Ensuring robust and reliable electronic control units (ECUs) in automotive applications is crucial for vehicle safety and performance. This thesis introduces an advanced methodology to enhance test coverage in automotive projects through the utilization of Canoe, a sophisticated testing and simulation tool for embedded systems. By leveraging Canoe’s extensive capabilities, this research presents an optimized framework for validating communication protocols and diagnosing system behavior under various test scenarios. The approach adopted in this work allows for a more systematic and automated method of verifying network reliability, minimizing manual intervention, and improving efficiency in detecting potential failures. The core methodology focuses on testing the behavior of automotive network frames by systematically varying the frame absence time on the CAN bus.