sensor MAZDA MODEL CX-9 2019 (in English) Repair Manual

Tire Pressure Monitoring System*
The Tire Pressure Monitoring System (TPMS) monitors the pressure for each tire.
If tire pressure is to o low in one or more tires, the system will inform the driver via the
warning light in the instrument cluster and by the warning beep sound.
Refer to Contact Authorized Mazda Dealer and Have Vehicle Inspected on page 7-31.
Refer to Taking Action on page 7-37.
Refer to Tire Inflation Pressu re Warning Beep on page 7-49.

The tire pressure sensors installed on each wheel send tire pre ssure data by radio signal to
the receiver unit in the vehicle.
Tire pressure sensors
NOTE
When the ambient temperature is low due to seasonal changes, tire temperatures are also
lower. When the tire temperature decreases, the air pressure decreases as well. The TPMS
warning light may illumina te more frequently. Visually inspect the tires daily before driving,
and check tire pressures monthly with a tire pressure gauge. When checking tire pressures,
use of a digital tire pressure gauge is recommended.

TPMS does not alleviate your need to check the pressure and con dition of all four tires
regularly.
CAUTION
 Each tire, including the spare (if provided), should be checked monthly when cold and
inflated to the inflation pressure recommended by the vehicle manufacturer on the vehicle
placard or tire inflation pressure label. (If your vehicle has tires of a different size than the
size indicated on the vehicle placard or tire in flation pressure label, you should determine
the proper tire inflation pressure for those tires.)
When Driving
Tire Pressure Monitoring System
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As an added safety feature, your vehicle has been equipped with a tire pressure monitoring
system (TPMS) that illuminates a low tire pre ssure telltale when one or more of your tires is
significantly under-inflated. Accordingly, when th e low tire pressure telltale illuminates, you
should stop and check your tires as soon as possible, and inflate them to the proper
pressure. Driving on a significantly under-in flated tire causes the tire to overheat and can
lead to tire failure. Under-inflation also reduce s fuel efficiency and tire tread life, and may
affect the vehicle's handling and stopping ability.
Please note that the TPMS is not a substitute for proper tire maintenance, and it is the
driver's responsibility to maintain correct ti re pressure, even if under-inflation has not
reached the level to trigger illumination of the TPMS low tire pressure telltale.
Your vehicle has also been equipped with a TPMS malfunction indicator to indicate when
the system is not operating properly.
The TPMS malfunction indicator is combined with the low tire pressure telltale. When the
system detects a malfunction, the telltale wi ll flash for approximately one minute and then
remain continuously illuminated. This sequence will continue upon subsequent vehicle
start-ups as long as the malfunction exists. When the malfunction indicator is illuminated,
the system may not be able to detect or signal low tire pressure as intended. TPMS
malfunctions may occur for a variety of reasons, including the installation of replacement
or alternate tires or wheels on the vehicle th at prevent the TPMS from functioning properly.
Always check the TPMS malfunction telltale after replacing one or more tires or wheels on
your vehicle to ensure that the replacement or alternate tires and wheels allow the TPMS to
continue to function properly.
 To avoid false readings, the system samples for a little while before indicating a problem. As
a result it will not instantaneously regi ster a rapid tire deflation or blow out.
▼System Error Activation
When the warning light flashes, there may
be a system malfunction. Consult an
Authorized Mazda Dealer.
A system error activation may occur in the
following cases:
When there is equipment or a device
near the vehicle using the same radio
frequency as that of the tire pressure
sensors.
When a metallic device such as a
non-genuine navigation system is
equipped near the center of the
dashboard, which may block radio
signals from the tire
pressure sensor to
the receiver unit.
When using the following devices in the
vehicle that may cause radio
interference with the receiver unit.
A digital device such as a personal
computer.
A current converter device such as a
DC-AC converter.
When excess snow or ice adheres to the
vehicle, especially around the wheels.
When the tire pressu re sensor batteries
are exhausted.
When using a wheel with no tire
pressure sensor installed.
When using tires with steel wire
reinforcement in the sidewalls.
When using tire chains.
When Driving
Tire Pressure Monitoring System
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▼Tires and Wheels
CAUTION
When inspecting or adjusting the tire air
pressures, do not apply excessive force to
the stem part of the wheel unit. The stem
part could be damaged.
Changing tires and wheels
The following procedure allows the TPMS
to recognize a tire pressure sensor's unique
ID signal code whenever tires or wheels
are changed, such as changing to and from
winter tires.
NOTE
Each tire pressure sensor has a unique ID
signal code. The signal code must be
registered with the TPMS before it can
work. The easiest way to do it is to have
an Authorized Mazda Dealer change your
tire and complete ID signal code
registration.
When having tires changed at an
Authorized Mazda Dealer
When an Authorized Mazda Dealer
changes your vehicle's tires, they will
complete the tire pressure sensor ID signal
code registration.

When changing tires yourself
If you or someone else changes tires, you
or someone else can also undertake the
steps for the TPMS t
o complete the ID
signal code registration.
1. After tires have been changed, switch the ignition ON, then back to ACC or
OFF.
2. Wait for about 15 minutes.
3. After about 15 minutes, drive the vehicle at a speed of at least 25 km/h
(16 mph) for 10 minutes and the tire
pressure sensor ID s ignal code will be
registered automatically.
NOTE
If the vehicle is driven within about 15
minutes of changing tires, the tire pressure
monitoring system warn ing light will flash
because the sensor ID signal code would
not have been registered. If this happens,
park the vehicle for about 15 minutes,
after which the sensor ID signal code will
register upon driving the vehicle for 10
minutes.
Replacing tires and wheels
CAUTION
 When replacing/repairing the tires or
wheels or both, have the work done by
an Authorized Mazda Dealer, or the tire
pressure sensors may be damaged.
 The wheels equipped on your Mazda are
specially designed for installation of the
tire pressure sensors. Do not use
non-genuine wheels, otherwise it may
not be possible to inst all the tire pressure
sensors.
Be sure to have the tire pressure sensors
installed whenever tires or wheels are
replaced.
When having a tire or wheel or both
replaced, the follow ing types of tire
pressure sensor installations are possible.
The tire pressure sensor is removed
from the old wheel and installed to the
new one.
When Driving
Tire Pressure Monitoring System
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The same tire pressure sensor is used
with the same wheel. Only the tire is
replaced.
A new tire pressure sensor is installed to
a new wheel.
NOTE
The tire pressure sensor ID signal code
must be registered when a new tire
pressure sensor is purchased. For
purchase of a tire pressure sensor and
registration of the tire pressure sensor
ID signal code, consult an Authorized
Mazda Dealer.
When reinstalling a previously removed
tire pressure sensor to a wheel, replace
the grommet (seal between valve body/
sensor and wheel) for the tire pressure
sensor.
When Driving
Tire Pressure Monitoring System
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▼Displayable Range on the Screen
The images on the screen may be different from the actual condi
tions.

(Screen display) Garnish
Bumper
(Actual view)
Object
Obstruction detection
indication in parking
sensor system
Some models
NOTE
The displayable range varies depending on the vehicle and road conditions.
The displayable range is limited. Objects under the bumper or around the bumper ends
cannot be displayed.
The distance appearing in the displayed image is different from the actual distance
because the rear view parking camera is equipped with a specific lens.
Some optionally installed vehicle accessories may be picked up by the camera. Do not
install any optional part s that can interfere with the camera view, such as illuminating
parts or parts made of reflective material.
It may be difficult to see the display under the following conditions, however, it does not
indicate a malfunction.
In darkened areas.
When the temperature around the lens is high/low.
When the camera is wet such as on a rainy day or during periods of high humidity.
When foreign material such as mud is stuck around the camera.
When the camera lens reflects sunlight or headlight beams.
Image display may be delayed if the temperature around the camera is low.
When Driving
Rear View Monitor
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Parking Sensor System*
The parking sensors use ultrasonic sensors which detect obstructions around the vehicle
when the vehicle is driven at lo w speeds, such as during garage or parallel parking, and a
buzzer sound and detection indicator notify the driver of the a pproximate distance from the
vehicle to the surrounding obstruction.

Rear corner sensor
Front corner sensor
Rear sensor
Front sensorSome models.
WA R N I N G
Do not rely completely on the parking sensor system and be sure to confirm the safety around
your vehicle visually when driving:
This system can assist the driver in opera ting the vehicle in the forward and backward
directions while parking. The detection ranges of the sensors are limited, therefore, driving the
vehicle while relying only on the system may cause an accident. Always confirm the safety
around your vehicle visually when driving.
NOTE
Do not install any accessories within the detection ranges of the sensors. It may affect the
system operation.
Depending on the type of obstruction and th e surrounding conditions, the detection range
of a sensor may narrow, or the sensors may not be able to detect obstructions.
The system may not operate norma lly under the following conditions:
Mud, ice, or snow is adhering to the sensor area (Returns to normal operation when
removed).
The sensor area is frozen (Returns to normal operation when the ice is thawed).
The sensor is covered by a hand.
The sensor is excessively shocked.
The vehicle is excessively tilted.
Under extremely hot or cold weather conditions.
When Driving
Parking Sensor System
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The vehicle is driven on bumps, inclines, gravel, or grass covered roads.
Anything which generates ultrasound is near the vehicle, such as another vehicle's
horn, the engine sound of a motorcycle, the air brake sound of a large-sized vehicle, or
another vehicle's sensors.
The vehicle is driven in heavy rain or in road conditions causing water-splash.
A commercially-available fender pole or an antenna for a radio transmitter is installed
to the vehicle.
The vehicle is moving towards a tall or square curbstone.
An obstruction is too close to the sensor.
Obstructions under the bumper may not be detected. Obstructions that are lower than the
bumper or thin which may have been initially detected may no longer be detected as the
vehicle approaches more closely to the obstruction.
The following types of obstructions may not be detected:
Thin objects such as wire or rope
Things which absorb sonic waves easily such as cotton or snow
Angular shaped objects
Very tall objects, and those which are wide at the top
Small, short objects
Always have the system inspected at an Authorized Mazda Dealer if any shock is applied
to the bumpers, even in a minor accident. If the sensors are deviated, they cannot detect
obstructions.
(With front sensor and front corner sensor)
The system may have a malfunction if the beep does not operate or the indicator light
does not illuminate when the park assist sensors switch is turned on. Consult an
Authorized Mazda Dealer.
(Without front sensor an d front corner sensor)
The system may have a malfunction if the be ep does not operate. Consult an Authorized
Mazda Dealer.
(With front sensor and front corner sensor)
The system may have a malfunction if the beep sound which indicates a system
malfunction is heard and the i ndicator light flashes. Consult an Authorized Mazda Dealer.
The beeper which indicates a system malf unction may not be heard if the ambient
temperature is extremely cold, or mud, ice, or snow adheres to the sensor area. Remove
any foreign material from the sensor area.
When installing a trailer hitch, consult an Authorized Mazda Dealer.
When Driving
Parking Sensor System
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▼Sensor Detection Range
The sensors detect obstruction
s within the following range.

Front sensor detection range
Front corner sensor detection range Rear sensor detection range
Rear corner sensor detection range
B
A
D
C A: About 55 cm (About 21.7 in)
B: About 55 cm (About 21.7 in)
C: About 100 cm (About 39.3 in)
D: About 150 cm (About 59.0 in)
Viewing distance display
Display
Distance between vehicle and obstruction
Without 360° view monitor With 360° viewmonitor Front Sensor
*/Front
Corner Sensor*Rear Sensor/Rear Corner Sensor
Without front sen‐
sor and front cor‐ ner sensor With front sensor
and front corner sensor
Green
Front sensor:
Approx. 100―60 cm (39.3―23.6 in) Rear sensor:
Approx. 150―60 cm (59.0―23.6 in)
When Driving
Parking Sensor System
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DisplayDistance between vehicle and obstruction
Without 360° view monitor With 360° viewmonitor Front Sensor
*/Front
Corner Sensor*Rear Sensor/Rear Corner Sensor
Without front sen‐
sor and front cor‐ ner sensor With front sensor
and front corner sensor
Ye l l o w
Front sensor:
Approx. 60―45 cm (23.6―17.7 in)
Front corner sensor: Approx. 55―38 cm (21.7―15.0 in) Rear sensor:
Approx. 60―45 cm (23.6―17.7 in)
Rear corner sensor:
Approx. 55―38 cm (21.7―15.0 in)
Amber
Front sensor:
Approx. 45―35 cm (17.7―13.7 in)
Front corner sensor: Approx. 38―25 cm (15.0―9.8 in) Rear sensor:
Approx. 45―35 cm (17.7―13.7 in)
Rear corner sensor:
Approx. 38―25 cm (15.0―9.8 in)
Red
Front sensor:
Within approx. 35 cm (13.7 in)
Front corner sensor:
Within approx. 25 cm (9.8 in) Rear sensor:
Within approx. 35 cm (13.7 in)
Rear corner sensor:
Within approx. 25 cm (9.8 in)
When Driving
Parking Sensor System
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▼Park Assist Sensor System Operation
With front sensor and front corner sensor
The switch can be activated when the ignition is switched ON, t
he selector lever is in any
position except reverse (R), and the vehicle speed is about 10 km/h (6 mph) or less.
When the parking sensor switch is pressed, a beep sound is hear d, the obstruction detection
indication is displayed in the a udio screen, and the indicator light in the switch illuminates.

Indicator light
NOTE
If the system is cancelled, it will not restor e automatically even when the vehicle speed is
decreased to 10 km/h (6 mph) or less.
When the ignition is switched OFF, the syst em status before it was turned off is
maintained. For example, if th e ignition is switched OFF while the parking sensor is
activated, the system will be activated when the ignition is switched ON the next time.
Sensor detection condition
The system can be used when the ignition is switched ON and the Park Assist Sensor
Switch has been turned on.
The sensors detect obstructions under the following conditions:
Sensor Condition
Front Sensor The selector lever is in any pos
ition except reverse (R), and the vehicle speed is
about 10 km/h (6 mph) or less.
Front Corner Sensor The vehicle speed is about 10 km/h (6 mph) o r less.
Rear Sensor The selector lever is in reverse (R).
Rear Corner Sensor The selector lever is in reverse
(R), and the vehicle speed is about 10 km/h (6 mph)
or less.
The system is cancelled under the following conditions:
The parking sensor switch is pressed while the parking sensor i s in operation.
When Driving
Parking Sensor System
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