ignition MAZDA MODEL CX-50 2023 Service Manual

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
4-7
CX-50_8KB8-EA-22A_Edition2_new 2022-1-6 14:55:18

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
4-8
CX-50_8KB8-EA-22A_Edition2_new 2022-1-6 14:55:18

▼Emergency Operation for Starting
the Engine
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.
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.
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. 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.
When Driving
Start/Stop Engine
4-9
CX-50_8KB8-EA-22A_Edition2_new 2022-1-6 14:55:18

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.
CX-50_8KB8-EA-22A_Edition2_new
2022-1-6 14:55:18

i-stop*
▼i-stop
The i-stop function automatically stops
the engine when the vehicle is stopped
at a
traffic light or stuck in
traffic, and
then restarts the engine automatically
to resume driving. The system provides
improved fuel economy, reduced
exhaust gas emissions, and eliminates
idling noise while the engine is
stopped.
Engine idle stopping and restarting
NOTE
After parking the vehicle, make sure
that the ignition is switched OFF.
There is the possibility of the vehicle
moving if the vehicle is parked while
i-stop is operating.
The i-stop indicator light (green)
turns on under the following
conditions:
When engine idling is stopped.
The i-stop indicator light (green)
turns off when the engine is
restarted.
(AUTOHOLD operation turned off)
1. Stop the vehicle by depressing the
brake pedal and then the clutch
pedal.
2. While depressing the clutch pedal, shift the shift lever to the neutral
position. Engine idling stops after
the clutch pedal is released.
3. The engine restarts automatically when the clutch pedal is depressed.
(When the vehicle is stopped by the
AUTOHOLD function)
1. Bring the vehicle to a complete stop by depressing the brake pedal first
and then the clutch pedal.
2. While depressing the clutch pedal, shift the shift lever to neutral. After
releasing your foot from the clutch
pedal, engine idling stops and
continues to be stopped even if the
brake pedal is released.
3. The engine restarts automatically when the clutch pedal is depressed.
Engine idle stopping and restarting
while vehicle is stopped
(AUTOHOLD operation turned off and
When not using Mazda Radar Cruise
Control with Stop & Go function
(MRCC with Stop & Go function)/
Tra ffi c Ja m A s s i s t ( TJ A ) )
1. Engine idling stops when the brake pedal is depressed while the vehicle
is driven (except for driving in the R
or M position second gear fixed
mode) and the vehicle is stopped.
2. The engine restarts automatically when the brake pedal is released
with the selector lever in the D or
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 Driving
Start/Stop Engine
*Some models.4-11
CX-50_8KB8-EA-22A_Edition2_new 2022-1-6 14:55:18

WARNING
Do not rely completely on the vehicle
roll prevention function.
The vehicle roll prevention function
is a supplementary function which
operates for a maximum of 2
seconds after releasing the brake
pedal and accelerating the vehicle
from an engine idling stop condition.
Over reliance on the system may
result in an unexpected accident if
the vehicle were to suddenly
accelerate. Before starting to drive
the vehicle, always confirm the safety
of the surroundings and operate the
selector lever, brake pedal, and
accelerator pedal appropriately.
Note that the vehicle may move
suddenly depending on the vehicle's
load or if it is towing something.
 Note that the vehicle may move
suddenly after the vehicle roll
prevention function is released while
the vehicle is under the following
conditions:
 The selector lever is in the N
position.
 If the selector lever is shifted to the
N position and the brake pedal is
released while the i-stop function
is operating, the brake force is
gradually released. To accelerate
the vehicle, release the brake pedal
after the engine restarts and shift
the selector lever to a position
other than the N position.
NOTE
When the vehicle is stopped on a
steep grade, the vehicle roll
prevention function does not
operate because engine idling is not
stopped.
The brake pedal response may
change, sound may occur from the
brakes, or the brake pedal could
vibrate from the operation of the
vehicle roll prevention function.
However, this does not indicate a
malfunction.
▼ i-stop Warning Light (Amber)/
i-stop Indicator Light (Green)
The i-stop system constantly monitors
the driver's operations, the vehicle's
interior and exterior environment, and
the operational status of the vehicle,
and uses the i-stop warning light
(amber) and i-stop indicator light
(green) to inform the driver of various
cautions and warnings.
NOTE
On vehicles equipped with the center
display, the i-stop operation status is
displayed in the fuel efficiency monitor
display.
Refer to the Fuel Efficiency Monitor
section in the Mazda Connect
Owner's Manual.
i-stop warning light (amber)
When the light is turned on
The light turns on when the ignition
is switched ON and turns off when
the engine is started.
If the i-stop warning light (amber)
remains on while the engine is
running , the battery performance
may have decreased. Have your
vehicle inspected by an Authorized
Mazda Dealer.
When Driving
Start/Stop Engine
4-16
CX-50_8KB8-EA-22A_Edition2_new
2022-1-6 14:55:18

NOTE
A problem in the system may be
indicated under the following
conditions. Have your vehicle
inspected by an Authorized Mazda
Dealer.
The light does not turn on when the
ignition is switched ON.
The light continues to remain on
while the engine is running.
When the light is flashing
The light continues to flash if the
system has a malfunction. Have your
vehicle inspected by an Authorized
Mazda Dealer.
i-stop indicator light (green)
When the light is turned on
The light turns on while engine idling is
stopped and turns off when the engine
is restarted.
When Driving
Start/Stop Engine
4-17
CX-50_8KB8-EA-22A_Edition2_new 2022-1-6 14:55:18

CAUTION
When the engine coolant temperature
gauge needle is in the red range, the
engine coolant temperature is
extremely high. Drive slowly to reduce
engine load. If the engine coolant
temperature gauge needle is in the red
range, there is the possibility of
overheating. Park the vehicle in a safe
place immediately and take
appropriate measures.
Refer to Overheating on page 7-15.
NOTE
If the engine or engine coolant
temperature is high or low, the
engine output may be restricted to
protect the engine.
▼Fuel Gauge
The fuel gauge shows approximately
how much fuel is re
maining in the tank
when the ignition is switched ON. We
recommend keeping the tank over 1/4
full.

1. Full
2. 1/4 Full
3. Empty

If the low fuel warning light illuminates
or the fuel level is very low, refuel as
soon as possible.
If inconsistency in engine performance
or stalling occurs due to low fuel level
conditions, refuel the vehicle as soon
as possible and add at least 10 L (2.7
US gal, 2.2 Imp gal) of fuel.
Refer to Low Fuel Warning Indication/
Warning Light on page 7-28.
NOTE
After refueling , it may require some
time for the indicator to stabilize. In
addition, the indicator may deviate
while driving on a slope or curve
since the fuel moves in the tank.
When Driving
Instrument Cluster and Display
4-23
CX-50_8KB8-EA-22A_Edition2_new 2022-1-6 14:55:18

The direction of the arrow ()
indicates that the fuel-filler lid is on
the left side of the vehicle.
▼ Dashboard Illumination
(Without auto-light control)
When the lights are turned on with the
ignition switched ON, the brightness of
the dashboard illumination is dimmed.
(With auto-light control)
When the lights are turned on with the
ignition switched ON, the brightness of
the dashboard illumination is dimmed.
However, when the light sensor
detects that the surrounding area is
bright such as when the lights are
turned on in the daytime, the
dashboard illumination does not dim.
NOTE
(With auto-light control)
When the ignition is switched ON in
the early evening or at dusk, the
dashboard illumination is dimmed
for several seconds until the light
sensor detects the brightness of the
surrounding area, however, the
dimming may cancel after the
brightness is detected.
When the lights are turned on, the
lights-on indicator light in the
instrument cluster turns on.
Refer to Headlights on page 4-49.
The brightness of the instrument panel
and dashboard illuminations can be
adjusted by pressing the dashboard
illumination switch while the
dashboard illumination is dimmed.
The brightness increases by pressing
the + switch.
The brightness decreases by pressing
the - switch. If you press the - switch
while the instrument cluster is at
maximum dimness, a sound is
activated to notify you that the
current dimmer setting is at
maximum dimness.

1. Bright
2. Dim
Function for canceling illumination
dimmer
The illumination dimmer can be
canceled by pressing the + switch
while the instrument cluster is at
maximum dimness and while the
ignition is switched ON. If you press
the + switch again while the
illumination dimmer is canceled, a
sound is activated to notify you that it
is canceled. If the instrument cluster's
visibility is reduced due to glare from
surrounding brightness, cancel the
illumination dimmer.
NOTE
When the illumination dimmer is
canceled, the instrument cluster
cannot be dimmed even if the lights
are turned on.
When the illumination dimmer is
canceled, the screen in the center
display switches to constant display
of the daytime screen.
When Driving
Instrument Cluster and Display
4-24
CX-50_8KB8-EA-22A_Edition2_new 2022-1-6 14:55:18

▼Outside Temperature Display
When the ignition is switched ON, the
outside temperature is displayed.

NOTE
Under the following conditions, the
outside temperature display may
differ from the actual outside
temperature depending on the
surroundings and ve
hicle conditions:
Significantly cold or hot
temperatures.
Sudden changes in outside
temperature.
The vehicle is parked.The vehicle is driven at low speeds.
Changing the Temperature Unit of the
Outside Temperature Display
The outside temperature unit can be
switched between Celsius and
Fahrenheit.
Settings can be changed by operating
the center display screen.
Refer to the Settings section in the
Mazda Connect Owner's Manual.
▼ Distance-to-empty
This displays the approximate distance
you can travel on the remaining fuel
based on the fuel economy.
The distance-to-empty will be
calculated and displayed every second.
When the remaining
distance-to-empty is 50 km (30 miles)
or farther, the remaining
distance-to-empty indication
decreases in 10 km (10 mile)
increments, and when the remaining
distance-to-empty is 50 km (30 miles)
or shorter, it decreases in 1 km (1 mile)
increments.

NOTE
Even though the distance-to-empty
display may indicate a
sufficient
amount of remaining driving distance
before refueling is required, refuel as
soon as possible if the fuel level is
very low or the low fuel warning light
illuminates.
The display will not change unless
you add more than approximately 9
L (2.3 US gal, 1.9 Imp gal) of fuel.
The distance-to-empty is the
approximate remaining distance the
vehicle can be driven until all the
graduation marks in the fuel gauge
indicating the remaining fuel supply
disappear.
If there is no past fuel economy
information such as after first
purchasing your vehicle or the
information is deleted when the
battery cables are disconnected, the
actual distance-to empty/range may differ from the amount indicated.
When Driving
Instrument Cluster and Display
4-25
CX-50_8KB8-EA-22A_Edition2_new 2022-1-6 14:55:18