Technical Ducato canbus going to sleep odd one

[Keith Spencer]

This is a video of the oscilloscope on the high speed Canbus of a 2009 fiat ducato motorhome.
Everything looks fine until just before going to sleep and then the voltages drop to 1 volt and then back up again between each data packet for a second or two.
The system then produces a DTC for the body module saying no canbus bad wiring. It also then produces similar dtc for the airbag and instrument cluster.
Has anyone any experience similar to this?
No faults evident YET during driving!
Thanks in anticipation.

 

[theoneandonly]

ive just looked at my BCM error. No known problems just checking.

This is on a 2017 2.3.
Have you had any joy?
If still concerned try this group on faceache

PicoScope Automotive (Scope Diagnostics)
I got some help on diagnosing an injector issue, but they need a trace with the injector and crank shaft sensor, and I cant intentify/ get at the sensor. (also cant get pin out information for the ecu which would be an alternative. Note they are a Pico run group but look at other traces.

 

[Keith Spencer]

I've sorted it, disconnected ABS module and all went back to normal. So installed oem module and proxy aligned, using DNA vehicles in Bodmin. All perfect now £1000 poorer. Too old for fiat dealer to help.