Mazda RX-8 2004 Service Highlights page 186

Function list
Identification code recognition function
Tire pressure determination/warning
function
Identification code recognition function
• Since the identification codes of wheel units mounted on the vehicle have been configured in the TPMS control
module, the module 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 RF signal. When the identification code does not agree, that signal data is
ignored.
Tire pressure determination and warning function
• The TPMS control module determines the tire pressure status of each wheel by comparing tire pressure data
received from the wheel units with the preset values in the module.
• When an abnormality is determined from the data, the module sends control signals through CAN
communication to the instrument cluster that cause the TPMS warning buzzer to sound and the TPMS warning
light to illuminate. This alerts the driver of abnormal tire pressure.
• The tire pressure monitoring function is classified into the two low and high-pressure determinations.
• The informing/warning of an abnormal tire pressure determination takes precedence over the informing/
warning of a missing signal or malfunction determination.
WHEEL AND TIRES
• Recognizes whether received signals are from own wheel units.
• Compares received tire pressure data with preset values in the TPMS control
module. If the pressure is determined to be too low or high, the module alerts
the driver via the TPMS warning light and buzzer.
02–12
02–12–7