WHEEL AND TIRES
02–12–5
02–12
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 TPMS control module receives these signals with a built-in antenna.
•
The TPMS control module monitors the air pressure of each tire based on the tire data sent from each wheel
unit. If the module detects an excessive drop in air pressure or air pressure higher than a specified value, the
module illuminates the TPMS warning light and sounds the TPMS warning buzzer via CAN communication to
alert the driver.
Component Parts/Function
End Of Sie
WHEEL UNIT CONSTRUCTION/OPERATION
CHU021237140S01
Construction
•
The wheel unit is installed to the rim of each wheel with a nut. It monitors air pressure, temperature and
acceleration of the tire, and sends the data as RF signals.
•
The wheel unit also serves as a tire valve.
Operation
•
The wheel unit operates on a built-in battery, and regularly sends tire data as RF signals. The data it sends is
retrieved using a sensing function that monitors tire pressure and temperature, and a self-diagnostic function
that detects battery status and sensor malfunction.
•
To maximize the life of the built-in battery, the unit uses the detected air pressure and acceleration to determine
vehicle conditions such as driving and long stops, and operates in a mode appropriate to vehicle conditions so
that battery consumption is minimized.
•
Each wheel unit has its own identification code that is sent together with tire data and is used to verify which tire
has abnormal tire pressure. Therefore, when the wheel unit or the TPMS control module is replaced, the
identification codes must be configured.
Part name
Function
Wheel unit
•
Monitors air pressure, temperature, and acceleration of each tire, and sends
RF signals.
•
Sends data if any abnormality is detected in the wheel unit.
TPMS control module
•
Receives RF signals from the wheel units and monitors the air pressure of each
tire. If it determines from these signals that tire pressure is abnormal, it controls
the TPMS warning light and buzzer via CAN communication to alert the driver.
•
Controls the on-board diagnostic system if it receives an abnormal signal from
the wheel unit.
PCM
Vehicle speed signal
•
Inputs vehicle speed signals to the TPMS control module via CAN
communication.
Instrument
cluster
TPMS warning light
•
If the TPMS control module detects abnormal air pressure, the light is
illuminated to alert the driver.
•
If any abnormality is detected in the system, the light is flashed to inform the
driver.
TPMS warning buzzer
•
If the TPMS control module detects abnormal air pressure, the buzzer is
sounded to alert the driver.
WHEEL UNIT
CHU0212S002
Содержание 2004 RX-8
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