Daimler-Benz Ag

Mercedes-Benz Aktiengesellschaft

Thomas Forchert

Erwin Wuchner

Konstantin Muller

Gunter Knorzer

Siegfried Loos

Ulrich Visel

A method for detecting malfunctions in a motor vehicle, in which data words formed in subassemblies (sensors or components) upon detection of a malfunction therein are read by an analysis unit. The data words are also formed by the subassemblies when a malfunction detected by a peripheral subassembly is not traceable to said subassembly. Functional chains are determined in a device on the basis of the malfunctions detected by the subassemblies and represented by the corresponding data words. The functional chains contain all the sources of error related to the malfunctions. A list of test steps is drawn up in the device and stored at memory locations provided for this purpose. The test steps allow checking all the sources of error, and the functional chain is completely checked after execution of the test steps.

Method for detecting malfunctions in a motor vehicle

A device for signal path control in a motor vehicle permits the reception or the transmission of signals from or to a multiplicity of electronic units via a cable with a small number of line conductors. The device is universally applicable and is suitable for both on-board and off-board applications. Its robustness makes it suitable also for diagnostic systems in motor vehicles.

Universally and bidirectionally operable device for signal path control

Growing community of inventors

Stuttgart, Germany

Thomas Forchert