General Information

General Description

The TPMS system is intended to alert the driver of a motor vehicle if one or more tires on the vehicle has become under-inflated. The Tire Pressure Monitoring system comprises three different types of components which are TPMS Receiver unit, Wheel Electronic (WE) sensor units and Low Frequency Initiator (LFI) units.
A HIGH-LINE TPMS Receiver performs the same functions as the LOW-LINE RX, but in addition is equipped to control four Low Frequency Initiator (LFI) devices, fitted to the vehicle near each of the four tire locations.
Each vehicle wheel is fitted with a Wheel Electronic (WE) sensor unit attached to the valve on the inside of the wheel. The WE measures tire pressure, temperature, and acceleration periodically. The pressure, temperature, and acceleration information is converted to digital form within the MCU inside the WE sensor.
The LFI is located at each vehicle wheel house (F/L, F/R, R/L, R/R). Only HIGH-LINE systems are fitted with LFI units. An LFI unit is mounted in each wheel well of a vehicle to enable the Receiver unit to determine the vehicle position of each WE for which it has a stored ID code.

DTC Description

This DTC indicates that an unmonitored tire is detected.

DTC Detecting Condition