hi thanks for your reply, that was my original plan as I usually find the waveform library very useful but in this instance didn't have what I needed unfortunately

I have a Vauxhall mokka 1.7 cdti (LUD) with an intermittent bad start when hot (it does fire but sounds rough and cuts out). I had a quick look the other night but annoyingly couldn't get the car to play up. All I'd like to know is if the crank sensor is pulling to ground clean enough in my capture?...

thank you that's good to know

Yes sorry I should have been more clear, it wasn't a Can line shorting out.
I've since taken the car on a few test drives probably totalling 20 miles. I still have the strange irregularities in the Can H/Can L yet I have no communication faults or fault codes. So am a little confused on that aspect

again thank you for your replies. yes Steve you were right the communication errors were being caused by the fault. Sorted, behind the heads the transmission loom had a wiring loom clip off. The loom was sitting against the egr pipe, a tiny part of the insulation on a wire had melted allowing it to ...

Range Rover Sport Reg: AK57 ZRC Intermittent fault codes (after a couple of mins driving): U0100-87: lost comms with PCM U0101-87: lost comms with transmission control module U0155-87: lost comms with instrument cluster control module Permanent codes: P0630-00 VIN not programmed or incompatible-engi...

Sorry Steve I managed to completely miss your reply when scrolling through, unfortunately I can't add a 3rd wave form as yet as mine is only 2 channel. (My motorcycle is funny enough up for sale as I want the money to order 4 channel advanced kit) That's a real thorough process you've given me, than...

Forgot to mention the 3 volt spikes were on another waveform taken when driving down the road. So far I've tried unplugging a lot of the modules on the network, still got a few left to go. I've also tried removing the alternator main lead as well

Thank you for all your replies. I'll actually be looking at the car again tomorrow so will check out all mentioned items. I've added a math line (A-B) to the screen and I actually have a 2 volt differential majority of the time but very sporadically there are 3 volt spikes in the maths wave form, my...

Can anybody shed any light on CAN H and CAN L wave forms, especially in frame 29. just looking for an answer for what might cause such disruption on the lines