
PRIUS PRIME_OM_OM47C77U_(U)
6077-3. Do-it-yourself maintenance
7
Maintenance and care
■Situations in which the tire pressure warning system may not oper-
ate properly
●In the following cases, the tire pressure warning system may no t operate
properly.
• If non-genuine Toyota wheels are used.
• When a replacement tire is used, the system may not operate cor-
rectly due to the structure of the replacement tire.
• A tire has been replac ed with a tire that is not of the specif ied size.
• Tire chains etc . are equipped.
• An auxiliary-supported ru n-flat tire is equipped.
• If a window tint that affects the radio wave signals is instal led.
• If there is a lot of snow or ice on the vehicle, particularly around the
wheels or wheel housings.
• If the tire inflation pressure is extremely higher than the sp ecified
level.
• If wheel without the tire pressure warning valve and transmitt er is
used.
• If the ID code on the tire pressure warning valves and transmi tters is
not registered in the tire pressure warning computer.
●Performance may be affected in the following situations.
• Near a TV tower, electric power plant, gas station, radio stat ion, large
display, airport or other facilit y that generates strong radio waves or
electrical noise
• When carrying a portable radio, cellular phone, cordless phone or
other wireless communication device
●When the vehicle is parked, the time taken for the warning to s tart or go
off could be extended.
●When tire inflation pressure declines rapidly for example when a tire has
burst, the warning may not function.
■The initialization operation
●Make sure to carry out initializ ation after adjusting the tire inflation pres-
sure.
Also, make sure the tires are co ld before carrying out initialization or tire
inflation pressure adjustment.
●If you have accidentally turned the power switch off during ini tialization,
it is not necessary to press the reset swit ch again as initialization will
restart automatically when the power switch has been turned to ON
mode for the next time.
●If you accidentally press the reset switch when initialization is not neces-
sary, adjust the tire inflation pressure to the specified level when the
tires are cold, and cond uct initialization again.

648
PRIUS PRIME_OM_OM47C77U_(U)
7-3. Do-it-yourself maintenance
■Replacing the following bulbs
If any of the lights listed below has burnt out, have it replaced by
your Toyota dealer.
● Headlights and daytime running lights
● Front side marker lights
● Parking lights
● Fog lights (if equipped)
● LED accent lights (if equipped)
● Front turn signal lights
● Rear turn signal lights
● Rear side marker lights
● Tail lights
● Stop lights
● High mounted stoplight
● License plate lights
■LED lights
The lights other than the back-up lights each consist of a numb er of LEDs. If
any of the LEDs burn out, take your vehicle to your Toyota deal er to have the
light replaced.
■ Condensation build-up on the inside of the lens
Temporary condensation build-up on the inside of the lens does not indicate a
malfunction. Contact your Toyota dealer for more information in the following
situations:
● Large drops of water have built up on the inside of the lens.
● Water has built up inside the light.
■ When replacing light bulbs
P. 640

652
PRIUS PRIME_OM_OM47C77U_(U)
8-1. Essential information
Emergency flashers
Press the switch.
All the turn signal lights will flash. To turn them off, press the switch once
again.
■ Emergency flashers
●If the emergency flashers are used for a long time while the hy brid system is
not operating (while the “READY” indicator is not illuminated), the 12-volt
battery may discharge.
● If any of the SRS airbags deploy (inflate) or in the event of a strong rear
impact, the emergency flashers will turn on automatically.
The emergency flashers will turn off automatically after operat ing for
approximately 20 minutes. To manually turn the emergency flashe rs off,
press the switch twice.
(The emergency flashers may not turn on automatically depending on the
force of the impact and conditions of the collision.)
The emergency flashers are used to warn other drivers when the
vehicle has to be stopped in the road due to a breakdown, etc.
Vehicles with 7-inch displayVehicles with 11.6-inch display

746
PRIUS PRIME_OM_OM47C77U_(U)
9-2. Customization
■Power windows (P. 312)
■Reverse warning buzzer ( P. 345)
■Turn signal lever ( P. 348)
FunctionDefault
settingCustomized setting
Mechanical key linked opera-
tion (open)OffOn––O
Mechanical key linked opera-
tion (close)OffOn––O
Wireless remote control linked
operation (open only)OffOn––O
Mechanical key, wireless
remote control linked opera-
tion signal (buzzer)
OnOff––O
123
FunctionDefault settingCustomized setting
Signal (buzzer) when the shift
position is in RIntermittentSingle––O
123
FunctionDefault settingCustomized setting
Times of flashing of the lane
change signal flashers3
Off
––O5
7
123

750
PRIUS PRIME_OM_OM47C77U_(U)
9-2. Customization
■Seat belt reminder (P. 667)
■Vehicle customization
●When the Speed linked door locking function and the Shift posit ion linked
door locking function are both on, the door lock operates as follows.
• When shifting the shift position to any position other than P, all the doors
will be locked.
• If the vehicle is started with all the doors locked, the Speed linked door locking function would not operate.
• If the vehicle is started with any door unlocked, the Speed li nked door
locking function will operate.
● When the smart key system is off, Smart door unlocking cannot be custom-
ized.
● When the doors remain closed after unlocking the doors and the automatic
door lock function is activated, the signals will be generated in accordance
with the operation signal (buzzer) and the operation signal (emergency
flashers) settings.
■ In the following situations, customize mode in which the settings can be
changed through the multi-information display will automatically be
turned off.
●The power switch is turned off.
● The vehicle begins to move while the customize mode screen is displayed.
FunctionDefault
settingCustomized setting
Vehicle speed linked seat belt
reminder buzzerOnOff––O
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, ensure that the hybrid sy stem is oper-
ating while customizing features.
123

780Alphabetical index
PRIUS PRIME_OM_OM47C77U_(U)
Front seats ............................... 299Adjustment ............................ 299
Cleaning................................ 569
Correct driving posture ........... 28
Head restraints ..................... 303
Seat heaters ......................... 526
Front side marker lights.......... 350 Light switch ........................... 350
Replacing light bulbs............. 648
Front turn signal lights ........... 348 Replacing light bulbs............. 648
Turn signal lever ................... 348
Fuel ........................................... 368 Capacity ................................ 720
Fuel gauge ............................ 209
Information ............................ 727
Refueling............................... 368
Type ...................................... 720
Warning light ......................... 664
Fuel consumption.... 231, 263, 269
Average fuel consumption .... 231
Current fuel consumption...... 269
Fuel filler door.......................... 368
Opener .................................. 370
Refueling............................... 368
When the fuel filler door cannot be opened............... 371
Fuses ........................................ 638
Garage door opener ................ 555
Glove box ................................. 532 Hands-free system (for
cellular phone)
*
Head restraints ........................ 303
Head-up display....................... 251
Headlights ................................ 350
Automatic High Beam ........... 355
Headlight aim................ 641, 766
Light switch ........................... 350
Replacing light bulbs ............ 648
Heated steering wheel ............ 526
Heaters Automatic air conditioning system.... 500, 511
Heated steering wheel .......... 526
Hybrid battery (traction
battery) ............................... 135
Outside rear view
mirrors ........................ 504, 515
Seat heaters ......................... 526
High coolant temperature
warning light.......................... 664
High mounted stoplight Replacing.............................. 648
High-voltage components ........ 98
Hill-start assist control ........... 490
Hood ......................................... 585
Hooks Coat hooks ........................... 553
Grocery bag hook ................. 537
Retaining hooks (floor mat) .... 26
Horn .......................................... 306
HV mode ..................................... 87
G
H

782Alphabetical index
PRIUS PRIME_OM_OM47C77U_(U)
Jack........................................... 618Positioning a floor jack .......... 587
Vehicle-equipped jack........... 618
Jack handle .............................. 618
Jam protection function.......... 313
Keyless entry ........................... 280 Smart key system ................. 290
Wireless remote control ........ 280
Keys .......................................... 274
Battery-saving function ......... 292
Electronic key ....................... 274
Engine switch........................ 336
If the electronic key does not operate properly ................. 699
If you lose your keys ..... 275, 278
Key number plate.................. 274
Keyless entry ........................ 280
Mechanical key ..................... 275
Power switch......................... 336
Replacing the battery ............ 635
Smart key system ................. 290
Warning buzzer..................... 291
Wireless remote control ........ 274
Knee airbags .............................. 36 Language (multi-information
display) .................................. 246
LATCH system ........................... 70
LDA (Lane Departure Alert with steering control) ........... 393
Lever Auxiliary catch lever.............. 585
Hood lock release lever ........ 585
Shift lever.............................. 342
Tilt and telescopic steering lock release lever ............... 306
Turn signal lever ................... 348
Wiper lever ........................... 362
License plate lights ................. 350
Light switch ........................... 350
Replacing light bulbs ............ 648
Light
Automatic High Beam ........... 355
Door courtesy lights .............. 528
Emergency flasher switch..... 652
Fog light switch ..................... 360
Headlight switch ................... 350
Illuminated entry system ....... 530
Interior lights ................. 529, 530
Interior light list ..................... 528
Luggage compartment light..................................... 286
Personal lights ...................... 529
Replacing light bulbs ............ 643
Shift lever light ...................... 528
Turn signal lever ................... 348
Vanity lights .......................... 540
Wattage ................................ 726
Light bulbs Replacing.............................. 643
Wattage ................................ 726
Load capacity .......................... 333
Luggage cover ......................... 538
J
K
L

785Alphabetical index
PRIUS PRIME_OM_OM47C77U_(U)
Radar cruise controlDynamic radar cruise control with full-speed range .......... 403
Radiator .................................... 594
Radio
*
RCTA (Rear Cross Traffic Alert) ....................................... 428 Blind Spot Monitor function ............................... 425
Rear Cross Traffic Alert function ............................... 428
Rear Cross Traffic Alert
(RCTA) .................................... 428 Blind Spot Monitor function ............................... 425
Rear Cross Traffic Alert function ............................... 428
Rear passengers’ seat belt
reminder light ........................ 665
Rear seat .................................. 301
Rear side marker lights ........... 350
Light switch ........................... 350
Replacing light bulbs............. 648
Rear turn signal lights............. 348
Replacing light bulbs............. 648
Turn signal lever ................... 348
Rear view mirror Inside rear view mirror .......... 308
Outside rear view mirrors...... 310
Rear view monitor system
*
Rear window defogger .... 504, 515
Refueling .................................. 368 Capacity ................................ 720
Fuel types ............................. 720
Opening the fuel tank cap ..... 370
When the fuel filler door cannot be opened............... 371
Regenerative braking ................ 94
Remote Air Conditioning System ................................... 522 Replacing
Electronic key battery ........... 635
Fuses .................................... 638
Light bulbs ............................ 643
Tires...................................... 617
Wiper insert .......................... 632
Reporting safety defects for U.S. owners...................... 754
Resetting the message
indicating maintenance is
required.................................. 576
Road accident cautions .......... 102
S-APGS (Simple Advanced Parking Guidance
System) .................................. 455
S-FLOW mode.................. 501, 513
Safety Connect .......................... 76
Seat back pockets ................... 535
Seat belts ................................... 30 Adjusting the seat belt ............ 31
Automatic Locking Retractor (ALR) .................... 31
Child restra int system
installation ............................ 64
Cleaning and maintaining
the seat belt........................ 572
Emergency Locking Retractor (ELR) .................... 31
How to wear your seat belt ..... 30
How your child should wear the seat belt.......................... 32
Pregnant women, proper seat belt use ......................... 33
Reminder light and buzzer.... 664
Seat belt extender .................. 32
Seat belt instructions for Canadian owners ............... 755
Seat belt pretensioners........... 31
SRS warning light ................. 663
Seat heaters ............................. 526
R
S
*: Refer to “NAVIGATION SYSTEM OWNER’S MANUAL” or “MULTIMEDIA OWNER’S MANUAL”.