2021 HONDA CIVIC SEDAN cooling

uuClimate Control System uUsing Automatic Climate Control
194
Controls
Use the system when the engine is running.
1. Press the AUTO button.
2. Adjust the interior temperature us ing the temperature control dial.
3. Press the (on/off) button to cancel.
1Using Automatic Climate Control
Pressing the button switches the climate control
system between on and off. When turned on, the
system returns to your last selection.
While ECON mode is active, the climate control
system may have reduced cooling performance.
Press the / (CLIMATE) button
to display A/C, MODE , fan control information on
the audio/information scr een to operate manually.
Select icon to turn on or off A/C, change the vent
mode, or change the fan speed.
Models with Display Audio
Models with Display Audio
Models without SYNC button
AUTO Button
Temperature
Control Dial A/C
(Air Conditioning) Icon
(Recirculation) Button (On/Off) Button
Fan Control
Dial
(Fresh Air) Button
Fan Control Icon MODE Control
Icon
(Dashboard vents)
(Floor vents) MODE Control
Icon MODE
Control Icon
MODE Control Icon
(Floor and
defroster vents)
(Dashboard and
floor vents)
(CLIMATE)
Button
(Windshield Defroster) Button
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531
uuMaintenance Under the Hood uEngine Coolant
Continued
Maintenance
Engine Coolant
This coolant is premixed with 50% an tifreeze and 50% water. Do not add any
straight antifreeze or water.
We recommend you check the engine coolant level every time you refuel. Check the
reserve tank. Add the engine coolant accordingly.
1. Make sure the engine and radiator are cool .
2. Check the amount of coolant in the reserve
tank.
u If the coolant level is below the MIN
mark, add the specified coolant until it
reaches the MAX mark.
3. Inspect the cooling system for leaks.
Specified coolant: Ho nda Long Life Antifreeze/Coolant Type 2
■Checking the Coolant
1Engine Coolant
NOTICE
Genuine Honda engine coolan t is a 50/50 mixture of
antifreeze and water that can withstand freezing at
temperatures as low as about −31°F (−35°C). If your
vehicle is consistently subjected to temperatures
below this, the concentration of antifreeze in the
coolant should be increased. Consult a dealer for
details.
If Honda antifreeze /coolant is not available, you may
use another major brand of non-silicate coolant as a
temporary replacement. Check that it is a high quality
coolant recommended for aluminum engines.
Continued use of any non-Honda coolant can result
in corrosion, causing the cooling system to
malfunction or fail. Have the cooling system flushed
and refilled with Honda anti freeze/coolant as soon as
possible.
3WARNING
Removing the reserve tank cap while the
engine is hot can cause the coolant to spray
out, seriously scalding you.
Always let the engine and radiator cool
down before removing the reserve tank
cap.
MAX
MINReserve Tank
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uuMaintenance Under the Hood uEngine Coolant
532
Maintenance
1. Make sure the engine and radiator are
cool.
2. Turn the reserve tank cap 1/8 turn counter-
clockwise and relieve any pressure in the
cooling system.
3. Push down and turn the reserve tank cap
counter-clockwise to remove it.
4. Pour coolant into the reserve tank until it
reaches the MAX mark.
5. Put the reserve tank cap back on, and
tighten it fully.
■Adding the Coolant1Engine Coolant
Do not add rust inhibitors or other additives to your
vehicle’s cooling system. Th ey may not be compatible
with the coolant or with the engine components.
1 Adding the Coolant
NOTICE
Pour the fluid slowly and ca refully so you do not spill
any. Clean up any spills immediately; they can
damage components in the engine compartment.
Reserve Tank
Cap
1.5 L engine models
Reserve Tank
Cap
2.0 L engine models
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562
Maintenance
Climate Control System Maintenance
Air Conditioning
To ensure proper and safe operation, th e Society of Automotive Engineers (SAE
J2845) recommends that the refrigerant sy stem only be serviced by trained and
certified technicians.
Never repair or replace the air conditioning evaporator (cooling coil) with one
removed from a used or salvaged vehicle.
New replacement mobile air conditioning evaporators must be certified (and
labeled) as meeting SAE Standard J2842.
Dust and Pollen Filter
The climate control system is equipped wi th a dust and pollen filter that collects
pollen, dust, and other debris in the air. The Maintenance MinderTM messages will let
you know when to replace the filter.
We recommend that you replace the dust and pollen filter sooner when using your
vehicle in areas with high concentrations of dust.
1Air Conditioning
NOTICE
Vented refrigerant is harmful to the environment.
To avoid refrigerant from venting, never replace the
evaporator with one re moved from a used or
salvaged vehicle.
Refrigerant in your vehicle’ s air conditioning system is
flammable and can be igni ted during servicing if
proper procedures are not followed.
The air conditioner labe l is found under the hood:
2 Safety Labels P. 76
2 Specifications P. 604, 606
Canadian models
Flammable Refrigerant
Requires Registered
Technician to Service
Air Conditioning
System
: Caution
:
:
:
1
Dust and Pollen Filter
If the airflow from the climate control system
deteriorates noticeably, and the windows fog up
easily, the filter may need to be replaced. Please
contact a dealer for replacement.
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uuOverheating uHow to Handle Overheating
588
Handling the Unexpected
■Next thing to do
1.Check that the cooling fan is operating and
stop the engine once the temperature
gauge pointer comes down.
u If the cooling fan is not operating,
immediately stop the engine.
2. Once the engine has cooled down, inspect
the coolant level an d check the cooling
system components for leaks.
u If the coolant level in the reserve tank is
low, or no coolant in the tank, check that
the radiator is cool. Cover the reserve
tank cap with a hea vy cloth and open the
cap. Add coolant until it reaches the
MAX mark, and put the cap back on.
■Last thing to do
Once the engine has cooled sufficiently, restart it and check the temperature gauge.
If the temperature gauge pointer has gone do wn, resume driving. If it has not gone
down, contact a dealer for repairs.
1 How to Handle Overheating
If the coolant is leaking, contact a dealer for repairs.
Use water as an emergency/temporary measure only.
Have a dealer flush the system with proper antifreeze
as soon as possible.
3WARNING
Removing the reserve tank cap while the
engine is hot can cause the coolant to spray
out, seriously scalding you.
Always let the engine and radiator cool
down before removing the reserve tank
cap.
MAX
Reserve TankMIN
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595Continued
Handling the Unexpected
Fuses
Fuse Locations
If any electrical devices are not working,
turn the ignition switch to LOCK
(0*1 and
check to see if any appl icable fuse is blown.
Located near the battery. Push the tabs to
open the box.
Fuse locations are shown on the fuse box
cover. Locate the fuse in question by the
fuse number and box cover number.
■Engine Compartment Fuse Box
■Circuit protected and fuse rating
Circuit ProtectedAmps
1
Passenger’s Power Seat*/
Rear Seat Heaters*(60 A)
Cooling Fan*2(30 A)
Cooling Fan*3(50 A)
−−
IG Main*430 A
−*5−
Headlight High Beam Main30 A
Battery125 A
2
EPS70 A
IG Main 30 A*4
50 A*5
Fuse Box Option*(40 A)
Fuse Box 60 A
Front Wiper Motor30 A
Headlight Low Beam Main 30 A
3
Rear Defroster40 A
Starter Motor*430 A
−*5−
Fuse Box40 A
ABS/VSA Motor40 A
ABS/VSA FSR40 A
Blower Motor40 A
*1:Models with the smart entry system have an ENGINE START/STOP button
instead of an ignition switch.
*2:2.0L engine models
*3:1.5L engine models
*4:Models with smart entry system
*5:Models without smart entry system 4
−−
−−
−−
−−
5Cooling Fan5A
6Washer 15A
7FI Main15 A
8FI Sub 15A
9Stop Lights10 A
10 Injector*3(15 A)
11LAF5A
12 FI ECU 10 A
13Parking Lights10 A
14 Hazard 15 A
15IG Coil15 A
16 Transmission (15 A)
17Daytime Running Lights10 A
Circuit ProtectedAmps
* Not available on all models
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