HOW TO DIAGNOSE CAN BUS FAULTS [PicoScope 2204A Low Speed CAN] Mechanic Mindset

We look at diagnosing multiple faults on the low speed K CAN network. If you want to know how to diagnose CAN bus faults, I suggest using an oscilloscope, check out this PicoScope automotive training video. In this video we look at how to diagnose CAN Bus faults using the PicoScope 2204A oscilloscope. We also look at CAN bus waveform analysis to help you identify CAN bus problems. It can be complicated this simple CAN Bus Fault Diagnosis video we help you identify the difference between high speed and low speed CAN Bus networks and how to set up the oscilloscope to test CAN Bus. We use the PicoScope 2204a oscilloscope to analyse a CAN Bus signal while different faults are installed.

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Timestamps for How to Diagnose Can Bus Faults
00:00 Intro
00:48 CAN High verses CAN Low
02:50 How to connect the oscilloscope to CAN Bus
04:00 CAN Bus oscilloscope settings
06:00 PicoScope CAN Bus waveform analysis
07:08 CAN high short to ground waveform analysis and fault diagnosis
09:26 CAN Low short to ground waveform analysis and fault diagnosis
10:00 CAN high and low short together waveform analysis and fault diagnosis
10:44 Open circuit CAN Bus waveform analysis and fault diagnosis
12:18 How to diagnose intermittent CAN bus faults with the oscilloscope

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[taidang]

Great video!! Not a mechanic myself, but works with electronic systems on transit busses.

[MiracleMAX]

Well done Mate. I've just been introduced to your channel and find it very interesting. I'll be able to polish up my Pico Oscilloscope skills even further! 😊
MiracleMAX

[ilovear]

With my budget all I can afford is the Pico 2204a and hantek accessories, which I will be buying very soon.
Thank you for all your videos.

[toddcytra]

This was very informative, thank you very much for taking the time to help the rest of us understand these systems better.

I have a question... through all your tests your car was quiet until you ran the open circuit test. Then came the (dreaded!) BMW chime, seems that was the condition that made the vehicle unhappy. Was that an 'Electrical System Malfunction' error? That's the error/issue I'm trying to chase down in my X5.

I'm able to read the datastream in all my modules, so this one really has me scratching my head.

[arthurfricchione]

Great video thanks for sharing. Stay well and safe Artie 👍

[wannaPreG]

Great guy, am really learning a lot from your videos. Please do you have video on serial communication network, how to diagnose it with scope and what they look like

[alitehrani]

Great video, best training like always
Thanks a lot

[Middlemen]

Thanks for sharing your videos. I learned a lot watching your videos. I guess I have to buy me a Pico scope to learn more.

[careyautorepairs]

This lad is so clever when it comes to electrical work I wish I had this knowledge and could keep it all in. Such amazing skill for work and buying cheap cars.

[donovanlucibello]

You, Sir, are putting out premium content!

Sub'd

[ahmedahmed-dtew]

im a new subscriber from Egypt excellent work

[TheCarManUK]

Amazing stuff.Wish I could do this stuff like you i'd open my own garage.

[jasonjerusalem]

Thank you very informative
New subscriber here from Philippines.

[melvinbishops]

Very nice, Do you have a video explaining on how to trigger the signal ?

[arthurfricchione]

It’s nice to see that the Pico 2000 series scopes are quite helpful to troubleshoot with. Might not have all the bells and whistles of the much more expensive Pico scope but it’s just what I need. Thanks buddy 😊

[salmiabdeljalil]

Thanks for this explanation.
It's interesting
Tell me about Flexray bus how to tested?

[GhostRider-fjwq]

Great video thanks, What happens if we connect the high can bus wire from one ECU to the low can bus wire and the low can bus wire to the high can bus wire of the other ECU?

[alibatebi]

amazing video
is low speed can are fault tolerance too?
what if the module itself shorted(PCM).does it effect the can wave forms. thanks

[shifty]

I've subscribed. I have an Australian ford falcon barra. It's got 2 fault codes referring to the can communication bus network in the ABS unit. Would you have any pointers for me? Great channel.

[djamelabedennacerchiba]

Keep up the good work . Thanks indeed
I do have simple question
Do we see any difference in those waveforms if we unplug the coolant temp sensor for ex ?
Is there is any difference. Plug and unplug .
As we know
It s kind of informatin . It should be sent
On those modules ?