Wheel sensor, function - GF40.15-P-3200-02A
Model 210.074/274
Model 211, 215, 220, 230, 240
Function
As part of energy management the left front TPM [RDK] wheel sensor (A69/1), right front TPM [RDK] wheel sensor (A69/2), left rear TPM [RDK] wheel sensor (A69/3) and right rear TPM [RDK] wheel sensor (A69/4) switches over automatically between the following operating modes:
- Energy-saving mode, as long as the component is in store, not fitted to the vehicle.
- As long as no pressure change which is dependent on specified value, at intervals of 55 seconds data telegrams are transmitted for system monitoring and for detecting very slow pressure changes.
- The measurement rate and transmission rate is increased (0.8 seconds) if a rapid pressure change has been detected at a wheel. The TPM control unit (N88) is thus provided with a number of measured values within a short period of time, allowing reliable evaluation of the pressure change.
- Switching off the measurement electronics and transmission electronics at temperatures > 120°C, as reliable recording of data and data transfer is not guaranteed in this driving condition. The measurement electronics and transmission electronics are switched on again automatically when cooled down < 100°C.
Energy management
Due to the finite space the battery size and as a result the battery capacity is limited An intelligent energy management system provides an estimated service life of approx. 7 years with a single battery.
If the battery is defective the left front TPM [RDK] wheel sensor (A69/1), right front TPM [RDK] wheel sensor (A69/2), left rear TPM [RDK] wheel sensor (A69/3) or right rear TPM [RDK] wheel sensor (A69/4) must be exchanged.