2021 HONDA RIDGELINE Owner's Manual (in English)

uuHonda Sensing ®u Adaptive Cruise Control (ACC)
440
Driving
Take your foot off the pedal and press down the –/SET button when you reach the
desired speed. The moment you release the –/SET button, the set speed is fixed, and
ACC begins.
When ACC starts operating, the vehicle icon,
interval bars and set speed appear on the
multi-information display.
■To Set the Vehicle Speed1 Adaptive Cruise Control (ACC)
ACC may not work properly under certain conditions.
2 ACC Conditions and Limitations P. 443
When not using ACC: Turn off adaptive cruise by
pressing the MAIN button. This also will turn off the
Lane Keeping Assist System (LKAS).
When the MAIN button is pressed, both ACC and
the Lane Keeping Assist System (LKAS) are either
turned on or off.
Do not use ACC under the following conditions:
•On roads with heavy traf fic or while driving in
continuous stop and go traffic.
•On roads with sharp turns.
•On roads with steep downhill sections, as the set
vehicle speed can be exceeded by coasting. In such
cases, ACC will not apply the brakes to maintain
the set speed.
•On roads with toll collection facilities or other
objects between lanes of traffic, or in parking
areas, or faci lities with driv e through access.
You can switch the displayed set speed
measurements on the audio/information screen
between mph and km/h. 2 Customized Features P. 298
On when ACC
begins
Press and release–/SET
Button
Set Vehicle
Interval
Set Vehicle
Speed

Continued441
uuHonda Sensing ®u Adaptive Cruise Control (ACC)
Driving
■There is a vehicle ahead
ACC monitors if a vehicle ahead of you ente rs the ACC range. If a vehicle is detected
doing so, the ACC system maintains or decele rates your vehicle’s set speed in order
to keep the vehicle’s set followi ng-interval from the vehicle ahead.
2To Set or Change Following-interval P. 446
■When in Operation1When in Operation
If the vehicle detected ahead of you slows down
abruptly, or if a nother vehicle is de tected cutting in
front of you, the beep er sounds and a message
appears on the multi-information display.
Depress the brake pedal, and keep an appropriate
interval from the vehicle ahead.
Beep
ACC Range: 394 ft. (120 m)

uuHonda Sensing ®u Adaptive Cruise Control (ACC)
442
Driving
When a vehicle whose sp eed is slower than
your set speed is detected in front of you, your
vehicle starts to slow down.
■There is no vehicle ahead Your vehicle maintains the set speed without
having to keep your foot on the brake or
accelerator pedal.
If there previously was a vehicle detected
ahead that kept your vehicle from traveling at
the set speed, ACC accelerates your vehicle to
the set speed, and then maintains it.
■When you depress the accelerator pedal
You can temporarily increase th e vehicle speed. In this case, there is no audible or
visual alert even if a ve hicle is in the ACC range.
ACC stays on unless you cancel it. Once you release the accelerator pedal, the
system resumes an appropriate speed for keeping the following-interval while a
vehicle ahead is within the ACC range.
1 When in Operation
Even if the interval betw een your vehicle and the
vehicle detected ahead is short, ACC may start
accelerating your vehi cle under the following
circumstances:
•The vehicle ahead of you is going at almost the
same speed as, or faster than, your vehicle.
•A vehicle that cuts in front of you is going faster
than your vehicle, gradua lly increasing the interval
between the vehicles.
You can also set the system to beep when a vehicle in
front of you comes in and goes out of the ACC
detecting range. Change the ACC Forward Vehicle
Detect Beep setting.
2 Customized Features P. 298
Limitations
You may need to use the brake to maintain a safe
interval when using ACC. Additionally, ACC may not
work properly under certain conditions.
2 ACC Conditions and Limitations P. 443A vehicle icon appears on
the multi-information
display.
A vehicle icon with dotted-line
contour appears on the multi-
information display.

Continued443
uuHonda Sensing ®u Adaptive Cruise Control (ACC)
Driving
The system may automatically shut off and the ACC indicator will come on under
certain conditions. Some examples of these conditions are listed below. Other
conditions may reduce some of the ACC functions.
2 Front Sensor Camera P. 465
2 Radar Sensor P. 467
■Environmental conditions
Driving in bad weather (r ain, fog, snow, etc.).
■Roadway conditions
Driving on a snowy or wet roadway (obscured lane marking, vehicle tracks, reflected
lights, road spra y, high contrast).
■Vehicle conditions
• The outside of the windshield is blocked by dirt, mud, leaves, wet snow, etc.
• An abnormal tire or wheel condition (wrong size, varied size or construction,
improperly inflated, co mpact spare tire, etc.).
• The camera temperature gets too high.
• The parking brake is applied.
• The front grille is dirty.
• The vehicle is tilted due to a heavy load or suspension modifications.
• Tire chains are installed.
• The vehicle is towing a trailer.
■ACC Conditions and Limitations1ACC Conditions and Limitations
If you need the radar sensor to be repaired, or
removed, or the front grille is strongly impacted, turn
off the system by pressing the MAIN button and take
your vehicle to a dealer.
Have your vehicle checked by a dealer if you find any
unusual behavior of the system (e.g., the warning
message appears too frequently).

444
uuHonda Sensing ®u Adaptive Cruise Control (ACC)
Driving
■Detection limitations
• A vehicle suddenly crosses in front of you.
• The interval between your vehicle and the vehicle 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 ahead of you at high
speed.
• The vehicle ahead of you is a motorcycle, bicycle, mobility scooter, or other small
vehicle.
• There are animals in front of your vehicle.
• You drive on a curved or winding or undulating road that makes it difficult for the
sensor to properly detect a vehicle in front of you.
• The speed difference between your vehicl e and a vehicle in front of you is
significantly large.
• An oncoming vehicle suddenly comes in front of you.
• Your vehicle abruptly crosses over in front of an oncoming vehicle.

445
uuHonda Sensing ®u Adaptive Cruise Control (ACC)
Continued
Driving
• Driving through a narrow iron bridge.
• The vehicle ahead of you brakes suddenly.
• The vehicle ahead of yo u has a unique shape.
• Your vehicle or the vehicle ahead of you is driving on one edge of the lane.
Radar detects upper section of
an empty carrier truck. Panel truck,
tanker truck,
etc.

uuHonda Sensing ®u Adaptive Cruise Control (ACC)
446
Driving
Increase or decrease the vehicle speed using the RES/+ or –/SET buttons on the
steering wheel.
• Each time you press the button, the vehicl e speed is increased or decreased by
about 1 mph or 1 km/h accordingly.
• If you keep the button pressed, the vehicl e speed increases or decreases by about
5 mph or 5 km/h accordingly.
Press the Interval button to change the ACC
following-interval.
Each time you press the button, the following-
interval (the interval behind a vehicle detected
ahead of you) setting cycles through short,
middle, long, and extra long following-
interval.
■To Adjust the Vehicle Speed1 To Adjust the Vehicle Speed
If a vehicle detected ahead is going at a speed slower
than your increased set speed, ACC may not
accelerate your vehicle. This is to maintain the set
interval between your vehi cle and the vehicle ahead.
You can set the vehicle speed using the –/SET button
on the steering wheel when adjusting the speed with
the accelerator and brake pedals.
■To Set or Change Following-interval
To increase speed
To decrease speed
Interval Button

447
uuHonda Sensing ®u Adaptive Cruise Control (ACC)
Continued
Driving
Determine the most appropriate following- interval setting based on your specific
driving conditions. Be sure to adhere to any following-interval requirements set by
local regulation.
The higher your vehicle’s following-speed is , the longer the short, middle, long or
extra long following-interval becomes. See the following examples for your
reference.
Following-intervalWhen the Set Speed is:
50 mph (80 km/h)65 mph (104 km/h)
Short
83 feet
25 meters
1.1 sec100 feet
31 meters
1.1 sec
Middle
110 feet
33 meters
1.5 sec137 feet
42 meters
1.5 sec
Long
154 feet
47 meters 2.1 sec200 feet
61 meters 2.1 sec
Extra
Long
204 feet
62 meters 2.8 sec265 feet
81 meters 2.8 sec