ECU MAZDA MODEL CX-9 2019 (in English) Service Manual

WA R N I N G
Always keep tow loads within specified limits as indicated in the Trailer Towing-Load Table:
Attempting to tow loads greater than those specified is dangerous as it may cause serious
handling and performance problems that could result in personal injury or vehicle damage,
or both.
Load your trailer with the weight about 60 % toward the front and 40 % toward the rear:
Loading the trailer with more weight in the rear than in the front is dangerous. Doing so could
cause you to lose control. The trailer tongue load must be 10 % ―15 % of the total trailer load
(sum of the weights of the trailer and cargo).
Always have the total trailer weight and tongue load determined prior to departure:
Attempting to tow loads withou t determining the total trailer weight and tongue load is
dangerous. Trailer sway from crosswinds, roug h roads or other causes could result in loss of
control and a serious accident.
CAUTION
The total trailer weight and tongue load ca n be determined by weighing the trailer on
platform scales at a highway weight station or a trucking company.
▼ Trailer Hitch
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.
WA R N I N G
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 filtering in, possibly en dangering personal safety and damaging your
vehicle.
Do not install a hitch that stiffens the bumper as it will reduce the bumper's performance.
Before Driving
To w i n g
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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 wi ll 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 ti re pressure chart on the driver's door frame. Trailer tire size,
load rating, and inflation pressures should conform to tire man ufacturer specifications.
WA R N I N G
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.
▼ Safety Chains
Safety chains must be used as a precautionary measure should th
e 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 publ ished by your trailer or hitch
manufacturer for more details.
WA R N I N G
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.
▼ Trailer Lights
Trailer lights must comply with
all federal, state, and local regulations. Equip your trailer as
required before towing it day or night.
Before Driving
To w i n g
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CAUTION
Do not connect a trailer lighting system directly to the lighting system of your Mazda. This
may damage your vehicle's electrical system an d 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.
▼ Trailer Brakes
If the total trailer weight exc
eeds 450 kg (1,000 lb), trailer brakes are required. If your trailer
has brakes, make sure they compl y with all federal, state, and local regulations.
WA R N I N G
Do not connect a hydraulic trailer-brake system to your vehicle's brake system:
Connecting a hydraulic trailer-brake system direc tly to the vehicle brake system is dangerous
and will result in inadequate braking and possible injury.
▼ 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 abn ormal front-up or front-down position. Inspect
for incorrect tongue load, worn suspension parts, and trailer o verloading.
Make sure the trailer is properly loaded and the cargo is secur e to prevent it from shifting.
Make sure the mirrors conform to all government regulations. If they do not, install
required rear view mirrors appr opriate for towing purposes.
The three main causes of vehicle-trailer accidents are driver e rror, excessive speed, and
improper trailer loading.
Before driving
Have your cooling and braking system checked by an Authorized M azda Dealer.
Before starting out, inspect the operation of all vehicle and trailer lights and all
vehicle-to-trailer connections. S top and re-inspect all lights and connections after driving
a short distance.
Driving
Your Mazda will handle differe ntly 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 becau se braking distance
increases with a trailer. For eac h 16 km/h (10 mph) of speed, a llow at least one vehicle
and trailer length between your Mazda and the vehicle ahead.
Before Driving
To w i n g
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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.
Indicator light
NOTE
The engine starts by pressing the push
button start while depressing the brake
pedal. 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 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 push button start
indicator light (amber) also turns off.
WA R N I N G
Before leaving the driver's seat, always
switch the ignition off, set the parking
brake, and make sure the selector lever is in
P position:
Leaving the driver's seat without switching
the ignition off, setting the parking brake,
and shifting the selector lever to P position
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.
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 (page 4-11).
When Driving
Start/Stop Engine
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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
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
7-22).
▼Engine Start Fun
ction 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 th e engine has completely
started.
2. Make sure that the push button start indication light (green) flashes.
3. Touch the push button start using the backside of the key (as shown) while
the push button start indicator light
(green) flashes.

Transmitter
When Driving
Start/Stop Engine
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SignalWarning Page
(Red)
*Seat Belt Warning Light (Rear seat) 7-37
*Low Washer Fluid Level Warning Indication
7-37
Door-Ajar Warning Indication
7-37
Liftgate-Ajar Warning Indication 7-37
Door-Ajar Warning Light7-37
*1 The light turns on when the ignition is switched on for an operation check, and turns off a few seconds later or
when the engine is started. If t he light does not turn on or remains turned on, have the vehicle inspected at an
Authorized Mazda Dealer.
*2 The light turns on continuously when the parking brake is appl ied.
▼Indication/Indicator Lights
These lights turn on or flash to
notify the user of the system operation status or a system
malfunction.
Signal Indicator Page
(Green)
*Seat Belt Indicator Light (Rear seat) 2-32
Front Passenger Air Bag Deactivation Indicator Light*12-78
Security Indicator Light*13-44
Wrench Indication
4-27
Shift Position Indication4-61
Lights-On Indication/Indicator Light 4-68
When Driving
Instrument Cluster and Display
*Some models.4-25
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SignalWarning Page
Seat Belt Warning Light (Front seat) 7-37
*Seat Belt Warning Light (Rear seat)7-37
*Low Washer Fluid Level Warning Indication7-37
Door-Ajar Warning Indication
7-37
Liftgate-Ajar Warning Indication7-37
*1 The light turns on when the ignition is switched on for an operation check, and turns off a few seconds later or
when the engine is started. If t he light does not turn on or remains turned on, have the vehicle inspected at an
Authorized Mazda Dealer.
*2 The light turns on continuously when the parking brake is appl ied.
▼Indication/Indicator Lights
These lights turn on or flash to
notify the user of the system operation status or a system
malfunction.
Signal Indicator Page
(Green)
*Seat Belt Indicator Light (Rear seat) 2-32
*Front Passenger Air Bag Deactivation Indicator Light*12-78
Security Indicator Light*13-44
Wrench Indication
4-44
(Blue)Low Engine Coolant Temperature Indicator Light 4-44
When Driving
Instrument Cluster and Display
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SignalWarning Page
Check Engine Light*17-31
Automatic Transaxle Warning Light*17-31
Air Bag/Front Seat Belt Pretensioner System Warning Light*17-31
(Red)KEY Warning Light
*1
Turns on
7-31
Flashing 7-37
LED Headlight Warning Light*17-31
Low Fuel Warning Light 7-37
Check Fuel Cap Warning Light*17-37
Engine Oil Level Warning Light*17-37
Seat Belt Warning Light 7-37
Door-Ajar Warning Light7-37
*1 The light turns on when the ignition is switched on for an operation check, and turns off a few seconds later or
when the engine is started. If t he light does not turn on or remains turned on, have the vehicle inspected at an
Authorized Mazda Dealer.
*2 The light turns on continuously when the parking brake is appl ied.
▼Indication/Indicator Lights
These lights turn on or flash to
notify the user of the system operation status or a system
malfunction.
Signal Indicator Page
(Green)KEY Indicator Light 4-5
Security Indicator Light*13-44
Wrench Indicator Light*14-55
Shift Position Indication
4-61
When Driving
Instrument Cluster and Display
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▼Electric Parking Brake (EPB)
The EPB equipment applies the parking
brake using an electric motor. When the
parking brake is applied, the EPB switch
indicator light turns on.
Indicator light
WA R N I N G
Do not drive the vehicle with the parking
brake applied:
If the vehicle is driven with the parking
brake applied, the brake parts may
generate heat and the brake system may
not operate, leading to an accident.
Before driving, release the parking brake
and verify that the brake system warning
light is turned
off.
NOTE
The parking brake cannot be applied or
released while the vehicle battery is
dead.
If the EPB is repeatedly applied and
released it may stop operating to
prevent overheating of the motor. If this
occurs, wait approx. 1 minute before
operating the EPB switch again.
An operation sound occurs when
applying or releasing the parking brake,
however, this does not indicate a
malfunction.
If the EPB is not used for long periods,
an automatic inspection of the system is
performed while the vehicle is parked.
An operation sound can be heard,
however, this does not indicate a
problem.
When the parking brake is applied and
the ignition is switched OFF, an
operation sound can be heard, however,
this does not indicate a problem.
The brake pedal may move while the
parking brake is being applied or
released, however, this does not indicate
a problem.
If the EPB switch is continually pulled
while driving the vehicle, the parking
brake will be applied and the EPB
warning beep will be activated. When
the switch is released, the parking brake
is released and the beep stops.
If the parking brake is applied with the
ignition switched off or in ACC, the
brake system warning light in the
instrument cluster and the indicator
light in the switch may turn on for 15
seconds.
When running the vehicle through an
automatic car wash, it may be necessary
to switch the ignition off with the
parking brake released depending on
the type of auto matic car wash.
When applying the parking brake
The parking brake can be applied
regardless of the igni tion switch position.
Securely depress the brake pedal and pull
up the EPB switch.
When Driving
Brake
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When connecting a device to the
auxiliary jack or USB port, noise may
occur depending on the connected
device. If the device is connected to the
vehicle's accessory socket, the noise can
be reduced by unplugging it from the
accessory socket.
▼How to connect USB port/Auxiliary
jack

USB port
Auxiliary jack
Some models.
Connecting a device
1. Open the console lid.
2. Connect the connector on the device to the USB port.
Connecting with a connector cable
1. Open the console lid.
2. Connect the device plug/connector
cable to the auxiliary jack/USB port.
Pass the device plug/connector cable
through the notch in the console and
connect.
WA R N I N G
Do not allow the connection plug cord to
get tangled with the selector lever:
Allowing the plug cord to become tangled
with the selector lever is dangerous as it
could interfere with driving, resulting in an
accident.
CAUTION
Do not place objects or apply force to the
auxiliary jack/USB port with the plug
connected.
NOTE
Insert the plug into the auxiliary
jack/USB port securely.
Insert or pull out the plug with the plug
perpendicular to th e auxiliary jack/USB
port hole.
Insert or remove the plug by holding its
base.
(Vehicles with USB port indicated with
)
Use the USB terminal indicated by the
mark when using Apple CarPlay™
and Android Auto™.
Interior Features
Before Using the Audio System
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