light Acura RLX 2015 Manual Online

375
uuWhen Driving uLane Keeping Assist System (LKAS)
*
Driving
The system may not detect lane markings and the position of your vehicle properly
under the following conditions.■
LKAS Limitations
Condition
●The vehicle interior is reflected onto the front windshield.●Headlight lenses are dirty or the headlights are not properly adjusted.●The windshield is fogged.●Driving on snowy or wet roads.●The ambient brightness suddenly changes (e.g., at the entrance or exit of a tunnel).●You drive into the low sun (e.g., at dawn or dusk).●A strong light is reflected onto the roadway.●Roadway lane markers are difficult to see due to weather (rain, snow, fog, etc.) or road conditions.●Driving on a road with temporary lane markings.●Multiple or varied lane markings are visible on the roadway due to road repairs or old lane markings.●Roadway objects or structures are misinterpr eted as lane markers.●There is little contrast between lane lines and the roadway surface.●The vehicle in front of you is driving near the lane lines.●Driving over bumps.●Where marked lanes merge or split.●Where the lane is extremely narrow, wide or changing.●Where the road is hilly or the vehicle is approaching the crest of a hill.

378
uuWhen Driving uAgile Handling Assist System
Driving
Agile Handling Assist SystemLightly brakes each of the front and rear wheels, as needed, when you turn the
steering wheel, and helps support the vehicle’s stability and performance during
cornering.Precision All Wheel Steer SystemMonitors road conditions while you are driving. In response to current driving
conditions, the system automatically makes slight adjustment to the relative rear
wheel toe settings to help enhance vehicle control and stability.
1Agile Handling Assist System
The agile handling assist system cannot enhance
stability in all driving situations. You still need to drive
and corner at speeds appropriate for the conditions
and always leave a suffi cient margin of safety.
When the VSA ® system indicator comes on and stays
on while driving, the agile handling assist system
does not activate.
You may hear a sound coming from the engine
compartment while the system is activated. This is
normal.1 Precision All Wheel Steer System
The Precision All Wheel Steer System cannot enhance
vehicle control and stability in all driving situations.
You still need to drive and corner at speeds
appropriate for the conditions and always leave a
sufficient margin of safety.
The toe setting of the rear wheels may get stuck in a
non-centered setting if the system malfunctions
while driving. This can cause the vehicle to pull to a
side even as you keep the steering wheel in the
center position. If this occurs, the system
automatically limits the vehicle speed to a maximum
of 50 mph (80 km/h). Reduce your speed and be
extra cautious, as handling may be difficult. Go to a
dealer immediately.

uuWhen Driving uTire Pressure Monitoring System (TPMS)
382Driving
To select the tire pressure monitor, set the power
mode to ON, and roll the right selector wheel
until you see the tire pressure screen.The pressure for each tire is displayed in PSI
(U.S.) or kPa (Canada).
Tire Pressures Low /CHECK TIRE PRESSURE
is displayed when a tire has significantly low
pressure. The specific tire is displayed on the
screen.
■
Tire Pressure Monitor
1 Tire Pressure Monitor
The pressure displayed on the multi-information
display can be slightly diffe rent from the actual
pressure as measured by a gauge. If there is a
significant difference between the two values, or if
the low tire pressure/TPMS indicator and the message
on the multi-information display do not go off after
you have inflated the tire to the specified pressure,
have the system checked by a dealer.
Tire Pressure Monitor Problem /CHECK TPMS
SYSTEM may appear if you drive with the compact
spare tire
*, or there is a problem with the TPMS.
Models with
navigation
system
Models without
navigation
system
Models with
navigation
system
Models without
navigation
system
* Not available on all models

385
Continued
Driving
BrakingBrake SystemUse the parking brake to keep the vehicle stationary when parked. You can
manually apply and release, or automatically release it.■Manual operations
Use the electric parking brake switch to apply or release the brake. Manually
releasing the parking brake using the switch helps your vehicle start slowly and
smoothly when facing down hill on steep hills.
■To apply manually
Pull the electric parking brake switch up gently
and securely. u The electric parking brake indicator
comes on.■To release manually
1. Depress the brake pedal.
2. Press the electric parking brake switch.
u The electric parking brake indicator goes
off.
■
Parking Brake
1Parking Brake
You may hear the elect ric parking brake system
motor operating from the rear wheel area when you
apply or release the parking brake, or set the power
mode to OFF. This is normal.
The brake pedal may slightly move due to the electric
parking brake system operation when you apply or
release the parking brake. This is normal.
You cannot apply or release the parking brake if the
battery goes dead. 2 Jump Starting P. 477
If you pull up the electric parking brake switch while
driving, the parking brake is applied.
In the following situations, the parking brake
automatically operates.•When the vehicle stops more than 10 minutes
while ACC with LSF is activated.•When the driver’s seat belt is unfastened while
your vehicle is stopped automatically by ACC with
LSF.•When the engine is turned off while ACC with LSF
is activated.•When the vehicle stops with the automatic brake
hold system activated for more than 10 minutes.
Electric Parking
Brake SwitchElectric Parking
Brake Switch

Continued
387
uuBraking uBrake System
Driving
Your vehicle is equipped with disc brakes at all four wheels. A vacuum power assist
helps reduce the effort needed on the brake pedal. The brake assist system increases
the stopping force when you depress the brake pedal hard in an emergency
situation. The anti-lock brake system (ABS) helps you retain steering control when
braking very hard.2 Brake Assist System P. 391
2 Anti-lock Brake System (ABS) P. 390■
Foot Brake
1Foot Brake
Check the brakes after driving through deep water,
or if there is a buildup of road surface water. If
necessary, dry the brakes by lightly depressing the
pedal several times.
If you hear a continuous metallic friction sound when
applying the brakes, the brake pads need to be
replaced. Have the vehicle checked by a dealer.
Constantly using the brake pedal while going down a
long hill builds up heat, which reduces the brake
effectiveness. Apply engine braking by taking your
foot off the accelerator pedal and downshifting to a
lower gear.
Do not rest your foot on the brake pedal while
driving, as it will lightly apply the brakes and cause
them to lose effectiveness over time and reduce pad
life. It will also confuse drivers behind you.
Your vehicle is equipped with a hydraulic brake
booster that, under certain conditions, such as
braking at high altitudes, supplements the vacuum
power assist. When the hydraulic brake booster
activates, you may hear a motor sound and a slight
vibration in the pedal. This is normal.

uuBraking uBrake System
388Driving
Keeps the brake applied after releasing the brake pedal until the accelerator pedal is
pressed. You can use this system while the vehicle is temporarily stopped, such as
when you stop at a traffic light.■
Automatic Brake Hold
1Automatic Brake Hold
3
WARNING
Activating the automatic brake hold system
on steep hills or slippery roads may still
allow the vehicle to move if you remove
your foot from the brake pedal.
If a vehicle unexpec tedly moves, it may
cause a crash resulting in serious injury or
death.
Never activate the automatic brake hold
system or rely on it to keep a vehicle from
moving when stopped on a steep hill or
slippery roads.
3
WARNING
Using the automatic brake hold system to
park the vehicle may result in the vehicle
unexpectedly moving.
If a vehicle moves unexpectedly, it may
cause a crash, resulting in serious injury or
death.
Never leave the vehicle when braking is
temporarily kept by automatic brake hold
and always park the vehicle by putting the
transmission in
( P and applying the parking
brake.
■Turning on the system
Fasten your seat belt
properly, then start the
engine. Press the
automatic brake hold
button.●The automatic brake
hold system indicator
comes on. The system
is turned on.
■Activating the system
Depress the brake pedal
to come to a complete
stop. The shift lever must
be in
( D or
(N.
●The automatic brake
hold indicator comes
on. Braking is kept for
up to 10 minutes.●Release the brake
pedal after the
automatic brake hold
indicator comes on.
■Canceling the system
Depress the accelerator
pedal while the shift
lever is in
( D or
(R. The
system is canceled and
the vehicle starts to
move.
●The automatic brake
hold indicator goes
off. The system
continues to be on.Accelerator Pedal
Brake Pedal
Automatic Brake
Hold Button
Goes
Off
On On On
On
On
U.S.
Canada

390
uuBraking uAnti-lock Brake System (ABS)
Driving
Anti-lock Brake System (ABS)Helps prevent the wheels from locking up, and help s you retain steering control by
pumping the brakes rapidly, much faster than you.
The electronic brake distribution (EBD) system, which is part of the ABS, also
balances the front-to-rear braking distribution according to vehicle loading.
You should never pump the brake pedal. Let the ABS work for you by always
keeping firm, steady pressure on the brake pedal. This is sometimes referred to as
“stomp and steer.”■ABS operation
The brake pedal may pulsate slightly when the ABS is working. Keep holding the
pedal firmly down. On dry pavement, you will need to press on the brake pedal very
hard before the ABS activates. However, you may feel the ABS activate immediately
if you are trying to stop on snow or ice.
When the vehicle speed goes under 6 mph (10 km/h), the ABS stops.■
ABS
1 Anti-lock Brake System (ABS)NOTICEThe ABS may not function correctly if you use an
incorrect tire type and size.
When the ABS indicator comes on while driving,
there may be a problem with the system.
While normal braking is not affected, there is a
possibility of the ABS not operating. Have the vehicle
checked by a dealer immediately.
The ABS does not reduce the time or distance it takes
to stop the vehicle. It only helps with steering control
during hard braking.
In the following cases, your vehicle may need more
stopping distance than a vehicle without the ABS:•When driving on rough road surfaces, including
when driving on uneven surfaces, such as gravel or
snow.•When tire chains are installed.
You may hear a motor sound coming from the
engine compartment while system checks are being
performed immediatel y after starting the engine or
while driving. This is normal.

391
uuBraking uBrake Assist System
Driving
Brake Assist SystemDesigned to assist the driver by generating greater braking force when you depress
the brake pedal hard during emergency braking.■Brake assist system operation
Press the brake pedal firmly for more powerful braking.
When brake assist operates, the pedal may wiggle slightly and an operating noise
may be heard. This is normal. Keep holding the brake pedal firmly down.■
Brake Assist System

Continued
393
uuBraking uCollision Mitigation Braking System
TM (CMBS
TM)*
Driving
■When the system activates
1When the system activates
The heads-up warning uses a lens located at the front
end of the dashboard.
Do not cover the lens or spill any liquid on it.
Lens
The system provides visual and audible alerts of a possible collision, and stops
if the collision is avoided.
u Take appropriate action to prevent a collision (apply the brakes, change
lanes, etc.)
Beep
Heads-up
Warning
Lights
Visual Alerts
Audible Alert

395
uuBraking uCollision Mitigation Braking System
TM (CMBS
TM)*
Continued
Driving
Stage
three
The risk of a
collision has
increased, time to
respond is
reduced.
Retracts the driver’s seat
belt gently a few times,
providing a physical
warning.
Visual and audible alerts.
Lightly
applied
Stage four
The CMBS
TM
determines that a
collision is
unavoidable.
Forcefully tightens driver
and front passenger seat
belts.
Forcefully applied
Distance between vehicles
CMBS
TM
The radar sensor detects a vehicle
E-pretensioner
Audible & Visual WARNINGS
Braking
Your
Vehicle Vehicle
Ahead
Your
VehicleVehicle
Ahead