2016 Passat Electrical Firestorm

[Polska111]

Hey guys!

Got a 2016 Passat Alltrack with demons.

About 2 weeks ago my car started throwing every electrical system error under the sun. It would do it on ignition power, and only do it 1 in every 30-50 starts.

Each time it happened, Id turn the ignition off, attempt to restart the car and it'd start, run and drive no problem.

It was previously only doing this at ignition at startup, however today it did it mid drive and switched off in the middle of a highway.

Ive got a few small elec issues Im aware of (front air distribution servo, windshield washer pump motor), but this is a mess, and no shop is available to diagnose it for nearly a month.

Some errors I keep seeing in my logs are "Databus message missing/implausible/error value received" (across all literally every control unit), and "Lost Communication with ECM/PCM", which suggests to me either canbus or ECU?

Any ideas?

You can see the full error log at:

Dropbox

TIA!https://cloud.tapatalk.com/s/678f752e...BD11%20Log.pdf

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[BeigeJet]

Have you tried any local independent VW specialists in your area.

If not may be worth a try at Volkscare in Bayswater. Boris is the owners name.

They've been very helpful in the past with our 2006 Jetta TDI

[Polska111]

Have you tried any local independent VW specialists in your area.

If not may be worth a try at Volkscare in Bayswater. Boris is the owners name.

They've been very helpful in the past with our 2006 Jetta TDI

I usually take it to Peninsula Autohaus in Frankston but earliest they can do is early Feb, but Im gonna dona whip around tomorrow and see if anyone can book me in sooner.

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[hulbyw]

Volkscare or Volkwerke in Doncaster. Both good shops

[DV52]

@Polska111. Hi.

Hmm....... obviously from your pictures, there are multiple-problems with this car! If we could actually see the content of your OBD11 scan - stuff would be much clearer!!

Maybe first add Freeze-frame to your OBD11 account (read THIS) - then make a fresh SCAN and post-up (make sure that it actually works)

Don

[Gutoneto]

Hey guys!

Got a 2016 Passat Alltrack with demons.

About 2 weeks ago my car started throwing every electrical system error under the sun. It would do it on ignition power, and only do it 1 in every 30-50 starts.

Each time it happened, Id turn the ignition off, attempt to restart the car and it'd start, run and drive no problem.

It was previously only doing this at ignition at startup, however today it did it mid drive and switched off in the middle of a highway.

Ive got a few small elec issues Im aware of (front air distribution servo, windshield washer pump motor), but this is a mess, and no shop is available to diagnose it for nearly a month.

Some errors I keep seeing in my logs are "Databus message missing/implausible/error value received" (across all literally every control unit), and "Lost Communication with ECM/PCM", which suggests to me either canbus or ECU?

Any ideas?

Ive uploaded the full log as a .PDF.

TIA!https://cloud.tapatalk.com/s/678f752e...BD11%20Log.pdf

Sent from my Pixel 5 using Tapatalk

The log link it's not working. Could you please post here?

I think your problem is related to the gearbox. All those system relies on signals from the TCU to work. When my TCU was dying I had all those random errors on the MFD as well, but won't be able confirm until see the logs.

Is your Alltrack 6 or 7 speed?

[Polska111]

Hey guys, thanks foe the replies!

Ive uploaded the log as a txt doc here:

Dropbox


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[Polska111]

@Polska111. Hi.

Hmm....... obviously from your pictures, there are multiple-problems with this car! If we could actually see the content of your OBD11 scan - stuff would be much clearer!!

Maybe first add Freeze-frame to your OBD11 account (read THIS) - then make a fresh SCAN and post-up (make sure that it actually works)

Don

Hey Don, Ive uploaded the txt log here:

Dropbox

Thanks for the reply!


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[Gutoneto]

You have two lost of communication with the TCU and I would start with that. As mentioned, that can cause an avalanche of erros on all the other modules/systems.

U010000 - Lost Communication with ECM/PCM 

Intermittent 

U010000 - Lost Communication with ECM/PCM 

Intermittent

Have you checked if you have any oil coming out of the mechatronic connector?

[Polska111]

You have two lost of communication with the TCU and I would start with that. As mentioned, that can cause an avalanche of erros on all the other modules/systems.

U010000 - Lost Communication with ECM/PCM 

Intermittent 

U010000 - Lost Communication with ECM/PCM 

Intermittent

Have you checked if you have any oil coming out of the mechatronic connector?

I dropped the car in this morning so Im unable to check, but I haven’t noticed any oil spots on the drive nor under the vehicle.

Where would I find the TCU and connector? I cant seem to find much on location online.


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