ECU MAZDA MODEL 3 4-DOOR 2017 Service Manual

6–29
Maintenance and Care
Owner Maintenance
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 traveling 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.
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 (demineralized) 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 aluminum 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. 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
Authorized Mazda Dealer.
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6–38
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
cables and charge the battery every six
weeks.
Battery Replacement
Contact an Authorized Mazda Dealer for a
battery replacement purchase.
Key Battery Replacement
If the buttons on the transmitter are
inoperable and the operation indicator
light does not flash, the battery may be
dead.
Replace with a new battery before the
transmitter becomes unusable.
CAUTION
 Make sure the battery is installed
correctly. Battery leakage could occur if it
is not installed correctly.
 When replacing the battery, be careful
not to touch any of the internal circuitry
and electrical terminals, bend the
electrical terminals, or get dirt in the
transmitter as the transmitter could be
damaged.
 There is the danger of explosion if the
battery is not correctly replaced. Dispose of used batteries according to
the following instructions.
 Insulate the plus and minus terminals
of the battery using cellophane or
equivalent tape.
 Never disassemble. Never throw the battery into fire or
water. Never deform or crush.
 Replace only with the same type battery
(CR2025 or equivalent).
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6–53
Maintenance and Care
Owner Maintenance
5. Disconnect the bulb by pulling it out.
Rear turn signal lights, Brake lights/
Taillights/Rear side-marker lights
(Bulb type)

6. Install the new bulb in the reverse order
of the removal procedure.
7. Insert the cover tabs and install the
cover.
Tabs
NOTE
Verify that the cover is securely installed.(Right side)
1. Make sure the ignition is switched of
f,
and the headlight switch is off.
2. Turn the knob and remove the cover.

3. Turn the wing bolt and jack screw
counterclockwise.

4. Remove the jack
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6–55
Maintenance and Care
Owner Maintenance
7. Disconnect the bulb by pulling it out.
Rear turn signal lights, Brake lights/
Taillights/Rear side-marker lights
(Bulb type)

8. Install the new bulb.
9. Insert the wing bolt into the jack with
the jack screw pointing to the down
and turn the wing bolt clockwise to
temporarily tighten it.
10. Turn the jack screw in the direction
shown in the figure.

11. Turn the wing bolt completely to secure
the jack.
NOTE
If the jack is not completely secured, it
could rattle while driving. Make sure the
jack screw is sufficiently tightened.
12. Install the cover in the reverse order of
the removal procedure.
13. Insert the cover tabs and install the
cover.
Tabs
NOTE
Verify that the cover is securely installed.
Reverse lights
4–Door
1. Make sure the ignition is switched off,
and the headlight switch is off.
2. Pull the center of each plastic retainer
and remove the retainers.
3. Peel back the trunk lid trim.

Removal
Installation
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6–61
Maintenance and Care
Owner Maintenance
3. Pull the fuse straight out with the
fuse puller provided on the fuse block
located in the engine compartment.
4. Inspect the fuse and replace it if it is
blown.
NormalBlown
5. Insert a new fuse of the same amperage
rating, and make sure it fits tightly. If
it does not fit tightly, have an expert
install it. We recommend an Authorized
Mazda Dealer.
If you have no spare fuses, borrow one
of the same rating from a circuit not
essential to vehicle operation, such as
the AUDIO or OUTLET circuit.
CAUTION
Always replace a fuse with a genuine
Mazda fuse or equivalent of the same
rating. Otherwise you may damage
the electric system.
6. Reinstall the cover and make sure that
it is securely installed.
Replacing the fuses under the hood
If the headlights or other electrical
components do not work and the fuses
in the cabin are normal, inspect the fuse
block under the hood. If a fuse is blown, it
must be replaced. Follow these steps:
1. Make sure the ignition is switched of f,
and other switches are off.
2. Remove the fuse block cover.
3. If any fuse but the MAIN fuse is
blown, replace it with a new one of the
same amperage rating.
Normal Blown
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6–62
Maintenance and Care
Owner Maintenance
WARNING
Do not replace the main fuse and
multiplex slow blow fuse by yourself.
Have an Authorized Mazda Dealer
perform the replacement:Replacing these fuses by yourself is
dangerous because they are high
current fuses. Incorrect replacement
could cause an electrical shock or a
short circuit resulting in a fire.
4. Reinstall the cover and make sure that
it is securely installed.
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6–75
Maintenance and Care
Appearance Care
Panel Maintenance
If a panel becomes soiled, wipe it off with
a soft cloth soaked in clean water and
thoroughly wrung out.
If some areas require further cleaning, use
the following procedure:
1. Wipe the soiled area with a soft cloth
soaked in a mild detergent (approx. 5
%) diluted with water.
2. Wipe off the remaining detergent using
a cloth soaked in clean water and
wrung out well.
NOTE
Be particularly careful when cleaning
shiny surface panels and metallic parts
such as plating as they can be scratched
easily.
Cleaning the Window Interiors
If the windows become covered with an
oily, greasy, or waxy film, clean them with
glass cleaner. Follow the directions on the
container.
CAUTION
 Do not scrape or scratch the inside of
the window glass. It could damage the
thermal filaments and the antenna lines.
 When washing the inside of the window
glass, use a soft cloth dampened in
lukewarm water, gently wiping the
thermal filaments and the antenna lines.
Use of glass cleaning pr oducts could
damage the thermal filaments and the
antenna lines.
Cleaning the Floor Mats
Rubber floor mats should be cleaned with
mild soap and water only.
WARNING
Do not use rubber cleaners, such as tire
cleaner or tire shine, when cleaning
rubber floor mats:
Cleaning the rubber floor mats with
rubber cleaning products makes the
floor mats slippery.
This may cause an accident when
depressing the accelerator, brake, or
clutch (Manual transaxle) pedal or
when getting in or out of the vehicle.
After removing the floor mats for cleaning,
always reinstall them securely (page
3-47).
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7–4
If Trouble Arises
Flat Tire
Jack
To remove the jack
1. (4–Door)
Push the tabs and remove the cover.

Tabs
(5–Door)
Turn the knob and remove the cover.

2. Turn the wing bolt and jack screw
counterclockwise.

To secure the jack
1. Insert the wing bolt into the jack with
the jack screw pointing to the down
and turn the wing bolt clockwise to
temporarily tighten it.
2. Turn the jack screw in the direction
shown in the figure.

3. Turn the wing bolt completely to secure
the jack.
NOTE
If the jack is not completely secured, it
could rattle while driving. Make sure the
jack screw is sufficiently tightened.
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7–5
If Trouble Arises
Flat Tire
4. Insert the cover tabs and install the
cover.
(4-Door)
Tabs
Tabs
(5-Door)
NOTE
Verify that the cover is securely installed.
Maintenance
 Always keep the jack clean. Make sure the moving parts are kept
free from dirt or rust. Make sure the screw thread is
adequately lubricated.
Spare Tire
Your Mazda has a temporary spare tire.
The temporary spare tire is lighter and
smaller than a conventional tire, and is
designed only for emergency use and
should be used only for VERY short
periods. Temporary spare tires should
NEVER be used for long drives or
extended periods.
WARNING
Do not install the temporary spare tire
on the front wheels (driving wheels):Driving with the temporary spare tire
on one of the front driving wheels is
dangerous. Handling will be affected.
You could lose control of the vehicle,
especially on ice or snow bound roads,
and have an accident. Move a regular
tire to the front wheel and install the
temporary spare tire to the rear.
CAUTION
 When using the temporary spare tire,
driving stability may decrease compared
to when using only the conventional tire.
Drive carefully.
 To avoid damage to the temporary
spare tire or to the vehicle, observe the
following precautions:
 Do not exceed 80 km/h (50 mph). Avoid driving over obstacles. Also, do
not drive through an automatic car
wash. This tire's diameter is smaller
than a conventional tire, so the
ground clearance is reduced.
 Do not use a tire chain on this tire
because it will not fit properly. Do not use your temporary spare
tire on any other vehicle, it has been
designed only for your Mazda.
 Use only one t emporary spare tire on
your vehicle at the same time.
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7–6
If Trouble Arises
Flat Tire
To remove the spare tire
1. Lift the trunk/luggage compartment
mat.

Trunk/Luggage compartment mat
2. Turn the spare tire hold-down bolt
counterclockwise.

Spare tire hold-down bolt
To secure the spare tire
Store the spare tire in the reverse order
of removal. After storing, verify that the
spare tire is stored securely.
Changing a Flat Tire
NOTE
If the following occurs while driving, it
could indicate a flat tire.
 Steering becomes difficult. The vehicle begins to vibrate
excessively. The vehicle pulls in one direction.
If you have a flat tire, drive slowly to a
level spot that is well off the road and out
of the way of traffic to change the tire.
Stopping in traffic or on the shoulder of a
busy road is dangerous.
WARNING
Be sure to follow the directions for
changing a tire:
Changing a tire is dangerous if not
done properly. The vehicle can slip off
the jack and seriously injure someone.
No person should place any portion
of their body under a vehicle that is
supported by a jack.
Never allow anyone inside a vehicle
supported by a jack: Allowing someone to remain in
a vehicle supported by a jack is
dangerous. The occupant could cause
the vehicle to fall resulting in serious
injury.
NOTE
Make sure the jack is well lubricated
before using it.
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