2023 TOYOTA PRIUS PLUG-IN HYBRID cruise control

4155-5. Using the driving support systems
Prius Plug-in Hybrid_OM_OM47F38E_(EE)
5
Driving
■Automatic cancelation of constant speed control mode
Constant speed control mode is automatically canceled in the following situa-
tions:
●Actual vehicle speed is more than approximately 16 km/h (10 mph) below
the set vehicle speed.
●Actual vehicle speed falls below approximately 30 km/h (20 mph).
●VSC is activated.
●TRC is activated for a period of time.
●When the VSC or TRC system is turned off.
●When the brake control or output restriction control of a driving support sys-
tem operates.
(For example: Pre-Collision System, Drive-Start Control)
If constant speed control mode is automatically canceled for any reasons
other than the above, there may be a malfunction in the system. Contact any
authorized Toyota retailer or Toyota authorized repairer, or any reliable
repairer.
■The Dynamic Radar Cruise Control with Road Sign Assist may not oper-
ate properly when
As the Dynamic Radar Cruise Control with Road Sign Assist may not oper-
ate properly in conditions in which RSA may not operate or detect correctly
(P. 399), when using this function, make sure to check the speed limit
sign displayed.
In the following situations, the set speed may not be changed to the recog-
nized speed limit by pushing the lever up or down.
●If speed limit information is not available
●When the recognized speed limit is the same as the set speed
●When the recognized speed limit is outside of the speed range that the
dynamic radar cruise control system can operate
■Brake operation
A brake operation sound may be heard and the brake pedal response may
change, but these are not malfunctions.
■Warning messages and buzzers for dynamic radar cruise control with
full-speed range
Warning messages and buzzers are used to indicate a system malfunction or
to inform the driver of the need for caution while driving. If a warning message
is shown on the multi-information display, read the message and follow the
instructions. (P. 366, 667)

4205-5. Using the driving support systems
Prius Plug-in Hybrid_OM_OM47F38E_(EE)
Speed limiter
Press the switch to activate the
speed limiter.
Press the switch once more to
deactivate the speed limiter.
Accelerate or decelerate to the
desired speed and push the lever
down to set the desired maximum
speed.
If the lever is pushed down while
the vehicle is stopped or being
driven of 30 km/h (19 mph) or less,
the set speed will be 30 km/h
(19 mph).
A desired maximum speed can be set using the cruise control
switch.
The speed limiter prevents vehicle speed from exceeding the set
speed.
Setting the vehicle speed

4225-5. Using the driving support systems
Prius Plug-in Hybrid_OM_OM47F38E_(EE)
■Automatic speed limiter cancellation
The set speed is automatically canceled in any of the situations:
● Cruise control is activated.
● When the VSC system and/or TRC system is turned off by pressing the
VSC OFF switch.
■ If the “Speed Limiter Malfunction Visit Your Dealer” is displayed on the
multi-information display
Stop in a safe location, turn the power switch off and back on again, and then
set the speed limiter. If the speed limiter cannot be set, the system may be
malfunctioning. Even though the vehicle can be driven normally, have the
vehicle inspected by any authorized Toyota retailer or Toyota authorized
repairer, or any reliable repairer.
WARNING
■ To avoid operating the speed limiter by mistake
Keep the speed limiter switch off when not in use.
■ Situations unsuitable for speed limiter
Do not use the speed limiter in either of the following situations.
Doing so may result in control of the vehicle being lost and could cause a
serious or fatal accident.
● On slippery roads, such as those covered with rain, ice or snow
● On steep hills
NOTICE
When a warning is issued using the meter display and buzzer after exceed-
ing the set speed limit on a steep decline, depress the brake pedal to decel-
erate.

6698-2. Steps to take in an emergency
Prius Plug-in Hybrid_OM_OM47F38E_(EE)
8
When trouble arises
■Warning messages
The warning messages explained below may differ from the actual messages
according to operation conditions and vehicle specifications.
■ System warning lights
The master warning light does not come on or flash in the following cases.
Instead, a separate system warning light will come on along with a message
or image shown on the multi-information display.
● “Antilock Brake System Malfunction Visit Your Dealer”:
The ABS warning light comes on. ( P. 660)
● “Braking Power Low Visit Your Dealer”:
The brake system warning light (yellow) will come on. ( P. 659)
● Indicates that a door is not fully closed while the vehicle is stopped.:
The Open door warning light comes on. ( P. 6 6 2 )
■ If “Visit Your Dealer” is shown
The system or part shown on the multi- information display is malfunctioning.
Have the vehicle inspected by any authorized Toyota retailer or Toyota autho-
rized repairer, or any reliable repairer.
■ If a message about an operation is shown
● If a message about an operation of the accelerator pedal or brake pedal is
shown
• A warning message about an operation of the brake pedal may be shown
while the driving assist systems such as PCS (Pre-Collision System) or
the dynamic radar cruise control with full-speed range is operating. If a
warning message is shown, be sure to decelerate the vehicle or follow an
instruction shown on the multi-information display.
• A warning message is shown when Brake Override System operates.
( P. 310, 673)
• A warning message is shown when Drive-Start Control or Parking Sup-
port Brake function (if equipped) operates ( P. 310, 468). Follow the
instructions on the multi-information display.
● If a message about an operation of the power switch is shown
An instruction for operation of the power switch is shown when the incorrect
procedure for starting the hybrid system is performed or the power switch is
operated incorrectly. Follow the instructions shown on the multi-information
display to operate the power switch again.
● If a message about a shift operation is shown
To prevent the shift position from being selected incorrectly or the vehicle
from moving unexpectedly, the shift position may be changed automatically
( P. 331) or shift operation may be required. In this case, change the shift
position following the instructions on the multi-information display.

6738-2. Steps to take in an emergency
Prius Plug-in Hybrid_OM_OM47F38E_(EE)
8
When trouble arises
■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 “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 check if the mes-
sage disappears.
■ If “Accelerator and Brake Pedals Pressed Simultaneously” is shown
The accelerator and brake pedals are being depressed simultaneously.
( P. 310)
Release the accelerator pedal and depress the brake pedal.
■ 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. 366, 659)
● PCS (Pre-Collision System)
● LTA (Lane Tracing Assist)
● AHS (Adaptive High-beam System)
● RSA (Road Sign Assist)
● Dynamic radar cruise control with full-speed range
■ If a message that indicates the malfunction of radar sensor is displayed
The following systems may be suspended until the problem shown in the
message is resolved. ( P. 366, 659)
● 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 shown
The dynamic radar cruise control with full-speed range system is suspended
temporarily or until the problem show n in the message is resolved. (causes
and coping methods: P. 366)
■ If “Radar Cruise Control Unavailable” is shown
The dynamic radar cruise control with full-speed range system cannot be
used temporarily. Use the system when it becomes available again.

745Alphabetical index
Prius Plug-in Hybrid_OM_OM47F38E_(EE)
Child-protectors ....................... 276
Cleaning............................ 566, 572
Aluminum wheels .................. 567
Exterior.................................. 566
Front camera......................... 358
Hybrid battery (traction
battery) air intake vent ........ 573
Interior ................................... 572
Radar sensor ........................ 357
Seat belts .............................. 575
Water-repellent coating ......... 567
Clock ......................................... 194
Adjustment ............................ 200
Coat hooks ............................... 563
Combination meter .................. 194
Clock adjustment .................. 200
Main display .......................... 212
Multi-information display ....... 220
Warning lights and
indicators ............................ 204
Condenser ................................ 593
Console box ............................. 545
Consumption screen ............... 264
Coolant ..................................... 591
Capacity ................................ 720
Checking ............................... 591
Preparing and checking
before winter....................... 516
Cooling system ........................ 591
Engine overheating ............... 705
Hybrid system overheating ... 707
Cruise control
Dynamic radar cruise control
with full-speed range .......... 401
Cup holders .............................. 546
Curtain shield airbags ............... 39
Customizable features ............ 726Daytime running light
system .................................... 338
Deck board ............................... 550
Defogger
Outside rear view mirrors...... 527
Rear window ......................... 527
Windshield ............................ 527
Dimension ................................ 714
Display
Drive information................... 222
Dynamic radar cruise control
with full-speed range .......... 401
Energy monitor ............. 223, 261
Head-up display .................... 254
LTA (Lane Tracing Assist) .... 388
Main display .......................... 212
Multi-information display ....... 220
Parking Support Brake
function ............................... 468
Pre-collision warning............. 369
RCTA detection screen......... 423
RSA (Road Sign Assist)........ 396
S-IPA (Simple Intelligent
Parking Assist System) ...... 477
Toyota parking assist
sensor................................. 451
Warning messages ............... 667
Do-it-yourself maintenance .... 581
Door courtesy lights................ 541
Location ................................ 541
Wattage ................................ 723D

746Alphabetical index
Prius Plug-in Hybrid_OM_OM47F38E_(EE)
Doors ................................ 273, 278
Back door .............................. 278
Door glasses ......................... 303
Door lock ............................... 273
Open door warning buzzer.... 276
Open door warning light ........ 662
Outside rear view mirrors ...... 301
Rear door child-protectors .... 276
Side doors ............................. 273
Side windows ........................ 303
Double locking system.............. 75
Drive information ..................... 222
Drive-Start Control (DSC)........ 309
Sudden start restraint
control................................. 309
Driver’s seat belt reminder
light ......................................... 662
Driving ...................................... 308
Break-in tips .......................... 311
Correct driving posture............ 32
Driving in the rain .................. 310
Driving mode select switch ... 418
Plug-in hybrid vehicle driving
tips ...................................... 105
Procedures............................ 308
Winter drive tips .................... 516
DSC (Drive-Start Control)........ 309
Sudden start restraint
control................................. 309
Dynamic radar cruise control
with full-speed range ............ 401
ECB (Electronically
Controlled Brake System) .... 509
Eco drive mode ........................ 418
Electric motor (traction
motor) ....................................... 84
Location .................................. 84
Specification.......................... 717Electric Power Steering
(EPS)....................................... 510
Function ................................ 510
Warning light ......................... 660
Electronic key .......................... 268
Battery-saving function ......... 285
If the electronic key does not
operate properly ................. 695
Replacing the battery ............ 632
Electronically Controlled
Brake System (ECB) ............. 509
Emergency, in case of
If a warning buzzer sounds ... 659
If a warning light turns on...... 659
If a warning message is
displayed ............................ 667
If the 12-volt battery is
discharged .......................... 699
If the electronic key does not
operate properly ................. 695
If the hybrid system will not
start .................................... 693
If the vehicle becomes
stuck ................................... 710
If the vehicle is submerged
or water on the road
is rising ............................... 650
If you have a flat tire ............. 675
If you lose your keys ..... 269, 272
If you think something is
wrong.................................. 658
If your vehicle has to be
stopped in an emergency ... 649
If your vehicle needs to be
towed .................................. 652
If your vehicle overheats ....... 705
E

751Alphabetical index
Prius Plug-in Hybrid_OM_OM47F38E_(EE)
Main display ............................. 212
Maintenance
Do-it-yourself maintenance ... 581
Maintenance data ................. 714
Maintenance requirements ... 578
Malfunction indicator lamp ..... 660
Master warning light ................ 667
Meter ......................................... 194
Clock adjustment .................. 200
Combination meter................ 194
Head-up display .................... 254
Indicators .............................. 206
Instrument cluster light
control................................. 196
Main display .......................... 212
Multi-information display ....... 220
Warning lights ....................... 205
Warning messages ............... 667
Microphone
*
Mirrors
Inside rear view mirror .......... 299
Outside rear view mirror
defoggers............................ 527
Outside rear view mirrors ...... 301
Vanity mirrors ........................ 555Multi-information display ........ 220
Air conditioning system
settings screen ................... 242
Audio system-linked
display ................................ 241
BSM (Blind Spot Monitor) ..... 423
Display contents ................... 220
Drive information................... 222
Driving assist system
information.......................... 246
Dynamic radar cruise control
with full-speed range .......... 401
Energy monitor ..................... 223
Language .............................. 250
LTA (Lane Tracing Assist) .... 388
Parking Support Brake
function ............................... 468
Pre-collision warning............. 369
RSA (Road Sign Assist)........ 396
S-IPA (Simple Intelligent
Parking Assist System) ...... 477
Settings ................................. 247
Toyota parking assist
sensor................................. 451
Warning message ................. 246
M
*: Refer to “Navigation system Owner’s manual”.