Diagnostic cases
Real faults that fleets, shops and manufacturers could not fix, and how they were found with data. Every case is from Sebastian's own work.
Electric bus telematics offline, traced to the destination sign controller
An electric bus with silent telematics sat for 4 months with $300K in contract penalties on the line. Sebastian Rivera found the faulty module in under 8 hours with an oscilloscope.
Read the caseRivian battery CAN and platform CAN dropping out, traced to the dash harness
2 networks dropping out on a Rivian EV. With the scope on both, Sebastian Rivera showed CAN high and CAN low pulling to ground and traced it to the dash harness.
Read the casePre-charge fault on a battery pack the shop swore was new
The data pointed at the pre-charge circuit in a battery pack the shop said was new. It was a used pack, and the pre-charge resistor had exploded. Found in under 3 hours after 6 weeks down.
Read the caseIntermittent network fault that only showed up hot
14 technicians could not find this intermittent network fault. The data pointed to vibration, and the cause was a connector whose locking clip had never been latched.
Read the caseHydrogen bus network fault, found on a lunch break
2 service centers had already tried. On site for training, Sebastian Rivera isolated the failing network in 30 minutes and flagged the gateway, which had the wrong software installed.
Read the caseGot a vehicle nobody can fix?
Send what is happening and what has been tried. Sebastian reviews it personally, at no cost, and replies within 1 business day.
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