All electrics off while driving!

[rod_vw]

So, I have had it plugged in today.
As suspected no fault codes whatsoever for the issue experienced at the weekend.

What I do have is fault codes for a couple of weeks ago 18/11, all the same event.

1. No comms with cluster (ipc module) U0155

2. No comms with BCM U0140

3. No comms with diagnostic gateway U0146.

The van ecm was logged as today's correct date so this must be a separate incident but with no apparent symptoms.

I guess I start checking all connections, fuses, any corrosion, etc.

I may be wrong but I believe the dates logged on some earlier modules cannot be relied on to be correct but if you have a mileage listed on any of them that is likely to be correct.

I would be suspicious that those reports are connected with the incident that you had a few days ago. If you can publish the logs from that scan on here it may give someone with more knowledge than me a pointer to your problem.

 

[Nicky6]

Yes, these codes are from a previous event on the 18 Nov. I checked the dates on the module and they were surprisingly accurate.
There are no codes whatsoever for this incident that started this thread from 30 Nov.

Comms errors from modules and the BCM could be milliseconds I'm told and can be as simple as a loose contact, so that is what I'm going to investigate first

 

[Grim Reaper]

Loss of comms suggests Canbus fault, check for terminating resistors in the network. Should be two 120 ohm resistors in the circuit in parallel, so measuring across the canbus you should see 60 ohms if the terminating resistors are in circuit, If you only see 120 ohms there's one missing.
Loads of useful Canbus faulting videos on Youtube from the likes of South Main Auto, Pine Hollow Auto Diagnostics, Diagnose Dan, Advanced Level Auto and New Level Auto and others.

 

[rod_vw]

Yes, these codes are from a previous event on the 18 Nov. I checked the dates on the module and they were surprisingly accurate.
There are no codes whatsoever for this incident that started this thread from 30 Nov.

Comms errors from modules and the BCM could be milliseconds I'm told and can be as simple as a loose contact, so that is what I'm going to investigate first

Good luck with faulting it, please keep us posted.

 

[Nicky6]

Loss of comms suggests Canbus fault, check for terminating resistors in the network. Should be two 120 ohm resistors in the circuit in parallel, so measuring across the canbus you should see 60 ohms if the terminating resistors are in circuit, If you only see 120 ohms there's one missing.
Loads of useful Canbus faulting videos on Youtube from the likes of South Main Auto, Pine Hollow Auto Diagnostics, Diagnose Dan, Advanced Level Auto and New Level Auto and others.

Great stuff! Thanks for all the inputs on this. I'll repost if I find anything definitive that might help someone else down the line that has a similar issue.