Operation; Component Parts/Function - Mazda 2006 MX-5 Service Highlights

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

Part name
Wheel unit
Keyless receiver
Keyless CM (with advanced keyless
system or keyless entry system)
PCM Vehicle speed signal
Instrument
TPMS warning light
cluster
Flat tire warning light
TPMS warning buzzer
Flat tire warning buzzer
End Of Sie
WHEEL AND TIRES
• Monitors air pressure, temperature, and acceleration of each tire, and sends
RF signals.
• Sends data if any abnormality is detected in the wheel unit.
• 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.
• Receives data from the keyless receiver.
• Sends data to the instrument cluster.
• Inputs vehicle speed signals to the instrument cluster via CAN communication.
• 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.
• If the instrument cluster detects abnormal air pressure or any abnormality in
the system, the light is illuminated to alert the driver.
• If the instrument cluster detects flat tire, the light is illuminated to alert the
driver.
• If the instrument cluster detects abnormal air pressure any abnormality in the
system, the buzzer is sounded to alert the driver.
• If the instrument cluster detects flat tire, the buzzer is sounded to alert the
driver.
Function
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