Tyre pressure monitoring systems (TPMS) have been fitted to cars for many years but recently TPMS has become mandatory for all new vehicles and has become a testable item for the annual MOT inspection.
Two main technologies exist; indirect and direct TPMS. Indirect systems detect wheel speed rotation differences resulting from a deflated tyre by using inputs from the ABS wheel speed sensors. This technology was unreliable and could not detect tyre deflation in more than one wheel. All modern vehicles are fitted with direct TPMS which includes a pressure sensor in each wheel which transmits readings to a control unit using radio signals. The driver’s information display can then, in most cases display the tyre pressures for each wheel and warn the driver if a tyre suffers an unexpected pressure loss.
Like with all complex electronic systems, faults can occur with TPMS components resulting in the TPMS warning lamp illuminating. We have designed our TPMS Diagnostic Health Check to help identify the most common causes of unexplained TPMS warnings both quickly and cost effectively.
Our TPMS Diagnostic Health Check uses the latest dedicated TPMS diagnostic equipment and covers the following tests:
- Checking and adjusting the tyre pressures in accordance with the tyre pressure placard.
- Carrying out a scan of all TPMS sensors to check they are responding and reporting the correct tyre pressure.
- Checking the sensor battery level*.
- Carrying out a TPMS module fault code scan.
- Carrying out a TPMS sensor ID comparison with the TPMS module*.
- Carry out a TPMS sensor relearn procedure if required*.
* When vehicle is equipped with this function.
Our TPMS Diagnostic Health Check is suitable for vehicles equipped with direct TPMS. We can also carry out diagnostic work on indirect TPMS systems, please contact us for details. Further chargeable diagnostic and/or mechanical work may be required to resolve some TPMS faults.