when it is necessary to contact dealers before towing

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7
When trouble arises
7-2. Steps to take in an emergency
If the hybrid system will not start
One of the following may be the cause of the problem:
● The electronic key may no t be functioning properly.
* ( P. 647)
● There may not be sufficient f uel in the vehicle’s tank.
Refuel the vehicle. ( P. 90)
● There may be a malfunction in the immobilizer system.
* ( P. 9 5 )
● There may be a malfunction i n the shift control system.
*
(  P. 249, 609)
● The hybrid system may be malfunc tioning due to an electrical prob-
lem such as electronic key battery depletion or a blown fuse. H ow-
ever, depending on the type of malfunction, an interim measure is
available to start the hybrid system. ( P. 646)
● There is a possibility that the t emperature of the hybrid battery
(traction battery) is extremely low (approximately below -22°F
[-30°C]). ( P. 90, 248)
*: It may not be possible to shift the shift position other than P.
One of the following may be the cause of the problem:
● The 12-volt battery may be discharged. ( P. 650)
● The 12-volt battery terminal connections may be loose or corrod ed.
(  P. 524)
Reasons for the hybrid system not starting vary depending on
the situation. Check the followi ng and perform the appropriate
procedure:
The hybrid system will not start even though the correct starting
procedure is being followed. ( P. 245)
The interior lights and headlights are dim, or the horn does no t
sound or sounds at a low volume.