PicoScope 7 Software
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Picoscope 2205A to acquire F-CAN signals
Picoscope 2205A to acquire F-CAN signals
Dear all.
Good morning.
Hope this post finds you all in good health in these tough times.
I need your support in finding what I might be doing wrong in setup my recently acquired Picoscope 2205A.
What I want to do is: monitor F-CAN network signals in a vehicle for quick checking if there is any short to ground or short to battery positive or short between canH and can!.
The setup I am using: voltage scale = +/- 10V
Timebase = 50 us
Sample = 8KS
I have checked for the integrity of the scope leads by checking the battery voltage supply, both at the battery itself and at the DLC between pins 16 and 4. I can see battery voltage.
What am I seeing when I am checking a known good car (I want to use it as my reference for checking a faulty one): when I switch ON the ignition I can only see a flat line showing about 2,5V for both canH and canL (the same thing as I can see with my multimeter).
I tried with another car and it behaves in the same way, so I am wondering if I am missing something in the configuration of my Pico2205A.
Both vehicles have canH and canL connections at the DLC, and I am not suspecting of the backprobes I am using because I can see voltage readings.
I tried checking with ignition ON, and with engine ON, but still no luck in getting the CAN signals.
I checked on YouTube and found some videos of people using the Pico2204A to check F-CAN. Could not find any video for Pico2205A.
Any help on this topic is highly appreciated as I am now stuck on this and really need to progress with my troubleshooting. The multimeter just can’t keep up with it and I can’t really afford the automotive advised picoscope.
Thank you in advance for your support.
Best regards.
Good morning.
Hope this post finds you all in good health in these tough times.
I need your support in finding what I might be doing wrong in setup my recently acquired Picoscope 2205A.
What I want to do is: monitor F-CAN network signals in a vehicle for quick checking if there is any short to ground or short to battery positive or short between canH and can!.
The setup I am using: voltage scale = +/- 10V
Timebase = 50 us
Sample = 8KS
I have checked for the integrity of the scope leads by checking the battery voltage supply, both at the battery itself and at the DLC between pins 16 and 4. I can see battery voltage.
What am I seeing when I am checking a known good car (I want to use it as my reference for checking a faulty one): when I switch ON the ignition I can only see a flat line showing about 2,5V for both canH and canL (the same thing as I can see with my multimeter).
I tried with another car and it behaves in the same way, so I am wondering if I am missing something in the configuration of my Pico2205A.
Both vehicles have canH and canL connections at the DLC, and I am not suspecting of the backprobes I am using because I can see voltage readings.
I tried checking with ignition ON, and with engine ON, but still no luck in getting the CAN signals.
I checked on YouTube and found some videos of people using the Pico2204A to check F-CAN. Could not find any video for Pico2205A.
Any help on this topic is highly appreciated as I am now stuck on this and really need to progress with my troubleshooting. The multimeter just can’t keep up with it and I can’t really afford the automotive advised picoscope.
Thank you in advance for your support.
Best regards.
Re: Picoscope 2205A to acquire F-CAN signals
Hi HJAN,
As this is the Test and Measurement forum, I would suggest that you post your enquiry on our Automotive forum here: https://www.picoauto.com/support/, where you're likely to get a better response.
Regards,
Gerry
As this is the Test and Measurement forum, I would suggest that you post your enquiry on our Automotive forum here: https://www.picoauto.com/support/, where you're likely to get a better response.
Regards,
Gerry
Gerry
Technical Specialist
Technical Specialist
Re: Picoscope 2205A to acquire F-CAN signals
Can you post a link to the video showing how others are doing this. Sounds like a scope setup issue.
Martyn
Technical Support Manager
Technical Support Manager
Re: Picoscope 2205A to acquire F-CAN signals
Hello Martyn.
Good afternoon.
Here are some links for your reference. I know these show the 2204, but I believe the 2205 should work also to capture the can-bus signals.
https://youtu.be/ncQfdhzUFCk
https://youtu.be/SGwWLfrDiAg
Hope these can be helpful.
Good afternoon.
Here are some links for your reference. I know these show the 2204, but I believe the 2205 should work also to capture the can-bus signals.
https://youtu.be/ncQfdhzUFCk
https://youtu.be/SGwWLfrDiAg
Hope these can be helpful.
Re: Picoscope 2205A to acquire F-CAN signals
Have you enabled a trigger ? This will help to stabilise the signal at the point where data is on the CanBus.
Try saving a psdata file File->Save and then post this here and we can check the setup.
Try saving a psdata file File->Save and then post this here and we can check the setup.
Martyn
Technical Support Manager
Technical Support Manager
Re: Picoscope 2205A to acquire F-CAN signals
Hello. Good morning. Sorry for the late reply. Only recently I was able to test again. The vehicle I am testing is a CR-V hybrid (it features a CAN-Gateway).
You can find attached the .psdata file for your reference.
Hope this helps.
Thank you once again for your support.
You can find attached the .psdata file for your reference.
Hope this helps.
Thank you once again for your support.
- Attachments
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- 20201111-0001.psdata
- (75.22 KiB) Downloaded 253 times
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- 20201111-0001.psdata
- (75.22 KiB) Downloaded 257 times
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- 20201111-0001.psdata
- (75.22 KiB) Downloaded 255 times