Mazda X-5. Manual — part 48

WHEEL AND TIRES

02–12–5

02–12

TIRE PRESSURE MONITORING SYSTEM (TPMS) WIRING DIAGRAM

E5U021237020N03

With advanced keyless system or keyless entry system

Without advanced keyless system and keyless entry system

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NO.1

ANTENNA

NO.2

NO.3

NO.4

RF SIGNAL

CAN
DRIVER

CAN_H

CAN_L

PCM

WHEEL UNIT

E

C

A

KEYLESS
RECEIVER

KEYLESS CM

INSTRUMENT
CLUSTER

3R

2V

1J

1L

1A

3C

DLC-2

3S

3U

E5U202ZW5001

NO.1

ANTENNA

NO.2

NO.3

NO.4

RF SIGNAL

CAN
DRIVER

CAN_H

CAN_L

PCM

WHEEL UNIT

E

D

B

A

INSTRUMENT
CLUSTER

2V

1J

1L

1A

DLC-2

KEYLESS
RECEIVER

E5U202ZW5002

WHEEL AND TIRES

02–12–6

TIRE PRESSURE MONITORING SYSTEM (TPMS) CONSTRUCTION/OPERATION

E5U021237020N04

Construction

• The TPMS consists of wheel units that detect air pressure, temperature and acceleration of each tire, and a

TPMS control module that receives data (RF signals) sent from the wheel units to monitor the air pressure of
each tire.

RF SIGNAL

KEYLESS
RECEIVER

KEYLESS CM

WHEEL UNIT

WITH ADVANCED KEYLESS SYSTEM
OR KEYLESS ENTRY SYSTEM

WITHOUT ADVANCED KEYLESS SYSTEM
AND KEYLESS ENTRY SYSTEM

TPMS
WARNING BUZZER
OR FLAT TIRE
WARNING LIGHT*

FLAT TIRE
WARNING LIGHT*

TPMS WARNING
LIGHT

*: VEHICLE EQUIPPED
WITH RUN-FLAT TIRE

E5U212ZS5004

WHEEL AND TIRES

02–12–7

02–12

Operation

• The wheel unit installed to each wheel sends data on air pressure, temperature and acceleration of each tire by

means of RF signals. The keyless receiver receives these signals with a built-in antenna.

• For vehicles with the advanced keyless system or keyless entry system, signals received by the keyless

receiver are transmitted tot he instrument cluster via the keyless CM.

• For vehicle without the advanced keyless system or keyless entry system, signals are transmitted from the

keyless receiver to the instrument cluster directly.

• The instrument cluster monitors the air pressure of each tire based on the tire data sent from each wheel unit.

If the instrument cluster detects an excessive drop in air pressure or flat tire, the instrument cluster illuminates
the TPMS warning light or flat tire warning light and sounds the TPMS warning buzzer or flat tire warning
buzzer to alert the driver.

Component Parts/Function

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Part name

Function

Wheel unit

• Monitors air pressure, temperature, and acceleration of each tire, and sends

RF signals.

• Sends data if any abnormality is detected in the wheel unit.

Keyless receiver

• Receives from the keyless receiver.

• With advanced keyless system or keyless entry system: Send the RF signals

received from the wheel unit to the keyless CM.

• Without advanced keyless system or keyless entry system: Send the RF

signals received from the wheel unit to the instrument cluster.

Keyless CM (with advanced keyless
system or keyless entry system)

• Receives data from the keyless receiver.

• Sends data to the instrument cluster.

PCM

Vehicle speed signal

• Inputs vehicle speed signals to the instrument cluster via CAN communication.

Instrument
cluster

• Receives data from keyless CM (with advanced keyless system or keyless

entry system) or keyless receiver (without advanced keyless system or keyless
entry system) and monitor the air pressure of each wheel. If it determines from
those signals that tire pressure is abnormal, it controls the TPMS warning light,
flat tire warning light, TPMS warning buzzer and flat tire warning buzzer to alert
the driver.

TPMS warning light

• If the instrument cluster detects abnormal air pressure or any abnormality in

the system, the light is illuminated to alert the driver.

Flat tire warning light

• If the instrument cluster detects flat tire, the light is illuminated to alert the

driver.

TPMS warning buzzer

• If the instrument cluster detects abnormal air pressure any abnormality in the

system, the buzzer is sounded to alert the driver.

Flat tire warning buzzer

• If the instrument cluster detects flat tire, the buzzer is sounded to alert the

driver.

WHEEL AND TIRES

02–12–8

WHEEL UNIT CONSTRUCTION/OPERATION

E5U021237140N01

Construction

• The wheel unit is installed to the rim of each wheel with a nut. It monitors air pressure, temperature and

acceleration of the tire, and sends the data as RF signals.

• The wheel unit also serves as a tire valve.

Operation

• The wheel unit operates on a built-in battery, and regularly sends tire data as RF signals. The data it sends is

retrieved using a sensing function that monitors tire pressure and temperature, and a self-diagnostic function
that detects battery status and sensor malfunction.

• To maximize the life of the built-in battery, the unit uses the detected air pressure and acceleration to determine

vehicle conditions such as driving and long stops, and operates in a mode appropriate to vehicle conditions so
that battery consumption is minimized.

• Each wheel unit has its own identification code that is sent together with tire data and is used to verify which tire

has abnormal tire pressure. Therefore, when the wheel unit or the instrument cluster is replaced, the
identification codes must be configured.

Sensing Function

• The sensing function periodically monitors the following data and sends it to the keyless receiver.

— Tire pressure

— Tire temperature

— Tire acceleration

— Voltage of the built-in battery

• Intervals of tire data monitoring and data transmission to the keyless receiver differ depending on the

operational mode (varies according to vehicle conditions).

Self-diagnostic Function

• The self-diagnostic function continuously performs malfunction diagnosis for each sensing function item. If any

abnormality is found by the malfunction diagnosis, the data is sent to the keyless receiver.

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TIRE PRESSURE MONITORING SYSTEM (TPMS) OPERATION

E5U021267502N01

• The instrument cluster monitors the tire pressure of each tire and the wheel units for abnormalities using the

received data. If any abnormality is found, it controls TPMS warning light, TPMS warning buzzer, flat tire
warning light and flat tire warning buzzer to alert and notify the driver.

• The instrument cluster controls the following functions based on the received data:

Function list

WHEEL UNIT

E5U212ZW5005

Identification code recognition function

• Recognizes whether received signals are from own wheel units.

Tire pressure determination/warning
function

• Compares received tire pressure data with preset values. If the pressure is

determined to be too low or to have flat tire, the instrument cluster alerts the
driver via the TPMS warning light and buzzer or flat tire warning light and
buzzer.