The TPMS is the acronym for Tire Pressure Monitoring System. This system monitors the pressure of the tire and when it drops below a certain pressure, the TPMS ECU makes the warning lamp turn on for notifying the driver. This system consists of TPMS ECU(or TPMS Receiver) and TPMS sensors. Among components of TPMS system, the TPMS sensor is installed at each wheel rim. and its role is to measure the air pressure and the temperature of the tire and then it transmits its signals to TPMS ECU. The communication from TPMS sensors is done via RF(Radio Frequency) at a frequency.
The TPMS ECU gets signals of the vehicle speed and then uses thoses for auto-learning and judgment for DTC.
If there is not any signal of vehicle speed through CAN communication line, TPMS ECU sets this fault code.
TPMS ECU compares the signal of vehicle speed via CAN communication line with the G value of WE sensor.
If there is any difference out of specific range, TPMS ECU sets this fault code.
Item
Detecting Condition
Possible cause
DTC Strategy
CAN Signal Check
Poor connection
Faulty wheel Speed Sensor
Faulty WE Sensor
CAN communication
Enable Conditions
When a velocity of driving is more than 15mile/h(25Km/h)
Threshold value
When TPMS ECU could not receive any signal of vehicle speed continuously for 3 seconds
Although the signal of vehicle speed is less than 3mile/h(5Km/h), the G value of the WE sensor is more than 5g in continue