Running gear, axles, steering
Tyre pressure monitor
In this manual: Running gear, axles, steering
~2min read
System description – Tyre Pressure Monitoring System
General notes:The tyre pressure monitor display system is part of the software in the ABS control unit -J104-. The system is used to detect slow tyre pressure loss from a wheel. Event memory entries for the tyre pressure monitor display are stored in the ABS control unit -J104-. The tyre pressure monitor display compares the wheel speeds and consequently the rolling circumferences of the individual wheels with the help of the ABS speed sensors. After the following work or modifications, the tyre pressure monitor display button -E492- must be pressed and held until a confirmation is sounded.Change in tyre pressuresChanging one or more wheelsInterchanging wheels, e.g. from front to rearRemoving and fitting one or more wheelsA change in a wheel's rolling circumference will be indicated by the tyre pressure monitor warning lamp -K220- lighting up in the dash panel insert. A tyre's rolling circumference may change as a result of:Insufficient tyre inflation pressure.Structural tyre damage.One-sided loading of vehicleIncreased load on one axle, e.g. due to towing a trailerUse of snow chains.Temporary spare wheel installedWheel renewalSystem fault in the ABS system |
If a fault in the ABS is displayed by the ESP and TCS warning lamp -K155- then the Tyre Pressure Monitoring System warning lamp -K220- will also light up. However, no fault will be stored in the system for the tyre monitor display. The warning lamp cannot be erased. In this case, please carry out the following steps:
Follow instructions on screen to perform basic setting.Carrying out basic setting of Infotainment system
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