2018 MAZDA MODEL 3 HATCHBACK heating

Overheating
If the high engine coolant temperature
warning light turns on, the vehicle loses
power, or you hear a loud knocking or
pinging noise, the engine is probably too
hot.
WA R N I N G
Pull over to a safe location, then switch
the ignition off and make sure the fan is not
running before attempting to work near
the cooling fan:
Working near the cooling fan when it is
running is dangerous. The fan could
continue running indefinitely even if the
engine has stopped and the engine
compartment temperature is high. You
could be hit by the fan and seriously
injured.
Do not remove either cooling
system cap when the engine and radiator
are hot:
When the engine and radiator are hot,
scalding coolant and steam may shoot out
under pressure and cause serious injury.
Open the hood ONLY after steam is no
longer escaping from the engine:
Steam from an overheated engine is
dangerous. The escaping steam could
seriously burn you.
If the high engine coolant temperature
warning light turns on:

1. Drive safely to the side of the road and
park off the right-of-way.
2. Put a vehicle with an automatic transaxle in park (P), a manual
transaxle in neutral.
3. Apply the parking brake.
4. Turn off the air conditioner.
5. Check whether coolant or steam is
escaping from the engine
compartment.

If steam is coming from the engine
compartment:
Do not go near the front of the vehicle.
Stop the engine.
Wait until the steam dissipates, then
open the hood and start the engine.

If neither coolant nor steam is
escaping:
Open the hood and idle the engine
until it cools.
CAUTION
If the cooling fan does not operate
while the engine is running, the engine
temperature will increase. Stop the
engine and call an Authorized Mazda
Dealer.
6. Make sure the cooling fan is operating, then turn off the engine after the
temperature has decreased.
7. When cool, check the coolant level. If it is low, look for coolant leaks from
the radiator and hoses.

If Trouble Arises
Overheating
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If you find a leak or other damage, or if
coolant is still leaking:
Stop the engine and call an Authorized
Mazda Dealer.
Cooling system cap
Coolant reservoir
Cooling fan
If you find no problems, the engine is
cool, and no leaks are obvious:
Carefully add coolant as required (page
6-25).
CAUTION
If the engine continues to overheat or
frequently overheats, have the cooling
system inspected. The engine could be
seriously damaged unless repairs are
made. Consult an Authorized Mazda
Dealer.
If Trouble Arises
Overheating
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SignalWarning
Charging System Warn-
ing Light If the warning light illuminates
while driving, it indicates a malfunction of the alter-
nator or of the charging system.
Drive to the side of the road and park off the right-of-way. Co nsult an Authorized
Mazda Dealer.CAUTION
Do not continue driving when the charging system warning light is illuminated be‐
cause the engine could stop unexpectedly.
Engine Oil Warning Light This warning light indicates
low engine oil pressure.
CAUTION
Do not run the engine if the oil pressure is low. Otherwise, it could result in extensive
engine damage.
If the light illuminates or the warning indication is displayed while driving:
1. Drive to the side of the road and park off the right-of-way o n level ground.
2. Turn off the engine and wait 5 minutes for the oil to drain back into the oil pan.
3. Inspect the engine oil level (page 6-24). If it's low, add th e appropriate amount of
engine oil while being careful not to overfill.
CAUTION
Do not run the engine if the oil level is low. Otherwise, it could result in extensive
engine damage.
4. Start the engine and check the warning light.

If the light remains illuminated even though the oil level is normal or after adding oil,
stop the engine immediately and have your vehicle towed to an Authorized Mazda
Dealer.
(Red)
High Engine Coolant
Temperature Warning Light The light flashes when the engine coolant temperature is extrem
ely high, and illumi-
nates when the engine coolant temperature increases further.
Handling Procedure
Flashing light
Drive slowly to reduce engine l oad until you can find a safe place to stop the vehicle
and wait for the engine to cool down.
Illuminated light
This indicates the possibility of overheating. Park the vehicle in a safe place immedi-
ately and stop the engine.
Refer to Overheating on page 7-20.
CAUTION
Do not drive the vehicle with the high engi ne coolant temperature warning light illumi‐
nated. Otherwise, it could result in damage to the engine.
If Trouble Arises
Warning/Indicator Lights and Warning Sounds
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Index
When liftgate/trunk lid cannot be
opened..........................................7-43
Lighting Control................................4-43
Lights-on reminder............................7-38
Light Bulbs Replacement................................ 6-42
Specifications.................................9-9
Lubricant Quality................................ 9-4
Luggage Compartment.. ..................5-138
Luggage Compartment Light.......... 5-130
M
Maintenance
Information.................................... 6-2
Scheduled.......................................6-4
Maintenance Monitor........................ 6-16
Manual Transaxle Operation............. 4-29
Map Lights...................................... 5-130
Mazda Radar Cruise Control
(MRCC)...........................................4-102 Close proximity warning........... 4-104
Cruise control function.............. 4-110
Display indication......................4-104
Setting the system..................... 4-104
Shift-up/shift-down request
display........................................ 4-110
Mazda Radar Cruise Control (MRCC)
System warnings............................... 7-41
Meters and Gauges............................4-12
Mirrors Outside mirrors............................ 3-32
Rearview mirror.......................... 3-33
Mirror Defogger.......... ...................... 4-54
Moonroof...........................................3-38
O
Odometer and Trip Meter................. 4-13
Outside Mirrors................................. 3-32
Outside Temperature Display............4-17
Overhead Console........................... 5-136
Overhead Lights......... ..................... 5-130
Overheating....................................... 7-20
Overloading....................................... 3-50
Over Rev. buzzer...............................7-41
Owner Maintenance Closing the Hood.........................6-21
Engine Compartment
Overview..................................... 6-22
Key battery replacement..............6-35
Opening the Hood....................... 6-20
Owner Maintenance
Precautions...................................6-18
P
Parking Brake....................................4-61
Personalization Features................... 9-12
Power Steering.................................. 4-76
Power steering warning buzzer......... 7-41
Power Windows................................ 3-35
R
Radar Sensors (Rear)...................... 4-139
Radar Sensor (Front).......................4-136
Rearview Mirror................................3-33
Rear Coat Hooks......... .................... 5-138
Rear Cross Traffic Alert (RCTA)...... 4-98
Rear Door Child Safet y Locks.......... 3-19
Rear Seat............................................. 2-7
Rear View Monitor......................... 4-150
Displayable range on the
screen......................................... 4-152
Picture quality adjustment......... 4-158
Rear view monitor operation..... 4-154
Rear view parking camera
location...................................... 4-151
Switching to the rear view monitor
display........................................4-151
Variance between actual road
conditions and displayed
Image......................................... 4-156
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Index
Theft-Deterrent System..................... 3-43
TiedownHook.............. .............................. 7-23
Tires................................................... 6-38
Flat Tire......................................... 7-3
Replacing a Tire.......................... 6-40
Replacing a Wheel...................... 6-41
Snow tires.................................... 3-48
Specifications...............................9-10
Temporary Spare Tire..................6-40
Tire chains................................... 3-49
Tire Inflation Pressure................. 6-38
Tire Rotation................................6-39
Uniform tire quality grading system
(UTQGS)..................................... 8-23
Tire inflation pressure warning
beep................................................... 7-40
Tire Information................................ 8-25
Tire Pressure Monitoring System.... 4-146
To w i n g
Recreational towing.....................3-52
Trailer Towing............................. 3-52
Towing Description........................... 7-22
Traction Control System (TCS)........ 4-67 TCS/DSC Indicator Light............4-67
Traffic Sign Recognition System
(TSR)................................................. 4-90
Transmitter.......................................... 3-4
Trip Computer................................... 4-18
Trip Meter......................................... 4-13
Trouble Battery runs out........................... 7-16
Emergency Starting..................... 7-19
Emergency Towing......................7-22
Flat Tire......................................... 7-3
Overheating................................. 7-20
Parking in an Emergency.............. 7-2
When liftgate/trunk lid cannot be
opened..........................................7-43
Trunk Lid.......................................... 3-20
Inside trunk release lever............ 3-24When liftgate/trunk lid cannot be
opened..........................................7-43
V
Vanity Mirrors................................. 5-129
Vehicle Information Labels................. 9-2
W
Warning Lights.................................. 4-24
Warning Message Indicated on
Display.............................................. 7-36
Warning Sound is Activated............. 7-38
Advanced Key removed from vehicle
warning beep............................... 7-39
Air Bag/Front Seat Belt Pretensioner
System Warning Beep................. 7-38
Blind Spot Monitoring (BSM)
warning beep............................... 7-41
Collision warning...... .................. 7-41
Electric Parking Brake (EPB)
Warning Beep.............................. 7-42
Excessive speed warning.............7-41
Ignition not switched off (STOP)
warning beep............................... 7-39
i-ELOOP warning beep............... 7-40
Key left-in-luggage compartment
warning beep (With the advanced
keyless function)..........................7-40
Key left-in-vehicle warning beep
(With the advanced keyless
function).......................................7-40
Key removed from vehicle warning
beep..............................................7-39
Lane Departure Warning sound... 7-40
Lights-on reminder...................... 7-38
Mazda Radar Cruise Control
(MRCC) System warnings.......... 7-41
Over Rev. buzzer......................... 7-41
Power steering warning buzzer....7-41
Seat belt warning beep................ 7-38
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