Tire pressure monitor (RDK), displaying tire inflation pressure - GF40.15-P-0001-03SXU
Tire pressure display shown on model 221 up to 31.8.06
The tire pressure monitor (TPM) assists the driver in monitoring the correct tire inflation pressure.
The absolute pressure of individual tires is shown in the multifunction display (A1p13).
System message shown on model 221 up to 31.8.06
This system message is displayed briefly, if after "terminal 15 ON" current values from the wheel sensors are still not available. The same applies if wheel sensors have been replaced or other wheels have been fitted. In these cases the tire pressure monitor system checks whether changes have occurred in the position of the wheels. The pressure values are not displayed until the system has been able to recognize a unique assignment.
Detection of the wheels on the vehicle in question and management by the TPM system
Detection of the wheels and wheel sensors after the start of a journey:
- Detects new wheels after a maximum of 3 minutes, at a speed of more than 25 km/h
- Detects a missing TPM wheel sensor after max. 10 min, at a speed of more than 25 km/h
The TPM [RDK] control unit (N88) evaluates the signals from the TPM wheel sensors and stores the corresponding wheel IDs.
Automatic axle assignment after the start of a journey:
- Axle assignment of known wheels at a speed of more than 25 km/h (confirmation)
- Axle assignment of new wheels within 300 s at a speed of more than 25 km/h (e.g. spare tire fitted)
Automatic side assignment after start of trip:
- Side assignment of wheels (front axle), after max. 360 s at a speed of more than 25 km/h by evaluating the signals from the left front TPM [RDK] wheel antenna (A2/44) and right front TPM [RDK] wheel antenna (A2/45)
- Side assignment of wheels (rear axle), after a longer journey with several curves at a speed of 35 to 80 km/h (by evaluating the steering angle and different wheel speeds at the left and right rear)