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
CHU0212S004