2021 HONDA CIVIC SEDAN sensor

55
uuAirbags uSide Airbags
Safe Driving
■When a side airbag deploys with little or no visible damage
Because the airbag system senses sudden acceleration, a strong impact to the side
of the vehicle’s framework can cause a side airbag to deploy. In such cases, there
may be little or no damage, but the side impact sensors detected a severe enough
impact to deploy the airbag.
■When a side airbag may not deploy, even though visible damage appears
severe
It is possible for a side airbag not to deploy during an impact that results in
apparently severe damage. This can occur when the point of impact was toward the
far front or rear of the vehicle, or when the vehicle’s crushable body parts absorbed
most of the crash energy. In either case , the side airbag would not have been
needed nor provided protection even if it had deployed.
21 CIVIC 4D HCM_HMIN_J (KA KL KC)-31TBA6500.book 55 ページ ２０２０年８月２５日　火曜日　午後２時６分

Continued59
uuAirbags uAirbag System Indicators
Safe Driving■When the passenger airbag off
indicator comes on
The indicator comes on to alert you that the
passenger’s airbag has been turned off.
This occurs if the seat is empty or when the
weight sensors determine that a small child or
infant is on the passenger seat.
Children age 12 or under shou ld always ride properly restrained in a back seat.
2Child Safety P. 62
If the indicator is on in the event of a cras h, the passenger’s airbag will not deploy.
■Passenger Airbag Off Indicator1Passenger Airbag Off Indicator
To ensure the passenger is detected properly, confirm
that:
•The occupant is sitting in an upright position,
wearing the seat belt prope rly and the seat back is
not excessively reclined.
•The occupant is not leaning against the door or
center console.
•The occupant’s feet are plac ed on the floor in front
of them.
•There are no objects ha nging from the front
passenger’s seat.
•Only small, lightweight objec ts are in the seat back
pocket.
•No liquid has been spille d on or under the seat.•There is no child seat or other object pressing
against the rear of the seat or seat back.
•There is no rear passenger pushing or pulling on
the back of the front passenger’s seat.
•There are no objects placed under or beside the
front passenger’s seat . Improperly positioned
objects can interfere with the advanced airbag
sensors.
•The floor mat behind the front passenger’s seat is
set in the correct position evenly on the floor. An
improperly placed mat can interfere with the
advanced airbag sensors.
•The head restraint is not contacting the roof.
U.S.
Canada
21 CIVIC 4D HCM_HMIN_J (KA KL KC)-31TBA6500.book 59 ページ ２０２０年８月２５日　火曜日　午後２時６分

61
uuAirbags uAirbag Care
Safe Driving
Airbag Care
You do not need to, and should not, perform any maintenance on or replace any
airbag system components yourself. However, you should have your vehicle
inspected by a dealer in the following situations:
■When the airbags have deployed
If an airbag has inflated, th e control unit and other related parts must be replaced.
Similarly, once an automatic seat belt te nsioner has been activated, it must be
replaced.
■When the vehicle has been in a moderate-to-severe collision
Even if the airbags did not inflate, have yo ur dealer inspect the following: the driver’s
seat position sensor, weight sensors in the passenger’s seat, front seat belt
tensioners, and each seat belt that was worn during the crash.
■Do not remove or modify a front seat without consulting a dealer
This would likely disable or affect the proper operation of the driver’s seat position
sensor or the weight sensors in the passenge r’s seat. If it is necessary to remove or
modify a front seat to accommodate a pe rson with disabilities, contact a Honda
dealer, or for U.S. vehicles, American Ho nda Automobile Customer Service at 1-800-
999-1009 and for Canadian vehicles, Hond a Canada Customer Relations at 1-888-
9-HONDA-9.
1 Airbag Care
We recommend against the use of salvaged airbag
system components, includi ng the airbag, tensioners,
sensors, and control unit.
21 CIVIC 4D HCM_HMIN_J (KA KL KC)-31TBA6500.book 61 ページ ２０２０年８月２５日　火曜日　午後２時６分

64
uuChild Safety uSafety of Infants and Small Children
Safe Driving
Safety of Infants and Small Children
An infant must be properly restrained in a rear-facing child seat until the infant
reaches the seat manufacturer’s weig ht or height limit for the seat.
■Positioning a rear-facing child seat
Child seats must be placed and secured in a
rear seating position.
When properly installed, a rear-facing child seat may prevent the driver or a front
passenger from moving their seat all the way back, or from locking their seat-back
in the desired position. Make sure that th ere is no contact between the child seat
and the seat in front of it.
It can also interfere with pr oper operation of the passenger’s advanced front airbag
system.
2 Airbags P. 46
If this occurs, we recommend that you install the child seat directly behind the front
passenger’s seat, move the seat as far fo rward as needed, and leave it unoccupied.
Or, you may wish to get a sm aller rear-facing child seat.
■Protecting Infants1Protecting Infants
Experts recommend use of a rear-facing seat for a
child so long as the child’ s height and weight are
appropriate for a rear-facing seat.
Infants should never be s eated in a forward-facing
position.
Always refer to the child seat manufacturer’s
instructions before installation.
Do not allow a front seat to rest against a child seat
installed in a rear seating position:
The weight sensor in the fr ont seat may not correctly
detect the actual weight of the occupant.
3WARNING
Placing a rear-facing child seat in the front
seat can result in serious injury or death
during a crash.
Always place a rear-fac ing child seat in the
rear seat, not the front.
21 CIVIC 4D HCM_HMIN_J (KA KL KC)-31TBA6500.book 64 ページ ２０２０年８月２５日　火曜日　午後２時６分

80
uuIndicators u
Instrument Panel
*1:Models with the smart entry system have an ENGINE START/STOP button instead of an ignition switch.
IndicatorNameOn/BlinkingExplanationMessage
Parking Brake
and Brake
System Indicator
(Amber)
●Comes on if there is a problem
with the radar sensor.
●Indicator may come on temporarily
when the Maximum Load Limit is
exceeded.
●Make sure the total load is within the
Maximum Load Limit.
2Maximum Load Limit P. 419●Stays on constantly - Have your vehicle
checked by a dealer.—
Automatic Brake
Hold System
Indicator
●Comes on for a few seconds when
you turn the igniti on switch to ON
(w*1, then goes off.●Comes on when the automatic
brake hold system is on.
2Automatic Brake Hold P. 497
Automatic Brake
Hold Indicator
●Comes on for a few seconds when
you turn the ignition switch to ON
(w*1, then goes off.●Comes on when the automatic
brake hold is activated.2Automatic Brake Hold P. 497—
U.S.
Canada
(Amber)
U.S.
Canada
21 CIVIC 4D HCM_HMIN_J (KA KL KC)-31TBA6500.book 80 ページ ２０２０年８月２５日　火曜日　午後２時６分

83
uuIndicators u
Continued
Instrument Panel
*1:Models with the smart entry system have an ENGINE START/STOP button instead of an ignition switch.
IndicatorNameOn/BlinkingExplanationMessage
Seat Belt
Reminder
Indicator
●Comes on and the beeper sounds
if you are not wearing a seat belt
when you turn the ignition switch
to ON
(w*1.●If the front passenger is not
wearing a seat belt, the indicator
comes on a few seconds later.
●Blinks while driving if either you or
the front passenger has not
fastened a seat belt. The beeper
sounds and the indicator blinks at
regular intervals.
●The beeper stops and the indicator goes
off when you and the front passenger
fasten their seat belts.
●Stays on after you or the front
passenger has fastened the seat belt
- A detection error may have occurred in
the sensor. Have your vehicle checked by
a dealer.
2 Seat Belt Reminder P. 40
Low Fuel
Indicator
●Comes on when the fuel reserve is
running low (approximately 1.8
U.S. gal/7.0 Liter left).
●Blinks if there is a problem with
the fuel gauge.
●Comes on - Refuel your vehicle as soon
as possible.
●Blinks - Have your vehicle checked by a
dealer.
Anti-lock Brake
System ( ABS)
Indicator
●Comes on for a few seconds when
you turn the ignition switch to ON
(w*1, then goes off.●If it comes on at any other time,
there is a problem with the ABS.
●Stays on constantly - Have your vehicle
checked by a dealer. With this indicator
on, your vehicle still has normal braking
ability but no anti-lock function.
2 Anti-lock Brake System (ABS) P. 499
21 CIVIC 4D HCM_HMIN_J (KA KL KC)-31TBA6500.book 83 ページ ２０２０年８月２５日　火曜日　午後２時６分

90
uuIndicators u
Instrument Panel
IndicatorNameOn/BlinkingExplanationMessage
Road Departure
Mitigation (RDM)
Indicator
●Comes on when the RDM system
shuts itself off.●Stays on - The temperature inside the
camera is too high.
Use the climate control system to cool
down the camera.
The system acti vates when the
temperature inside the camera cools
down.
2 Front Sensor Camera P. 491
●Stays on - The area around the camera is
blocked by dirt, mud, etc. Stop your
vehicle in a safe place, and wipe it off with
a soft cloth.
●Have your vehicle checked by a dealer if
the indicator and message come back on
after you cleaned the area around the
camera.
2 Front Sensor Camera P. 491
●Comes on if there is a problem
with the RDM system.
●Indicator may come on
temporarily when the Maximum
Load Limit is exceeded.
●Make sure the total load is within the
Maximum Load Limit.
2Maximum Load Limit P. 419●Stays on constantly - Have your vehicle
checked by a dealer.
—
21 CIVIC 4D HCM_HMIN_J (KA KL KC)-31TBA6500.book 90 ページ ２０２０年８月２５日　火曜日　午後２時６分

94
uuIndicators u
Instrument Panel
IndicatorNameOn/BlinkingExplanationMessage
Collision
Mitigation
Braking
System
TM
(CMBSTM)
Indicator
• Comes on when the CMBSTM
shuts itself off.• Stays on - The area around the camera is
blocked by dirt, mud, etc. Stop your
vehicle in a safe place, and wipe it off with
a soft cloth.
2 Front Sensor Camera P. 491
•When the radar sensor gets dirty, stop
your vehicle in a safe place, and wipe off
dirt using a soft cloth. Indicator may take
some time to go off after the radar sensor
is cleaned.
• Have your vehicle checked by a dealer if
the indicator does not go off even after
you clean the sensor cover.
2 Collision Mitigation Braking
SystemTM (CMBSTM) P. 453
2 Radar Sensor P. 493
•Stays on - The temperature inside the
camera is too high. Use the climate control
system to cool down the camera. The
system activates when the temperature
inside the camera cools down.
2 Front Sensor Camera P. 491
●Comes on if there is a problem
with the CMBSTM.●Indicator may come on
temporarily when the Maximum
Load Limit is exceeded.
●Make sure the total load is within the
Maximum Load Limit.
2Maximum Load Limit P. 419●Stays on constantly - Have your vehicle
checked by a dealer.
—
21 CIVIC 4D HCM_HMIN_J (KA KL KC)-31TBA6500.book 94 ページ ２０２０年８月２５日　火曜日　午後２時６分