Acura MDX (2018 year). Manual - part 10

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Locking and Unlocking the Doors

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Locking/Unlocking the Doors from the Outside

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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) LED blinks once. Then after three seconds 
one of the following feedback will come:
• Green (center) comes on: Acknowledges 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.

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Checking Door Lock Status

*

1

Checking Door Lock Status

*

Operate the remote in an open space. If there are 
buildings or other obstacles 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 panic 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. 467

Red
Green
Amber

Lock 
Button

* Not available on all models

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Locking and Unlocking the Doors

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Locking/Unlocking the Doors from the Inside

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Locking/Unlocking the Doors from the Inside

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Locking a door

Push the lock tab forward.

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Unlocking a door

Pull the lock tab rearward.

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Using the Lock Tab

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Using the Lock Tab

When you lock the door using the lock tab on the 
driver’s door, all of the other doors and the tailgate 
lock at the same time.
When you unlock the door using the lock tab on the 
driver’s door, only the driver’s door will unlock.

To Unlock

Lock Tab

To Lock

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Locking and Unlocking the Doors

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Locking/Unlocking the Doors from the Inside

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Pull the front door inner handle.

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The door unlocks and opens in one 
motion.

Unlocking and opening the driver’s door from the inner handle unlocks all the other 
doors.

To avoid all the doors to be unlocked, use the lock tab on the driver’s door to unlock, 
then lock again before opening the door.

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This setting works for one time only. If you do not want all the doors to be 
unlocked all the time, customize the Auto Door Unlock setting to Off using 
the MID or information screen.

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Unlocking Using the Front Door Inner Handle

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Unlocking Using the Front Door Inner Handle

The front door inner handles are designed to allow 
front seat occupants to open the door in one motion. 
However, this feature requires that front seat 
occupants never pull a front door inner handle while 
the vehicle is in motion.

Children should always ride in a rear seat where 
childproof door locks are provided.

2 Childproof Door Locks P. 153

Inner Handle

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Locking and Unlocking the Doors

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Childproof Door Locks

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Press the master door lock switch in as shown 
to lock or unlock all the doors and the tailgate.

Childproof Door Locks

The childproof door locks prevent the rear doors from being opened from the inside 
regardless of the position of the lock tab.

Slide the lever in the rear door to the lock 
position, and close the door.

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When opening the door

Open the door using the outside door handle.

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Using the Master Door Lock Switch

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Using the Master Door Lock Switch

When you lock/unlock either front door using the 
master door lock switch, all the other doors and the 
tailgate lock/unlock at the same time.

To Unlock

Master Door Lock Switch

To Lock

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Setting the Childproof Door Locks

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Childproof Door Locks

To open the door from the inside when the 
childproof door lock is on, put the lock tab in the 
unlock position, lower the rear window, put your 
hand out of the window, and pull the outside door 
handle.

Lock

Unlock

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Locking and Unlocking the Doors

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Auto Door Locking/Unlocking

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Auto Door Locking/Unlocking

Your vehicle locks or unlocks all doors automatically when a certain condition is met.

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Drive lock mode

All doors and tailgate lock when the vehicle’s speed reaches about 10 mph (15 
km/h).

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Driver’s door open mode

All doors unlock when the driver’s door is opened.

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Auto Door Locking

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Auto Door Unlocking

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Auto Door Locking/Unlocking

You can turn off or change to another auto door 
locking/unlocking setting using the information 
screen or MID.

2 Customized Features P. 126, 358

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Opening and Closing the Tailgate

Precautions for Opening/Closing the Tailgate

Always make sure individuals and objects are clear of the tailgate before opening or 
closing it.

• Open the tailgate all the way.

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If it is not fully opened, the tailgate may begin to close under its own weight.

• Be careful when it is windy. The wind may cause the tailgate to close.

Keep the tailgate closed while driving to:

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Avoid possible damage.

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Prevent exhaust gas from leaking into the vehicle.

2 Carbon Monoxide Gas P. 74

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Precautions for Opening/Closing the Tailgate

Be careful not to hit your head on the tailgate or to 
put your hands between the tailgate and the cargo 
area when closing the tailgate.

When you are storing or picking up luggage from the 
cargo area while the engine is idling, do not stand in 
front of the exhaust pipe. You may get burned.

Do not allow any passenger in the cargo space. They 
may get hurt during hard braking, a sudden 
acceleration, or a crash.

3

WARNING

Anyone caught in the path of a tailgate 
that is being opened or closed can be 
seriously injured.

Make sure that all people are clear of the 
tailgate before opening or closing it.

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Opening and Closing the Tailgate

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Precautions for Opening/Closing the Tailgate

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The power tailgate can be operated by pressing the power tailgate button on the 
remote transmitter or driver's door, or pressing the outer handle or button on the 
tailgate.

The power tailgate can be opened when the transmission is in 

(

P.

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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 vehicle. People near the 
tailgate may be seriously 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 opening 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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Opening and Closing the Tailgate

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Opening/Closing the Power Tailgate

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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).

To reverse direction while the power tailgate is 
in operation, press the button again. The 
beeper sounds three times and the tailgate 
reverses direction.

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Customizing when to open the tailgate

Anytime: The power tailgate unlocks and opens at the same time. This is the 
default setting.
When Unlocked: The tailgate opens when all doors are unlocked.

2 Customized Features P. 126, 358

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Using the Remote Transmitter

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Opening/Closing the Power Tailgate

If you close the power tailgate 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 tailgate resumes once you 
manually close the tailgate.

Installing aftermarket components 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 tailgate 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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Opening and Closing the Tailgate

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Opening/Closing the Power Tailgate

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To open or close the power tailgate, press the 
power tailgate button for about one second.

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Some exterior lights flash and the beeper 
sounds.

To reverse direction while the power tailgate is 
in operation, press the button again. The 
beeper sounds three times and the tailgate 
reverses direction.

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Using the Power Tailgate Button

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Opening/Closing the Power Tailgate

If the power tailgate meets resistance while opening 
or closing, the auto reverse feature reverses the 
direction. The beeper sounds three times.

The auto reverse function stops sensing when the 
tailgate is almost closed to make sure that it fully 
closes.

Do not touch the sensors located on both sides of the 
tailgate. The power tailgate does not close if you 
touch either sensor when you are trying to close the 
tailgate.

Be careful not to scratch the sensors with a sharp 
object. If scratched, they can be damaged, and the 
power tailgate closing feature malfunctions.

Power Tailgate Button

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Opening and Closing the Tailgate

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Opening/Closing the Power Tailgate

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If you press the outer handle of the tailgate for 
no longer than one second, the tailgate opens 
automatically.

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The beeper sounds.

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If you want to open the tailgate 
manually, press the outer handle for 
more than one second.

2 Opening/Closing the Tailgate P. 162

If you are carrying the keyless access remote, 
you do not have to unlock the tailgate before 
opening it.

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Using the Tailgate Outer Handle

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Using the Tailgate Outer Handle

Do not leave the keyless access remote in the cargo 
area before closing the tailgate.

Even if you are not carrying the keyless access 
remote, you can lock/unlock the tailgate while 
someone else with the remote is within range.

You can change the setting to open the power 
tailgate by the tailgate outer handle.

2 Customized Features P. 126, 358

Outer Handle

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Opening and Closing the Tailgate

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Opening/Closing the Power Tailgate

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Press the button on the tailgate to close the 
power tailgate.

If you press the button again while the power 
tailgate is moving, it reverses direction.

If you manually close the power tailgate, it latches automatically.

■

Using the Tailgate Inner Button

Tailgate Inner 
Button

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Auto-Closer

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Auto-Closer

The auto-closer feature does not activate if you press 
the tailgate outer handle while the power tailgate is 
closing.

Do not put any force on the tailgate while the power 
tailgate is latching.

Keep your hands away from the tailgate when you 
manually close the tailgate and let it latch 
automatically. It is dangerous to put your hands 
around the tailgate as it starts to latch itself.

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Opening and Closing the Tailgate

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Opening/Closing the Power Tailgate

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Automatically lowers the power tailgate when there is a possibility that the fully 
opened power tailgate can fall down by its own weight (for example, by snow on 
the tailgate). The beeper sounds while the power tailgate lowers.

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Power Tailgate Fall Detection

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Power Tailgate Fall Detection

If you try to manually close the power tailgate 
immediately after it fully opens, the power tailgate 
fall detection may activate.

Once the power tailgate fall detection activates, wait 
until the power tailgate fully closes. Keep away from 
the power tailgate when it is in motion.

If the power tailgate fall detection constantly 
activates, consult at a dealer.

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Opening and Closing the Tailgate

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Opening/Closing the Tailgate

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Opening/Closing the Tailgate

When all the doors are unlocked, the tailgate 
is unlocked.

Press the outer handle of the tailgate and lift 
open the tailgate.

If you are carrying the keyless access remote, 
you do not have to unlock the tailgate before 
opening it.
To close the tailgate, grab the inner handle, 
pull the tailgate down, and push it closed 
from outside.

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Using the Tailgate Outer Handle

1

Opening/Closing the Tailgate

Do not leave the keyless access remote in the cargo 
area before closing the tailgate.

Even if you are not carrying the keyless access 
remote, you can lock/ unlock the tailgate while 
someone else with the remote is within range.

Outer Handle

Inner Handle

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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 following 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 opened with the key and then the hood is 
opened before the power mode is set to ON.

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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 transmitter, or keyless access system. The 
system, along with the horn and flashing lights, is deactivated.

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Immobilizer System

NOTICE

Leaving the key in the vehicle 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.

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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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Security System

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Security System Alarm

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Setting the security system alarm

The security system alarm automatically sets when the following conditions have 
been met:
• The power mode is set to VEHICLE OFF (LOCK).
• The hood is closed.
• All doors and the tailgate are locked from outside with the key, remote 

transmitter, or keyless access system.

■

When the security system alarm sets

The security system alarm indicator in the instrument panel blinks. When the 
blinking interval changes after about 15 seconds, the security system alarm is set.

■

To cancel the security system alarm

The security system alarm is canceled when the vehicle is unlocked using the key, 
remote transmitter, keyless access system, or the power mode is set to ON. The 
security system alarm indicator goes off at the same time.

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Security System Alarm

Do not set the security system alarm when someone 
is in the vehicle or a window is open. The system can 
accidentally activate when:

•

Unlocking the door with the lock tab.

•

Opening the hood with the hood release.

If the battery goes dead after you have set the 
security system alarm, the security alarm may go off 
once the battery is recharged or replaced.
If this occurs, deactivate the security system alarm by 
unlocking a door using the key, remote transmitter, 
or keyless access system.

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Security System

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Security System Alarm

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The panic button on the remote 
transmitter

If you press the panic button for 
approximately one second, the following will 
occur for about 30 seconds:
• The horn sounds.
• Some exterior lights flash.

■

Canceling panic mode

Press any button on the remote transmitter, or set the power mode to ON.

■

Panic Mode

Panic 
Button

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