steering Acura TLX 2020 Repair Manual

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uuWhen Driving uRoad Departure Mitigation (RDM) System
Driving
Press the RDM button to turn the system on
and off.
u The indicator in the button comes on and
the message appears on the multi-
information display when the system is
on.
■RDM On and Off1 RDM On and Off
When you have selected Warning Only from the
customized options using th e information screen or
multi-information display, the system does not
operate the steering wheel and braking.
2 Customized Features P. 120, 292
RDM Button
Indicator
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410
uuWhen Driving uLane Keeping Assist System (LKAS)
Driving
Lane Keeping Assist System (LKAS)
Provides steering input to help keep the vehicle in the middle of a detected lane and
provides tactile and visual alerts if the ve hicle is detected drifting out of its lane.1Lane Keeping Assist System (LKAS)
Important Safety Reminders
The LKAS is for your convenience only. It is not a
substitute for your vehicle control. The system does
not work if you take y our hands off the steering
wheel or fail to steer the vehicle.
2 Multi-Information Display Warning and
Information Messages P. 105
Do not place objects on the instrument panel.
Objects may reflect on th e windshield and prevent
correct detection of the traffic lanes.
The LKAS only alerts you when lane drift is detected
without a turn signal in use. The LKAS may not detect
all lane markings or lane departures; accuracy will
vary based on weather, speed, and lane marker
condition. It is always your responsibility to safely
operate the vehicle an d avoid collisions.
The LKAS is convenient when it is used on freeways.
The LKAS may not work properly or may work
improperly under the certain conditions: 2 LKAS Conditions and Limitations P. 416
You can read about handling information for the
camera equipped with this system. 2 Front Sensor Camera P. 388
The LKAS may not function as designed while driving
in frequent stop and go traf fic, or on roads with
sharp curves.
■Steering input assist
When you operate the turn signals to chan ge lanes, the system is suspended, and
resumes after the signals are off.
If you make a lane change without operat ing the turn signals, the LKAS alerts
activate, and torque is applied to the steering.
■Front Sensor
Camera
Monitors the lane
lines
The system applies torque to the steering to keep the vehicle between the left and
right lane lines. The applied torque beco
mes stronger as the vehicle gets closer to
either of the lane lines.■Tactile and visual alerts
Rapid vibrations on the steering
wheel and a warning display alert
you that the vehicle is drifting out
of a detected lane.
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Continued411
uuWhen Driving uLane Keeping Assist System (LKAS)
Driving
Provides assistance to keep the vehicle in the center of the lane. When the vehicle
nears a white or yellow line, steering force of the electric power steering will become
stronger.
When the vehicle enters the warning area, the LKAS alerts you with slight steering
wheel vibration as well as a warning display.
■Lane Keep Support Function1 Lane Keeping Assist System (LKAS)
When it fails to detect lanes, the system will
temporarily be canceled. When a lane is detected, the
system will recover automatically.
■Lane Departure Warning Function
Warning Area
Warning Area
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415
uuWhen Driving uLane Keeping Assist System (LKAS)
Continued
Driving
■The LKAS may automatica lly be suspended when:
• The system fails to detect lane lines.
• The steering wheel is quickly turned.
• You fail to steer the vehicle.
• Driving through a sharp curve.
• Driving at a speed in excess of approximately 90 mph (145 km/h).
Once these conditions no longer exist, the LKAS automatically resumes.
■The LKAS may automatically be canceled when:
• The camera temperature gets extremely high or low.
• The camera behind the rearview mirror, or the area around the camera, including
the windshield, gets dirty.
• The ABS or VSA ® system engages.
The beeper sounds if the LKAS is automatically canceled.
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420
uuWhen Driving uAgile Handling Assist
Driving
Agile Handling Assist
Lightly 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 SteerTM (P-AWS® ) System*
Monitors road conditions while you are driving. In response to current driving
conditions, the system automatically makes s light adjustment to the relative rear
wheel toe settings to help enhanc e vehicle control and stability.
1Agile Handling Assist
The agile handling assist ca nnot enhance 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.
When the VSA ® system indicator comes on and stays
on while driving, the agil e handling assist does not
activate.
You may hear a sound coming from the engine
compartment while the agile handling assist is
activated. This is normal.
1 Precision All-Wheel SteerTM (P-AWS ®) System*
The Precision All-Wheel SteerTM (P-AWS ®) system
cannot enhance vehicle cont rol 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 se tting if the system malfunctions
while driving. This can caus e 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.
* Not available on all models
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uuBraking uBrake System
432
Driving
Your vehicle is equipped with disc brakes at all four wheels. A vacuum power assist
helps to 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. 436
2 Anti-lock Brake System (ABS) P. 435
■Foot Brake1Foot 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 me tallic friction sound when
applying the brakes, this is caused by the brake wear
indicator rubbing on the brake rotor and indicates
that the brake pads need to be replaced. Have the
vehicle checked by a deal er. If you hear only an
occasional squeak or squeal when you initially apply
the brake pedal, this may be normal and caused by
high frequency vibr ation of the brake pads against
the rotating brake disc.
Constantly using the brak e 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 pe dal 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 conf use drivers behind you.
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435
uuBraking uAnti-lock Brake System (ABS)
Driving
Anti-lock Brake System (ABS)
Helps prevent the wheels from locking up, and helps you retain steering control by
pumping the brakes rapidly, much faster than you.
The electronic brake distribu tion (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 pe dal. This is sometimes referred to as
“stomp and steer.”
■ABS operation
The brake pedal may pulsate slightly when the ABS is working. Depress the brake
pedal and keep holding the pedal firmly do wn. On dry pavement, you will need to
press on the brake pedal very hard before th e ABS activates. However, you may feel
the ABS activate immediately if you are trying to stop on snow or ice.
ABS may activate when you depres s the brake pedal when driving on:
• Wet or snow covered roads.
• Roads paved with stone.
• Roads with uneven surf aces, such as potholes, cracks, manholes, etc.
When the vehicle speed goes under 6 mph (10 km/h), the ABS stops.
■ABS1Anti-lock Brake System (ABS)
NOTICE
The ABS may not function correc tly if you use a tire of
the wrong size or type.
If the ABS indicator comes on while driving, there
may be a problem with the system.
While normal braking will not be affected, there is a
possibility that the ABS wi ll not be operating. Have
your vehicle checked by a dealer immediately.
The ABS is not designed for the purpose of reducing
the time or distance it takes for a vehicle to stop: It is
designed to limit brake lo ckup which can lead to
skidding and loss of steering control.
In the following cases, yo ur vehicle may need more
distance to stop than a vehicle without the ABS:
•You are driving on rough or uneven road surfaces,
such as gravel or snow.
•The tires are equipped with tire chains.
The following may be observed with the ABS system:
•Motor sounds coming from the engine
compartment when the brakes are applied, or
when system checks are being performed after the
engine has been started and while the vehicle
accelerates.
•Brake pedal and/or the ve hicle body vibration when
ABS activates.
These vibrations and sounds are normal to ABS
systems and are no cause for concern.
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437
uuBraking uCollision Mitigation Braking SystemTM (CMBSTM)
Continued
Driving
Collision Mitigation Braking SystemTM (CMBSTM)
Can assist you when there is a possibility of your vehicle colliding with a vehicle or a
pedestrian detected in front of yours. The CMBSTM is designed to alert you when a
potential collision is determined, as well as to reduce your vehicle speed to help
minimize collision severity when a collision is deemed unavoidable.
■How the system works
1 Collision Mitigation Braking SystemTM (CMBSTM)
Important Safety Reminder
The CMBS
TM is designed to reduce the severity of an
unavoidable collision. It do es not prevent a collision
nor stop the vehicle automati cally. It is still your
responsibility to operate the brake pedal and steering
wheel appropriately acco rding to the driving
conditions.
The CMBS
TM may not activate or may not detect a
vehicle in front of y our vehicle under certain
conditions: 2 CMBS
TM Conditions and Limitations P. 441
You can read about handling information for the
camera equipped with this system. 2 Front Sensor Camera P. 388
Be careful not to severely impact the radar sensor
cover.
The system starts monitoring the roadway ahead when your vehicle speed is about 3
mph (5 km/h) and there is a vehicle in front of you. The radar sensor is
behind the emblem.
The camera is
located behind the
rearview mirror.
When to use
The CMBSTM activates when:●The speed difference between your vehicl
e and a vehicle or pedestrian detected
in front of you becomes about 3 mph (5 km/h) and over with a chance of a
collision.
●Your vehicle speed is about 62 mph (100 km/h) or less and there is a chance of a
collision with an oncoming detected ve hicle or a pedestrian in front of you.
1How the system works
Rapid vibrations on the steering wheel alert you
when your vehicle speed is between 19 and 62 mph
(30 and 100 km/h) with an oncoming vehicle
detected in front of you.
When the CMBS
TM activates, it may automatically
apply the brake. It will be canceled when your vehicle
stops or a potential coll ision is not determined.
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uuBraking uCollision Mitigation Braking SystemTM (CMBSTM)
438
Driving
■When the system activates
At system’s earliest collision alert stage, you can change the distance ( Long/
Normal /Short) between vehicles at which aler ts will come on through multi-
information displa y setting options.
2List of customizable options P. 123, 300
■Vibration alert on the steering wheel
When a potential collision to an oncoming detected vehicle is determined, the
system alerts you with rapid vibration on the steering wheel, in addition to visual and
audible alerts.
u Take appropriate action to prevent a collision (apply the brakes, operate the
steering wheel, etc.).
1When the system activates
The camera in the CMBS
TM is also designed to detect
pedestrians.
However, this pedestrian detection feature may not
activate or may not detect a pedestrian in front of
your vehicle under certain conditions.
Refer to the ones indicating the pedestrian detection
limitations from the list. 2 CMBS
TM Conditions and Limitations P. 441
The head-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, audible and tactile 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
Head-up
Warning
Lights
Visual Alerts
Audible Alert
Tactile Alert
1 Vibration alert on the steering wheel
Vibration alert function is disabled when the electric
power steering (EPS) system indicator comes on. 2 Electric Power Steering (EPS) System
Indicator P. 79
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439
uuBraking uCollision Mitigation Braking SystemTM (CMBSTM)
Continued
Driving
The system has three alert stages for a possible collis ion. However, depending on circumstances, the CMBSTM may not go through all of
the stages before initiating the last stage.
■Collision Alert Stages
Distance between vehicles
CMBSTM
The radar sensor detects a vehicleAudible & Visual WARNINGSSteering WheelBraking
Stage one
There is a risk of a
collision with the vehicle
ahead of you.
When in Long, visual and
audible alerts come on at a
longer distance from a vehicle
ahead than in Normal setting,
and in Short , at a shorter
distance than in Normal.In case of an
oncoming vehicle
detected, rapid
vibration is
provided.
—
Stage two
The risk of a collision has
increased, time to
respond is reduced.
Visual and audible alerts.—
Lightly applied
Stage three
The CMBSTM determines
that a collision is
unavoidable.Forcefully applied
Your Vehicle Vehicle
Ahead
Normal
Short
Long
Your
Vehicle Vehicle
Ahead
Your
VehicleVehicle
Ahead
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