GF54.30-D-3022H Display Distance, Function

GF54.30-D-3022H Display Distance, Function


Calculation of mileage
The travel distance is derived from the speed of the vehicle and the length of time that the respective speed was maintained.

Measuring the vehicle speed
To calculate the vehicle speed, the instrument cluster (A1) evaluates the wheel speeds of the following sensors:
- Left front rpm sensor (L6/1)
- Right front rpm sensor (L6/2)
- Left rear rpm sensor (L6/3)
- Right rear rpm sensor (L6/4)

The instrument cluster receives the wheel speeds in rpm from the ESP control unit (N30/4) via the Controller Area Network bus class C (engine compartment) (CAN-C).

Main odometer
Displaying the main odometer reading:
- The reading is displayed as a 6-digit number in kilometers or miles in the basic display of the display (A1p1) as soon as the instrument cluster has been activated.
- The range for the main odometer is from 0 to 999,999 kilometers or miles. If the maximum mileage is reached, the counter is not reset to 0 kilometers or miles.

Trip mileage
Displaying the trip odometer reading:
- The reading is displayed as a 5-digit number in kilometers or miles in the basic display of the display as soon as the instrument cluster has been activated.
- The range for the trip odometer is from 0 to 9999.9 kilometers or miles. Once the maximum reading is reached the display reverts to 0 kilometers or miles.

Resetting the trip odometer
The trip odometer is reset to 0 km or miles by pressing the reset button (A1s2) on the instrument cluster if the instrument cluster has been activated and the basic display (main and trip odometer reading) is shown in the display.

Storage of data
If the battery (G1) is removed, the total mileage is stored for at least 5 years.
The trip odometer reading is also protected against data loss if the battery is disconnected.
Fault behavior and shutdown interlock:
- A shutdown interlock protects the odometer against speed values which are not in the plausible range.
- In the case of a faulty rpm sensor, the ESP control unit sends a fault value on CAN-C. The instrument cluster receives this fault value and determines the travel distance from the remaining rpm values. In addition, an erroneous bit is set for the faulty rpm sensor in the fault memory.
- If the instrument cluster cannot receive a valid vehicle speed signal via CAN-C, the displayed travel distance is set to 0 km or miles and an erroneous bit is set in the fault memory.