start Acura MDX 2019 Owner's Guide
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uuLocking and Unlocking the Doors uLocking/Unlocking the Doors from the Outside
150
Controls
You can remotely check if your vehicle’s doors 
are all locked or any  are unlocked using the 
keyless access remote from extended 
distances.
Press the lock button, the Amber (LEFT) LE D blinks once. Then after three seconds 
one of the following feedback will come:
• Green (center) comes on: Acknowle dges that the doors are locked.
• Red (right) comes on: Acknowledges that doors are not locked, or any door is not 
completely closed.
• Red (right) blinks three times: The remote  does not receive the door lock status 
from the vehicle.
■Checking Door Lock Status*1 Checking Door Lock Status*
Operate the remote in an open space. If there are 
buildings or other obstacl es between your vehicle 
and the remote, the remote may not work even 
within the operable range. However, the range 
required for unlocking the tailgate and all the doors 
as well as activating the pa nic function is the same as 
that required for operating the standard keyless 
access remote. 2 Using the Remote Transmitter  P. 147
When checking the door lock  status, you can also 
start or stop the engine. 2 Remote Engine Start with Vehicle 
Feedback
* P. 469
Red
Green
Amber
Lock 
Button
* Not available on all models
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uuOpening and Closing the Tailgate uPrecautions for Openi ng/Closing the Tailgate
156
Controls
The power tailgate can be operated by  pressing the power tailgate button on the 
remote transmitter or driver's door, or pr essing the outer handle or button on the 
tailgate.
The power tailgate can be opened when the transmission is in 
(P.
1 Precautions for Opening/Closing the Tailgate
NOTICE
Do not push or pull on the power tailgate when it is 
being automatically opened or closed.
Forcibly opening or closing  the power tailgate while 
in operation can deform the tailgate frame.
When operating the power tailgate, make sure there 
is enough space around your ve hicle. People near the 
tailgate may be se riously hurt if the tailgate hits or 
closes on their heads. Be  especially cautious if 
children are around.
The power tailgate may not  open or close under the 
following conditions:
•You start the engine while the tailgate is 
automatically openi ng or closing.
•The vehicle is parked on a steep hill.•The vehicle is swayed in a strong wind.
•The tailgate or the roof is  covered with snow or ice.
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157
uuOpening and Closing the Tailgate uOpening/Closing the Power Tailgate
Continued
Controls
Opening/Closing the Power Tailgate
Press the power tailgate button for more than 
one second to operate when the power mode 
is in VEHICLE OFF (LOCK).
u Some exterior lights flash and the beeper 
sounds.
If you press the button again while the power 
tailgate is moving, it reverses direction.
■Customizing when to open the tailgate
Anytime:  The power tailgate unlocks and open s at the same time. This is the 
default setting.
When Unlocked:  The tailgate opens when  all doors are unlocked.
2Customized Features  P. 126, 360
■Using the Remote Transmitter1Opening/Closing the Power Tailgate
If you close the power tail gate when all the doors are 
locked, the power tailgate locks automatically.
If you replace the battery or  the power tailgate fuse 
while the tailgate is open,  the power tailgate may be 
disabled. The power tail gate resumes once you 
manually close the tailgate.
Installing aftermarket com ponents other than Acura 
genuine accessories on the power tailgate may 
prevent it from fully opening or closing.
Make sure the power tailgate is fully open before you 
get your luggage in and out.
Make sure the power tailgat e is fully closed before 
you start the vehicle.
The beeper sounds when you start driving while the 
power tailgate  is still open, or closing.
Power 
Tailgate 
Button
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163Continued
Controls
Security System
Immobilizer System
The immobilizer system prevents a key that has not been pre-registered from 
starting the engine. Each key  contains electronic transmitters that use electronic 
signals to verify the key.
Pay attention to the follo wing when pressing the ENGINE START/STOP button:
• Do not allow objects that emit  strong radio waves near the ENGINE START/
STOP  button.
• Make sure the key is not covered  by or touching a metal object.
• Do not bring a key from another vehicle’s immobilizer system near the  ENGINE 
START/STOP button.
• Do not put the key near magnetic items.  Electronic devices, such as televisions 
and audio systems emit strong magnetic  fields. Note that even a key chain can 
become magnetic.
Security System Alarm
The security system alarm activates when  the tailgate, hood or doors are forcibly 
opened. The alarm does not activate if the tailgate or doors are opened with the key, 
remote transmitter or keyless access system.
However, the alarm activates if a door is op ened with the key and then the hood is 
opened before the power mode is set to ON.
■When the security system alarm activates
The horn sounds intermittently, and some exterior lights flash.
■To deactivate the security system alarm
Unlock the vehicle using the key, remote tra nsmitter, or keyless access system. The 
system, along with the horn and flashing lights, is deactivated.
1 Immobilizer System
NOTICE
Leaving the key in the vehicl e can result in theft or 
accidental movement of the vehicle.
Always take the key with you whenever you leave the 
vehicle unattended.
Do not alter the system or  add other devices to it.
Doing so may damage the system and make your 
vehicle inoperable.
1 Security System Alarm
Do not alter the system or  add other devices to it.
Doing so may damage the system and make your 
vehicle inoperable.
The security alarm continues for a maximum of two 
minutes until the security system alarm deactivates.
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169Continued
Controls
Operating the Switches Around the Steering Wheel
ENGINE START/STOP Button
*1:Canadian models
■Changing the Power Mode1ENGINE START/STOP Button
ENGINE START/STOP  Button Operating Range
You can start the engine when the keyless access 
remote is inside the vehicle.
The engine may also run if the keyless access remote 
is close to the door or window,  even if it is outside the 
vehicle.
ON mode:
Indicator in the button is of f, if the engine is running.
If the battery of the keyless access remote is getting 
low, the engine may not start when you press the 
ENGINE START/STOP  button. If the engine does not 
start, refer to the following link.
2 If the Keyless Access Remote Battery is 
Weak P. 651
Do not leave the power mode in ACCESSORY or ON 
when you get out.
Operating RangeVEHICLE OFF (LOCK)
Indicator in the button is off.
The steering wheel is locked
*1. 
The power to all electrical components is turned off.
ACCESSORY
Indicator in the button is on.
Operate the audio system and other accessories in this 
position.
ON
Indicator in the button is on.
All electrical components can be used.
Press the button.
Indicator
Without pressing 
the brake pedal
Press the button without 
the transmission in 
( P.
Press the button with 
the transmission in 
( P.
Put the transmission into (P.
U.S. models
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170
uuOperating the Switches Around the Steering Wheel uENGINE START/STOP Button
Controls
If you leave the vehicle for 30 to  60 minutes with the transmission in (P and the 
power mode in ACCESSORY, the vehicle automa tically goes into the mode similar to 
VEHICLE OFF (LOCK) to avoid draining the battery.
When in this mode:
The steering wheel does not lock.
You cannot lock or unlock doors with th e remote transmitter or the keyless access 
system.
Press the  ENGINE START/STOP  button twice to switch the mode to VEHICLE OFF 
(LOCK).
If you open the driver’s doo r when the power mode is set to ACCESSORY, a warning 
buzzer sounds.
■Automatic Power Off
■Power Mode Reminder
Canadian models
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171
uuOperating the Switches Around the Steering Wheel uENGINE START/STOP Button
Controls
Warning buzzers may sound from inside and/
or outside the vehicle  to remind you that the 
keyless access remote is out of the vehicle. If 
the buzzer continues even after the remote is 
put back inside, place it to be within its 
operational range.
■When the power mode is in ON
If the keyless access remote is taken out of the 
vehicle, and the driver’s door is closed, a 
warning buzzer sounds from both inside and 
outside the vehicle. A warning message on 
the MID notifies the driver inside that the 
remote is outside of the vehicle.
■When the power mode is in 
ACCESSORY
If the keyless access remote is taken out of the 
vehicle, and the driver’s door is closed, a 
warning buzzer sounds from outside the 
vehicle.
■Keyless Access Remote Reminder1 Keyless Access Remote Reminder
When the keyless access remote is within the 
system’s operational range,  and the driver’s door is 
closed, the warni ng function cancels.
If the keyless access remote is  taken out of the vehicle 
after the engine has been started, you can no longer 
change the  ENGINE START/STOP  button mode or 
restart the engine. Always make sure if the remote is 
in your vehicle when you operate the  ENGINE 
START/STOP button.
Removing the keyless access remote from the vehicle 
through a window does not  activate the warning 
buzzer.
Do not put the keyless access remote on the 
dashboard or in the glove box. It may cause the 
warning buzzer to go of f. Under some other 
conditions that can prevent  the vehicle from locating 
the remote, the warning buzzer may also go off even 
if the remote is within the system’s operational 
range.
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173
uuOperating the Switches Around the Steering Wheel uLight Switches
Continued
Controls
Light Switches
Rotating the light switch turns the lights on 
and off, regardless of the power mode 
setting.
■High beams
Push the lever forward until you hear a click.
■Low beams
When in high beams, pull the lever back to 
return to low beams.
■Flashing the high beams
Pull the lever back, and release it.
■Lights off
Turn the lever to  OFF either when:
• The transmission is in 
(P.
• The parking brake is applied.
To turn the light s on again, turn the lever to 
OFF  to cancel the lights  off mode. Even if you 
do not cancel the lights  off mode, the lights 
come on automatically when:
• The transmission is taken out of 
(P and the 
parking brake is released.
• The vehicle starts to move.
■Manual Operation1Light Switches
If you leave the power mode  in VEHICLE OFF (LOCK) 
while the lights are on, a chime sounds when the 
driver’s door is opened.
When the lights are on, the  lights on indicator in the 
instrument pane l will be on.
2 Lights On Indicator P. 89
Do not leave the lights on when the engine is off 
because it will  cause the battery to discharge.
If you sense that the le vel of the headlights is 
abnormal, have the vehicl e inspected by a dealer.
Your vehicle is equipped with the automatic 
headlight adjusting system that automatically adjusts 
the vertical angle of the high/low beam headlights. If 
you find a significant  change in the vertical angle of 
the headlights, there may be a problem with the 
system. Have your vehicle checked by a dealer.
Models without automatic headlight adjusting system
Models with automatic headlight adjusting system
High Beams
Flashing the high beams
Low Beams
Turns on parking, side marker, 
tail, and rear license plate lights
Turns on headlights, parking, 
side marker, tail, and rear 
license plate lights
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uuOperating the Switches Around the Steering Wheel uAuto High-Beam
178
Controls
To activate the system, turn the headlight 
switch to  AUTO and then set the headlights 
to low beam. The auto high-beam indicator 
will come on.
2 Light Switches  P. 173
The high beams remain on unless:
•You have been driving below 45 mph (72 km/h) for an extended amount of time.
• The speed of the vehicle drops below 30 mph (48 km/h).
• The windshield wipers have been running at a high speed for more than a few 
seconds.
• You enter a well lit location.
The high beams come back on once the condition that caused them to turn off no 
longer exists.
If needed, you can temporar ily turn the system off manually. Turn on the high 
beams by pushing the lever forward until yo u hear a click, or flash the high beams 
once by pulling the lever toward  you. To turn the system back on, repeat one of the 
procedures.
■Operating the System1 Operating the System
For the auto high-beam to work properly:
•Do not place an object that reflects light on the 
dashboard.
•Keep the windshield around the camera clean.•Do not attach an object, sticker or film to the area 
around the camera.
If the camera receives a st rong impact, or repairing of 
the area near the camera is  required, consult a dealer.
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 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.
Headlight 
Switch
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179
uuOperating the Switches Around the Steering Wheel uAuto High-Beam
Controls
Disable or re-enable the system when the 
vehicle is parked with  the power mode in ON 
and the light switch is in the  AUTO position.
Disabling the system:  Pull the light switch 
lever toward you and hold it for at least 40 
seconds. The auto high -beam indicator in the 
meter will blink twice.
Re-enabling the system: Pull the light 
switch lever toward you an d hold it for at least 
30 seconds. The auto hi gh-beam indicator in 
the meter will blink once.
■Disabling or Re-enabling the System1 Disabling or Re-enabling the System
The auto high-beam is in  the previously selected 
disabled or re-enabled sett ing each time you start the 
engine.
AUTO  Position
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