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(fixed)vw transporter t5. window lift not working.

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7 years 7 months ago - 7 years 6 months ago #2830 by Inge Jeppesen
(fixed)vw transporter t5. window lift not working. was created by Inge Jeppesen
2008 model vw t5. Both el. Windows not working. Got power and ground to the door module. Works some times.

Any input would be great. :cheer:
Last edit: 7 years 6 months ago by Inge Jeppesen.

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7 years 7 months ago #2834 by Noah
Replied by Noah on topic vw transporter t5. window lift not working.
Hey Inge! Got a diagram for this one?
I always suspect a chaffed wire loam in the door jamb area with any complaint like this.
"Ground cannot be checked with a 10mm socket"

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7 years 7 months ago #2855 by Inge Jeppesen
Replied by Inge Jeppesen on topic vw transporter t5. window lift not working.
Yes. Got diagram. Have checked for chaffing on both sides. seems ok.
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7 years 7 months ago #2856 by cheryl hartkorn
Replied by cheryl hartkorn on topic vw transporter t5. window lift not working.
does the passenger window work from its own switch? or your saying the windows work sometimes from the drivers door. I don't think I have ever seen a vw transporter before in the states. maybe just a bad switch. trying to read the wiring diagram but the legend is in another language

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7 years 7 months ago #2860 by Doc
Replied by Doc on topic vw transporter t5. window lift not working.
Here's a simplified diagram, Inge does this look relevant for your vehicle?
HTH
Steve...


File Attachment:

File Name: Wiringdiag...dows.pdf
File Size:162 KB
Youtuber specialising in Diagnostic techniques, sharing skills and helping technicians be the best they can be #Picoflu
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7 years 7 months ago #2863 by cheryl hartkorn
Replied by cheryl hartkorn on topic vw transporter t5. window lift not working.
do you have a scanner that can read data pids from the door modules? and perform bi directional testing?? if you command the window down with a scanner and it works then id look for an input issue. if it doesn't work test test power/ground at the module loaded circuit test. ive done it on some jettas and passats never a transporter

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7 years 7 months ago #2888 by Inge Jeppesen
Replied by Inge Jeppesen on topic vw transporter t5. window lift not working.
The passenger side window sometimes work, when it does it is from both switches. I have loaded the supply circuit and it is ok. Tried scoping the LIN bus but was not sure what I was looking at. Seemed like 12 volts with some noise over it.

Also I have tried with a known good switch. No difference.

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7 years 7 months ago #2889 by Inge Jeppesen
Replied by Inge Jeppesen on topic vw transporter t5. window lift not working.
Also Steve,

Spot on. Looks right. It is also a BRS engine :)

I'm starting to believe it to be the door modules acting up. The only thing bothering me is the LIN. It does not do what I was expecting.

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7 years 7 months ago #2899 by Tyler
Replied by Tyler on topic vw transporter t5. window lift not working.

Inge Jeppesen wrote: I'm starting to believe it to be the door modules acting up. The only thing bothering me is the LIN. It does not do what I was expecting.


Any way you can get a shot of your waveform, sir? Just curious to see a screwy LIN waveform :ohmy:

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7 years 7 months ago - 7 years 7 months ago #2907 by Inge Jeppesen
Replied by Inge Jeppesen on topic vw transporter t5. window lift not working.
Tyler;

Well I probably could. My scope has difficulties zooming in when the signal is 12 volts. So the resolution is only 1 V\div.
The 12 volt signal goes above the screen, when I adjust it down and zoom out it's not visible if you know what I mean. Hope you do.
Maybe I'm using the scope wrong.

The only noise I can see is that the signal line gets thicker when I turn on the ignition. It might as well just be noise and no evidence of communication. Not sure what kind of voltage change the lin bus operates,
Last edit: 7 years 7 months ago by Inge Jeppesen.

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7 years 7 months ago #2908 by Tyler
Replied by Tyler on topic vw transporter t5. window lift not working.
Ah OK, I gotcha, sounds like the scaling on your scope isn't cooperating :( Sorry, sir.

Most LIN messages I've seen look something like this:

[img


To me, it sounds like you're describing noise or a faulty signal, instead of correct communication.

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7 years 7 months ago #2930 by Inge Jeppesen
Replied by Inge Jeppesen on topic vw transporter t5. window lift not working.
Did some troubleshooting today. And when I disconnect and connect the driver door harness the Lin comes to life and every thing works.

For a long period. If I close the doors, pull in the harnesses nothing happens. There is a computer problem somewhere shutting of the communication.

When it happens nothing in the doors will work except mirror adjustment. Own circuit.

Have added a picture of the scope.
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7 years 6 months ago #3446 by Inge Jeppesen
Replied by Inge Jeppesen on topic vw transporter t5. window lift not working.
Problem fixed. Changed the door module including motor and everything is working!
The following user(s) said Thank You: Noah

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7 years 6 months ago #3449 by Noah
Replied by Noah on topic vw transporter t5. window lift not working.
Great, nice to see you got it wrapped up!
"Ground cannot be checked with a 10mm socket"

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