key battery MAZDA MODEL CX-50 2023 User Guide

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. Put the vehicle in park (P). If you must restart the engine while the
vehicle is moving, shift into neutral
(N).
NOTE
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 4-7.
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
7-26.
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 7-26).
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).
When Driving
Start/Stop Engine
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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 7-26). 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
brake pedal 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.
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 idlefor 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 7-14).
▼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.
When Driving
Start/Stop Engine
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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. 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 buttonstart indicator light (green) turns
on.
6. Press the push button start to start the engine.
NOTE
The engine cannot be started
unless the brake pedal is fully
depressed.
If there is a malfunction with the
push button start function, the
push button start indicator light
(amber) flashes. In this case, the
engine may start, however, have
the vehicle checked at an
Authorized Mazda Dealer as
soon as possible.
If the push button start indicator
light (green) does not illuminate,
perform the operation from the
beginning again. If it does not
illuminate, have the vehicle
checked at an Authorized Mazda
Dealer.
To switch the ignition position
without starting the engine,
perform the following operations
after the push button start
indicator light (green) turns on.
1. Release the brake pedal.
2. Press the push button start toswitch the ignition position.
The ignition switches in the
order of ACC, ON, and off
each time the push button
start is pressed. To switch the
ignition position again,
perform the operation from
the beginning.
When Driving
Start/Stop Engine
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NOTE
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 7-26.
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.
Cylinder Deactivation*
▼ Cylinder Deactivation
The cylinder deactivation is a function
designed to reduce fuel consumption
and improve fuel economy by
deactivating 2 out of the 4 cylinders
while driving. The function constantly
determines which is better for driving;
4 cylinders or 2 cylinders, regardless of
the driver's operations, and it performs
the switching automatically.
When the cylinder deactivation
function does not operate
The cylinder deactivation function
does not operate under the following
conditions.
The selector lever is in the P, N, or R
position.
The engine oil temperature or engine
coolant temperature is low.
After disconnecting the battery
terminals for some reason, such as
for battery replacement.
When Driving
Start/Stop Engine
4-10*Some models.
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(When the vehicle is stopped by the
MRCC with Stop & Go function/TJA
stop hold control)
1. When the vehicle is stopped by theMRCC with Stop & Go function/
TJA, engine idling stops and
continues to be stopped without
depressing the brake pedal.
2. When the accelerator pedal is depressed or the RES switch is
operated, while the vehicle is
stopped by the MRCC with Stop &
Go function/TJA, the engine will
automatically restart if the selector
lever is in the D/M position (not in
second gear fixed mode).
(When the vehicle is stopped by the
AUTOHOLD function)
1. When the brake pedal is depressed while the vehicle is being driven
and the vehicle comes to a stop,
the i-stop function will operate and
continue to operate even if the
brake is released (except when
driving in the R or M position
second gear fixed mode).
2. The engine restarts automatically when the accelerator pedal is
depressed with the selector lever in
the D/M position (not in second
gear fixed mode).
3. If the selector lever is in the N or P position, the engine does not
restart when the brake pedal is
released. The engine restarts when
the brake pedal is depressed again
or the selector lever is shifted to the
D, M (not in second gear fixed
mode) or the R position. (For the
purposes of safety, always keep the
brake pedal depressed when
shifting the selector lever while
engine idling is stopped.)(When using MRCC with Stop & Go
function/TJA)
1. Engine idling stops when thevehicle has decelerated to about 20
km/h (12 mph) or slower while in
headway control using the MRCC
with Stop & Go function/TJA.
2. If it is necessary to accelerate while in headway control using the MRCC
with Stop & Go function/TJA, the
engine restarts automatically.
Operation conditions
Under the following conditions, engine
idling stops and the i-stop indicator
light (green) turns on.
The engine has been started and the
vehicle is driven for a certain period.
The engine is started with the hood
closed.
All doors, liftgate, and hood are
closed.
The driver's seat belt is unfastened
and the driver's door is opened.
The hood is opened.The air conditioner is not operating
with the airflow mode in the
position.The temperature setting dial of the
air conditioner is in a position other
than maximum heating or maximum
cooling (A/C ON) position.
(Automatic climate control system)
The vehicle's interior temperature
and the set temperature for the air
conditioner are nearly the same.
The i-stop warning light (amber) is
not turned on/flashing.
The keyless entry & push button start
system functions are normal.
The brake vacuum is sufficiently high.The battery is in good condition.
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............... 6-11 Owner Maintenance
Precautions......................... 6-11
Hood.................................. 6-12
Engine Compartment
Overview............................ 6-14
Engine Oil........................... 6-16
Engine Coolant.................... 6-19
Brake Fluid.......................... 6-20
Washer Fluid....................... 6-21
Body Lubrication.................. 6-22
Wiper Blades....................... 6-22
Battery................................ 6-27
Key Battery Replacement...... 6-29
Tires.................................... 6-31
Light Bulbs...........................6-34
Fuses.................................. 6-35
Appearance Care.................... 6-43 Exterior Care....................... 6-43
Interior Care........................ 6-49
6-1
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Key Battery Replacement
▼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 (CR2032 or equivalent).
The following conditions indicate that
the battery power is low:
A message, “Low Key Fob Battery.
Replace Battery” is displayed on the
multi-information display when the
ignition is switched OFF.
The system does not operate and the
operation indicator light on the
transmitter does not flash when the
buttons are pressed.
The system's operational range is
reduced.
Incorrect battery replacement
operation may damage the key.
Replacing the battery at an Authorized
Mazda Dealer is recommended. If
replacing the battery by yourself,
follow the instruction.
Replacing the key battery
1. Remove the lower cover while sliding the knob in the direction of
the arrow.
2. Press in the tab to unlock the upper
cover.
Maintenance and Care
Owner Maintenance
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▼Tire Pressure Monitoring System
(TPMS) Warning Indication/
Warning Light (Flashing)
If there is a problem with the TPMS or
the voltage of a tire pressure sensor
decreases, the TPMS warning light
flashes and a message is displayed on
the multi-information display. Have
your vehicle inspected by an
Authorized Mazda Dealer.
WARNING
Do not drive the vehicle at high
speeds if the TPMS warning light turns
on or flashes:
Driving the vehicle at high speeds
while the TPMS warning light is turned
on or flashing is dangerous because
the brake performance and the
steering wheel operability will be
reduced. If the vehicle is driven at high
speeds or the brakes are suddenly
applied, it could lead to an accident.
Gradually apply the brakes to lower the
vehicle's speed.
Do not ignore the TPMS warning light
when it is turned on or flashing:
Continuing to drive the vehicle while
ignoring the illumi
nation/flashing of
the TPMS warning light is dangerous
because a tire may burst which could
lead to an accident. Take appropriate
measures as soon as possible.
▼ KEY Warning Indication/Warning
Light (Red)
“Keyless Entry System Malfunction.
Have the Vehicle Inspected” is
displayed
This message is displayed if the
advanced keyless entry & push button
start system has a problem.
Contact an Authorized Mazda Dealer.
CAUTION
If the message is indicated, or the push
button start indicator light (amber)
flashes, the engine may not start. If the
engine cannot be started, try starting it
using the emergency operation for
starting the engine, and have the
vehicle inspected at an Authorized
Mazda Dealer as soon as possible.
Refer to Emergency Operation for
Starting the Engine on page 4-9.
“Key Not Detected” is displayed
If the presence of the key cannot be
detected (dead battery, battery
malfunction, no key), it is displayed
when the driver attempts to start the
engine (push button start operation,
brake pedal depression).
Displayed when it is determined that
a key that was in the vehicle has
been removed from the vehicle. (Key
taken out warning. Other than
IG-OFF).
If Trouble Arises
Warning/Indicator Lights and Warning Sounds
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CAUTION
Adjust the tire pressures while the
tires are cool. Because the air
pressure in the tires fluctuates
depending on the temperature,
before adjusting the tire pressures,
let the vehicle sit for an hour or drive
it only within a 1.6 km (1 mile)
distance. If the tire pressures are
adjusted while the tires are warm,
the tire pressures may decrease
below the
specified air pressure after
cooling down which could turn on
the warning light. In addition,
because the air pressure in the tires
decreases when the ambient
temperature is low, if the ambient
temperature increases, an
illuminated TPMS warning light may
turn off. Under any circumstances,
always adjust the tire pressures while
the tires are cool.
 After adjusting the tire pressures, the
TPMS warning light turns off. If the
TPMS warning light does not turn
off,
drive the vehicle at a speed of about
25 km (16 mph) or faster for 3
minutes or longer and make sure the
warning light turns off.
If the TPMS warning light remains on
even after adjusting the tire pressures,
one of the tires may have a puncture.
▼ KEY Indicator Light (Green)
(Flashing)
“Low Key Fob Battery. Replace
Battery” is displayed/When the light
is flashing
When the key battery is low, the
indication is displayed when the
ignition is switched OFF.
Action to be taken
Replace the key battery.
If Trouble Arises
Warning/Indicator Lights and Warning Sounds
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Display*1*2*3ContentAction to be taken
Mazda Radar Cruise
Control Canceled. Drive
Safely This message is indicated when the
Mazda Radar Cruise Control with
Stop & Go function (MRCC with Stop
& Go function), and the Traffic Jam
Assist (TJA) have been canceled other
than by the driver.
Have your vehicle inspected by an
Authorized Mazda Dealer.
Distance & Speed Alert
Operation Canceled
Drive Safely This message is indicated when the
Distance & Speed Alert (DSA) have
been canceled other than by the driv-
er.
Have your vehicle inspected by an
Authorized Mazda Dealer.
Cruise Control Opera-
tion Canceled. Drive
Safely This message is indicated when the
Cruise Control have been canceled
other than by the driver.
Have your vehicle inspected by an
Authorized Mazda Dealer.
Emergency Braking Acti-
vated. Depress Brake
Pedal to Hold Stop This message is indicated after the
Smart Brake Support (SBS) brakes op-
erate and when the Smart Brake Sup-
port (SBS) is canceled.
Depress the brake pedal.
Touch Key Fob to Push
Button Start Switch This message is indicated when the
key battery is weak (battery dead or
damaged key). Touch the key against push button
start to start the engine.
Refer to Engine Start Function When
Key Battery is Dead on page 4-7.
Depress Brake Pedal to
Start Vehicle This message is indicated when the
push button start is pressed without
depressing the brake pedal. When starting the engine, press the
push button start with the brake ped-
al depressed.
Check Gear Selector
Lever Position This message is indicated when the
selector lever is shifted to the P or R
position while driving.
Check the selector lever position.
Close Door and Fasten
Seat Belt This message is indicated when AU-
TOHOLD is about to operate and a
door is opened or a seat belt is unfas-
tened. When the AUTOHOLD is turned on,
close the doors and fasten seat belts.
Wiper Blades Must Be
on Windshield Before
Operating This message is indicated when the
ignition is switched ON with the wip-
er arms at the service positions.
Return the wiper arms to the initial
positions.
Windshield Wiper Range
of Motion Reduced. Re-
move Obstruction(s) This message is indicated when there
is snow or dirt accumulation on the
windshield and the wiper operation
range is narrowed.
Remove foreign matter from the
windshield.
Ve h i c l e N o t S w i t c h e d
Off This message is indicated when the
driver’s door is opened without
switching the ignition OFF.
Switch the ignition OFF before leaving
the vehicle.
If Trouble Arises
Warning/Indicator Lights and Warning Sounds
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