sensor Acura MDX HYBRID 2019 Service Manual
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Continued489
uuWhen Driving uAdaptive Cruise Control (ACC) with Low Speed Follow (LSF)
Driving
■Automatic ca ncellation
The beeper sounds and a message appear s on the MID when ACC with LSF is 
automatically canceled. Any of these co nditions may cause the ACC with LSF to 
automatically cancel:
• Bad weather (rain, fog, snow, etc.)
• When the radar sensor behind the emblem gets dirty.
• The vehicle ahead of yo u cannot be detected.
• An abnormal tire condition is detected, or the tires are skidding.
• Driving on a mountainous road, or driving off road for extended periods.
• Abrupt steering wheel movement.
• When the ABS, VSA ® or CMBS
TM is activated.
• When the ABS or VSA ® system indicator comes on.
• When the vehicle is stopped on a very steep slope.
• When you manually apply the parking brake.
• When the detected vehicle within the AC C with LSF range is too close to your 
vehicle.
• When the detected vehicle goes out of th e ACC with LSF range while your vehicle 
is stationary.
• The camera behind the rearview mirror, or the area around the camera, including 
the windshield, gets dirty.
The ACC with LSF automatic cancellation ca n be also triggered by the following 
causes. In these cases, th e electric parking brake will  be automatically applied.
• The driver’s seat belt is unfastene d when the vehicle is stationary.
• The vehicle stops for more than 10 minutes.
• The power system is turned off.
1Automatic cancellation
Even though ACC with LSF has been automatically 
canceled, you can still resu me the prior set speed. 
Wait until the condition that caused ACC with LSF to 
cancel improves, then press the  RES/+/SET/– switch 
up.
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492
uuWhen Driving uRoad Departure Mitigation (RDM) System
Driving
Road Departure Mitigation (RDM) System
Alerts and helps to assist you when the sy stem detects a possibility of your vehicle 
unintentionally crossing over detected la ne 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. 131, 362
As a visual alert, the Lane Departure 
message appears on the MID.
If the system determines  that its steering input 
is insufficient to keep your vehicle on the 
roadway, it may apply braking. u Braking is applied only when the lane 
markings are solid continuous lines.
The system cancels assisting operations wh en 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 la ne markings or lane or 
roadway departures; accu racy will vary based on 
weather, speed and lane marker condition. It is 
always your responsibilit y 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. 475
The RDM system may not wo rk properly or may work 
improperly under the certain conditions: 2 RDM Conditions and Limitations  P. 495
There are times when you may not notice RDM 
functions due to your opera tion of the vehicle, or 
road surface conditions.
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uuWhen Driving uLane Keeping Assist System (LKAS)
Continued
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 al erts if the vehicle is detected drifting out of its lane.1Lane 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 y our hands off the steering 
wheel or fail to steer the vehicle.
2 Multi-Information Display Warning and 
Information Messages  P. 122
Do not place objects on the instrument panel. 
Objects may reflect on th e windshield and prevent 
correct detection of the traffic lanes.
The 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 an d 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. 503
You can read about handling information for the 
camera equipped with this system. 2 Front Sensor Camera  P. 475
The LKAS may not function  as designed while driving 
in frequent stop and go traf fic, or on roads with 
sharp curves.
When you operate the turn signals to chan ge lanes, the system is suspended, and 
resumes after the signals are off.
If you make a lane change without operat ing 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.
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509
uuWhen Driving uBlind spot information System
Continued
Driving
Blind spot information System
Is designed to detect vehicles in specifie d alert zones adjacent to your vehicle, 
particularly in harder to see areas  commonly known as “blind spots.”
When the system detects vehicles approaching from behind in adjacent lanes, the 
appropriate indicator comes on for a few se conds, providing assistance when you 
change lanes.
■How the system works
1 Blind spot information System
Important Safety Reminder
Like all assistance systems, blind spot information 
system has limitations. Over reliance on blind spot 
information system may result in a collision.
The blind spot information  system alert indicator may 
not come on under the following conditions:
•A vehicle does not stay in  the alert zone for more 
than two seconds.
•A vehicle is parked in a side lane.
•The speed difference betw een your vehicle and the 
vehicle you are passing is  greater than 6 mph (10 
km/h).
•An object not detected by the radar sensors 
approaches or passes your vehicle.
•A vehicle running in the  adjacent lane is a 
motorcycle or other small vehicle.
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 the blind spot 
information system wh en changing lanes.
Always look in your mirrors, to either side 
of your vehicle, and behind you for other 
vehicles before changing lanes.
Alert zone range
A: Approx. 1.6 ft. (0.5 m)
B: Approx. 10 ft. (3 m)
C: Approx. 10 ft. (3 m) Radar Sensors:
underneath the 
rear bumper 
corners
Alert Zone
A
B
C
●The transmission is in 
(D or (S.●Your vehicle speed is 
between 20 mph (32 
km/h) and 100 mph 
(160 km/h)
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uuWhen Driving uBlind spot information System
510
Driving
■When the system detects a vehicle
Blind spot information System Alert Indicator: 
Located near the pillar on both sides.
Comes on when:
•A vehicle enters the alert zone from behind 
to overtake you with a speed difference of 
no more than 31 mph (50 km/h) from your 
vehicle.
• You pass a vehicle with a speed difference 
of no more than 12 mph (20 km/h).
Blinks and a beeper sounds when:
You move the turn signal lever in the direction 
of the detected vehicle. The beeper sounds 
three times.1 Blind spot information System
The system is for your convenience only. Even if an 
object is within the alert zone, the following 
situations may occur.
•The blind spot informatio n system alert indicator 
may not come on due to  obstruction (splashes, 
etc.) even without the  Blind Spot Info Not 
Available MID appearing.
•The blind spot informatio n system alert indicator 
may come on even with  the message appearing.
The system does not operate when in 
( R.
You can turn off the audible al ert, or all the blind spot 
information system alert using the information screen 
or MID.
2 Customizable Features  P. 134, 362
Blind spot information sy stem may be adversely 
affected when:
•Objects (guard rails, poles, trees, etc,.) are 
detected.
•An object that does not re flect radio waves well, 
such as a motorcycle, is in the alert zone.
•Driving on a curved road.
•A vehicle is moving from a  far lane to the adjacent 
lane.
•The system picks up external electrical interference.
•The rear bumper or the sensors have been 
improperly repaired or the rear bumper has been 
deformed.
•The orientation of  the sensors has been changed.
•In bad weather (Heavy rain, snow, and fog).
Comes On
Blinks
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uuWhen Driving uBlind spot information System
Driving
1Blind spot information System
For a proper blind spot in formation system operation:
•Always keep the rear bumper corner area clean.
•Do not cover the rear bumper corner area with 
labels or stickers of any kind. 
•Take your vehicle to a dealer if you need the rear 
bumper corner area or the radar sensors to be 
repaired, or the re ar bumper corner area is strongly 
impacted.
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uuBraking uCollision Mitigation Braking SystemTM (CMBSTM)
Continued
Driving
Collision Mitigation Braking SystemTM (CMBSTM)
Can assist you when there is a possibility of your vehicle colliding with a vehicle or a 
pedestrian detected in front of yours. The CMBSTM is designed to alert you when a 
potential collision is determined, as well as  to reduce your vehicle speed to help 
minimize collision severity when a collision is deemed unavoidable.
■How the system works
1 Collision Mitigation Braking SystemTM (CMBSTM)
Important Safety Reminder
The CMBS
TM is designed to reduce the severity of an 
unavoidable collision. It do es not prevent a collision 
nor stop the vehicle automati cally. It is still your 
responsibility to  operate the brake  pedal and steering 
wheel appropriately acco rding to the driving 
conditions.
The CMBS
TM may not activate or may not detect a 
vehicle in front of y our vehicle under certain 
conditions: 2 CMBS
TM Conditions and Limitations  P. 529
You can read about handling information for the 
camera equipped with this system. 2 Front Sensor Camera  P. 475
Be careful not to severely  impact the radar sensor 
cover.
1 How the system works
Rapid vibrations on the  steering wheel alert you 
when your vehicle speed  is between 19 and 62 mph 
(30 and 100 km/h) with an oncoming vehicle 
detected in front of you.
When the CMBS
TM activates, it may automatically 
apply the brake. It will be  canceled when your vehicle 
stops or a potential coll ision is not determined.
The system starts monitoring the roadway ah ead when your vehicle speed is about 
3 mph (5 km/h) and there is a vehicle in front of you. The radar sensor is 
behind the emblem.
The CMBS
TM activates when:●The speed difference between your vehicle and a vehicle or pedestrian 
detected in front of you becomes about 3 mph (5 km/h) and over with a chance 
of a collision.
●Your vehicle speed is about 62 mph (100 km/h) or less and there is a chance of a 
collision with an oncoming detected vehicle or a pedestrian in front of you. The camera is 
located behind the 
rearview mirror.
When to use
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uuBraking uCollision Mitigation Braking SystemTM (CMBSTM)
Continued
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 sensors detect a  vehicleAudible & Visual WARNINGSSteering WheelBraking
Stage one
There 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 two
The 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
Normal
Short
Long
Your 
Vehicle Vehicle 
Ahead
Your 
VehicleVehicle 
Ahead
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Continued529
uuBraking uCollision Mitigation Braking SystemTM (CMBSTM)
Driving
The system may automatically shut off and the CMBSTM indicator will come on under 
certain conditions. Some examples of these conditions  are listed below. Other 
conditions may reduce some of the CMBS
TM functions.
2 Front Sensor Camera  P. 475
■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 objects and the background.
• Driving into low sunlight (e.g., at dawn or dusk).
• Strong light is reflec ted onto the roadway.
• Driving in the shadows of trees, buildings, etc.
• Roadway objects or structures are misinterpreted as vehicles and pedestrians.
• Reflections on the interi or of the windshield.
• Driving at night or in a dark condition such as a tunnel.
■Roadway conditions
• Driving on a snowy or wet roadway (obs cured lane marking, vehicle tracks, 
reflected lights, road  spray, high contrast).
• The road is hilly or the vehicle  is approaching the crest of a hill.
• Driving on curvy, winding, or undulating roads.
■CMBSTM Conditions and Limitations1CMBSTM Conditions and Limitations
Have your vehicle checked by a dealer if you find any 
unusual behavior of the system (e.g., the warning 
message appears too frequently).
If the front of the vehicle  is impacted in any of the 
following situations, the ra dar sensor may not work 
properly. Have your vehi cle checked by a dealer:
•The vehicle mounted onto a bump, curb, chock, 
embankment, etc.
•You drive the vehicle where the water is deep.•Your vehicle has a frontal collision.
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 
CMBS
TM off button and take your  vehicle to a dealer.
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uuBraking uCollision Mitigation Braking SystemTM (CMBSTM)
Driving
■Vehicle conditions
• Headlight lenses are dirty or the  headlights are not properly adjusted.
• The outside of the windshie ld is blocked by dirt, mud, leaves, wet snow, etc.
• The inside of the windshield is fogged.
• An abnormal tire or wheel condition (wrong sized, varied size or construction, 
improperly inflated, compact spare tire
*, etc.).
• When tire chains are installed.
• The vehicle is tilted due to a heav y load or suspension modifications.
• The camera temperature gets too high.
• Driving with the parking brake applied.
• When the radar sensor behind the emblem gets dirty.
* Not available on all models
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