2021 HONDA ACCORD SEDAN check engine

443
uuWhen Driving uVehicle Stability AssistTM (VSA ®), aka Electronic Stability Control (ESC), System
Continued
Driving
Vehicle Stability AssistTM (VSA ®), aka Electronic
Stability Control (ESC), System
VSA ® helps stabilize the vehicle during cornering if the vehicle turns more or less
than what was intended. It also assists in maintaining traction on slippery surfaces.
It does so by regulating engine ou tput and selectively applying the brakes.
When VSA ® activates, you may notice that the
engine does not respond to the accelerator.
You may also notice some noise from the
hydraulic brake system. You will also see the
indicator blink.
■VSA ® Operation
1 Vehicle Stability AssistTM (VSA® ), aka Electronic Stability Control
(ESC), System
The VSA ® may not function properl y if tire type and
size are mixed. Make sure to use the same size and
type of tire, and the air pressures as specified.
When the VSA ® system indicator comes on and stays
on while driving, there ma y be a problem with the
system. While this may not interfere with normal
driving, have your vehi cle checked by a dealer
immediately.
VSA ® cannot enhance stability in all driving situations
and does not control the entire braking system. You
still need to drive and corner at speeds appropriate
for the conditions and always leave a sufficient
margin of safety.
The main function of the VSA ® system is generally
known as Electronic Stability Control (ESC). The
system also includes a traction control function.
The Vehicle Stability Assist
TM (VSA ®) system, Vehicle
Stability AssistTM (VSA ®) OFF, adaptive cruise control
(ACC) with Low Speed Follow, safety support and
low tire pressure/TPMS indicators may come on in
amber along with a message in the driver information
interface when you set the power mode to ON after
reconnecting the battery.
Drive a short distance at more than 12 mph (20 km/h).
Each indicator should go off. If any do not, have your
vehicle checked by a dealer.
VSA ® System
Indicator

uuWhen Driving uVehicle Stability AssistTM (VSA ®), aka Electronic Stability Control (ESC), System
444
Driving
This button is on the driver side control panel.
To partially disable VSA ® functionality/features,
press and hold it until you hear a beep.
Your vehicle will have normal braking and
cornering ability, but traction control function
will be less effective.
To restore VSA ® functionality/features, press
the (VSA ® OFF ) button until you hear a
beep.
VSA ® is turned on every time you start the
engine, even if you turned it off the last time
you drove the vehicle.
■VSA ® On and Off1 Vehicle Stability AssistTM (VSA ®), aka Electronic Stability Control
(ESC), System
In certain unusual conditions when your vehicle gets
stuck in shallow mud or fr esh snow, it may be easier
to free it with the VSA ® temporarily switched off.
When the button is pressed, the traction control
function becomes less effective. This allows for the
wheels to spin more freely at low speed. You should
only attempt to free your vehicle with the VSA ® off if
you are not able to free it when the VSA ® is on.
Immediately after freeing your vehicle, be sure to
switch VSA ® on again. We do not recommend driving
your vehicle with the VSA ® system switched off.
You may hear a motor sound coming from the
engine compartment while system checks are being
performed immediately after starting the engine or
while driving. This is normal.
VSA ® OFF Indicator

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uuHonda Sensing ®u Collision Mitigation Braking SystemTM (CMBSTM)
Driving
When you turn the CMBSTM on and off, do the
following.
1. Press the safety support switch.
2. Roll the left selector wheel to the
symbol and push it.
u The message appears on the driver
information interface when the system
becomes on or off.
The CMBS
TM is turned on every time you start
the engine, even if you turned it off the last
time you drove the vehicle.
■CMBSTM On and Off1 CMBSTM On and Off
The CMBS
TM may automatically shut off, and the
safety support indicator (amb er) will come and stay
on under certain conditions:
2 CMBS
TM Conditions and Limitations P. 462
When the CMBS
TM is activated, it will continue to
operate even if the accele rator pedal is partially
depressed. However, it w ill be canceled if the
accelerator pedal is fully depressed.
The Vehicle Stability Assist
TM (VSA ®) system, Vehicle
Stability AssistTM (VSA ®) OFF, adaptive cruise control
(ACC) with Low Speed Follow, safety support and
low tire pressure/TPMS indicators may come on in
amber along with a message in the driver information
interface when you set the power mode to ON after
reconnecting the battery.
Drive a short distance at more than 12 mph (20 km/h).
Each indicator should go off. If any do not, have your
vehicle checked by a dealer.
Left Selector Wheel
Safety Support Switch

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uuHonda Sensing ®u Low Speed Braking Control*
Driving
When you turn the system on and off, do the
following.
1. Press the safety support switch.
2. Roll the left selector wheel to the
symbol and push it.
u The message appears on the driver
information interface when the system
turns on or off.
The system is turned on every time you start
the engine, even if you turned it off the last
time you drove the vehicle.
■System On and Off 1 System On and Off
If the battery is disconnected and reconnected, the
Low Speed Braking Control may not turn on right
away when you start the engine.
The system will automatically turn ON after the
vehicle has been moving at over 12mph (20km/h) for
some time.
If the system does not turn on, have your vehicle
checked by a dealer.
Left Selector Wheel
Safety Support Switch

uuHonda Sensing ®u Road Departure Mitigation (RDM) System
498
Driving
When you turn the RDM on and off, do the
following.
1. Press the safety support switch.
2. Roll the left selector wheel to the
symbol and push it.
u The message appears on the driver
information interface when the system
becomes on or off.
The RDM is in the previously selected ON or
OFF setting each time you start the engine.
The system may not properly detect lane markings and the position of your vehicle
under certain conditions. Some examples of these conditions are listed below.
■Environmental conditions
• Driving in bad weather (rain, fog, snow, etc.).
• Sudden changes between light and dark, such as an entrance or exit of a tunnel.
• There is little contrast between la ne lines and the roadway surface.
• Driving into low sunlight (e.g., at dawn or dusk).
• Strong light is reflected onto the roadway.
• Driving in the shadows of trees, buildings, etc.
• Shadows of adjacent objects are parallel to lane markings.
• Roadway objects or structures are misinterpreted as lane markers.
• Reflections on the interi or of the windshield.
• Driving at night or in a dark condition such as a tunnel.
■RDM On and Off1RDM On and Off
When you have selected Warning Only from the
customized options using the audio/information
screen, the system does not operate the steering
wheel and braking. 2 Customized Features P. 352
The Vehicle Stability Assist
TM (VSA ®) system, Vehicle
Stability AssistTM (VSA ®) OFF, adaptive cruise control
(ACC) with Low Speed Follow, safety support and
low tire pressure/TPMS indicators may come on in
amber along with a message in the driver information
interface when you set the power mode to ON after
reconnecting the battery.
Drive a short distance at more than 12 mph (20 km/h).
Each indicator should go off. If any do not, have your
vehicle checked by a dealer.
Safety Support Switch Left Selector Wheel
■RDM Conditions and Limitations

uuBraking uBrake System
512
Driving
■Automatic parking brake feature operation
If the automatic parking brake feature has been activated:
• The parking brake is applied automatica lly when you set the power mode to
VEHICLE OFF.
• To confirm that the parking brake is appl ied, check if the parking brake and brake
system indicator (red) is on.
2 Activating and deactivating the automatic parking brake feature P. 513
■To release automatically
Depressing the accelerator pedal releases the parking brake.
Use the accelerator pedal to release th e brake when you are starting the vehicle
facing uphill, or in a traffic jam. Gently depress the accelerator pedal.
When on a hill, it may require more
accelerator input to release.u The parking brake and brake system
indicator (red) goes off.
You can release the parki ng brake automatically when:
• You are wearing the driver’s seat belt.
• The engine is running.
• The transmission is not in
(P or (N.
1Parking Brake
If the parking brake cannot be released
automatically, release it manually.
When the vehicle is travel ing uphill, the accelerator
pedal may need to be pressed farther to
automatically release the electric parking brake.
The parking brake cannot be released automatically
while the following indicators are on:
•Malfunction indicator lamp•Transmission system indicator
The parking brake may not be released automatically
while the following indicators are on:
•Parking brake and bra ke system indicator
•VSA® system indicator•ABS indicator
•Supplemental restraint system indicator
Accelerator Pedal

Continued513
uuBraking uBrake System
Driving
■Activating and deactivating the automatic parking brake feature
With the power mode is in ON, carry out th e following steps to either activate or
deactivate the automatic parking brake feature.
1. Put the transmission into
(P.
2. Without depressing the brake pedal, pull up and release the electric parking brake
switch.
u Check that the parking brake and brake sy stem indicator (red) has come on.
3. Pull up and hold the electric parking br ake switch. When you hear a beeping
sound, release the switch and within 3 seconds pull up and hold the switch again.
4. When you hear a sound indicating that the procedure is completed, release the
switch.
u Two beeps indicates that the feature has been activated.
u One beep indicates that the feature has been deactivated.
u When you have completed activating the feature, the parking brake will
remain applied after you turn off the engine.
u To confirm that the parkin g brake is applied, check if the parking brake and
brake system indicator (red) is on.
If you need to temporarily deactivate th e feature for when putting your vehicle
through a conveyor type car wash, you can follow the procedure explained below.
1. Depress the brake pedal and bring the vehicle to a stop.
2. Set the power mode to VEHICLE OFF and then within 2 seconds push down the
electric parking brake switch.
u Activation and deactivation settings for the feature will not be affected.
u Before temporarily deactivating the feat ure, make sure to first turn off both
ACC with Low Speed Follow and the automatic brake hold system.
u To confirm that the parkin g brake is applied, check if the parking brake and
brake system indicator (red) is on.
1 Parking Brake
In cold climates, the parking brake may freeze in
place if applied.
When parking the vehicle, chock the wheels and
make sure the automatic parking brake feature is
deactivated.
Also, when putting your vehicle through a conveyor-
type car wash or when ha ving your vehicle towed,
deactivate the automatic parking brake feature and
leave the parking brake released.
Automatic transmission models

uuBraking uBrake System
514
Driving
Your vehicle is equipped with disc brakes at all four wh eels. 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. 519
2 Anti-lock Brake System (ABS) P. 518
■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 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 pe dal and downshifting to a
lower gear/speed position.
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.
Whenever the brakes are activated by CMBS
TM or
another system that automa tically controls braking,
the brake pedal is depressed and released in
accordance with braking function.