Automated Fault Injection: Short-Circuit, Open-Wire & Dominant Clamping Robustness Tests
Subjecting transceivers and controllers to physical and logical fault conditions to verify fail-silent degradation and error counter recovery.
Automotive safety standards mandate robust recovery from wiring harness trauma: • CAN_H shorted to battery voltage (+12V / +48V). • CAN_L shorted to ground (GND). • CAN_H and CAN_L shorted together. • Single-wire open circuit (evaluating single-wire limp-home operation). • Dominant clamping (detecting failed transceivers that permanently hold the bus dominant).
Automated fault injection matrices switch high-speed relays to introduce these faults while logging the controller's Transmit Error Counter (TEC) and Receive Error Counter (REC), proving that the node transitions correctly from Error Active -> Error Passive -> Bus-Off per ISO 11898-1.