Another tech support tale…

Chris Diagnostician Commack, New York Posted   Latest   Edited  
Case Study
Autologic
Trained By Techs
Electrical
2005 Volkswagen Jetta 2.5 2.5L (BGP) 5-spd (0A4)
No Rear Door Locks Or Windows

This vehicle was a 2005 Jetta. Customer complained rear door locks and windows didn't work. After speaking to him, I found out that the doors haven't worked for over 2 years, possibly as long as the owner had the vehicle. He also informed me that this was a friend's vehicle and it's "been to many shops". 

I'm already preparing myself for a horrible diagnosis, my favorite!

The first thing I want to do is log into the customers tool and check for codes and/or communication issues

Head over to Body

Then over to Door Electronics

I see the left and right front door modules, but the rear modules aren't there. 

Earlier model VW rear door modules were slaves of the front modules. A quick check of the diagram will shed some light on this...

These modules definitely should communicate. They all are on the same bus. 

Here is where VW and Audi get stupid, if a module stops communicating for long enough (or if it just feels like it), the gateway will just code it out.

Because Volkswagen...

Let's head back to Body

Head over to Body Electronics

Now, let's mozy on over to the Diagnostic Interface For Databus (gateway)

We can now go over to Coding

We can now check over the Gateway coding, this will show us all the modules the gateway is looking for...

There's your problem! As I suspected, the gateway coded out the modules

Let's fix that! You can see that the modules are now coded in, but in red. This indicates a communication issue in these modules (or they do not belong in the vehicle)

If you back out of the car with the scan tool and go back in, we can then look for the Door Modules again

Holy smokes!!!!! We are now can see the modules listed!!

If you reference the diagram, you will see that the modules share the same fuse.

I wanted this car fixed correctly. I advised the customer to check the door strap wiring. I had him download an app on his phone to allow me to look through his camera. I needed to see!!

He pulled the grommet at the B pillar out to check wiring. Lo and behold, the harness wasn't even plugged in!!! He checked the other side, and it was the same!

I had him plug them back in

We have good communication to the Left...

And the Right!

To be 100% sure, I went back to the gateway to check the coding. The doors are coded and in black. These are good things people!!!

I advised the customer that there was most likely a reason the modules were unplugged. He was able to take it from there. 

I just figured I would share this cool little diagnostic tip with you all. Thanks for reading

*diagrams courtesy of Motologic

+19
Julio Owner/Technician
Laurel, Maryland
Julio
 

Awesome! I admire your thoroughness with your tech support calls that you share with us. Autologic is lucky to have support techs like you, us as customers as well.

+4 Ð Bounty Awarded
Brandon Diagnostician
Reading , Pennsylvania
Brandon
 

Nice work, brother...I learn something new everyday. I don’t see many EUROs and hadn’t realized networks can douch themselves of quiet nodes 👍

+7 Ð Bounty Awarded
Chris Diagnostician
Commack, New York
Chris
   

Thanks Brandon, these vehicles keep you on your toes!

+3 Ð Bounty Awarded
Michael Diagnostician
Elmwood Park, Illinois
Michael
 

Thanks for the knowledge of this condition. Some where they thought it would be a good idea the module didnt focus on finding missing modules instead just say hey they are not there so lets not worry about them. Curious if it would recode them if they had been plugged back in for some time.

+1 Ð Bounty Awarded
Bentley Manager
San Diego, California
Bentley
 

Thanks for the write up.

0 Ð Bounty Awarded
Jaxon Technical Support Specialist
Stafford Heights, Australia
Jaxon
 

Hello Chris, thank you. What scan tool is in use, here? What is the app used for remote viewing? Thank you.

0 Ð Bounty Awarded
Bill Owner/Technician
Jackson, Michigan
Bill
 

Chris thanks for another nice write up ! I love the VW content! Does autologic offer tech support for shops that do NOT own your tooling? For example I own / use ODIS could I get your paid help if I needed assistance on one?? Thanks Bill …

0 Ð Bounty Awarded
Brin Diagnostician
Melbourne, Florida
Brin
 

Dude Chris! Brilliant diagnosis bud! That gateways a jerk!

0 Ð Bounty Awarded
Paul Technical Support Specialist
Lefkosia, Cyprus
Paul
 

Great write up. The most accurate info though that you wrote was: BECAUSE VOLKSWAGEN... Could not agree with you more. What is the app you used for viewing through customer's camera? This is a pretty common issue in the Greek area, where customers call me for such issues. Once i read rear door locks and windows didn't work, i already had an idea of what it would follow. I always have a

+1 Ð Bounty Awarded
Chris Diagnostician
Commack, New York
Chris
 

Thanks for the response. The app is Rescue Lens, which you can get in any app store. It's powered by Log Me In Rescue. Great app!!! VW is never straight forward, and it is always an adventure to get to a diagnosis.

0 Ð Bounty Awarded
Bill Owner/Technician
Jackson, Michigan
Bill
 

Does autologic offer tech support for shops that do NOT own your tooling? For example I own / use ODIS could I get your paid help if I needed assistance on one?? Thanks Bill …

0 Ð Bounty Awarded
Chris Diagnostician
Commack, New York
Chris
 

If you have a valid subscription through Autologic, yes. I can use your Odis. I generally use whatever it takes to help you get your vehicle repaired.

0 Ð Bounty Awarded
Bill Owner/Technician
Jackson, Michigan
Bill
 

Good Morning Chris and thanks for the reply A valid Subscription through Autologic? - Must one own a Autologic scan tool to have this subscription? I looked on your website for info? and have sent a request for information via the contact page this morning also. Would it also be possible for you to post some further information on DN about available tech support services so other members can

0 Ð Bounty Awarded
Greg Technician
Colorado Springs, Colorado
Greg
 

Great write-up, Chris. Many Thanks!

+1 Ð Bounty Awarded