2015 MAZDA MODEL 3 HATCHBACK engine

6–28
Maintenance and Care
Owner Maintenance
Vehicle Engine Control Unit Reset Procedure
NOTE
This procedure is intended for vehicles with SKYACTIV-D 2.2 and vehicles with
SKYACTIV-G 1.5 or SKYACTIV-G 2.0 which the engine oil fl exible maintenance setting
is selected.
After replacing the engine oil, have a repair shop such as an Authorised Mazda Repairer
perform the initialization (engine oil data resetting) of the recorded value. If the value
recorded by the computer is not initialized, the wrench indicator light may not turn off or it
may turn on earlier than normal.
NOTE
The initialization (engine oil data resetting) of the recorded value can be performed using
the following procedure:
1. Switch the ignition OFF.
2. Switch the ignition ON with the selector pressed, and press and hold the selector for
about 5 seconds until the master warning light
fl ashes. 
Selector
3. After the master warning light fl ashes for several seconds, the initialization is
completed.
.B[EB@&'&&"@&EJUJPOJOEC







6–29
Maintenance and Care
Owner Maintenance
Inspecting Engine Oil Level
1. Be sure the vehicle is on a level
surface.
2. Warm up the engine to normal
operating temperature.
3. Turn it off and wait at least 5 minutes
for the oil to return to the sump.
4. Pull out the dipstick, wipe it clean, and
reinsert it fully.
MZR 1.6
OKFull
Low
SKYACTIV-G 1.5 and
SKYACTIV-G 2.0
Full
OK
Low
SKYACTIV-D 2.2
Low OK Full
NOTE
(SKYACTIV-D 2.2)
When inspecting the engine oil level,
pull out the dipstick straight without
twisting. In addition, when inserting
the dipstick, always insert it without
twisting so that the “X” mark faces the
front of the vehicle.
5. Pull it out again and examine the level.
The level is normal if it is between
Low and Full.
If it is near or below Low, add enough
oil to bring the level to Full.
CAUTION
Do not overfi ll the engine oil. This may
cause engine damage.
6. Make sure the O-ring on the dipstick is
positioned properly before reinserting
the dipstick.
7. Reinsert the dipstick fully.
.B[EB@&'&&"@&EJUJPOJOEC







6–30
Maintenance and Care
Owner Maintenance
Engine Coolant
Inspecting Coolant Level
WARNING
Do not use a match or live fl ame in the
engine compartment. DO NOT ADD
COOLANT WHEN THE ENGINE IS
HOT:
A hot engine is dangerous. If the
engine has been running, parts of the
engine compartment can become very
hot. You could be burned. Carefully
inspect the engine coolant in the
coolant reservoir, but do not open it.
Switch the ignition to 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 indefi nitely 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.
NOTE
Changing the coolant should be done
by an expert repairer, we recommend an
Authorised Mazda Repairer.
Inspect the antifreeze protection and
coolant level in the coolant reservoir at
least once a year—at the beginning of
the winter season—and before travelling
where temperatures may drop below
freezing.
Inspect the condition and connections of
all cooling system and heater hoses.
Replace any that are swollen or
deteriorated.
The coolant should be at full in the
radiator and between the F and L marks
on the coolant reservoir when the engine
is cool.
MZR 1.6, SKYACTIV-G 1.5 and
SKYACTIV-G 2.0
.B[EB@&'&&"@&EJUJPOJOEC







6–31
Maintenance and Care
Owner Maintenance
SKYACTIV-D 2.2
If it is at or near L, add enough coolant to
the coolant reservoir to provide freezing
and corrosion protection and to bring the
level to F.
Securely tighten the coolant reservoir tank
cap after adding coolant.
CAUTION
  Radiator coolant will damage paint.  Rinse it off quickly if spilled.


 Use only soft (demineralised) water
in the coolant mixture. Water that
contains minerals will cut down on
the coolant's effectiveness.
  Do not add only water. Always add a
proper coolant mixture.
  The engine has aluminium parts and
must be protected by an ethylene-
glycol-based coolant to prevent
corrosion and freezing.
  DO NOT USE coolants Containing
Alcohol, methanol, Borate or
Silicate.
 These coolants could damage the
cooling system.
CAUTION
  DO NOT MIX alcohol or methanol
with the coolant. This could damage
the cooling system.
  Do not use a solution that contains
more than 60% antifreeze.
 This would reduce effectiveness.
 
 If the “FL22” mark is shown on or
near the cooling system cap, use
of FL-22 is recommended when
replacing engine coolant. Using
engine coolant other than FL-22 may
cause serious damage to the engine
and cooling system.
If the coolant reservoir is empty or new
coolant is required frequently, consult
an expert repairer, we recommend an
Authorised Mazda Repairer.
.B[EB@&'&&"@&EJUJPOJOEC







6–33
Maintenance and Care
Owner Maintenance
Automatic Transaxle
Fluid (4-speed transaxle)
Inspecting Automatic Transaxle
Fluid Level
The automatic transaxle fl uid level should
be inspected regularly. Measure it as
described below.
The volume of fl uid changes with
temperature. Fluid must be checked while
idling the engine without driving at normal
operating temperature.
1. Park on a level surface and set the
parking brake fi rmly.
2. Start the engine and depress the brake
pedal.
3. Move the shift lever through all ranges
and set it at P.
WARNING
Make sure the brake pedal is applied
before shifting the shift lever:
Shifting the shift lever without
fi rst depressing the brake pedal is
dangerous. The vehicle could move
suddenly and cause an accident.
4. With the engine still idling, pull out the
dipstick, wipe it clean, and put it back.
5. Pull it out again.
The proper fl uid level is marked on the
dipstick as follows.
A
B Full
Full
Low
Low
Fluid hot scale A
When the vehicle has been driven and the
fl uid is at normal operating temperature,
about 65°C (150°F), the level must be
between Full and Low.
Fluid cold scale B
When the engine has not been running
and the outside temperature is about 20°C
(70°F), the level must be between Full and
Low.
.B[EB@&'&&"@&EJUJPOJOEC







6–34
Maintenance and Care
Owner Maintenance
CAUTION
  Use the cold scale only as a
reference.
  If outside temperature is lower
than about 20°C (70°F), start the
engine and inspect the fl uid level
after the engine reaches operating
temperature.
  If the vehicle has been driven for an
extended period at high speeds or in
city traffi c in hot weather, inspect the
level only after stopping the engine
and allowing the fl uid to cool for 30
minutes.
If the ATF level does not reach the
appropriate level, consult an expert
repairer, we recommend an Authorised
Mazda Repairer to have the vehicle
inspected.
NOTE
Inspect the fl uid on both sides of the
dipstick in a well lit area for an accurate
reading.
Window and Headlight
Washer Fluid
Inspecting Washer Fluid Level
WARNING
Use only windscreen washer fl uid or
plain water in the reservoir:
Using radiator antifreeze as washer
fl uid is dangerous. If sprayed on the
windscreen, it will dirty the windscreen,
affect your visibility, and could result in
an accident.
Inspect fl uid level in the washer fl uid
reservoir; add fl uid if necessary.
Type A
L
.B[EB@&'&&"@&EJUJPOJOEC







6–35
Maintenance and Care
Owner Maintenance
Type B
OK
F
E

Use plain water if washer fl uid is
unavailable.
But use only washer fl uid in cold weather
to prevent it from freezing.
NOTE
Front and rear washer fl uid is supplied
from the same reservoir.
Body Lubrication
All moving points of the body, such as
door and bonnet hinges and locks, should
be lubricated each time the engine oil is
changed. Use a nonfreezing lubricant on
locks during cold weather.
Make sure the bonnet's secondary latch
keeps the bonnet from opening when the
primary latch is released.
.B[EB@&'&&"@&EJUJPOJOEC







*Some models.6–42
Maintenance and Care
Owner Maintenance
Battery Maintenance
To get the best service from a battery:




 Keep it securely mounted.



 Keep the top clean and dry.



 Keep terminals and connections clean,
tight, and coated with petroleum jelly or
terminal grease.
 


 Rinse off spilled electrolyte immediately
with a solution of water and baking
soda.
 


 If the vehicle will not be used for an
extended time, disconnect the battery
leads and charge the battery every six
weeks.
Inspecting Electrolyte Level *
A low level of electrolyte fl uid will cause
the battery to discharge quickly.
Upper level
Lower level
Inspect the electrolyte level at least once
a week. If it is low, remove the caps and
add enough distilled water to bring the
level between the upper and lower level
(illustration).
Do not overfi ll.
Examine the specifi c gravity of the
electrolyte with a hydrometer, especially
during cold weather. If it is low, recharge
the battery.
Battery Recharging
NOTE
  Before performing maintenance or
recharging the battery, turn off all
accessories and stop the engine.
  To disconnect the battery, remove the
negative lead fi rst. Install it last when
connecting the battery.
  Be sure to remove the caps before
recharging the battery.
 (With i-stop system) Do not quick-charge the battery.




 If the battery quickly discharges
because, for example, the lights were
left on too long with the engine off,
slow-charge it as required by battery
size and charger capacity.
 


 If the battery gradually discharges
because of high electric load while the
vehicle is being used, recharge it as
required by battery size and charger
capacity.
Battery Replacement
Contact an Authorised Mazda Dealer for a
battery replacement purchase.
.B[EB@&'&&"@&EJUJPOJOEC