Flexible Service System (FSS) Maintenance Indicator
The FSS maintenance indicator informs the driver when maintenance is due. The FSS maintenance indicator operates based on distance traveled and time between service criteria. After exceeding a total distance or total time set at the factory, the FSS maintenance indicator activates: The tool symbol (2) comes on and the FSS maintenance information (1) is displayed instead of the total mileage. The FSS maintenance indicator obtains its time information from the digital clock integrated into the Instrument Cluster. The odometer signal calculated in the Instrument Cluster is used for the mileage information. For this purpose, the Instrument Cluster receives four wheel speed signals from the CAB via the CAN data bus. (Speedometer, Odometer and the FSS maintenance indicator are therefore, closely interrelated).
The remaining mileage is compared with the remaining time at key-on. When the time criterion has reached the priority level, the display (1) switches to the remaining time. The remaining mileage display (1) will be displayed automatically with the ignition switch in the "RUN" position after 5 seconds or while driving after reaching the warning threshold. The tool symbol (2) and the current remaining mileage (1) appear for 10 seconds, then automatically with the ignition switch in the "RUN" position after 5 seconds or while driving when the remaining mileage (1) has been exceeded. In this case, the display (1-2) flashes and the "remaining mileage" (1) is indicated with a negative sign (minus sign). After reaching the display overrun at -99,000 km (or -99,000 miles), the display (1) will remain at this value.
The remaining mileage (1) is displayed to a resolution of 100 km (or 100 miles). Normally, the remaining mileage is always displayed. However, to ensure that "occasional drivers" are also made aware when FSS maintenance service is due, the mileage (1) and time information are always processed in the background. The data remains stored even in the event of a system voltage failure.
The time remaining until the next FSS maintenance service is calculated starting with the total time set at the factory. The total time means the time specified between two FSS maintenance intervals. The remaining time means the time remaining until the next FSS maintenance service is due. The remaining time is strictly a time criterion. The remaining time is reduced by one day each day regardless of the mileage. The tool symbol (2), the current remaining time (1), and "D" for days will appear for 10 seconds and automatically with the ignition switch in the "RUN" position after 5 seconds or while driving when the remaining time (1) has exceeded the time threshold. In this case, the display flashes and the "remaining time" is indicated with a negative sign (minus sign). After reaching the display overrun at -730 days, the display remains at this value. The display has a resolution of 1 day.