Fault code positioning : - Exploring the environment of DTCs creation
Scania’s vehicles are market leaders when it comes to quality. Despite this, more or less serious errors occasionally occur in the vehicles. These errors generate the so called fault codes. The more you know about the errors the easier it is to prevent them and fix them. It would therefore be an advantage to know the position of the vehicles when the fault codes (DTCs) are created.
The purpose of this master thesis is to create a method to determine the position of DTCs and then use these positions to present information about the environment in which the DTCs are created. This is then visualized in a demonstrator.
DTCs and positions are gathered from two separate systems which are used by different departments at Scania. The two closest positions are taken for a chosen fault code. Linear interpolation is used to determine the DTC’s position from these positions. However, some complement cases were used due to the lack of data and bad matching in data, in addition to the interpolation method. Data were collected from both internal (Scania) and external sources. The data includes operational data from the vehicles, weather and traffic data, UV and altitude data. A demonstrator was created in form of two interfaces. One focuses on a specific occurrence of a DTC and presents it in form of a geographical plot. The other one focuses on all occurrences of a DTC and presents them in form of data tables and statistics.
Whether the method for determining the position of a DTC is accurate enough depends on how and for what purpose the position is used. A more accurate determination of DTCs positions requires better map data and a more sophisticated interpolation method. However, the used environmental data and created demonstrator are to be considered as a good start for the useage of fault code positioning. There are possibilities to continue with this thesis work, yet again depending on what the purpose is. Some approaches for future work are suggested.
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