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Tire Pressure Monitoring System (TPMS)
3
D. COMPONENTS
1. TPMS ECU
The TPMS ECU is control unit that receives RF
signal coming from tire sensors and transmit tire
condition over CAN bus.
TPMS ECU have the following main tasks:
1. If vehicle power mode is IGN ON, TPMS ECU
sends tire status information (i.e. Low/ High
Pressure/ Air leakage / High Temperature warning
indications /
Tire pressure and Tire temperature
data.
) to IPC.
2. IPC displays TPMS screen with 4 tire based on
available tire configurations value received from
TPMS ECU.
PINOUT DETAILS
PIN
DESCRIPTION
1
+B
3
IG SW
5
CAN L
6
CAN H
7
GND
2, 4, 8, 9,
10, 11 &
12
DUMMY
2. TIRE PRESSURE SENSOR
Tire sensor measures pressure and temperature
value of the tire and transmit RF signal to TPMS
ECU. Each sensor has a unique identifier into the
internal memory and the power source is 3V
lithium battery cell built in the sensor (cannot be
replaced). The aluminum valve body has a function
for the antenna.