
uuWhen Driving uRoad Departure Mitigation (RDM) System
386
Driving
The system becomes ready to start sear ching for lane markings when all the 
following conditions are met:
• The vehicle is traveling between about 45 and 90 mph (72 and 145 km/h).
• The vehicle is 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.
• The vehicle is not accelerating or braking, and the steering wheel is not being 
turned.
• The system makes a determination that th e driver is not actively accelerating, 
braking or steering.
Press the RDM button to turn the system on 
and off.u The indicator in the button comes on and 
the message appears on the driver 
information interface when the system is 
on.
■How the System Activates
■RDM On and Off
1How the System Activates
The RDM system may automa tically shut off and the 
 indicator comes and stays on.
2 Indicators P. 82
RDM system function can  be impacted when the 
vehicle is:
•Not driven within a traffic lane.•Driven on the inside edge of a curve, or outside of 
a lane.
•Driven in a narrow lane.
1 RDM On and Off
When you have selected Warning Only  from the 
customized options using the audio/information 
screen, the system does not operate the steering 
wheel and braking.
RDM Button
Indicator
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389
uuWhen Driving uAdaptive Cruise Control (ACC) with Low Speed Follow (LSF)
Continued
Driving
Adaptive Cruise Control (ACC) with Low Speed 
Follow (LSF)
Helps maintain a constant vehicle speed an d a set following-interval behind a vehicle 
detected ahead of yours and, if the detect ed vehicle comes to a stop, can decelerate 
and stop your ve hicle, without you having to keep your foot on the brake or the 
accelerator.
When ACC with LSF slows your vehicle by  applying the brakes, your vehicle's brake 
lights will illuminate.
1 Adaptive Cruise Control (ACC)  with Low Speed Follow (LSF)
Important Reminder
As with any system, there are limits to ACC with LSF. 
Use the brake pedal whenever necessary, and always 
keep a safe interval betw een your vehicle and other 
vehicles.
Be careful not to severely  impact the radar sensor 
cover.
3WARNING
Improper use of ACC wi th LSF can lead to a 
crash.
Use ACC with LSF only when driving on 
expressways or freeways and in good 
weather conditions.
3WARNING
ACC with LSF has limite d braking capability 
and may not stop your vehicle in time to 
avoid a collision with a vehicle that quickly 
stops in front of you.
Always be prepared to apply the brake 
pedal if the conditions require.
When to use
■Vehicle speed for ACC with LSF: A vehicle is detected ahead within ACC with LSF 
range – ACC with LSF operates at speeds up to 90 mph (145 km/h).
No vehicle is detected within ACC with LSF range – ACC with LSF operates at the 
speed of 25 mph (40 km/h) or above.
■Gear position for ACC with LSF: In ( D. The radar sensor is 
behind the emblem.
The camera is 
located behind 
the rearview 
mirror.
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Continued405
uuWhen Driving uLane Keeping Assist System (LKAS)
Driving
Provides assistance to keep the vehicle in  the center of the lane, when the vehicle 
nears a white or yellow line, steering force of the electric power steering will become 
stronger.
When the vehicle enters the warning area,  the LKAS alerts you with slight steering 
wheel vibration as well as a warning display.
■Lane Keep Support Function1 Lane Keeping Assist System (LKAS)
When it fails to detect lanes, the system will 
temporarily be canceled. When a lane is detected, the 
system will recover automatically.
■Lane Departure Warning Function
Warning Area
Warning Area
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418
uuWhen Driving uLaneWatchTM
Driving
LaneWatchTM
LaneWatch is an assistance system that allows you to check the passenger side rear 
areas displayed on the audio/information screen  when the turn signal is activated to 
the passenger’s side. A camera in the pass enger side door mirror monitors these 
areas and allows you to chec k for vehicles, in addition to your visual check and use 
of the passenger door mirror. You can also keep the system on for your convenience 
while driving.1 LaneWatchTM
Important Safety Reminder
Like all assistance systems, LaneWatch has 
limitations. Over reliance on LaneWatch may result in 
a collision.
The LaneWatch function can be  affected by weather, 
lighting (including headli ghts and low sun angle), 
ambient darkness, camera  condition, and loading.
The LaneWatch may not prov ide the intended display 
of traffic to the side and rear under the following 
conditions:
•Your vehicle’s suspensi on has been altered, 
changing the height of the vehicle.
•Your tires are over or under inflated.•Your tires or wheels are of varied size or 
construction.
3WARNING
Failure to visually confirm that it is safe to 
change lanes before doing so may result in 
a crash and serious  injury or death.
Do not rely only on LaneWatch while 
driving.
Always look in your mi rrors, to either side 
of your vehicle, and behind you for other 
vehicles before changing lanes.
12
Camera
Move the turn signal 
lever to the passenger 
side.
Press the LaneWatch 
button.The passenger side view 
display appears on the 
audio/information screen.
The system activates when you:
The system deactivates when you press 
the LaneWatch button again.
Audio/Information Screen
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uuBraking uBrake System
424
Driving
Keeps the brake applied after releasing the brake pedal until the accelerator pedal is 
pressed. You can use this system while the vehicle is temporarily stopped, like at 
traffic lights and in heavy traffic.
■Automatic Brake Hold1Automatic 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 
On
Comes 
OnOnOn
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430
uuBraking uCollision Mitigation Braking SystemTM (CMBSTM)
Driving
The system has three alert stages for a possible collis ion. However, depending on circumstances, the CMBSTM may not go through all of 
the stages before initiating the last stage.
■Collision Alert Stages
Distance between vehicles
CMBSTM
The sensor detects a  vehicleAudible & Visual WARNINGSSteering WheelBraking
Stage oneThere is a risk of a 
collision with the 
vehicle ahead of you.
When in  Long, visual and 
audible alerts come on at a 
longer distance from a vehicle 
ahead than in  Normal setting, 
and in  Short, at a shorter 
distance than in  Normal.
In case of an 
oncoming vehicle 
detected, rapid 
vibration is provided.
—
Stage 
twoThe risk of a collision 
has increased, time to 
respond is reduced.
Visual and audible alerts.—
Lightly 
applied
Stage  three 
The CMBSTM 
determines that a 
collision is 
unavoidable.
Forcefully  applied
Your Vehicle Vehicle 
Ahead
Short
LongNormal
Your 
Vehicle Vehicle 
Ahead
Your 
VehicleVehicle 
Ahead
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498
Handling the Unexpected
If a Tire Goes Flat
Temporarily Repairing a Flat Tire
If the tire has a large cut or is otherwise severely damaged, you will need to have the 
vehicle towed. If the tire only has a smal l puncture, from a nail for instance, you can 
use the temporary tire repair kit so that  you can drive to the nearest service station 
for a more permanent repair.
If a tire goes flat while driving, grasp  the steering wheel firmly, and brake gradually 
to reduce speed. Then stop in a safe place.
1. Park the vehicle on a firm, level, and non-slippery surface and apply the parking 
brake.
2. Change the gear position to 
(P.
3. Turn on the hazard warning lights an d set the power mode to VEHICLE OFF 
(LOCK).
1 Temporarily Repairing a Flat Tire
The kit should not be used in  the following situations. 
Instead, contact an authorized Honda Clarity Electric 
dealer or a roadside assistance to have the vehicle 
towed.
•The tire sealant has expired.•More than one tire is punctured.
•The puncture or cut is larger than 3/16 inch (4 mm).
•The tire side wall is da maged or the puncture is 
outside the contact area.
•Damage has been caused by  driving with the tires 
extremely under inflated.
•The tire bead is no longer seated.•The rim is damaged.
Do not remove a nail or  screw that punctured the 
tire. If you remove it from  the tire, you may not be 
able to repair the puncture using the kit.
When the puncture is:Kit Use
Smaller than 3/16 inch  (4 mm)Yes
Larger than 3/16 inch 
(4 mm)No
Contact 
Area
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511
Handling the Unexpected
Power System Won’t Start
Checking the Procedure
When the READY indicator does not come on and the  Ready To Drive message 
does not appear on the driver informatio n interface, check the following items and 
take appropriate action.
ChecklistConditionWhat to Do
Check if the related 
indicator or driver 
information interface 
messages come on.The  Remove Charger Connector  message appearsRemoving a charge connector. Set the power 
mode to ACCESSORY, then to ON.
The Low Battery Charge . Power Reduced. message appearsCharge the High Voltage battery.
2Charging  P. 440
The Temperature Is Too Cold For Vehicle To Operate  
message appears.2 Driver Information Interface Warning and 
Information Messages  P. 100
The To Start, Hold Remote Near Start Button  message 
appears.
u Make sure the smart entry remote is in its operating range.
2 POWER Button Operating Range  P. 152
2If the Smart Entry Remote Battery is Weak 
P. 512
The  POWER SYSTEM  indicator comes on.Have your vehicle checked by an authorized 
Honda Clarity Electric dealer.
The transmission system indicator blinks and  Transmission 
Problem Apply Parking  Brake When Parked message 
appears.The power system can be activated as a 
temporary measure.
2 If the Transmission System Indicator Blinks 
along with the Warning Message P. 523
Check the brightness 
of the interior lights. The interior lights are dim or do not come on at
 all. Have the 12-volt battery checked by an 
authorized Honda Clarity Electric dealer.
The  interior  lights  come  on  normally. Check all fuses, or have your vehicle checked by  an authorized Honda Clarity Electric dealer.
2Inspecting and Changing Fuses P. 530
Check the Security 
System Alarm 
indicator.When the Security System Alarm in dicator is blinking, the power 
system cannot be turned on.
2 Security System Alarm  P. 147
1Checking the Procedure
If you must start the vehi cle immediately, use an 
assisting vehicle or booster  battery to jump start it.
2 Jump Starting  P. 514
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