Mazda X-5. Manual — part 49

WHEEL AND TIRES

02–12–9

02–12

Identification Code Recognition Function

• Since the identification codes of wheel units mounted on the vehicle have been configured in the instrument

cluster, the instrument cluster can verify the identification codes sent from the wheel units against the
configured identification codes.

• When the received identification code agrees with the configured identification code, data such as tire pressure

is updated according to the received signal. When the identification code does not agree, that signal data is
ignored.

Tire Pressure Determination And Warning Function

• The instrument cluster determines the tire pressure status of each wheel by comparing tire pressure data

received from the wheel units with the preset values in the instrument cluster.

• If a malfunction is detected in the received signals, the instrument cluster flashes the TPMS warning light to

notify the driver of a tire malfunction.

• The tire pressure monitoring function is classified into the two low-pressure and flat tire determinations.

• The informing/warning of an abnormal tire pressure determination takes precedence over the informing/

warning of a missing signal or malfunction determination.

Low-pressure determination

• When tire pressure data is lower than the detection value configured in the instrument cluster, the instrument

cluster determines that the tire for that wheel unit has low tire pressure.

— If low tire pressure is determined when the ignition is on, the TPMS warning light is illuminated and sounds

the TPMS warning buzzer for 3 s to alert the driver.

— If low tire pressure is determined when the ignition is off, the instrument cluster performs an open-circuit

check

*1

on the TPMS warning light and flat tire warning light after the ignition is turned on, and then

illuminates the TPMS warning light and flat tire warning light and sounds the TPMS warning buzzer and flat
tire warning buzzer for 3 s to alert the driver.

• The low-pressure determination is retained until tire pressure data from the applicable wheel unit returns to the

preset value.

— If tire pressure data that is higher than the specified value is received when the ignition is on, the TPMS

control module turns out the TPMS warning light.

— If tire pressure data that is higher than the specified value is received when the ignition is off, the module

performs an open-circuit check

*1

on the TPMS warning light after the ignition is turned on and turns out the

TPMS warning light.

*1

: The TPMS control modules turns on the TPMS warning light for 3 s after the ignition is turned on for an

open-circuit check of the TPMS warning light.

TPMS
WARNING
LIGHT

PRESET
AIR PRESSURE

SPECIFIED
AIR PRESSURE

LOW LIMIT
AIR PRESSURE

DETECTED
AIR PRESSURE

TPMS
WARNING
BUZZER

ON

ON

3 S

OFF

OFF

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WHEEL AND TIRES

02–12–10

Flat tire determination

• The instrument cluster determines that there is a flat tire when it receives a signal that the air pressure is lower

than the specified low-pressure value, and then it illuminates the flat tire warning light and sounds the flat tire
warning buzzer.

— The flat tire warning light turns off when the system detects that the flat tire has been repaired.

— When a flat tire is detected, the flat tire warning buzzer sounds every time the ignition switch is turned to the

ON position until recovery is detected.

— The system stores the most recent data when the power is cut (battery removal/installation) and holds this

data until the ignition switch is turned to the ON position next time.

— The system stores puncture and recovery freeze frame data.

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TIRE PRESSURE MONITORING SYSTEM (TPMS) WARNING LIGHT, TIRE PRESSURE MONITORING
SYSTEM (TPMS) WARNING BUZZER CONSTRUCTION

E5U021267502N03

• The TPMS warning light and the TPMS warning

buzzer are built into the instrument cluster.

• In the event of any abnormality in tire pressure or

in the system, signals illuminate the warning light
and sound the warning buzzer to alert the driver.

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LOW-PRESSURE AND
FLAT TIRE RECOVERY
DETERMINATION VALUE

LOW-PRESSURE
DETERMINATION VALUE

FLAT TIRE
DETERMINATION VALUE

ON

OFF

ON

OFF

ON

OFF

ON

OFF

TPMS WARNING LIGHT

FLAT TIRE
WARNING LIGHT

FLAT TIRE
WARNING BUZZER

TPMS WARNING BUZZER

DETECTED AIR
PRESSURE

3 S

30 S

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TPMS WARNING LIGHT

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WHEEL AND TIRES

02–12–11

02–12

FLAT TIRE WARNING LIGHT, FLAT TIRE WARNING BUZZER CONSTRUCTION

E5U021267502N04

• The flat tire warning light and the flat tire warning

buzzer are built into the instrument cluster.

• If the tire pressure decreases to the level that a

flat tire is detected, the flat tire warning light
illuminates and the flat tire warning buzzer
sounds to inform the driver of a puncture.

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CONTROLLER AREA NETWORK (CAN) OUTLINE

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• The TPMS control module receives information using the CAN system. See Section 09 for detailed information

regarding the CAN system.

Received Information from PCM

• Vehicle speed

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FLAT TIRE WARNING LIGHT

E5U212ZW5006