Tire Pressure Monitor (TPM) System

NOTE: If a tire pressure has been adjusted, or a wheel or tire has been replaced, the TPM system must be reinitialized. See RESET PROCEDURES .

NOTE: The current status of the TPMS can be displayed on the Control Display anytime, whether or not the system is active.

CAUTION: When a low inflation pressure is indicated, DSC (Dynamic Stability Control) is switched on, if necessary.

Vehicles are equipped with one of either of two types of tire pressure monitor system:

The Flat Tire Monitor (FTM) system , which uses the ABS system to measure each tire's rolling radius changes and with it, the rotational speed of the wheels. Changes are detected and signaled as a flat tire. The Flat Tire Monitor (FTM) system does not use tire pressure sensors in the tires.
In the following situations, the system could be delayed or malfunction:
- When the system has not been initialized.
- When driving on snow-covered or slippery road surfaces.
- Sporty driving style: slip in the drive wheels, high lateral acceleration.
- When driving with snow chains.
The Tire Pressure Monitor (TPM) system , uses tire pressure sensors installed in the tires to check the tire inflation pressure in the four mounted tires. The system indicates if the tire inflation pressure has dropped considerably in one or several tires.
The system is inactive and cannot indicate a flat tire:
- For a mounted wheel without TPM electronics.
- When the TPM is disturbed by other systems or devices with the same radio frequency.