Honda Civic Coupe (2019 year). Instruction - part 33

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Lane Keeping Assist System (LKAS)

Driving

Lane Keeping Assist System (LKAS)

Provides steering input to help keep the vehicle in the middle of a detected lane and 
provides tactile and visual alerts if the vehicle is detected drifting out of its lane.

1

Lane Keeping Assist System (LKAS)

Important Safety Reminders
The LKAS is for your convenience only. It is not a 
substitute for your vehicle control. The system does 
not work if you take your hands off the steering 
wheel or fail to steer the vehicle.

2 Driver Information Interface Warning and 

Information Messages P. 95

Do not place objects on the instrument panel. 
Objects may reflect on the front windshield and 
prevent correct detection of the traffic lanes.

LKAS only alerts you when lane drift is detected 
without a turn signal in use. The LKAS may not detect 
all lane markings or lane departures; accuracy will 
vary based on weather, speed, and lane marker 
condition.
It is always your responsibility to safely operate the 
vehicle and avoid collisions.

The LKAS is convenient when it is used on freeways.

The LKAS may not work properly or may work 
improperly under the certain conditions:

2 LKAS Conditions and Limitations P. 517

You can read about handling information for the 
camera equipped with this system.

2 Front Sensor Camera P. 524

When you operate the turn signals to change lanes, the system is suspended, and 
resumes after the signals are off.
If you make a lane change without operating the turn signals, the LKAS alerts 
activate, and torque is applied to the steering.

■

Front Sensor 
Camera

Monitors the 
lane lines

■

Tactile and visual alerts

Rapid vibrations on the steering wheel 
and a warning display alert you that 
the vehicle is drifting out of a detected 
lane.

■

Steering input assist

The system applies torque to the steering to keep the vehicle between the left 
and right lane lines. The applied torque becomes stronger as the vehicle gets 
closer to either of the lane lines.

Continued

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Lane 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 Function

1

Lane Keeping Assist System (LKAS)

The LKAS may not function as designed while driving 
in frequent stop and go traffic, or on roads with 
sharp curves.

When it fails to detect lanes, the system will 
temporarily be canceled. When lane is detected, 
system will recover automatically.

■

Lane Departure Warning Function

Warning Area

Warning Area

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Lane Keeping Assist System (LKAS)

514

Driving

The system can be used when the following conditions are met.
• The lane in which you are driving has detectable 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 high speed operation.

■

How to activate the system

1. Press the MAIN button.

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The LKAS indicator comes on in the 
driver information interface.
The system is ready to use.

2. Press the LKAS button.

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Lane outlines appear on the driver 
information interface.
The system is activated.

■

When the System can be Used

1

When the System can be Used

If the vehicle drifts toward either the left or right lane 
line due to the system applying torque, turn off the 
LKAS and have your vehicle checked by a dealer.

MAIN Button

LKAS Button

Continued

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Lane Keeping Assist System (LKAS)

Driving

3. Keep your vehicle near the center of the 

lane while driving.

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The dotted outer lines change to solid 
ones once the system starts operating 
after detecting the left and right lane 
markings.

To cancel the LKAS:
Press the MAIN or LKAS button.

The LKAS is turned off every time you stop the 
engine, even if you turned it on the last time 
you drove the vehicle.

■

To Cancel

1

To Cancel

Pressing the MAIN button also turns ACC with LSF 
on and off.

Pressing the MAIN button also turns ACC on and off.

Models with ACC with LSF

Models with ACC

MAIN Button

LKAS Button

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Lane Keeping Assist System (LKAS)

Driving

■

The system operation is suspended if 
you:

• Set the wipers to HI.

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Turning the wipers off or setting it to LO 
resumes the LKAS.

• Set the wiper switch to AUTO and the 

wipers operate at high speed.

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The LKAS resumes when the wipers stop 
or operate at low speed.

• Decrease the vehicle speed to 40 mph (64 

km/h) or less.

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Increasing the vehicle speed to 45 mph 
(72 km/h) or more resumes the LKAS.

• Depress the brake pedal.

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The LKAS resumes and starts detecting 
the lane lines again once you release the 
brake pedal.

■

The LKAS may automatically be suspended when:

• The system fails to detect lane lines.
• The steering wheel is quickly turned.
• You fail to steer the vehicle.
• Driving through a sharp curve.
• Driving at a speed in excess of approximately 90 mph (145 km/h).
Once these conditions no longer exist, the LKAS automatically resumes.

When the LKAS is suspended, 
the lane lines on the driver 
information interface change to 
contour lines, and the beeper 
sounds (if activated).

Models with automatic intermittent wipers

All models

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Lane Keeping Assist System (LKAS)

Continued

Driving

■

The LKAS may automatically be canceled when:

• The camera temperature gets extremely high or low.
• The camera behind the rearview mirror, or the area around the camera, including 

the windshield, gets dirty.

• The ABS or VSA® systems engage.
A beeper sounds if the LKAS is automatically canceled.

The system may not detect lane markings and therefore may not keep the vehicle in 
the middle of a lane under certain conditions, including the following:

■

Environmental conditions

• Driving in bad weather (rain, fog, snow, etc.).
• Sudden changes between light and dark, such as an entrance or exit of a tunnel.
• There is little contrast between lane lines and the roadway surface.
• Driving into low sunlight (e.g., at dawn or dusk).
• Strong light is reflected onto the roadway.
• Driving in the shadows of trees, buildings, etc.
• Shadows of adjacent objects are parallel to lane markings.
• Roadway objects or structures are misinterpreted as lane markers.
• Reflections on the interior of the front windshield.
• Driving at night or in a dark condition such as a tunnel.

■

LKAS Conditions and Limitations

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Lane Keeping Assist System (LKAS)

Driving

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Roadway conditions

• Driving on a snowy or wet roadway (obscured lane marking, vehicle tracks, 

reflected lights, road spray, high contrast).

• Driving on a road with temporary lane markings.
• Faint, multiple, or varied lane markings are visible on the roadway due to road 

repairs or old lane markings.

• The roadway has merging, split, or crossing lines (e.g., such as at an intersection 

or crosswalk).

• The lane markings are extremely narrow, wide, or changing.

• The vehicle in front of you is driving near the lane lines.
• The road is hilly or the vehicle is approaching the crest of a hill.
• Driving on rough or unpaved roads, or over bumpy surfaces.

Faded lines

Duplicate lines

Tire tracks

Very wide or narrow traffic lane

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Lane Keeping Assist System (LKAS)

Driving

• When objects on the road (curb, guard rail, pylons, etc.) are recognized as white 

lines (or yellow lines).

• Driving on roads with double lines.

■

Vehicle conditions

• Headlight lenses are dirty or the headlights are not properly adjusted.
• The outside of the windshield is streaked or blocked by dirt, mud, leaves, wet 

snow, etc.

• The inside of the windshield is fogged.
• The camera temperature gets too high.
• An abnormal tire or wheel condition (wrong size, varied size or construction, 

improperly inflated, compact spare tire, etc.).

• The vehicle is tilted due to a heavy load or suspension modifications.

Lane void of lines at junction

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Road Departure Mitigation (RDM) System

Driving

Road Departure Mitigation (RDM) System

Alerts and helps to assist you when the system detects a possibility of your vehicle 
unintentionally crossing over detected lane markings and/or leaving the roadway 
altogether.

The front camera behind the rearview mirror 
monitors left and right lane markings (in white 
or yellow). If your vehicle is getting too close to 
detected lane markings without a turn signal 
activated, the system, in addition to a visual 
alert, applies steering torque and alerts you 
with rapid vibrations on the steering wheel, to 
help you remain within the detected lane.

2 Customized Features P. 124, 335

As a visual alert, the Lane Departure 
message appears on the driver information 
interface.

If the system determines that its steering input 
is insufficient to keep your vehicle on the 
roadway, it may apply braking.

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Braking is applied only when the lane 
markings are solid continuous lines.

The system cancels assisting operations when you turn the steering wheel to avoid 
crossing over detected lane markings.

If the system operates several times without detecting driver response, the system 
beeps to alert you.

■

How the System Works

1

Road Departure Mitigation (RDM) System

Important Safety Reminder
Like all assistance systems, the RDM system has 
limitations.
Over-reliance on the RDM system may result in a 
collision. It is always your responsibility to keep the 
vehicle within your driving lane.

The RDM system only alerts you when lane drift is 
detected without a turn signal in use. The RDM 
system may not detect all lane markings or lane or 
roadway departures; accuracy will vary based on 
weather, speed and lane marker condition. It is 
always your responsibility to safely operate the 
vehicle and avoid collisions.

You can read about handling information for the 
camera equipped with this system.

2 Front Sensor Camera P. 524

The RDM system may not work properly or may work 
improperly under the certain conditions:

2 RDM Conditions and Limitations P. 522

There are times when you may not notice RDM 
functions due to your operation of the vehicle, or 
road surface conditions.

Continued

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Road Departure Mitigation (RDM) System

Driving

The system becomes ready to start searching 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 the driver is not actively accelerating, 

braking or steering.

Press the RDM button to turn the system on 
and off.

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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

1

How the System Activates

The RDM system may automatically shut off and the 

 indicator comes and stays on.

2 Indicators P. 76

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 driver information 
interface or audio/information screen, the system 
does not operate the steering wheel and braking.

2 Customized Features P. 124, 335

The indicators for the Adaptive Cruise Control 
(ACC)

*

, Adaptive Cruise Control (ACC) with Low 

Speed Follow (LSF)

*

, Road Departure Mitigation 

(RDM), Vehicle Stability Assist® (VSA®) system, 
Vehicle Stability Assist® (VSA®) OFF, Low Tire 
Pressure/TPMS

*

 and Collision Mitigation Braking 

System

TM

 (CMBS

TM

) may come on after re-connecting 

the battery. Drive a short distance at more than 12 
mph (20 km/h). The indicators should go off. If they 
do not, have your vehicle checked by a dealer.

RDM Button

Indicator

* Not available on all models

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Road Departure Mitigation (RDM) System

Driving

The system may not properly detect lane markings and the position of your vehicle 
under certain conditions. Some examples of these conditions are listed below.

■

Environmental conditions

• Driving in bad weather (rain, fog, snow, etc.).
• Sudden changes between light and dark, such as an entrance or exit of a tunnel.
• There is little contrast between lane lines and the roadway surface.
• Driving into low sunlight (e.g., at dawn or dusk).
• Strong light is reflected onto the roadway.
• Driving in the shadows of trees, buildings, etc.
• Shadows of adjacent objects are parallel to lane markings.
• Roadway objects or structures are misinterpreted as lane markers.
• Reflections on the interior of the windshield.
• Driving at night or in a dark condition such as a tunnel.

■

RDM Conditions and Limitations

523

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Road Departure Mitigation (RDM) System

Driving

■

Roadway conditions

• Driving on a snowy or wet roadway (obscured lane marking, vehicle tracks, 

reflected lights, road spray, high contrast).

• Driving on a road with temporary lane markings.
• Faint, multiple, or varied lane markings are visible on the roadway due to road 

repairs or old lane markings.

• The roadway has merging, split, or crossing lines (e.g., such as at an intersection 

or crosswalk).

• The lane markings are extremely narrow, wide, or changing.
• The vehicle in front of you is driving near the lane lines.
• The road is hilly or the vehicle is approaching the crest of a hill.
• Driving on rough or unpaved roads, or over bumpy surfaces.
• When objects on the road (curb, guard rail, pylons, etc.) are recognized as white 

lines (or yellow lines).

• Driving on roads with double lines.

■

Vehicle conditions

• Headlight lenses are dirty or the headlights are not properly adjusted.
• The outside of the windshield is streaked or blocked by dirt, mud, leaves, wet 

snow, etc.

• The inside of the windshield is fogged.
• The camera temperature gets too high.
• An abnormal tire or wheel condition (wrong sized, varied size or construction, 

improperly inflated, compact spare tire, etc.).

• The vehicle is tilted due to a heavy load or suspension modifications.
• When tire chains are installed.

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Front Sensor Camera

Driving

Front Sensor Camera

The camera, used in systems such as LKAS, RDM, ACC

*

, ACC with LSF

*

, and 

CMBS

TM

, is designed to detect an object that triggers any of the systems to operate 

its functions.

This camera is located behind the rearview 
mirror.

To help reduce the likelihood that high interior 
temperatures will cause the camera’s sensing 
system to shut off, when parking, find a shady 
area or face the front of the vehicle away from 
the sun. If you use a reflective sun shade, do 
not allow it to cover the camera housing. 
Covering the camera can concentrate heat on 
it.

■

Camera Location and Handling Tips

1

Front Sensor Camera

Never apply a film or attach any objects to the 
windshield, the hood, or the front grille that could 
obstruct the camera’s field of vision and cause the 
system to operate abnormally.
Scratches, nicks, and other damage to the windshield 
within the camera’s field of vision can cause the 
system to operate abnormally. If this occurs, we 
recommend that you replace the windshield with a 
genuine Honda replacement windshield. Making 
even minor repairs within the camera’s field of vision 
or installing an aftermarket replacement windshield 
may also cause the system to operate abnormally.
After replacing the windshield, have a dealer 
recalibrate the camera. Proper calibration of the 
camera is necessary for the system to operate 
properly.

Do not place an object on the top of the instrument 
panel. It may reflect onto the windshield and prevent 
the system from detecting lane lines properly.

Front Sensor 
Camera

* Not available on all models

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Front Sensor Camera

Driving

1

Front Sensor Camera

If the Some Driver Assist Systems Cannot 
Operate: Camera Temperature Too High message 
appears:

•

Use the climate control system to cool down the 
interior and, if necessary, also use defroster mode 
with the airflow directed toward the camera.

•

Start driving the vehicle to lower the windshield 
temperature, which cools down the area around 
the camera.

If the Some Driver Assist Systems Cannot 
Operate: Clean Front Windshield message 
appears:

•

Park your vehicle in a safe place, and clean the 
windshield. If the message does not disappear after 
you have cleaned the windshield and driven for a 
while, have your vehicle checked by a dealer.

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Radar Sensor

Driving

Radar Sensor

The radar sensor is in the lower bumper.

1

Radar Sensor

Avoid strong impacts to the radar sensor cover.

For the CMBS to work properly:

•

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 sensor cover is strongly 
impacted, turn off the system by using the CMBS OFF 
button and take your vehicle to a dealer.

2 CMBS

TM

 On and Off P. 475

If the vehicle is involved in any of the following 
situations, the radar sensor may not work properly. 
Have your vehicle checked by a dealer:

•

Your vehicle is involved in a frontal collision.

•

Your vehicle drives through deep water or is 
submerged in deep water.

•

Your vehicle strongly strikes a bump, curb, chock, 
or embankment that could jar the radar sensor.

Radar Sensor

The radar sensor is in 
the lower bumper.

527

Continued

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 ignition switch

*1

 is in.

Pull the electric parking brake switch up gently 
and securely.

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The indicator in the switch comes on.

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The parking brake and brake system 
indicator (red) comes on.

■

To release

The ignition switch must be ON 

(

w

*1

 in order 

to release the electric parking brake.
1. Depress the brake pedal.
2. Press the electric parking brake switch.

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The indicator in the switch goes off.

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The parking brake and brake system 
indicator (red) goes off.

Manually releasing the parking brake using 
the switch helps your vehicle start slowly and 
smoothly when facing down hill on steep hills.

*1: Models with the smart entry system have an ENGINE START/STOP button instead of an 
ignition switch.

■

Parking Brake

1

Parking Brake

You may hear the electric parking brake system 
motor operating from the rear wheel area when you 
apply or release the parking brake. This is normal.

The brake pedal may slightly move due to the electric 
parking brake system operation when you apply or 
release the parking brake. This is normal.

You cannot apply or release the parking brake if the 
12-volt battery goes dead.

2 Jump Starting P. 629

If you pull up and hold the electric parking brake 
switch while driving, the brakes on all four wheels 
are applied by the VSA® system until the vehicle 
comes to a stop. The electric parking brake then 
applies, and the switch should be released.

In the following situations, the parking brake 
automatically operates.

•

When your vehicle is stopped with the automatic 
brake hold system activated for more than 10 
minutes.

•

When the driver’s seat belt is unfastened while 
your vehicle is stopped and the brake hold system 
is applied.

•

When the engine is turned off while the brake hold 
system is applied.

•

When there is a problem with the brake hold 
system while brake hold is applied.

•

When your vehicle is stopped for more than 10 
minutes while ACC with LSF is activated.

Models with ACC with LSF

Electric Parking 
Brake Switch

Electric Parking 
Brake Switch