start Acura MDX 2019 Owners Manual
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uuWhen Driving uAuto Idle Stop
Driving
Briefly keeps the brake applied after releasi ng the brake pedal to restart the engine. 
This can keep your vehicle from unexpectedly moving while on an incline.
■Starting Assist Brake Function
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uuWhen Driving uFront Sensor Camera
Driving
1Front 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 towards the camera.
•Start driving the vehicle to lower the windshield 
temperature, which cool s down the area around 
the camera.
If the Some Driver Assist Systems Cannot 
Operate: Clean Front Windshield  message 
appears:
•Park your vehicle in a sa fe place, and clean the 
windshield. If the message does not disappear after 
you have cleaned the winds hield and driven for a 
while, have your vehicle checked by a dealer.
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uuWhen Driving uAdaptive Cruise Control (ACC) with Low Speed Follow (LSF)
DrivingWhen driving at about 25  mph (40 km/h) or above: Take your foot off the 
pedal and press down the RES/+/ SET/– switch when you re ach the desired speed. 
The moment you release the switch, the set  speed is fixed, and ACC with LSF begins.
When driving at slower than about 25 mph (40 km/h):  If the vehicle is moving 
and the brake pedal is not depr essed, pressing the switch fixes the set speed to about 
25 mph (40 km/h) regardless of current vehi cle speed. While stationary and a vehicle 
is ahead of you, the vehicle speed can be set, even with the brake pedal depressed. When ACC with LSF starts operating, the 
vehicle icon, interval bars and set speed 
appear on the MID. 
■To Set the Vehicle Speed
On when ACC with LSF 
beginsPress down and release
RES/+/SET/−  Switch
Set Vehicle Speed
Set Vehicle Interval
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uuWhen Driving uAdaptive Cruise Control (ACC) with Low Speed Follow (LSF)
Driving
■There is a vehicle ahead
ACC with LSF monitors if a vehicle ahead of you enters the ACC with LSF range. If a 
vehicle is detected doing so, the ACC with  LSF system maintains or decelerates your 
vehicle’s set speed in order to keep the ve hicle’s set following-interval from the 
vehicle ahead.
2 To Set or Change Following-interval  P. 501
When a vehicle whose speed is slower than 
your set speed is detected in front of you, your 
vehicle starts to slow down.
■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 MID, and the head-up warning lights
* 
come on.
Depress the brake pedal,  and keep an appropriate 
interval from the vehicle ahead.
Even if the interval betw een your vehicle and the 
vehicle detected ahead is short, ACC with LSF may 
start accelerating your vehicle 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.
Beep
Head-up Warning 
Lights
*
ACC with LSF Range: 394 ft. (120 m)
A vehicle icon appears 
on the MID.
* Not available on all models
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uuWhen Driving uAdaptive Cruise Control (ACC) with Low Speed Follow (LSF)
Driving
■A vehicle detected ahead  is within ACC with LSF range and slows to a stop
Your vehicle also stops, automatically. The 
Stopped  message appears on the MID.
When the vehicle ahead  of you starts again, 
the vehicle icon on the  MID blinks. If you press 
the  RES/+/ SET/– switch up or down, or 
depress the accelerator pedal, ACC with LSF 
operates again within the prior set speed.1 A vehicle detected ahead is with in ACC with LSF range and slows 
to a stop
3WARNING
Exiting a vehicle that has been stopped 
while the ACC with LSF system is operating 
can result in the vehicle moving without 
operator control.
A vehicle that moves without operator 
control can cause a crash, resulting in 
serious injury or death.
Never exit a vehicle when the vehicle is 
stopped by ACC with LSF.
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uuWhen Driving uRoad Departure Mitigation (RDM) System
508
Driving
The system cancels assisting  operations when you turn th e 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.
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 the driver is not actively accelerating, 
braking or steering.
■How the System Activates1How the System Activates
The RDM system may automa tically shut off and the 
 indicator comes and stays on.
2 Indicators P. 94
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.
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uuWhen Driving uLane Keeping Assist System (LKAS)
Driving
3. Keep your vehicle near the center of the 
lane while driving.
u 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 Cancel1 To Cancel
Pressing the MAIN button also turns ACC with LSF 
on and off.
MAIN  Button
LKAS Button
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uuWhen Driving uLane Keeping Assist System (LKAS)
Driving
■The system operation is suspended if 
you:
• Set the wipers to continuous operation.
u Turning the wipers off resumes the 
LKAS.
• Set the wiper switch to  AUTO and the 
wipers operate continuously.
u The LKAS resumes when the wipers stop 
or operate intermittently.
• Decrease the vehicle speed to about 40 
mph (64 km/h) or less.
u Increasing the vehicle speed to about 45 
mph (72 km/h) or more resumes the 
LKAS.
• Depress the brake pedal.
u The LKAS resumes and starts detecting 
the lane lines again once you release the 
brake pedal.
When the LKAS is suspended, 
the lane lines on the MID 
change to contour lines, and the 
beeper sounds (if activated).
Models with automatic intermittent wipers
All models
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uuWhen Driving uVehicle Stability Assist ® (VSA ®), aka Electronic Stability Control (ESC), System
Driving
This button is on the driver side control panel. 
To partially disable VSA ® functionality/
features, press and hold it until you hear a 
beep.
Your vehicle will have normal braking and 
cornering ability, but tra ction control function 
will be less effective.
To restore VSA ® functionality/features, press 
the  (VSA ® OFF) button until you hear a 
beep.
VSA ® is turned on every time you start the 
engine, even if you turned it off the last time 
you drove the vehicle.
■VSA ® On and Off1 Vehicle Stability Assist ® (VSA ®), aka Electronic Stability Control 
(ESC), System
In certain unusual  conditions when your vehicle gets 
stuck in shallow mud or fr esh snow, it may be easier 
to free it with the VSA ® temporarily switched off.
When the   button is pressed, the traction control 
function becomes less effective. This allows for the 
wheels to spin more freely  at low speed. You should 
only attempt to free your vehicle with the VSA ® off if 
you are not able to free it when the VSA ® is on.
Immediately after  freeing your vehicle, be sure to 
switch VSA ® on again. We do not recommend driving 
your vehicle with the VSA ® system switched off.
You may hear a motor sound coming from the 
engine compartment while system checks are being 
performed immediately after starting the engine or 
while driving. This is normal.
VSA ® OFF Indicator
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uuWhen Driving uTire Pressure Monitoring System (TPMS) - Required Federal Explanation
Driving
Please note that the TPMS is not  a substitute for proper tire 
maintenance, and it is the driver ’s responsibility to maintain 
correct tire pressure, even if un der-inflation has not reached the 
level to trigger illumina tion of the TPMS low ti re pressure telltale.
Your vehicle has also been eq uipped with a TPMS malfunction 
indicator to indicate when the sy stem is not operating properly.
The TPMS malfunction indicator is combined with the low tire 
pressure telltale. When the system detects a malfunction, the 
telltale will flash fo r approximately one minute and then remain 
continuously illuminated. This sequence will continue upon 
subsequent vehicle start-ups as  long as the malfunction exists.
When the malfunction indicator is  illuminated, the system may 
not be able to detect or signal low tire pressure as intended.
TPMS malfunctions may  occur for a variety of reasons, including 
the installation of replacement or alternate tires or wheels on the 
vehicle that prevent the TPMS from functioning properly.
Always check the TPMS malfunction  telltale after replacing one or 
more tires or wheels on your vehicle to ensure that the 
replacement or alternate tires  and wheels allow the TPMS to 
continue to function properly.
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