2023 HONDA CIVIC coolant temperature

702
uuMaintenance MinderTMuTo Use Maintenance MinderTM
Maintenance
1Maintenance Service Items
•Adjust the valves during services A, 0, 9, 1, 2, or 3
if they are noisy.
Canadian models with Auto Idle Stop
*1: If a Maintenance Minder message does not appear more than 12 months after the display is reset,
change the engine oil every year.
*2: If you drive in dusty conditions, replace the air cleaner element every 24,000 km (15,000 miles).
*3: If you drive primarily in urban areas that have high concentrations of soot in the air from industry and from diesel-powered vehicles, replace the dust and pollen filter every 24,000 km (15,000 miles).
*4: Driving in mountainous areas at very low vehicle speeds results in higher transmission temperatures. This requires transmission fluid changes more frequently than recommended by the Maintenance
Minder
TM.
If you regularly drive your vehicle under these conditions, have the transmission fluid changed every
40,000 km (25,000 miles).
If you regularly drive your vehicle under these conditions, have the transmission fluid changed every
60,000 km (37,500 miles).
*5: If a Maintenance Minder message does not appear more than 36 months after the display for item 7 is reset, change the brake fluid every 3 years.
# : See information on maintenance and emissions warranty in the first column on page 825.
CODEMaintenance Main Items
A
●Replace engine oil*1
0●Replace engine oil*1 and oil filter
Continuously variable transmission models
Manual transmission models
CODEMaintenance Sub Items
1
●Rotate tires
2●Replace air cleaner element*2
●Replace dust and pollen filter*3
●Inspect drive belt
3
●Replace transmission fluid*4
4●Replace spark plugs●Inspect valve clearance
5
●Replace engine coolant
7●Replace brake fluid*5
9●Service front and rear brakes●Inspect these items: • Tie rod ends, steering gearbox, and boots
• Suspension components
• Driveshaft boots
• Brake hoses and lines (including ABS/VSA ®)
• All fluid levels and condition of fluids
• Exhaust system
#
•Fuel lines and connections#
23 CIVIC HATCHBACK TYPE R-31T406100_03.book 702 ページ ２０２２年６月２３日　木曜日　午後９時２８分

703
uuMaintenance MinderTMuTo Use Maintenance MinderTM
Continued
Maintenance
1Maintenance Service Items
•Adjust the valves during services A, B, 1, 2, or 3 if
they are noisy.
U.S. models without Auto Idle Stop
*1: If a Maintenance Minder message does not appear more than 12 months after the display is reset,
change the engine oil every year.
# : See information on maintenance and emissions warranty in the first column on page 823.
CODEMaintenance Main Items
A
●Replace engine oil*1
B●Replace engine oil*1 and oil filter●Inspect front and rear brakes●Check expiry date for tire repair kit bottle●Inspect these items: • Tie rod ends, steering gearbox, and boots
• Suspension components
• Driveshaft boots
• Brake hoses and lines (including ABS/VSA®)
• All fluid levels and condition of fluids
• Exhaust system
#
•Fuel lines and connections#*2: If you drive in dusty conditions, replace the air cleaner element every 15,000 miles (24,000 km).
*3: If you drive primarily in urban areas that have high concentrations of soot in the air from industry and
from diesel-powered vehicles, replace the dust and pollen filter every 15,000 miles (24,000 km).
*4: Driving in mountainous areas at very low vehicle speeds results in higher transmission temperatures. This requires transmission fluid changes more frequently than recommended by the Maintenance
Minder
TM.
If you regularly drive your vehicle under these conditions, have the transmission fluid changed every
37,500 miles (60,000 km).
*5: If a Maintenance Minder message does not appear more than 36 months after the display for item 7 is reset, change the brake fluid every 3 years.
CODEMaintenance Sub Items
1
●Rotate tires
2●Replace air cleaner element*2
●Replace dust and pollen filter*3
●Inspect drive belt
3
●Replace transmission fluid*4
4●Replace spark plugs●Inspect valve clearance
5
●Replace engine coolant
7●Replace brake fluid*5
23 CIVIC HATCHBACK TYPE R-31T406100_03.book 703 ページ ２０２２年６月２３日　木曜日　午後９時２８分

704
uuMaintenance MinderTMuTo Use Maintenance MinderTM
Maintenance
1Maintenance Service Items
•Adjust the valves during services A, 0, 9, 1, 2, or 3
if they are noisy.
Canadian models without Auto Idle Stop
*1: If a Maintenance Minder message does not appear more than 12 months after the display is reset,
change the engine oil every year.
*2: If you drive in dusty conditions, replace the air cleaner element every 24,000 km (15,000 miles).
*3: If you drive primarily in urban areas that have high concentrations of soot in the air from industry and from diesel-powered vehicles, replace the dust and pollen filter every 24,000 km (15,000 miles).
*4: Driving in mountainous areas at very low vehicle speeds results in higher transmission temperatures. This requires transmission fluid changes more frequently than recommended by the Maintenance
Minder
TM.
If you regularly drive your vehicle under these conditions, have the transmission fluid changed every
60,000 km (37,500 miles).
*5: If a Maintenance Minder message does not appear more than 36 months after the display for item 7 is reset, change the brake fluid every 3 years.
# : See information on maintenance and emissions warranty in the first column on page 825.
CODEMaintenance Main Items
A
●Replace engine oil*1
0●Replace engine oil*1 and oil filter
CODEMaintenance Sub Items
1
●Rotate tires
2●Replace air cleaner element*2
●Replace dust and pollen filter*3
●Inspect drive belt
3
●Replace transmission fluid*4
4●Replace spark plugs●Inspect valve clearance
5
●Replace engine coolant
7●Replace brake fluid*5
9●Service front and rear brakes●Check expiry date for tire repair kit bottle●Inspect these items: • Tie rod ends, steering gearbox, and boots
• Suspension components
• Driveshaft boots
• Brake hoses and lines (including ABS/VSA ®)
• All fluid levels and condition of fluids
• Exhaust system
#
•Fuel lines and connections#
23 CIVIC HATCHBACK TYPE R-31T406100_03.book 704 ページ ２０２２年６月２３日　木曜日　午後９時２８分

721
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 first. If it is completely empty, also check the coolant level in the
radiator. 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
■Reserve Tank
Models with Auto Idle Stop
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 radiator 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 radiator cap.
MAX
MIN
Reserve Tank
23 CIVIC HATCHBACK TYPE R-31T406100_03.book 721 ページ ２０２２年６月２３日　木曜日　午後９時２８分

723
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
Models without Auto Idle Stop
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.
Reserve Tank
23 CIVIC HATCHBACK TYPE R-31T406100_03.book 723 ページ ２０２２年６月２３日　木曜日　午後９時２８分

uuOverheating uHow to Handle Overheating
792
Handling the Unexpected
■Next thing to do
1.Check that the cooling fan is operating and
stop the engine once the Engine
temperature too hot. Do not drive.
Allow engine to cool. message on the
driver information interface disappears.
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, add coolant until it reaches the
MAX mark.
u If there is no coolan t in the reserve tank,
check that the radiator is cool. Cover the
radiator cap with a heavy cloth and open
the cap. If necessary, add coolant up to
the base of the filler neck, and put the
cap back on.
■Last thing to do
Once the engine has cooled sufficiently, re start it and check the driver information
interface.
If the Engine temperature too hot. Do not drive. Allow engine to cool.
message does not appear, resume driving. If it appears again, 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 radiator 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 radiator cap.
MAX
Reserve Tank
MIN
23 CIVIC HATCHBACK TYPE R-31T406100_03.book 792 ページ ２０２２年６月２３日　木曜日　午後９時２８分

uuOverheating uHow to Handle Overheating
794
Handling the Unexpected
■Next thing to do
1.Check that the cooling fan is operating and
stop the engine once the temperature
gauge goes 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, add coolant until it reaches the
MAX mark.
u If there is no coolan t in the reserve tank,
check that the radiator is cool. Cover the
reserve tank cap with a heavy cloth and
open the cap. If necessary, add coolant
up to the base of the filler neck, 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 has gone down, re sume 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 Tank
MIN
23 CIVIC HATCHBACK TYPE R-31T406100_03.book 794 ページ ２０２２年６月２３日　木曜日　午後９時２８分

831
Index
Continuously Variable TransmissionCreeping................................................. 502
Fluid ....................................................... 725
Kickdown ............................................... 502
Operating the Shift Lever .......... 29, 504, 506
Shift Lever Does Not Move ...................... 790
Shifting ........................................... 503, 505
Controls .................................................... 173
Coolant (Engine) .............................. 721, 723
Adding the Coolant ........................ 721, 724
Overheating ............................................ 791
Creeping (Continuously Variable Transmission) .......................................... 502
Cross Traffic Monitor ............................... 677
Cup Holders .............................................. 235
Customer Service Information ................ 827
Customize Display .................... 136, 151, 170
Customized Features ....................... 382, 390
D
Daytime Running Lights .......................... 209
Dead Battery ............................................ 786
Defaulting All the Settings .............. 389, 413
Defrosting the Windshield and Windows ................................................. 251
Devices that Emit Radio Waves ............... 818
Dimming Headlights .............................................. 206
Rearview Mirror ...................................... 220
Dipstick (Engine Oil) ................................ 713 Directional Signals (Turn Signal)
............. 205
Display Setup .................................... 266, 308
Door Mirrors ............................................. 221
Doors ......................................................... 176
Auto Door Locking .................................. 191
Auto Door Unlocking ............................... 191
Door Open Message .................................. 47
Keys ........................................................ 176
Locking/Unlocking the Doors from the Inside..................................................... 188
Locking/Unlocking the Doors from the
Outside.................................................. 179
DOT Tire Quality Grading ........................ 739
Drive Mode Switch ........................... 525, 529
Driver Attention Monitor ................ 131, 161
Driver Information Interface ... 125, 148, 154
Switching the Display ...................... 125, 155
Driver's Knee Airbag .................................. 65
Driving ....................................................... 485
Braking .................................................... 657
Continuously Variable Transmission ......... 502
Shifting Gear ........................................... 509
Shifting Position .............................. 503, 505
Starting the Engine .................................. 493
Dust and Pollen Filter ............................... 750
E
Eco Assist® System ...................................... 15
ECON Button ............................................. 513
Elapsed Time ..................................... 130, 160 Electric Power Steering (EPS) System
Indicator.......................................... 104, 798
Electronic Stability Control (ESC) ............. 535
Emergency ................................................ 808
Emergency Engine Stop ........................... 785
Emergency Hatch Opener ........................ 810
Emissions Testing (Readiness Codes) ....... 820
Engine
Coolant ........................................... 721, 723
If the Battery Is Dead ............................... 786
Oil ........................................................... 711
Starting ................................................... 493
Engine Coolant ................................. 721, 723
Adding the Coolant......................... 721, 724
Overheating ............................................ 791
Temperature Gauge ................................ 119
Engine Oil ................................................. 711
Adding .................................................... 716
Checking................................................. 713
Displaying Oil Life .................................... 696
Engine oil pressure low Warning ............. 795
Recommended Engine Oil ....................... 711
Engine oil pressure low Warning ............ 795
ENGINE START/STOP Button .................... 202
Exhaust Gas Hazard (Carbon Monoxide) .. 92
Exterior Care (Cleaning) ........................... 753
Exterior Mirrors ........................................ 221
23 CIVIC HATCHBACK TYPE R-31T406100_03.book 831 ページ ２０２２年６月２３日　木曜日　午後９時２８分