Fault Search Strategies Including Vehicle Log Files

Abstract

The use of high-performance computers (HPCs) in Software Defined Vehicles (SDVs) provides an additional source of in-vehicle data from future vehicles. Today, troubleshooting is mainly focused on diagnostic trouble codes (DTCs) in electronic control units (ECUs) which can be retrieved via Unified Diagnostic Services (UDS). Log files from HPCs can provide important information about the processes in the vehicle and are therefore also of interest when analyzing the fault memory and repairing the vehicle. In order to use this information, it is necessary to match DTCs and log files. The Retrospective Event Correlation Engine (RECE) introduces a suitable procedure for matching DTCs and log files by using correlation identifiers (IDs) in the vehicle. Creating a proof of concept within a limited controlled test environment offers the chance to demonstrate the function and use of statistical log correlation and anomaly detection. An implementation of this procedure in future architectures may enable workshops to include log files and their correlation into their troubleshooting strategies.