The Scania Diagnos tool is connected to the truck's on-board microprocessor, in which all fault codes are stored. Scania Diagnos identifies the type of fault and even the exact location of the faulty component, so action can be taken immediately.

Since Scania Diagnos scans the microprocessor's history, it can also identify intermittent faults - which are normally very difficult to track with conventional fault-tracing methods.