Instruction Manual

TPMS Manual
Whetron Electronics (Suzhou) Co.,Ltd.
- 3 -
1. Scope
This document is the function description of TPMS (tire pressure monitoring system)
of M195 model, which defines the function definition of tire pressure monitoring system
and the CAN bus message communication content between tire pressure monitoring
host and instrument.
2. Introduction
The tire pressure monitoring system is composed of sensor and ECU. The sensor
automatically monitors the tire pressure, tire temperature and other information of the
tire in real time and sends it to the ECU through RF signal. The ECU judges whether the
tire data exceeds the threshold and gives an alarm.
The TPMS scheme of M195 model adopts one-way communication scheme, that is,
there is only one-way information path from sensor to ECU.
3. TPMS Function introduction
TPMS automatically monitors the tire pressure, tire temperature and other
information in real time through two sensor modules installed in the vehicle tire, and
sends the tire pressure, tire temperature and other information to the host module in the
form of high-frequency signal according to the specified transmission strategy. The host
module sends the received information to meter through can message, and meter
through vision The audible signal is displayed. When the tire pressure exceeds the
threshold value, the host module sends an alarm message to meter for alarm, so as to
improve the safety of vehicle driving. All control functions are integrated into the TPMS
host module, and meter only displays tire pressure, tire temperature and alarm.
TPMS mainly includes the following functions：
1）Self-test Function；
2）High Pressure Warning；
3）Low Pressure Warning；
4）Very Low Pressure Warning；
5）Temperature Reporting；
6）Puncture Warning；
7）Sensor Low Voltage Warning；
8）Sensor Missing Warning；
9）Sensor Not Configured Warning；
The system structure block diagram is shown in Figure 1：