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Decades ago, like the 1990s automobile industry, the off-highway industry was purely recognized as a mechanical entity. In the mechanical system, accuracy and troubleshooting of faults were significant concerns. Additionally, the continuous stringent emission norms by the government call for the adaptation of the aftertreatment and DeNOx led to more complexity and challenges. To meet the government emission regulation and product performance, thorough functionality testing of manufactured units was crucial. For this purpose, EOL/diagnostics testers are developed. Diagnostic protocol CAN establish the connection between ECU and tester due to its robustness and data handling capabilities. This paper aims to develop and test the end-of-line (EOL) tester for off-highway diesel engines. The communication between the tester and ECU will be over UDSonCAN, conforming to standard ISO14229.

In the rapidly evolving automotive landscape, integrating cutting-edge off-board diagnostics tools has triggered a paradigm shift in diesel engine applications. Simultaneously, engineers are compelled to transform conventional mechanical engines into advanced common rail direct injection (CRDi) systems amidst India’s changing pollution norms for industries. Aligned with Bharat Stage Emission Standards, non-road vehicles face stringent emission limits, necessitating complex electronic control predominantly managed by the engine control unit (ECU). Government mandates require the ECU to detect NOx control malfunctions and emission-affecting faults, storing data for off-board analysis. A tool that can read engine data and monitor engine health is required to deal with this situation. Network protocols such as CAN enable remote communication with specialized ECUs.