Mercedes canbus

Ask for and share advice on using the PicoScope kit to fix vehicles here.
Post Reply
mekaniker
Newbie
Posts: 6
Joined: Wed Jun 17, 2015 4:40 pm

Mercedes canbus

Post by mekaniker »

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

2000 Mercedes e 210
Attachments
image.jpg

User avatar
Fat Freddy
TwoWaves
TwoWaves
Posts: 335
Joined: Fri May 04, 2012 4:52 am

Re: Canbus

Post by Fat Freddy »

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.

HTH
FF

tode
OneWave
OneWave
Posts: 48
Joined: Fri Jun 20, 2014 6:59 pm

Re: Canbus

Post by tode »

This signal has no noise, it is normal, the slight waves are normal.
Regard

arjen
TwoWaves
TwoWaves
Posts: 53
Joined: Wed Mar 06, 2013 7:18 pm
Location: Drachten, Holland

Re: Mercedes canbus

Post by arjen »

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.

PicoMike
Pico Staff Member
Pico Staff Member
Posts: 338
Joined: Mon Jan 31, 2011 11:22 am
Location: UK

Re: Mercedes canbus

Post by PicoMike »

(I've merged the two topics. Thanks).
Mike Valentine
Online BDM: Pico Technology

Post Reply