
uuWhen Driving uAdaptive Cruise Control (ACC) with Low Speed Follow (LSF)
408
Driving
The system may automatically shut off and the  ACC indicator will come on under 
certain conditions. Some examples of th ese conditions are listed below. Other 
conditions may reduce some of the ACC functions.
2 Front Sensor Camera  P. 396
■Environmental conditions
Driving in bad weather (r ain, fog, snow, etc.).
■Roadway conditions
Driving on a snowy or wet roadway (obscure d lane marking, vehicle tracks, reflected 
lights, road spray,  high contrast).
■Vehicle conditions
• The outside of the windshie ld is blocked by dirt, mud, leaves, wet snow, etc.
• An abnormal tire or wheel condition (Wrong sized, varied size or construction, 
improperly inflated tire, etc.).
• The camera temperature gets too high.
• The parking brake is applied.
• When the front grille is dirty.
• The vehicle is tilted due to a heav y load or suspension modifications.
• When tire chains are installed.
■ACC with LSF Conditions and Limitations1ACC with LSF Conditions and Limitations
The radar sensor for ACC with LSF is shared with the 
collision mitigation braking system
TM (CMBSTM).
2 Collision Mitigation Braking SystemTM 
(CMBSTM)  P. 442
You can read about handling information for the 
camera equipped with this system. 2 Front Sensor Camera  P. 396
Always keep the radar sensor cover clean.
Never use chemical solvents or polishing powder for 
cleaning the sensor cover.  Clean it with water or a 
mild detergent.
Do not put a sticker on the radar sensor cover or 
replace the radar sensor cover.
If you need the radar sensor to be repaired, or 
removed, or the radar se nsor cover is strongly 
impacted, turn off the system by pressing the  MAIN 
button and take your vehicl e to an authorized Honda 
Clarity Plug-In Hybrid dealer.
Have your vehicle checked  by an authorized Honda 
Clarity Plug-In Hybrid deal er if you find any unusual 
behavior of the system  (e.g., the warning message 
appears too frequently).
19 CLARITY PHEV-31TRW6100.book  408 ページ  2018年10月25日 木曜日 午後2時29分 

uuWhen Driving uLane Keeping Assist System (LKAS)
420
Driving
The system can be used when  the following conditions are met.
• The lane in which you are driving has dete ctable lane markers on both sides, and 
your vehicle is in the center of the lane.
• The vehicle speed is between 45 and 90 mph (72 and 145 km/h).
• You are driving on a straight or slightly curved road.
• The turn signals are off.
• The brake pedal is not depressed.
• The wipers are not in continuous operation.
■How to activate the system
1.Press the  MAIN button.
u The LKAS (green) is on in the driver 
information interface.
The system is ready to use.
2. Press the LKAS button.
u Lane outlines appear on the driver 
information interface.
The system is activated.
■When the System can be Used1When the System can be Used
If the vehicle drifts toward ei th e r l ef t o r r ight lane line 
due to the system applying torque, turn off the LKAS 
and have your vehicle checked by an authorized 
Honda Clarity Plug-In  Hybrid dealer.
MAIN Button
LKAS Button
19 CLARITY PHEV-31TRW6100.book  420 ページ  2018年10月25日 木曜日 午後2時29分 

427
uuWhen Driving uAgile Handling Assist
Driving
Agile Handling Assist
Lightly brakes each of the front and rear  wheels, as needed, when you turn the 
steering wheel, and helps support the vehi cle’s stability and performance during 
cornering.1 Agile Handling Assist
The agile handling assist ca nnot enhance stability in 
all driving situations. You still need to drive and 
corner at speeds  appropriate for the conditions and 
always leave a sufficient margin of safety.
When the VSA ® system indicator comes on and stays 
on while driving, the agil e handling assist does not 
activate.
You may hear a sound coming from the engine 
compartment while the agile handling assist is 
activated. This is normal.
19 CLARITY PHEV-31TRW6100.book  427 ページ  2018年10月25日 木曜日 午後2時29分 

434
Driving
Braking
Brake System
Use the parking brake to keep the vehicle stationary when parked. When the 
parking brake is applied, you can manually or automatically release it.
■To apply
The electric parking brake can be applied any 
time the vehicle has battery, no matter which 
position the power mode is in.
Pull the electric parkin g brake switch up gently 
and securely.
u The parking brake and brake system 
indicator (red) comes on.
■To release
The power mode must be in ON in order to 
release the electric parking brake.
1. Depress the brake pedal.
2. Press the electric parking brake switch.
u The parking brake and brake system 
indicator (red) goes off.
Manually releasing the parking brake using 
the switch helps your ve hicle start slowly and 
smoothly when facing down hill on steep hills.
■Parking Brake1 Brake System
When you depress the brak e pedal, you may hear a 
whirling sound from the engine  compartment. This is 
because the brake system is  in operation, and it is 
normal.
1 Parking Brake
You may hear the electric parking brake system 
motor operating from the re ar wheel area when you 
apply or release the parki ng brake. This is normal.
The brake pedal may slightly  move due to the electric 
parking brake system opera tion when you apply or 
release the parking br ake. This is normal.
You cannot apply or  release the parking brake if the 
12-volt battery goes dead. 2 Jump Starting  P. 541
If you pull up and hold the electric parking brake 
switch while driving, the brakes on all four 
wheels are applied by the electric servo brake 
system until the vehicle comes to a stop. The 
electric parking brake then applies, and the 
switch should be released.
Electric Parking 
Brake Switch
Electric Parking 
Brake Switch
19 CLARITY PHEV-31TRW6100.book  434 ページ  2018年10月25日 木曜日 午後2時29分 

uuBraking uBrake System
436
Driving
Your vehicle is equipped with disc brakes at all four wh eels. The brake assist system 
increases the stopping force when you  depress the brake pedal hard in an 
emergency situation. The an ti-lock brake system (ABS) helps you retain steering 
control when braking very hard.
2 Brake Assist System  P. 441
2 Anti-lock Brake System (ABS)  P. 440
■Foot Brake1Foot Brake
Check the brakes after driving through deep water, 
or if there is a buildup of  road surface water. If 
necessary, dry the brakes by  lightly depressing the 
pedal several times.
If you hear a continuous me tallic friction sound when 
applying the brakes, this is  caused by the brake wear 
indicator rubbing on the  brake rotor and indicates 
that the brake pads need to be replaced. Have the 
vehicle checked by an aut horized Honda Clarity Plug-
In Hybrid dealer. If you  hear only an occasional 
squeak or squeal when y ou initially apply the brake 
pedal, this may be normal and caused by high 
frequency vibration of th e brake pads against the 
rotating brake disc.
19 CLARITY PHEV-31TRW6100.book  436 ページ  2018年10月25日 木曜日 午後2時29分 

Continued437
uuBraking uBrake System
Driving
1Foot Brake
Applying constant pressure  to the brakes while going 
down a long hill can cause  the brakes to heat up, 
resulting in a loss of stopping power. Therefore, 
when descending a long hill , release the accelerator 
pedal and allow regenerati ve braking to slow the 
vehicle down. To adjust the  rate of deceleration, use 
the deceleration  paddle selector.
When the high voltage  battery is recharging, 
regenerative braking  may not be possible.
2 POWER/CHARGE Gauge  P. 122
2 High Voltage Battery Charge Level Gauge  
P. 123
2 Deceleration Paddle Selector  P. 392
Do not rest your foot  on the brake pedal while 
driving, as it will lightly  apply the brakes and cause 
them to lose effectiveness  over time and reduce pad 
life. It will also conf use drivers behind you.
19 CLARITY PHEV-31TRW6100.book  437 ページ  2018年10月25日 木曜日 午後2時29分 

uuBraking uBrake System
438
Driving
Keeps the brake applied after releasing the br ake pedal until the accelerator pedal is 
pressed. You can use this system while th e vehicle is temporarily stopped, like at 
traffic lights and in heavy traffic.
■Automatic Brake Hold1 Automatic Brake Hold
3WARNING
Activating the automatic brake hold system 
on steep hills or slippery roads may still 
allow the vehicle to  move if you remove 
your foot from the brake pedal.
If a vehicle unexpectedly moves, it may 
cause a crash resulting in serious injury or 
death.
Never activate the automatic brake hold 
system or rely on it  to keep a vehicle from 
moving when stopped on a steep hill or 
slippery roads.
3WARNING
Using the automatic brake hold system to 
park the vehicle may result in the vehicle 
unexpectedly moving.
If a vehicle moves unexpectedly, it may 
cause a crash, resulting in serious injury or 
death.
Never leave the vehicle when braking is 
temporarily kept by automatic brake hold 
and always park the vehicle by putting the 
transmission in 
( P and applying the parking 
brake.
■Turning on the system
Fasten your seat belt 
properly, then start the 
power system. Press the 
automatic brake hold 
button.
●The automatic brake 
hold system indicator 
comes on. The system 
is turned on.
■Activating the system
Depress the brake pedal 
to come to a complete 
stop. The transmission 
must be in 
( D or (N.●The automatic brake 
hold indicator comes 
on. Braking is kept for 
up to 10 minutes.
●Release the brake 
pedal after the 
automatic brake hold 
indicator comes on.
■Canceling the system
Depress the accelerator 
pedal while the 
transmission is in 
( D. 
The system is canceled 
and the vehicle starts to 
move.
●The automatic brake 
hold indicator goes 
off. The system 
continues to be on.
Accelerator PedalBrake PedalAutomatic Brake 
Hold Button
Goes 
Off
Comes 
OnOn On
Comes 
On
Comes 
On
U.S.
Canada
19 CLARITY PHEV-31TRW6100.book  438 ページ  2018年10月25日 木曜日 午後2時29分 

447
uuBraking uCollision Mitigation Braking SystemTM (CMBSTM)
Continued
Driving
■Vehicle conditions
• Headlight lenses are dirty or the h eadlights are not properly adjusted.
• The outside of the windshield is blocked by dirt, mud, leaves, wet snow, etc.
• The inside of the windshield is fogged.
• An abnormal tire or wheel condition (wro ng sized, varied size or construction, 
improperly inflated tire, etc.).
• When tire chains are installed.
• The vehicle is tilted due to a heavy load or  suspension modifications.
• The camera temperature gets too high.
• Driving with the parking brake applied.
• When the radar sensor in the front grille gets dirty.
■Detection limitations
• A vehicle or pedestrian suddenly crosses in front of you.
• The distance between your vehicle and the  vehicle or pedestrian ahead of you is 
too short.
• A vehicle cuts in front of you at a  slow speed, and it brakes suddenly.
• When you accelerate rapidly and approach  the vehicle or pedestrian ahead of you 
at high speed.
• The vehicle ahead of you is a motorcycle,  bicycle, mobility scooter or other small 
vehicle.
• When there are animals in front of your vehicle.
• When you drive on a curved, winding or und ulating road that makes it difficult for 
the sensor to properly detect a vehicle in front of you.
• The speed difference between your vehicle an d a vehicle or pedestrian in front of 
you is significantly large.
• An oncoming vehicle suddenly comes in front of you.
• Another vehicle suddenly comes in front of you at an intersection, etc.
• Your vehicle abruptly crosses over in front of an oncoming vehicle.
• When driving through a narrow iron bridge.
• When the lead vehicl e suddenly slows down.
19 CLARITY PHEV-31TRW6100.book  447 ページ  2018年10月25日 木曜日 午後2時29分