Related issue: How to fix problem with jumps in values for mileage, fuel consumption (from on-Board computer) – Ruptela

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Issue description:

In some models of Mercedes Benz Actros, incorrect mileage data is coming from the on-board computer. It appears either as mileage being stuck or random data jumps.
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Causes of the issue:

The malfunction and incorrect data are associated specifically with the on-board computer itself and the data it produces. In some cases, the reason for stopping the display / changing the mileage may also be the use of a magnets (or other interfering devices).

Actions:

1. Check what is the device type affected (PRO5/HCV5/LCV5/Tco4/Pro4/etc.)

2.1. In case the device has Tachograph support (TCO parameters), check whether the tachograph is connected (TCO parameters are being received). Then, proceed to step 3.

2.2. In case it is a PRO5/Pro4 device or Tachograph is not connected, it is necessary to identify the time and exact dates of the indicated "problem" first appeared. This information is needed to apply a filter to hide incorrect mileage values ​​(i.e., underestimated or overestimated mileage readings).

Examples of setting a filter to stop displaying low mileage are displayed in the picture below. When a filter was set for minimum values ​​that should be higher than "erroneous" data, which will not allow them to be displayed in the system. The filter for "overestimated data" of mileage is set in the same way, if required.

If, in the case of an incorrectly displayed mileage, setting the filter does not help, then the only option is to read the data by the "TCO Distance parameter", since other methods will not be able to solve the problem of the vehicle's on-board data.

3. For HCV5/Tco4 HCV devices that receive data from the tachograph, the most simple and accurate solution is to set the IO parameter "TCO Distance" as a mileage parameter (which must be set both in the tracker configuration and in the object settings in the Admin panel).

Admin panel input recalculation coefficients are the same as for CANbus high resolution total vehicle distance: ##{{0,0},{1,0.005}} or p1/200.

Parameter reading can be activated by sending SMS as well:

Note: In case the magnet is used, the information on the mileage (CANbus distance) will simply stop changing, along with the actual fuel consumption and the presence of engine speed (CAN wheel speed), which is received from the on-board computer. In such situations, it is necessary to double check whether any changes have been made to the device configuration and whether it is not a physical issue. It is sometimes used to fake driver's mileage but is should not be assumed as a first options because usage of magnets is illegal. Sometimes similar behaviour can be cause by on-board computer failure, especially in older vehicles.

In case troubleshooting does not provide results, inform the client that the mileage for the specified period will need to be recalculated according to the readings of the Virtual Odometer (which will show the distance travel.ed by GPS coordinates).