Pump is bad.

I am also puzzled about the diagnostic process. Measuring behind a galvanic isolated gateway, what for. Second, measure after engine is stopped, battery disconnected, which is like trying to catch a burglar 3h later. I would keep the scope to the faulty bus with long time base, 1s per division, samp...

Great input from everyone, just a mention, that was an oem sensor 13 years old. It’s notorious difficult to get access to its plug from above so I measured only one wire to ground at engine ecu plug.

This is a fast one. Crank, no start, fuel pressure ok, bi-directional control can spark the plugs, no fault codes. During crank, rpm on diag erratic. You all know where this goes. Crankshaft sensor. But funny how it fails. crank corsa d.png Do you see anything wrong? Well, thanks to youtube, I learn...

LED drivers are notorious to induce EMC in electrics. Does not cost you much to give it a try with their wiring disconnected from CANBUS.

Absolutely, I've done 3 case studies here for trouble with CANBUS and in general I've seen them all: - shorts between H/L - bad connectors - bad modules - short to ground https://www.picoauto.com/support/topic18541.html https://www.picoauto.com/support/topic17791.html https://www.picoauto.com/suppor...

003 and 004 show some good waveforms, managed to decode some data but indeed, sample rate is too low. And again, you need to connect scope probes negative to battery minus pole, not in the obd plug. Even if this means to use extended cables. 004 is the best and shows no trouble on canbus, at the tim...

Sorry, on mobile and can’t see waveforms.
Rule #1 trigger to OFF and stays off.
Rule #2: ground reference is always battery negative.

On a short look in all waveforms, seems to be no comm at all. Something is wrong with your capture. -20/+20V scale does not do any good. -5 to +5V would be ideal. We need to learn how you actually connect the scope, if any atenuators are used. No triggers to be used. No point trying to decode someth...

My work around is to hit Preview, then I can see that line with Place in line. Then I keep typing.