How a 400-Nanosecond Edge Rate Defect Creates a Fifteen-Thousand-Dollar Phantom ECU Warranty Claim
The oscilloscope screen told a story that didn’t add up. I was standing in a test lab outside Stuttgart three years ago, staring at a CAN bus waveform on a Tektronix scope. The vehicle was a Tier 1 supplier’s next-generation telematics module—thousands of units already in field trials across Europe. The complaint was baffling: intermittent ECU communication drops, no deterministic pattern, […]