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Corrupt Canbus, xemodex said good luck

Help, Advice, Owners' Discussion and DIY Tutorials on the Volvo S80 model. Sometimes called an "executive car", the S80 was and continues to be Volvo's top-of-the-line passenger car.
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Re: Corrupt Canbus, xemodex said good luck

Post by jimmy57 » Tue Dec 03, 2019 7:55 am

Now it is time to unplug ETM, then ECM (ETM is "behind" ECM so unplugging ECM also takes ETM out of network), then ABS. You can plug in the ETM and ECM before going to ABS to keep some modules online. One of the modules flatlining that leg of CAN now that the wiring is taken away as cause.



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Re: Corrupt Canbus, xemodex said good luck

Post by imac » Tue Dec 03, 2019 8:18 am

Is this with the engine OFF and the key ON? thanks!



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Re: Corrupt Canbus, xemodex said good luck

Post by imac » Tue Dec 03, 2019 3:22 pm

Ok, I hooked my scope up to the high speed bus at the CEM and here are the results:

This was all with the key on II.
I turned the key off between plugging/unplugging, then turned the key back to II, and took a screenshot. Figured out how to use this scope a bit better and captured a longer time sample.
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dec 3a.jpg
dec 3b.jpg
Nothing really jumped out at me as a smoking gun... what do you think?
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Re: Corrupt Canbus, xemodex said good luck

Post by imac » Tue Dec 03, 2019 3:29 pm

I haven't plugged in vida in some time, figured why not. This is what won't clear, as of today.
dec3.jpg
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Re: Corrupt Canbus, xemodex said good luck

Post by imac » Tue Dec 03, 2019 4:52 pm

The 3rd waveform with the ETM & ABS disconnected is the only one that the ground reference isn't pulled out of whack, but the waveform is junk



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Re: Corrupt Canbus, xemodex said good luck

Post by yagger » Tue Dec 03, 2019 5:42 pm

I would start from replace CEM. This is a main module.


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Re: Corrupt Canbus, xemodex said good luck

Post by yagger » Tue Dec 03, 2019 5:43 pm

If you have a CEM from same MY car, not need to program it for check signal only.


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Re: Corrupt Canbus, xemodex said good luck

Post by imac » Tue Dec 03, 2019 6:08 pm

I sent my CEM and ECM to xemodex, they said they were both okay!



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Re: Corrupt Canbus, xemodex said good luck

Post by yagger » Tue Dec 03, 2019 6:35 pm

I trust my eyes only, sorry. Maybe xemodex is good, but I do not trust them. I saw result of them work (DIM repair) and I was confused and upset after that show.


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Re: Corrupt Canbus, xemodex said good luck

Post by imac » Wed Dec 04, 2019 6:20 am

If these guys couldn't touch it, who can I trust to test my CEM, ECM, TCM, ABS?

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xemodex.jpg

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I'm in Canada, xemodex is only a couple hours drive and I had read mostly good things on forums about them, but maybe I need a second opinon.
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