CBS system, service inspections, vehicle operation

The article presents the genesis and service capabilities of the CBS system used in BMW vehicles. It also shows methods for resetting service indicators using manual procedures and diagnostic interfaces. Additionally, selected problems related to the implementation of BMW vehicle service using the CBS system are presented.1. GENESIS OF THE CBS SYSTEM
The first system monitoring the service status of BMW vehicles was the SII (Service Interval Indicator), which informed the driver well in advance about the upcoming vehicle inspection date and the need for fluid changes. This was done using a display located on the dashboard. An example of such a message is shown in Figure 1. Determining the vehicle service appointment date or the number of kilometers after which the vehicle should be serviced was possible thanks to the implementation of appropriate calculation algorithms in the controller [4, 5]. The SII system was used in BMW vehicles until 2002. Subsequently, the CBS (Condition Based Service) was introduced, which represents the next stage in the development of on-board diagnostic systems, meeting the requirements of 21st-century vehicles. The first BMW vehicle in which the CBS system was implemented was the 7 Series E model. This system was built to improve and provide flexibility in the execution of the vehicle’s service schedule. Compared to the previously used system, CBS is more innovative. It collects information from various vehicle controllers and sensors to determine the optimal vehicle service schedule. This makes it possible to avoid situations where components in good technical condition, which can still be operated, are replaced during vehicle service. (…)

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