2021 MAZDA MODEL CX-30 key battery

Theft-Deterrent System*
▼Theft-Deterrent System
If the theft-deterrent system detects an
inappropriate entry into the vehicle,
which could result in the vehicle or its
contents being stolen, the alarm alerts
the surrounding area of an abnormality
by sounding the horn and flashing the
hazard warning lights.

The system will not function unless it's
properly armed. So when you leave the
vehicle, follow the arming procedure
correctly.
▼Operation
System triggering conditions
The horn sounds intermittently and the
hazard warning ligh
ts flash for about
30 seconds when the system is
triggered by any one of the following:
Unlocking a door with the auxiliary
key, door lock switch, or an inside
door-lock knob.
Forcing open a door, the hood or the
liftgate.
Opening the hood by operating the
hood release handle.
Switching the ignition ON without
using the push button start.
If the system is triggered again, the
lights and horn will activate until the
driver's door or the liftgate is unlocked
with the transmitter.
(With the advanced keyless function)
The lights and horn can also be
deactivated by touching the sensing
area of the door release touch sensor.
NOTE
If the battery goes dead while the
theft-deterrent system is armed, the
horn will activate and the hazard
warning lights will flash when the
battery is charged or replaced.
▼ How to Arm the System
1. Close the windows and the
moonroof* securely.
2. Switch the ignition OFF.
3. Make sure the hood, the doors, and the liftgate are closed.
4. Press the lock button on the transmitter.
The hazard warning lights will flash
once.
The following method will also arm
the theft-deterrent system:
Press the door-lock switch “
”
while any door is open and then
close all of the doors.
(With the advanced keyless
function)
Touch the sensing area of the door
lock touch sensor.

The security indicator light in the
instrument cluster flashes twice per
second for 20 seconds.
5. After 20 seconds, the system is fully armed.
Before Driving
Security System
*Some models.3-47
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Ignition Switch
▼Push Button Start Positions
The system operates only when the key
is within operational range.
Each time the push button start is
pressed, the ignition switches in the
order of
off, ACC, and ON. Pressing
the push button start again from ON
switches the ignition off.
1. Indicator light
2. Push button start
NOTE
The engine starts by pressing the
push button start while depressing
the clutch pedal (manual
transmission) or the brake pedal
(automatic transmission). To switch
the ignition position, press the push
button start without depressing the
pedal.
Do not leave the ignition switched
ON while the engine is not running.
Doing so could result in the battery
going dead. If the ignition is left in
ACC (For automatic transmission,
the selector lever is in the P position,
and the ignition is in ACC), the
ignition switches off automatically
after about 25 minutes.
Off
The power supply to electrical devices
turns off and the indicator light
(amber) also turns off.
WARNING
Before leaving the driver's seat,
always switch the ignition off, set the
parking brake, and make sure the
selector lever is in P (automatic
transmission) position or in 1st gear
or R (manual transmission):
Leaving the driver's seat without
switching the ignition off, setting the
parking brake, and shifting the selector
lever to P (automat ic transmission)
position or to 1st gear or R (manual
transmission) is dangerous.
Unexpected vehicle movement could
occur which could result in an
accident.
In addition, if your intention is to leave
the vehicle for even a short period, it is
important to switch the ignition off, as
leaving it in another position will
disable some of the vehicle's security
systems and run the battery down.
ACC (Accessory)
Some electrical accessories will
operate and the indicator light (amber)
illuminates.
NOTE
The keyless entry system does not
function while the push button start
has been pressed to ACC, and the
doors will not lock/unlock even if they
have been locked manually.
When Driving
Start/Stop Engine
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ON
This is the normal running position
after the engine is started. The
indicator light (amber) turns off. (The
indicator light (amber) illuminates
when the ignition is switched ON and
the engine is not running.)
Some indicator lights/warning lights
should be inspected before the engine
is started.
Refer to Warning/Indicator Lights on
page 4-22.
Refer to Indication/Indicator Lights on
page 4-24.
NOTE
When the push button start is pressed
to ON, the sound of the fuel pump
motor operating near the fuel tank can
be heard. This does not indicate an
abnormality.
Starting the Engine
▼ Starting the Engine
WARNING
Radio waves from the key may affect
medical devices such as pacemakers:
Before using the key near people who
use medical devices, ask the medical
device manufacturer or your physician
if radio waves from the key will affect
the device.
NOTE
The key must be carried because the
key carries an immobilizer chip that
must communicate with the engine
controls at short range.
The engine can be started when the
push button start is pressed from off,
ACC, or ON.
The push button start system
functions (function which can start
the engine by only carrying the key)
can be deactivated to prevent any
possible adverse effect on a user
wearing a pacemaker or other
medical device. If the system is
deactivated, you will be unable to
start the engine by carrying the key.
Consult an Authorized Mazda Dealer
for details. If the push button start
system functions have been
deactivated, you can start the engine
by following the procedure indicated
when the key battery goes dead.
Refer to Engine Start Function When
Key Battery is Dead on page 4-8.
When Driving
Start/Stop Engine
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After starting a cold engine, the
engine speed increases and a
whining sound from the engine
compartment can be heard.
This is for improved exhaust gaspurification and does not indicate
any parts defect.
Engine-starting is controlled by the
spark ignition system.
This system meets all Canadian
Interference-Causing Equipment
Standard requirements regulating the
impulse electrical field strength of
radio noise.
1. Make sure you are carrying the key.
2. Occupants should fasten their seat belts.
3. Make sure the parking brake is on.
4. Continue to depress the brake
pedal firmly until the engine has
completely started.
5. (Manual transmission)
Continue to depress the clutch
pedal
firmly until the engine has
completely started.
(Automatic transmission)
Put the vehicle in park (P). If you
must restart the engine while the
vehicle is moving, shift into neutral
(N).
NOTE
(Manual transmission)
The starter will not operate if the
clutch pedal is not depressed
sufficiently.
(Automatic transmission)
The starter will not operate if the
selector lever is not in P or N
position and the brake pedal is
not depressed sufficiently.
6. Make sure that the KEY indicator
light (green) in the instrument
cluster and push button start
indicator light (green) turns on.
1. Indicator light
2. Push button start
NOTE
If the push button start indicator
light (green) flashes, make sure
that the key is being carried.
If the push button start indicator
light (green) flashes with the key
being carried, touch the key to
the push button start and start
the engine.
Refer to Engine Start Function
When Key Battery is Dead on
page 4-8.
CAUTION
If the KEY warning indication (red)
is displayed, or the push button
start indicator light (amber) flashes,
this could indicate a problem with
the engine starting system. This may
prevent the engine from starting or
from switching the ignition to ACC
or ON.
Refer to KEY Warning Indication/
Warning Light (Red) on page
7-28.
When Driving
Start/Stop Engine
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Have your vehicle inspected at an
Authorized Mazda Dealer as soon
as possible.
NOTE
Under the following conditions,
the KEY warning indication (red)
is displayed after the push button
start is pressed. This informs the
driver that the push button start
will not switch to ACC, even if it
is pressed from off (page 7-28).
The key battery is dead.The key is out of operational
range.
The key is placed in areas where
it is difficult for the system to
detect the signal (page 3-7).
A key from another
manufacturer similar to the key
is in the operational range.
(Forced engine starting method)
If the KEY warning indication
(red) is displayed, or the push
button start indicator light
(amber)
flashes, this could
indicate that the engine may not
start using the usual starting
method (page 7-28). Have your
vehicle inspected at an
Authorized Mazda Dealer as
soon as possible. If this occurs,
the engine can be force-started.
Press and hold the push button
start until the engine starts. Other
procedures necessary for starting
the engine, such as having the key
in the cabin, and depressing the
clutch pedal (manual
transmission) or the brake pedal
(automatic transmission) are
required.
When the engine is force-started,
the KEY warning indication (red)
remains displayed and the push
button start indicator light
(amber) remains flashing.
(Automatic transmission)
When the selector lever is in the
neutral (N) position, the push
button start indicator light (green)
does not turn on.
7. Press the push button start after the push button start indicator light
(green) turns on.
NOTE
After starting the engine, the push
button start indicator light
(amber) turns off and the ignition
switches to the ON position.
After pressing the push button
start and before the engine starts,
the operation sound of the fuel
pump motor from near the fuel
tank can be heard, however, this
does not indicate a malfunction.
8. After starting the engine, let it idle for about 10 seconds.
NOTE
Do not use high engine speeds
until reaching the operating
temperature.
Whether the engine is cold or
warm, it should be started
without the use of the
accelerator.
If the engine does not start the
first time, refer to Starting a
Flooded Engine under Emergency
Starting. If the engine still does
not start, have your vehicle
inspected by an Authorized
Mazda Dealer (page 7-16).
When Driving
Start/Stop Engine
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▼Engine Start Function When Key
Battery is Dead
CAUTION
When starting the engine by holding
the transmitter over the push button
start due to a dead key battery or a
malfunctioning key, be careful not to
allow the following, otherwise the
signal from the key will not be received
correctly and the engine may not start.

Metal parts of other keys or metal
objects touch the key.
Spare keys or keys for other vehicles
equipped with an immobilizer
system touch or come near the key.
Devices for electronic purchases, or
security passage touch or come near
the key.
If the engine cannot be started due to
a dead key battery, the engine can be
started using the following procedure:
1. Continue to depress the brake
pedal firmly until the engine has
completely started.
2. (Manual transmission)
Continue to depress the clutch
pedal firmly until the engine has
completely started.
(Automatic transmission)
Put the vehicle in park (P). If you
must restart the engine while the
vehicle is moving, shift into neutral
(N).
3. Make sure that the push button start indication light (green) flashes.
4. Align the center area of the emblem on the transmitter with the
center area of the push button start
while the push button start
indicator light (green) flashes.

1. Indicator light
2. Push button start
3. Transmitter
4. Emblem

5. Make sure that the push button
start indicator light (green) turns
on.
6. Press the push button start to start the engine.
When Driving
Start/Stop Engine
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Turning the Engine Off
▼Turning the Engine
Off
WARNING
Do not stop the engine while the
vehicle is moving:
Stopping the engine while the vehicle
is moving for any reason other than in
an emergency is dangerous. Stopping
the engine while the vehicle is moving
will result in reduced braking ability
due to the loss of power braking ,
which could cause an accident and
serious injury.
1. Stop the vehicle completely.
2.(Manual transmission)
Shift into neutral and set the
parking brake.
(Automatic transmission)
Shift the selector lever to the P
position and set the parking brake.
3. Press the push button start to turn
off the engine. The ignition position
is off.
CAUTION
 When leaving the vehicle, make sure
the push button start is off.
NOTE
(SKYACTIV-G)
The cooling fan in the engine
compartment could turn on for a few
minutes after the ignition is switched
from ON to OFF, whether or not the
A/C is on or off, to cool the engine
compartment quickly.
If the system detects that the
remaining battery power of the key is
low when the ignition is switched
from ON to ACC or OFF, the
following is indicated.
Replace with a new battery before
the key becomes unusable.
Refer to Key Battery Replacement on
page 6-29.
A message is indicated in the display
of the instrument cluster.
Refer to KEY Warning Indication/
Warning Light (Red) on page 7-28.
(Automatic transmission)
If the engine is turned off while the
selector lever is in a position other
than P, the ignition switches to ACC.
▼ Emergency Engine Stop
Continuously pressing the push button
start or quickly pressing it any number
of times while the engine is running or
the vehicle is being driven will turn the
engine off immediately. The ignition
switches to ACC.
When Driving
Start/Stop Engine
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6Maintenance and Care
How to keep your Mazda in top condition.
Essential Information................. 6-2 Introduction.......................... 6-2
Scheduled Maintenance............ 6-4 Scheduled Maintenance......... 6-4
Owner Maintenance............... 6-12 Owner Maintenance
Precautions......................... 6-12
Hood.................................. 6-13
Engine Compartment
Overview............................ 6-15
Engine Oil........................... 6-17
Engine Coolant.................... 6-19
Brake/Clutch Fluid............... 6-21
Washer Fluid....................... 6-21
Body Lubrication.................. 6-22
Wiper Blades....................... 6-23
Battery................................ 6-28
Key Battery Replacement...... 6-29
Tires.................................... 6-31
Light Bulbs...........................6-35
Fuses.................................. 6-35
Appearance Care.................... 6-43 Exterior Care....................... 6-43
Interior Care........................ 6-49
6-1
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