2023 MAZDA MODEL CX-50 ECU

NOTE
The keys carry a unique electronic
code. For this reason, and to assure
your safety, obtaining a replacement
key requires security validation, this
will add some delays in supplying a
replacement key. They are only
available through an Authorized
Mazda Dealer.
Always keep a spare key in case one
is lost. If a key is lost, consult an
Authorized Mazda Dealer as soon as
possible.
If you lose a key, an Authorized
Mazda Dealer will reset the
electronic codes of your remaining
keys and immobilizer system. Bring
all the remaining keys to an
Authorized Mazda Dealer to reset.
Starting the vehicle with a key that
has not been reset is not possible.
▼Operation
NOTE
The engine may not start and security
indicator light may illuminate or flash
if the key is placed in an area where
it is difficult for the system to detect
the signal, such as on the dashboard
or in the glove compartment. Move
the key to a location within the signal
range, switch the ignition
off, and
then restart the engine.
Signals from a TV or radio station, or
from a transceiver or mobile
telephone could interfere with your
immobilizer system. If you are using
the proper key and the engine fails to
start, check the security indicator
light.
Arming
The system is armed when the ignition
is switched from ON to off.
The security indicator light in the
instrument cluster flashes every 2
seconds until the system is disarmed.

Disarming
The system is disarmed when the
ignition is switched ON with the
correct programmed key. The security
indicator light illu minates for about 3
seconds and then turns off.
If the engine does not start with the
correct key, and the security indicator
light remains illuminated or flashing,
try the following:
Make sure the key is within the
operational range for signal
transmission. Switch the ignition off,
and then restart the engine. If the
engine does not start after 3 or more
tries, contact an Authorized Mazda
Dealer.
Before Driving
Security System
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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 lights 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
panorama sunroof* 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.
NOTE
The theft-deterrent system can also
be armed by activating the auto
relock function with all the doors,
the liftgate and the hood closed.
Refer to Transmitter on page 3-5.
Before Driving
Security System
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The system will disarm if one of the
following operations takes place
within 20 seconds after pressing the
lock button:
Unlocking any door.Opening any door.Opening the hood.Switching the ignition ON.
To rearm the system, do the arming
procedure again.
When the doors are locked by
pressing the lock button on the
transmitter while the theft-deterrent
system is armed, the hazard warning
lights will flash once to indicate that
the system is armed.
▼ To Tu r n
Off an Armed System
An armed system can be turned off
using any one of the following
methods:
Pressing the unlock button on the
transmitter.
Starting the engine with the push
button start.
(With the advanced keyless
function)
Touching the sensing area of the
door release touch sensor.
The hazard warning lights will flash
twice.
NOTE
When the doors are unlocked by
pressing the unlock button on the
transmitter while the theft-deterrent
system is turned off, the hazard
warning lights will flash twice to
indicate that the system is turned off.
▼ To S t o p t h e A l a r m
A triggered alarm can be turned off
using any one of the following
methods:
Pressing the unlock button on the
transmitter.
Starting the engine with the push
button start.
(With the advanced keyless
function)
Touching the sensing area of the
door release touch sensor.
Pressing the electric liftgate opener
while the key is being carried.
The hazard warning lights will flash
twice.
Before Driving
Security System
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Avoid sudden braking and sudden
maneuvering.
Do not pump the brakes. Continue
to press down on the brake pedal.
Refer to Antilock Brake System (ABS)
on page 4-78.
If you get stuck, select a lower gear
and accelerate slowly. Do not spin
the front wheels.
For more traction in starting on
slippery surfaces such as ice or
packed snow, use sand, rock salt,
chains, carpeting, or other nonslip
material under the front wheels.
NOTE
Use snow chains only on the front
wheels.
Floor Mat
▼Floor Mat
We recommend the use of Genuine
Mazda
floor mats.
WARNING
Make sure the
floor mats are hooked
on the retention pins to prevent them
from bunching up under the foot
pedals:
Using a floor mat that is not secured is
dangerous as it will interfere with the
accelerator and brake pedal operation,
which could result in an accident.
Do not install two floor mats, one on
top of the other, on the driver's side:
Installing two floor mats, one on top of
the other, on the driver's side is
dangerous as the retention pins can
only keep one floor mat from sliding
forward.
Loose floor mat(s) will interfere with
the foot pedals and could result in an
accident.
If using an all-weather mat for winter
use always remove the original floor
mat.
When setting a floor mat, position the
floor mat so that its grommets are
inserted over the pointed end of the
retention posts.
Before Driving
Driving Tips
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Drive slowly. Braking performance
can be adversely affected if snow or
ice adheres to the brake
components. If this situation occurs,
drive the vehicle slowly, releasing the
accelerator pedal and lightly applying
the brakes several times until the
brake performance returns to
normal.
▼ Snow Tires
Use snow tires on all 4 wheels
Do not go faster than 120 km/h (75
mph) while driving with snow tires.
Inflate
snow tires 30 kPa (0.3 kgf/cm
2,
4.3 psi) more than recommended on
the tire pressure label (driver's door
frame), but never more than the
maximum cold-tire pressure shown on
the tires.

The vehicle is orig inally equipped with
all season radials designed to be used
all year around. In some extreme
climates you may find it necessary to
replace them with snow tires during
the winter months to further improve
traction on snow and ice covered
roads.
WARNING
Use only the same size and type tires
(snow, radial, or non-radial) on all 4
wheels:
Using tires different in size or type is
dangerous. Your vehicle's handling
could be greatly affected and result in
an accident.
CAUTION
Check local regulations before using
studded tires.
NOTE
The tire pressure monitoring system
may not function correctly when using
tires with steel wire reinforcement in
the sidewalls (page 4-203).
▼ Tire Chains
Check local regulations before using
tire chains.
CAUTION

Chains may affect handling.
 Do not go faster than 50 km/h (30
mph) or the chain manufacturer's
recommended limit, whichever is
lower.
 Drive carefully and avoid bumps,
holes, and sharp turns.
 Avoid locked-wheel braking.
 Do not use chains on a temporary
spare tire; it may result in damage to
the vehicle and to the tire.
 Do not use chains on roads that are
free of snow or ice. The tires and
chains could be damaged.
 Chains may scratch or chip
aluminum wheels.
NOTE
The tire pressure monitoring system
may not function correctly when
using tire chains.
Install the chains on the front tires only.
Do not use chains on the rear tires.
Please consult an Authorized Mazda
Dealer.
Installing the chains
1. Secure the chains on the front tires as tightly as possible.
Always follow the chain
manufacturer's instructions.
2. Retighten the chains after driving 1/2 ―1 km (1/4 ―1/2 mile).
Before Driving
Driving Tips
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▼Tra i l e r H i tc h
Use only a hitch ball recommended by the trailer manufacturer that conforms to the
gross trailer weight requirement.
When not towing a trailer, remove the trailer hitch (if detachable) to reduce the
possibility of damage as a result of the vehicle being rear-ended.
WARNING
Always make sure the trailer hitch is securely attached before departure:
An unsecured trailer hitch is dangerous as it causes greater trailer sway from
crosswinds, rough roads or other causes, resulting in loss of control and a serious
accident.
Examine all trailer-hitch mounting bolts regularly and tighten any that are loose. If
the hitch is removed, seal any open mounting holes to prevent exhaust, dust, water,
dirt and other foreign elements from fil
tering in, possibly endangering personal
safety and damaging your vehicle.
Do not install a hitch that stiffens the bumper as it will reduce the bumper's
performance.
Make sure there are no exhaust gas leaks into the passenger compartment if any
mounting bolts are connected to the body:
Modifying your vehicle exhaust system is dangerous. Exhaust gas entering the vehicle
could cause loss of consciousness or even death.
When mounting the trailer hitch, make no modifications to the vehicle exhaust
system.
CAUTION
 Make all hitch adjustments with actual loads. Do not load and unload vehicle
while adjusting hitch. This action will change the vehicle height.
 Do not use an axle-mounted hitch. This may damage the axle and related parts.
▼ Tires
When towing a trailer, make sure all tires are inflated to the recommended cold-tire
pressure, as indicated on the tire pressure
chart on the driver's door frame. Trailer
tire size, load rating, and inflation pressures should conform to tire manufacturer
specifications.
WARNING
Never use the temporary spare tire when towing:
Using the temporary spare tire on your vehicle when towing a trailer is dangerous as
it could result in tire failure, loss of control, and injury to vehicle occupants.
Before Driving
To w i n g
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▼Safety Chains
Safety chains must be used as a precautionary measure should the trailer become
unintentionally unhitched. They should cross under the trailer tongue and attach to
the hitch. Leave enough slack to allow full
turns. Consult literature published by your
trailer or hitch manufacturer for more details.
WARNING
Make sure the safety chain is securely attached to both the trailer and the vehicle
prior to departure:
Towing a trailer without using a safety chain securely attached to both the trailer and
the vehicle is dangerous. If damage occurs to the coupling unit or hitch ball, the
trailer could wander into another lane and cause a collision.
▼ Tra i l e r L i g h t s
Trailer lights must comply with all federal, state, and local regulations. Equip your
trailer as required before towing it day or night.
CAUTION
Do not connect a trailer lighting system dire
ctly to the lighting system of your Mazda.
This may damage your vehicle's electrical system and lighting systems. Have a
recreational vehicle dealer or trailer rental agency connect the system, and inspect
the brake lights and turn signals yourself before each trip.
▼ Tra i l e r B ra ke s
If the total trailer weight exceeds 450 kg (1,000 lb), trailer brakes are required. If
your trailer has brakes, make sure they comply with all federal, state, and local
regulations.
WARNING
Do not connect a hydraulic trailer-brake system to your vehicle's brake system:
Connecting a hydraulic trailer-brake system directly to the vehicle brake system is
dangerous and will result in inadequate braking and possible injury.
Before Driving
Towing
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▼Trailer Towing Tips
Verify that your Mazda maintains a near-normal attitude when a loaded or
unloaded trailer is connected. Do not drive if it has an abnormal front-up or
front-down position. Inspect for incorrec
t tongue load, worn suspension parts,
and trailer overloading.
Make sure the trailer is properly loaded and the cargo is secure to prevent it from
shifting.
Make sure the mirrors conform to all govern ment regulations. If they do not, install
required rear view mirrors appropriate for towing purposes.
The three main causes of vehicle-trailer accidents are driver error, excessive speed,
and improper trailer loading.
Before driving
Have your cooling and braking system checked by an Authorized Mazda Dealer.Before starting out, inspect the operation of all vehicle and trailer lights and all
vehicle-to-trailer connections. Stop and re-inspect all lights and connections after
driving a short distance.
Driving
Your Mazda will handle differently with a trailer in tow, so practice turning,
backing, and stopping in a traffic-free area.
Take time to get accustomed to the extra weight and length.Allow more room between your vehicle and the one in front because braking
distance increases with a trailer. For each 16 km/h (10 mph) of speed, allow at
least one vehicle and trailer length between your Mazda and the vehicle ahead.
Avoid jerky starts or sudden acceleration.Avoid sudden braking. It may cause loss of control and result in jackknifing ,
especially so on wet or slippery roads.
Shift the selector lever to the D position when towing a trailer in hilly terrain or
when heavily loaded.
The D position will allow operating the vehicle without frequent shifting.
Lane changes and turning
Avoid quick lane changes, su dden turns, and tight turns. Slow down before turning
to avoid the need of sudden braking.
A turning trailer will make a tighter arc than the tow vehicle. Compensate with turns
that are larger than normal.
Pa s s i n g
Plan well ahead to pass other vehicles, and provide plenty of room before changing
lanes. Crosswinds from passing vehicles, especially larger ones, and the effects of
rough roads will affect handling.
If swaying occurs, firmly grip the steering wheel and reduce speed immediately, but
gradually.
Before Driving
To w i n g
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