2020 MAZDA MODEL 3-SEDAN ECU

(Vehicles without flat tire hold-down
bolt)
1. Secure the damaged tire to thevehicle using the spare tire
hold-down bolt removed when
removing the spare tire.
9. Place the trunk mat (4-door) orluggage mat (5-door) on the damaged
tire.
10. Remove the tire blocks and store thetools and jack.
11. Check the inflation pressure. Refer to Tires on page 9-9.
12. Have the flat tire repaired or replaced
as soon as possible.
13. After repairing or replacing the flat
tire, install the wheel cover (vehicles
with steel wheels) or center cap
(vehicles with alumi num wheels) using
the following procedure.
(Wheel cover)
1. Align the notch on the wheel cover with the tire valve of the wheel and
install the whee l cover to the
wheel.
1. Notch
2. Tire valve
CAUTION
Always align the notch on the wheel
cover with the tire valve of the
wheel. Otherwise, it could cause
damage to the wheel cover and the
tire valve.
(Center cap)
1. Align the center cap with the center hole of the wheel and install the
center cap to the wheel.
If Trouble Arises
Flat Tire
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Connect the negative cable to a good ground point away from the battery:
Connecting the end of the second jumper cable to the negative (–) terminal of the discharged
battery is dangerous.
A spark could cause the gas around the battery to explode and injure someone.
Route the jumper cables away from parts that will be moving:
Connecting a jumper cable near or to moving parts (cooling fans, belts) is dangerous. The
cable could get caught when the engine starts and cause serious injury.
CAUTION
Use only a 12 V booster system. You can damage a 12 V starter, ignition system, and other
electrical parts beyond repair with a 24 V power supply (two 12 V batteries in series or a 24 V
motor generator set).
1. Move the booster vehicle so that its battery is as close as p ossible to your vehicle's
battery.
2. Make sure that the power such as for the headlights and air c onditioner is turned off.
3. Remove the battery cover.
4. Turn off the booster vehicle's engine and connect the jumper cables in the following
order.
Make sure that the jumper cables are securely connected so that they do not disconnect
due to engine vibrations.
1st lead
Positive (+) terminal o n the discharged battery
Positive (+) terminal on booster vehicle's battery
2nd lead
Negative (-) terminal on booster vehicle's battery
If Trouble Arises
Battery Runs Out
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Do not tow with sling-type equipment.
This could damage your vehicle. Use
wheel-lift or
flatbed equipment.

If the parking brake cannot be released
when towing the vehicle, transport the
vehicle with all front and rear wheels
raised off the ground as shown in the
figure. If the vehicle is towed without
raising the wheels off the ground, the
brake system could be damaged.
1. Wheel dollies
Tiedown Hooks*
▼ Tiedown Hooks
CAUTION
Do not use the front and rear tiedown
eyelets for towing the vehicle.
They have been designed only for securing
the vehicle to a transport vessel during
shipping.
Using the eyelets for any other purpose
could result in the vehicle being damaged.
1. Remove the tiedown eyelet and the lug
wrench from the luggage compartment
(page 7-3).
2. Wrap a flathead screwdriver or similar tool with a soft cloth to prevent
damage to a painted bumper, and open
the cap located on the front or rear
bumper.
Front
(4–Door)
If Trouble Arises
Emergency Towing
7-24*Some models.
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(5–Door)
Rear
(4–Door)
(5–Door)
CAUTION
Do not use excessive force as it may
damage the cap or scratch the painted
bumper surface.
NOTE
Remove the cap completely and store it
so as not to lose it.
3. Securely install the tiedown eyelet using the lug wrench.
Front
(4–Door)
1. Lug wrench
2. Tiedown eyelet

(5–Door)
1. Lug wrench
2. Tiedown eyelet

If Trouble Arises
Emergency Towing
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Rear
(4–Door)
1. Lug wrench
2. Tiedown eyelet

(5–Door)

4. Hook the tying rope to the tiedown eyelet.
CAUTION
If the tiedown eyelet is not securely
tightened, it may loosen or disengage
from the bumper when tying the
vehicle. Make sure that the tiedown
eyelet is securely tightened to the
bumper.
If Trouble Arises
Emergency Towing
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When the light is flashing
The light flashes if the Electric Parking
Brake (EPB) has a malfunction. If the light
remains flashing even if the Electric
Parking Brake (EPB) switch is operated,
consult an Authorized Mazda Dealer as
soon as possible.
▼Brake Override Warning Indication
This message is displayed when the
accelerator pedal and brake pedal are
depressed at the same time while driving.
Release the accelerator pedal and depress
the brake pedal.
▼Check Engine Indication/Light
If this light illuminates while driving, the
vehicle may have a problem. It is
important to note the driving conditions
when the light illuminated and consult an
Authorized Mazda Dealer.
The check engine light may illuminate in
the following cases:
The engine's electrical system has a
problem.
The emission control system has a
problem.
The fuel tank level being very low or
approaching empty.
The fuel-filler cap is missing or not
tightened securely.
If the check engine light remains on, or it
flashes continuously , do not drive at high
speeds and consult an Authorized Mazda
Dealer as soon as possible.
WA R N I N G
If the check engine light turns on, do not
disconnect the battery cables.
If the battery cables are disconnected and
then reconnected, the engine could be
damaged and catch on
fire.
▼Automatic Transmission Warning
Indication/Warning Light*
The indication/light illuminates when the
transmission has a problem.
CAUTION
If the automatic transmission warning
indication/light illuminates, the
transmission has an electrical problem.
Continuing to drive your Mazda in this
condition could cause damage to your
transmission. Consult an Authorized
Mazda Dealer as soon as possible.
▼AWD Warning Indication/Warning
Light*
If Trouble Arises
Warning/Indicator Lights and Warning Sounds
*Some models.7-31
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Action to be taken
Fasten the seat belts.
▼Seat Belt Warning Light (Rear seat)
(Red)
If the rear seat belts are not fastened while
the ignition is swit
ched ON , the driver
and the passenger are alerted by the
warning light.
The warning light oper ates even if there is
no passenger on the rear seat.
NOTE
If a rear seat belt is not fastened by a
certain period of time after the engine has
been started, the warning light turns off.
Action to be taken
Fasten the seat belts.
▼ Low Washer Fluid Level Warning
Indication/Warning Light*
This warning light i
ndicates that little
washer fluid remains.
Action to be taken
Add washer fluid (page 6-19).
▼ Door-Ajar/Trunk lid-Ajar/
Liftgate-Ajar Warning Indication/
Wa r n i n g L i g h t
The light turns on if any door/trunk lid/
liftgate is not closed securely.
Action to be taken
Close the door/trunk lid/liftgate securely.
▼Tire Pressure Monitoring System
(TPMS) Warning Indication/
Warning Light (Turns on)
If a tire pressure decreases below the
specified air pressure
, the TPMS warning
light turns on.
At the same time, a message and the tire
pressure of each tire are displayed on the
multi-information display alternately. In
addition, the tire (s) with low air pressure
is displayed in yellow.
If Trouble Arises
Warning/Indicator Lights and Warning Sounds
7-36*Some models.
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Index
Head restraint.............................. 2-17
Rear seat...................................... 2-14
Seat warmer................................. 2-20
Seat Belt System
Automatic locking....................... 2-25
Emergency locking...................... 2-25
Extender....................................... 2-30
Pregnant women.......................... 2-25
Seat belt precautions................... 2-23
Seat Belt Warning Beep.................... 7-41
Security System
Immobilizer system..................... 3-40
Theft-deterrent system.................3-42
Shift Position Warning Beep.............7-43
Smart Brake Support (S BS)............ 4-155
Collision warning.... .................. 4-156
Stopping the Smart Brake Support
(SBS) system operation............. 4-157
Smart Brake Support [Rear Crossing]
(SBS-RC)........................................ 4-161
Collision warning.... .................. 4-165
Stopping the Smart Brake Support
[Rear Crossing] (SBS-RC) system
operation.................................... 4-165
Smart Brake Support [Rear] (SBS-
R)..................................................... 4-157
Collision warning.... .................. 4-160
Stopping the Smart Brake Support
[Rear] (SBS-R) system
operation.................................... 4-160
Spare Tire............................................ 7-5
Spare Tire and Tool Storage............... 7-3
Specifications Air conditioner......... ..................... 9-8
Capacities.......................................9-5
Dimensions.................................... 9-6
Electrical system............................9-4
Engine............................................ 9-4
Light bulbs.....................................9-8
Lubricant quality........................... 9-4
Tires............................................... 9-9Weights.......................................... 9-6
SRS Air Bags Driver and front passenger occupant
classification system.................... 2-71
How the SRS air bags work........ 2-64
Limitations to SRS air bag.......... 2-70
Monitoring................................... 2-76
SRS air bag deployment
criteria.......................................... 2-68
Supplemental restraint system
components.................................. 2-62
Supplemental restraint system (SRS)
precautions................................... 2-55
Starting the Engine..............................4-5
Steering Wheel Heated steering wheel................. 2-21
Horn............................................. 4-57
Storage Compartments...................... 5-41 Center console............................. 5-42
Glove compartment..................... 5-42
Overhead console........................ 5-42
Storage pocket............................. 5-42
Storage Pocket...................................5-42
Sunshade............................................3-39
Sunvisors........................................... 5-34
T
Theft-Deterrent System..................... 3-42
Three-flash Turn Signal.................... 4-50
Tiedown Hook...................................7-24
Tires................................................... 6-31 Replacing a tire........................... 6-33
Replacing a wheel....................... 6-34
Snow tires.................................... 3-47
Specifications.................................9-9
Temporary spare tire....................6-33
Tire chains................................... 3-48
Tire inflation pressure................. 6-31
Tire rotation................................. 6-32
10-8
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