Mazda RX-8 2004 Service Highlights page 187

Low-pressure determination
• When tire pressure data sent from a wheel unit is lower than the detection value configured in the TPMS
control module, the module 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 control module illuminates the TPMS
warning light built into the instrument cluster 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 module performs an open-circuit check
the TPMS warning light after the ignition is turned on, and then illuminates the TPMS warning light and
sounds the TPMS 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
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.
SPECIFIED
AIR PRESSURE
PRESET
AIR PRESSURE
LOW LIMIT
AIR PRESSURE
TPMS
WARNING
LIGHT
TPMS
WARNING
BUZZER
02–12–8
WHEEL AND TIRES
*1
on the TPMS warning light after the ignition is turned on and turns out the
ON
OFF
ON
OFF
3 S
DETECTED
AIR PRESSURE
*1
on
CHU0212S004