Mercedes canbus

Ask for and share advice on using the PicoScope kit to fix vehicles here.

Mercedes canbus

Postby mekaniker » Thu Jun 25, 2015 5:03 pm

Hello, is this normal canbus or? Noice?
Is this ok canbus or?

2000 Mercedes e 210
Posts: 1
Joined: Wed Jun 17, 2015 4:40 pm

Re: Canbus

Postby Fat Freddy » Fri Jun 26, 2015 12:31 pm

Looks OK to me. Post up the data file and you will get more help. CAN Bus uses twisted wires so what happens on one, happens one the other. So PD remains the same across the pair therefore maintaining signal integrity and eliminating noise. Dave Hill I think has put up a good example here.

User avatar
Fat Freddy
Zen Master
Zen Master
Posts: 267
Joined: Fri May 04, 2012 4:52 am

Re: Canbus

Postby tode » Fri Jun 26, 2015 8:22 pm

This signal has no noise, it is normal, the slight waves are normal.
Posts: 42
Joined: Fri Jun 20, 2014 6:59 pm

Re: Mercedes canbus

Postby arjen » Sun Jun 28, 2015 8:07 pm

I can't see the voltage level of the can high in the picture. If it's from 2.5 to 3.5 than it looks okay to me. There is a bit interference, but it should work.
What is the problem with the car?
Did you also checked for overload?

You can also ad a measurement channel (channel a - b).
There should be a square waveform than. That way you can check if the interference is different on the can lines.
Advanced User
Advanced User
Posts: 50
Joined: Wed Mar 06, 2013 7:18 pm
Location: Drachten, Holland

Re: Mercedes canbus

Postby AuthorMike » Mon Jun 29, 2015 11:00 am

(I've merged the two topics. Thanks).
Mike Valentine
Technical Author @ Pico Technology UK
Pico Staff Member
Pico Staff Member
Posts: 294
Joined: Mon Jan 31, 2011 11:22 am
Location: UK

Return to Diagnostic discussion

Who is online

Users browsing this forum: No registered users and 0 guests