The Test Passed, The Car Failed: Why Your ISO 11452-2 Report Lies to You (Sometimes)
We had a party the day the report came back. Clean sheet. The new ADAS camera module sailed through ISO 11452-2 with flying colors. Radiated immunity? Check. Field strength at 200V/m? No sweat. The lab in Stuttgart gave us the thumbs-up. We shipped the first batch to the assembly plant in Bavaria. Three weeks later, the phones […]
Why Your $200,000 Excavator Just Cost You $4,000 an Hour—and the Diagnostic Cable Was the Culprit
I was on-site at a heavy equipment dealership in Alberta two months ago, called in because a service manager—I’ll call him Dave—had a three-year-old articulated truck that had been bay-captive for three days. The complaint was intermittent “Transmission Communication Loss,” but the data told a different story. The ECU was logging a sea of “Bus […]
Shielding vs. Filtering: When to Use Ferrite Cores, Common-Mode Chokes, and Shielded Cables for CAN Bus
I spent last Thursday morning chasing a ghost. A brand new automated guided vehicle (AGV) was dropping off the network every time its lifting mast activated. The team on site had already wrapped the CAN bus cable in enough copper foil to cover a small roof. They called it “heavy shielding.” It didn’t work. The bus still crashed. They were […]
OBD2 Cable Failure Analysis: Port Environment Teardown with Transfer Impedance Measurements
The failure report landed in our engineering queue as a PDF attachment: 18 months of maintenance logs from a Pacific Coast terminal operator. The pattern was unmistakable—a specific “heavy-duty, shielded” OBD2 extension cable model was failing at 30% between months five and seven of deployment. Intermittent connection loss. CAN bus errors. The maintenance supervisor wanted to know […]
When Your CAN Bus Isn’t Talking: A Field Guide to Splitting Ferrites, Common-Mode Chokes, and Shielded Cables
I spent last Tuesday morning staring at an oscilloscope in a customer’s lab, watching a J1939 backbone that looked more like a heartbeat monitor than a clean digital signal. The glitches were random, the error frames were intermittent, and the engineering manager was ready to swap every node on the network. When you are deep in the weeds of diagnosing intermittent CAN […]
The OEM Engineer’s Checklist: Specifying EMI-Hardened Diagnostic Cables for New Equipment
We were three weeks from the prototype ship date. The client, a major European manufacturer of agricultural equipment, had just reported that our new telematics controller was causing intermittent “ghost” errors on the CANbus during field tests. The diagnostic port, our window into the machine’s soul, was showing us nothing but digital noise. The root cause wasn’t […]