Mercedes canbus

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mekaniker
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Mercedes canbus

Post by mekaniker » Thu Jun 25, 2015 5:03 pm

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

2000 Mercedes e 210
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Fat Freddy
TwoWaves
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Re: Canbus

Post by 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.

HTH
FF

tode
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Re: Canbus

Post by tode » Fri Jun 26, 2015 8:22 pm

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

arjen
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Re: Mercedes canbus

Post by 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.

AuthorMike
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Re: Mercedes canbus

Post by AuthorMike » Mon Jun 29, 2015 11:00 am

(I've merged the two topics. Thanks).
Mike Valentine
Technical Author @ Pico Technology UK

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