General Information

Component Location





General Description




[Wheel Electronic (WE) sensor unit]-TPMS sensor
Each vehicle wheel is fitted with a Wheel Electronic (WE) sensor unit attached to the valve on the inside of the wheel. The WE unit is powered with a self-contained battery utilizing a high temperature rated CR (Manganese Dioxide Lithium) chemistry. The operating voltage range for the WE module is 2.2 Vdc to 3.6 Vdc and the operating temperature range is -40 °F to 257 °F (-40 °C ~ 125 °C). 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 WE sensor is equipped with a Radio Frequency (RF) transmitter circuit which is used to periodically broadcast information from inside the tire. All WE sensor units operate on the same RF channel frequency and each broadcast message includes pressure and temperature data, a unique ID code, operating state data, status information and digital error-detection data.
The pressure measured by the WE sensor is an absolute pressure value. The pressure measurement range is 100 kPa to 450 kPa. The acceleration data is used within the WE sensor to determine whether the vehicle is moving or stationary. The acceleration status is the decision maker within the WE module that determines if the tire is moving or stationary. This measurement is used within the WE module to enable different operating modes depending on the status of the acceleration value. Over the fully specified operating temperature range, if the acceleration measurement is greater than or equal to 20G, the WE module assumes the tire is moving.
The basic operation of the L/L WE sensor is to transmit 3 frames every 3 minutes in both stationary and rolling modes.

DTC Description

This DTC indicates that "H/Line WE sensor" was installed to a L/Line system incorrectly.

DTC Detecting Condition