engine HONDA ACCORD SEDAN 2021 (in English) Owners Manual

437
uuWhen Driving uAuto Idle Stop*
Continued
Driving
Auto Idle Stop*
To help maximize fuel economy, the engine automatically stops when the vehicle
comes to a stop, depending on environmental and vehicle operating conditions. The
indicator (green) comes on at this time.
The environmental and vehicle conditions that
impact Auto Idle Stop system operation are
varied.
2Auto Idle Stop Activates When: P. 439
The engine then restarts once the vehicle is
about to move again, and the indicator
(green) goes off.
2The Engine Automatically Restarts When:
P. 441
If the driver’s door is opened while the
indicator (green) come s on, a buzzer sounds
to notify you that the Auto Idle Stop function
is in operation.
1 Auto Idle Stop*
The 12-volt battery insta lled in this vehicle is
specifically designed for a m odel with Auto Idle Stop.
Using a 12-volt battery other than this specified type
may shorten the 12-volt ba ttery life, and prevent
Auto Idle Stop from activati ng. If you need to replace
the 12-volt battery, make sure to select the specified
type. Ask a dealer for more details.
The duration of the Au to Idle Stop operation:
•Increase in the ECON mode, compared to when the
ECON mode is off, with climate control in use.
2 ECON Mode P. 436
Auto Idle Stop
Indicator (Green)
* Not available on all models

uuWhen Driving uAuto Idle Stop*
438
Driving
To turn the Auto Idle Stop system off, press
this button. The Auto Idle Stop system stops.
u Auto Idle Stop system will stop and the
indicator (amber) will come on.
The Auto Idle Stop syst em is turned on every
time you start the engine, even if you turned it
off the last time you drove the vehicle.
■Auto Idle Stop System ON/OFF1 Auto Idle Stop System ON/OFF
If you turn off the Auto Idle Stop system while it is
activated, the engine will restart.
Auto Idle Stop
OFF Button
Auto Idle Stop System
Indicator (Amber)

Continued439
uuWhen Driving uAuto Idle Stop*
Driving
The vehicle stops with the shift position in (D and the brake pedal depressed.
When you shift into
(P quickly with depressing the brake pedal, the Auto Idle Stop
continues to operate, even if the brake pedal is released. u If you move the shift lever slowly, the engine may automatically restarts.
■Auto Idle Stop does not activate when:
• The Auto Idle Stop OFF button is pressed.
• The driver’s seat belt is not fastened.
• The engine coolant temperature is low or high.
• The engine is started with the hood open.
u Turn off the engine. Close the hood before you restart the engine to activate
Auto Idle Stop.
• The battery charge is low.
• The internal temperature of the battery is 41°F (5°C) or less.
• The transmission fluid temperature is low or high.
• The transmission is in a position other than
(D.
• The vehicle comes to a stop again before the vehicle speed reaches 3 mph (5 km/h)
after the engine starts.
• Stopped on a steep incline.
• is on (indicator on).
• The climate control system is in use, and the temperature is set to Hi or Lo .
• The climate control system is in use, and the outside temperature is below -4°F
(-20°C) or over 104°F (40°C).
■Auto Idle Stop Activates When:1 Auto Idle Stop Activates When:
Do not open the hood while the Auto Idle Stop
function is activated.
If the hood is opened, the engine will not restart
automatically.
In this case, restart the engine with the ENGINE
START/STOP button.
2 Starting the Engine P. 414
When ACC with Low Speed Follow is in operation,
the vehicle stops without de pressing the brake pedal
and Auto Idle Stop may activate.
In such cases, the engine may restart if you change
the shift position other than
( D.
Pressing the ENGINE START/STOP button causes
the engine to no longer restar ts automatically. Follow
the standard procedure to start the engine.
2 Starting the Engine P. 414

441
uuWhen Driving uAuto Idle Stop*
Driving
• The brake pedal is released (without the automatic brake hold system activated).
• The accelerator pedal is depressed (with th e automatic brake hold system activated).
2Automatic Brake Hold P. 515
■The engine restarts even if the brake pedal is depressed*1 when:
• The Auto Idle Stop OFF button is pressed.
• A steering wheel is operated.
• The transmission is put into
(R, (S*, and (L*, or when it is set from (N to (D.
u If you put the tra nsmission into
(P after the Auto Idle Stop activates, the Auto
Idle Stop continues to operate. In this case, the engine restarts when you move
the shift lever other than
(P. When operating the shift lever, the brake pedal
must be firmly depressed.
• The pressure on the brake pedal is reduced and the vehicle starts moving while
stopped on an incline.
• The brake pedal is released slightly during a stop.
• The battery charge becomes low.
• The accelerator pedal is depressed.
• The driver’s seat belt is unlatched.
• is on (indicator on).
• The climate control system is in use, and the difference between the set
temperature and actual interior temperature becomes significant.
• The climate control system is being used to dehumidify the interior.
• The vehicle ahead of you starts again when your vehicle stops automatically with
ACC with Low Speed Follow.
Briefly keeps the brake applied after releasin g the brake pedal to restart the engine.
This can keep your vehicle from unexpe ctedly moving while on an incline.
■The Engine Automatically Restarts When:
■Starting Assist Brake Function
1The Engine Automatically Restarts When:
If you are using an electroni c device during Auto Idle
Stop, the device may tempor arily be turned off when
the engine restarts.
1 The engine restarts even if the brake pedal is depressed*1 when:
*1: With the automatic brak e hold system activated,
you can release the brake pedal while Auto Idle Stop
is in operation.
If the automatic brake hold system has been turned
off, or if there is a problem with the system, the
engine will restart automatically when you release
the brake pedal.
2 Automatic Brake Hold P. 515
* Not available on all models

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

445
uuWhen Driving uAgile Handling Assist
Driving
Agile Handling Assist
Lightly brakes the front wheels, as needed , when you turn the steering wheel, and
helps support the vehicle’s stability and performance during cornering.1 Agile 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.

Continued453
uuWhen Driving uBlind spot information System*
Driving
■When the system detects a vehicle
Blind spot information System Alert Indicator:
Located on the outside rearview mirror on
both sides.
Comes on when:
•A vehicle enters the alert zone from behind
to overtake you with a speed difference of
no more than 31 mph (50 km/h) from your
vehicle.
• You pass a vehicle with a speed difference
of no more than 12 mph (20 km/h).
Blinks and a beeper sounds when:
You move the turn signal lever in the direction
of the detected vehicle. The beeper sounds
three times.1 Blind spot information System*
The system is for your convenience only. Even if an
object is within the alert zone, the following
situations may occur.
•The blind spot informatio n system alert indicator
may not come on due to obstruction (splashes,
etc.) even without the Blind Spot Information
System Not Available driver information
interface appearing.
•The blind spot informatio n system alert indicator
may come on even with the message appearing.
You can change the setting for the blind spot
information system. 2 Customized Features P. 352
The system does not operate when in
( R.
Turn the system off when towing a trailer.
The system may not work properly for the following
reasons:
•The added mass tilts the vehicle and changes the
radar coverage.
•The trailer itself can be detected by the radar
sensors, causing the blind spot information system
alert indicators to come on.
2.0 L engine models
Comes On
Blinks
* Not available on all models

uuWhen Driving uBlind spot information System*
454
Driving
■Blind spot information System On and Off
When you turn the blind spot information
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.
The blind spot information system is in the
previously selected ON or OFF setting each
time you start the engine.1 Blind spot information System*
The blind spot information system may be adversely
affected when:
•Objects (guard rails, poles, trees, etc,.) are
detected.
•An object that does not re flect radio waves well,
such as a motorcycle, is in the alert zone.
•Driving on a curved road.•A vehicle is moving from a far lane to the adjacent
lane.
•The system picks up external electrical interference.•The rear bumper or the sensors have been
improperly repaired or the rear bumper has been
deformed.
•The orientation of the sensors has been changed.
•In bad weather (Heavy rain, snow, and fog).
•Making a turn at an intersection.•Driving on a bumpy road.
•Making a short turn that slightly tilts the vehicle.
For a proper blind spot in formation system operation:
•Always keep the rear bumper corner area clean.
•Do not cover the rear bumper corner area with
labels or stickers of any kind.
•Take your vehicle to a dealer if you need the rear
bumper corner area or the radar sensors to be
repaired, or the re ar bumper corner area is strongly
impacted.
Left Selector Wheel
Safety Support Switch
* Not available on all models

Continued461
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