sensor Acura MDX 2011 Service Manual

The BSI alert indicator starts to blink
as a reminder if you move the turn
signal lever in the direction of the
detected vehicle.
Radar sensors, located underneath
each corner of the rear bumper,
detect objects. Do not cover this area
with labels or stickers of any kind.
Always keep this area is free of any
kind of dirt every time you get in the
vehicle.
Impacts to the radar sensors or the
area around them can affect system
performance. If an impact occurs,
have the system checked by your
dealer.
LEVERINDICATOR
ILLUMINATE BLINK
CONTINUED
Blind Spot Information System (BSI)
473
Driving
10/06/29 11:59:04 11 ACURA MDX MMC North America Owner's M 50 31STX640 enu

Important Precautions
Like all assistance systems, BSI has
limitations. Over-reliance on BSI may
result in a collision. Always look in
your mirrors, to either side of your
vehicle, and behind you for other
vehicles before changing lanes.The system should be turned off
when towing a trailer. Due to the
added mass and resulting changes in
radar coverage, the system cannot
operate as intended, and detection of
the trailer itself by the radar sensors
may cause the BSI alert indicators to
illuminate.Limitations
The BSI alert indicators may not
illuminate under the following
circumstances:
●
The speed difference between
your vehicle and a vehicle
approaching from behind is
greater than 31 mph (50 km/h).
●
A vehicle is parked in a side lane.
●
The speed difference between
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.
Blind Spot Information System (BSI)47410/06/29 11:59:04 11 ACURA MDX MMC North America Owner's M 50 31STX640 enu

BSI may be adversely affected under
the following circumstances:●
When objects such as guard rails,
poles, trees, etc., are detected.
●
When an object that doesn't reflect
radio waves well, such as a
motorcycle, is in the alert zone.
●
A vehicle is behind or approaching
your vehicle while on a curved
road.
●
When towing a trailer.
●
A vehicle is moving from a far lane
to the adjacent lane.
●
The system picks up external
electrical interference.
●
The rear bumper has been
deformed, or improperly repaired.
●
The orientation of the sensors has
been changed.
●
Bad weather conditions, such as
heavy rain, snow and fog.The system is for your convenience.
Even if an object is within the alert
zone, the system may not detect it,
depending on its shape.
Always look in your mirrors, to either
side of your vehicle, and behind you
for other vehicles before changing
lanes.EXAMPLES
MOTORCYCLEGUARD RAIL
POLE or TREE
● : BSI Alert indicator is on
○ : BSI Alert indicator is off
CONTINUED
Blind Spot Information System (BSI)
475
Driving
10/06/29 11:59:04 11 ACURA MDX MMC North America Owner's M 50 31STX640 enu

BSI Status Displays
SystemStatus Multi-information
display message BSI Indicator Description
ON －
When you push the BSI OFF button, a BSI ON or OFF message is displayed on the multi-information
display for about 5 seconds.
The BSI indicator will remain on while the system is off.
A chime sounds to indicate that the system has been turned ON or OFF.
OFF
ON/OFF
ꭧ
If while driving, mud, snow, or ice accumulates in the vicinity of sensor:●
The system may shut down
●
The BSI indicator illuminates, a message is displayed on the multi-information display, and a chime
sounds.
The BSI indicator will turn off and the system will return to normal once the obstacle is removed, and
you begin to drive.
Always keep the area around the radar sensors clean. BSI may not operate properly if the sensors are
obstructed.
The BSI alert indicator:
●
May come on when a vehicle enters one of the alert zones, even if this message is displayed.
●
May not come on due to obstruction (splashes, etc.), even if this message is not displayed.
ꭧ : System status may remain on even when the BLIND SPOT NOT AVAILABLE message is
displayed.
OFF If the system is faulty, the BSI indicator illuminates and a message is displayed on the multi-
information display.
Have your vehicle inspected by your Acura dealer.
CONTINUED
Blind Spot Information System (BSI)
477
Driving
10/06/29 11:59:04 11 ACURA MDX MMC North America Owner's M 50 31STX640 enu

As required by the FCC:This device complies with Part 15 of theFCC rules. Operation is subject to the
following two conditions: (1) This devicemay not cause harmful interference, and(2) this device must accept any
interference received, includinginterference that may cause undesiredoperation.
Changes or modifications not expresslyapproved by the party responsible for
compliance could void the user'sauthority to operate the equipment.
This device complies with IndustryCanada Standard RSS-210.
Operation is subject to the following twoconditions: (1) this device may not causeinterference, and (2) this device mustaccept any interference that may cause
undesired operation of the device.
Active Damper SystemIf equippedThe active damper system is always
on, constantly adjusting your
vehicle's dampers to the best settings
for current road conditions along
with vehicle speed and handling
inputs. The system uses electrically
controlled dampers to enhance
handling precision, vehicle
composure, tire to road adhesion and
rough road ride comfort isolation.
The system reacts to inputs from
various electronic sensors to give
exactly the right amount of
suspension damping to provide
optimal ride comfort and handling.
Blind Spot Information System (BSI), Active Damper System47810/06/29 11:59:04 11 ACURA MDX MMC North America Owner's M 50 31STX640 enu

Handling Crosswinds and BuffetingCrosswinds and air turbulence
caused by passing trucks can disrupt
your steering and cause the trailer to
sway. When being passed by a large
vehicle, keep a constant speed, and
steer straight ahead. Do not try to
make quick steering or braking
corrections.Backing UpAlways drive slowly and have
someone guide you when backing
up. Grip the
bottom
of the steering
wheel, then turn the wheel to the left
to get the trailer to move to the left.
Turn the wheel to the right to move
the trailer to the right.
ParkingFollow all normal precautions when
parking, including putting the
transmission in Park and firmly
setting the parking brake. Also, place
wheel chocks at each of the trailer's
tires.
Retrieving a BoatIf the vehicle tires slip when
retrieving a boat from the water,
keep the transmission in the D
position and do not use the
sequential sport shift mode. This
prevents the transmission damage.
Towing Your Vehicle
Your vehicle is not designed to be
towed behind a motor home. If your
vehicle needs to be towed in an
emergency, see page 566. Trailer Stability Assist
Your vehicle is equipped with trailer
stability assist function. This function
works on the same sensors as the
vehicle stability assist (VSA) system.
This function helps to stabilize the
vehicle/trailer combination when the
trailer severely sways or oscillates.
For more information on the VSA
system, see page 467.
If the function detects vehicle/trailer
instability, it checks if the swaying is
caused by the trailer, and if the
trailer swaying or oscillation is
increasing.
The vehicle/trailer combination is
more affected by crosswinds,
buffeting, and improper tongue load.
These conditions can make the
trailer unstable, and cause it to sway.
Towing a Trailer, Trailer Stability Assist49210/06/29 11:59:04 11 ACURA MDX MMC North America Owner's M 50 31STX640 enu

The floor mats that came with your
vehicle hook over the floor mat
anchors. This keeps the floor mats
from sliding forward, possibly
interfering with the pedals, or
backwards, making the front
passenger's weight sensors
ineffective.
If you remove a floor mat, make sure
to re-anchor it when you put it back
in your vehicle.
If you use a non-Acura floor mat,
make sure it fits properly and that it
can be used with the floor mat
anchors. Do not put additional floor
mats on top of the anchored mats.
Front
Rear
Floor Mats
529
Maintenance
10/06/29 11:59:04 11 ACURA MDX MMC North America Owner's M 50 31STX640 enu

The sensor on the negative terminal
monitors your vehicles battery
condition.
If there is a problem with the sensor,
you will see a‘‘CHECK BATTERY
SENSOR’’ message on the multi-
information display. Have the vehicle
checked by your dealer. Check the terminals for corrosion (a
white or yellowish powder). To
remove it, cover the terminals with a
solution of baking soda and water. It
will bubble up and turn brown. When
this stops, wash it off with plain
water. Dry off the battery with a cloth
or paper towel. Coat the terminals
with grease to help prevent further
corrosion.
If additional battery maintenance is
needed, see your dealer or a
qualified technician.
WARNING:
Battery posts,
terminals, and related accessories
contain lead and lead compounds.
Wash your hands after handling.
If you need to connect the battery to
a charger, disconnect both cables to
prevent damaging your vehicle's
electrical system. Always disconnect
the negative (－ ) cable first, and
reconnect it last.
The battery gives off explosive
hydrogen gas during normal
operation.
A spark or flame can cause the
battery to explode with enough
force to kill or seriously hurt
you.
Wear protective clothing and a
face shield, or have a skilled
technician do the battery
maintenance.
If the radio fuse is removed, the
audio system will disable itself. The
next time you turn on the radio you
will see ‘‘ENTER CODE ’’in the
frequency display. Use the preset
buttons to enter the digit code (see
page 305).
Checking the Battery
541
Maintenance
10/06/29 11:59:04 11 ACURA MDX MMC North America Owner's M 50 31STX640 enu

PRIMARY UNDER-HOOD FUSE BOX
No. Amps. Circuits Protected1 120 A Main fuse － Not Used
2 － 1 － Not Used
2 － 2 30 A SH-AWD
2 － 3 30 A Rear Blower Motor
2 － 4 40 A ABS VSA
2 － 5 40 A Trailer Main
2 － 6 40 A Power Seats, Driver's Position
Memory System, Subwoofer,
Telescopic Steering Wheel
2 － 7 40 A Front Heated Seat, TPMS,
Moonroof, Driver's Lumbar
Support
2 － 8 － Not Used
3 － 1 60 A Fog Lights, Front Blower
Motor, Interior Light
3 － 2 40 A Headlights, Daytime Running
Lights
3 － 3 60 A Cooling Fan, Condenser Fan,
MG Clutch, Headlight
Washer
ꭧ1
3－ 4 50 A Ignition Switch Main
ꭧ 1: Canadian model
ꭧ 2: If equipped No. Amps. Circuits Protected
3 － 5 50 A Power Window
3 － 6 60 A Power Tailgate Opener/Closer,
Rear ACC Socket, Interior
Light,
Rear Defroster
3 － 7 30 A ECU (PCM)
3 － 8 30 A TECH
4 40 A Audio, Door Lock, Interior Lights, Front ACC Socket
5 30 A EPT-L
ꭧ 2
6 30 A EPT-R
ꭧ2
7 30 A Active Damper Control Unit
ꭧ2
8 30 A Audio Amplifier
9 7.5 A Battery Sensor
10 15 A Hazard
11 15 A Horn, Stop
12 20 A ABS VSA
13 20 A Trailer (Brake)
14 20 A Rear Heated Seat
ꭧ 2
15 20 A A/C Inverter
CONTINUED
Fuse Locations
563
Taking Care of the Unexpected
10/06/29 11:59:04 11 ACURA MDX MMC North America Owner's M 50 31STX640 enu

Onboard Refueling Vapor
Recovery
The onboard refueling vapor
recovery (ORVR) system captures
the fuel vapors during refueling. The
vapors are adsorbed in a canister
filled with activated carbon. While
driving, the fuel vapors are drawn
into the engine and burned off.
Exhaust Emissions Controls
The exhaust emissions controls
include four systems: PGM-FI,
ignition timing control, exhaust gas
recirculation, and three way catalytic
converter. These four systems work
together to control the engine's
combustion and minimize the
amount of HC, CO, and NOx that
come out the tailpipe. The exhaust
emissions control systems are
separate from the crankcase and
evaporative emissions control
systems.
PGM-FI SystemThe PGM-FI system uses sequential
multiport fuel injection. It has three
subsystems: air intake, engine
control, and fuel control. The
powertrain control module (PCM)
uses various sensors to determine
how much air is going into the
engine. It then controls how much
fuel to inject under all operating
conditions.Ignition Timing Control SystemThis system constantly adjusts the
ignition timing, reducing the amount
of HC, CO, and NOx produced.Exhaust Gas Recirculation (EGR)SystemThe exhaust gas recirculation (EGR)
system takes some of the exhaust
gas and routes it back into the intake
manifold. Adding exhaust gas to the
air/fuel mixture reduces the amount
of NOx produced when the fuel is
burned.
Three Way Catalytic ConverterThe three way catalytic converter is
in the exhaust system. Through
chemical reactions, it converts HC,
CO, and NOx in the engine's exhaust
to carbon dioxide (CO
2), nitrogen
(N
2), and water vapor.
Replacement Parts
The emissions control systems are
designed and certified to work
together in reducing emissions to
levels that comply with the Clean Air
Act. To make sure the emissions
remain low, you should use only new
Acura replacement parts or their
equivalent for repairs. Using lower
quality parts may increase the
emissions from your vehicle.
The emissions control systems are
covered by warranties separate from
the rest of your vehicle. Read your
warranty manual for more
information.
Emissions Controls
581
Technical Information
10/06/29 11:59:04 11 ACURA MDX MMC North America Owner's M 50 31STX640 enu