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Go Back   TDIClub Forums > TDI Model Specific Discussions Areas > VW MKV-A5 Golf/Jettas

VW MKV-A5 Golf/Jettas Discussions area for A5/MkV Jetta/Golf (2005/2006 PD and 2009 CR).

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Old March 28th, 2016, 17:32   #16
JETaah
 
Join Date: Jan 2001
Location: mi 48836
Fuel Economy: 53 max, 42 min, average 46
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I have picked up on another one of these situations on a 2010 JSW.
The fluid is leaking from a vent in the multi-pin connector. It is a tiny hole in the inner circle of the void where there are no pins. It looks like a small brass tube that is half-covered by the outer ring of plastic. (sorry, no paint program available to circle it ).

This picture is of a different mechatronic connector that is out of the car so that the connector vent is in plain view.



located about 3:15 o'clock on the inner circle of the void...

I pulled the tranny vent cap off and applied a little compressed air to force the issue. It weeps a bit of fluid when I do that. The pins do not have the leak.

The place that changed the fluid (118K) last sold the customer 6 quarts or liters...it does not specify in the work order but, probably liters but, who know how much of that was the final level of fluid.
I drained right about 4 liters of fluid from the trans just now and it is 34K later.

There does not seem to be any seepage around the case vent but the front of the cover and underneath the tranny is drizzled with fluid.

The dealer wanted to replace the mechatronic and maybe the harness at near $5000!!!

Has anyone ripped one of these trashed mech's apart?
It would be handy to know how the fluid got pushed into a gasket-sealed connector with enough force to leak out the back side onto the trans.
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Last edited by JETaah; March 31st, 2016 at 05:27.
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Old March 29th, 2016, 09:44   #17
JETaah
 
Join Date: Jan 2001
Location: mi 48836
Fuel Economy: 53 max, 42 min, average 46
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I assume that the connector vent is there to relieve air pressure as you engage the harness connector.
Makes me wonder...If the harness connector o-ring was really sealing, would the the fluid still ooze out of there?
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Old April 12th, 2016, 13:29   #18
wilber123
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Quote:
Originally Posted by thecause17 View Post
When I did my last oil change I noticed my car was leaking DSG fluid. After searching on here it seemed likely to be the filter o-ring so I went ahead and ordered one. I went to change it today and after removing the airbox it was apparent that wasn't the culprit. Here's a pic of where the fluid looks to be leaking from:



I cant figure out how to disconnect this connector. Can someone tell me how you do it? I'm not sure if I can even get the seal that's in that plug.

Have the same probleme with my dsg. Was wondering if you have found a fix for this probleme.cheers
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Old April 12th, 2016, 13:46   #19
edge130
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Would this be possibly covered by vw warranty extension on the DSG transmission?
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Old August 29th, 2018, 07:30   #20
JETaah
 
Join Date: Jan 2001
Location: mi 48836
Fuel Economy: 53 max, 42 min, average 46
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For the record...



I ran into this again today on a 2006 Jetta.
It also has codes for the following:



17106 - Transmission Output Speed Sensor (G195)
P0722 - 000 - No Signal - Intermittent
Freeze Frame:
Fault Status: 00100000
Fault Priority: 0
Fault Frequency: 255
Reset counter: 37
Mileage: 373867 km
Time Indication: 0

18201 - Transmission Output Speed Sensor 2 (G196)
P1793 - 000 - No Signal - Intermittent
Freeze Frame:
Fault Status: 00100000
Fault Priority: 0
Fault Frequency: 255
Reset counter: 37
Mileage: 373867 km
Time Indication: 0


It rather resembles the symptoms mentioned earlier with the engine free-revving through a shift until it figures out what to do about it.
I don't know that the fluid issue has anything to do with the speed sensor codes.


Any solutions out there yet?
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Old November 7th, 2019, 17:33   #21
phantom1260
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Just got back from the dealer and as per the pictures they provided I have a leak in the Mechatronic unit connector as well.

This occurred a couple of days after I had the DSG service completed at the dealer. They cleaned it up and reconnected it but on my way home from the dealer the transmission faulted out again and I was limited to 1 gear.

No error code yet this time but before I went to the dealer I pulled Code P0746. They provided me with the code P1814 at the dealership.

Was anybody ever able to solve this or am I looking at having to replace the entire Mechatronic over this? Is there a o-ring or any sealant that can be applied?




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Old November 8th, 2019, 08:00   #22
JETaah
 
Join Date: Jan 2001
Location: mi 48836
Fuel Economy: 53 max, 42 min, average 46
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Somehow I doubt that the fluid coming out of the connector is causing a fault for the codes. The mechatronic unit is submerged in the fluid...electrical connections and all.

It can make a mess, though.
I have witnessed this connector leakage on a few DSGs where the car runs completely fine. I think the code in my previous post was coincidental.
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Old November 14th, 2019, 12:28   #23
JFettig
 
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I've seen it a ton of times as well, our 2010 is leaking as well. I have a theory that the DSG fill procedure over-fills it compared to the original fill by a small amount. I'm not sure I've seen a low mile DSG trans leaking from that connector.
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Old November 19th, 2019, 07:29   #24
phantom1260
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Quote:
Originally Posted by JETaah View Post
Somehow I doubt that the fluid coming out of the connector is causing a fault for the codes. The mechatronic unit is submerged in the fluid...electrical connections and all.

It can make a mess, though.
I have witnessed this connector leakage on a few DSGs where the car runs completely fine. I think the code in my previous post was coincidental.
I'm leaning towards too much fluid leaking out and causing a fault in the N215 solenoid from the fluid being too low. This would make sense since the car was okay for 3 days of driving after the service. Then perhaps when the fluid got too low it started causing errors.

When I replaced the o-rings the connector area seemed to be dry on the outside where the o-rings sit. It was only leaking on the inside where the pins are.

I tested all the solenoids for resistance and none of them jumped out to be faulty.
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Old November 19th, 2019, 10:22   #25
Jbwoo
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Need to seal inside the connector where the pins are. Glue, JB weld, or a new connector. The o-ring obviously doesn't.
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Old November 23rd, 2019, 17:51   #26
phantom1260
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Would adding dialectic grease to the connector help?
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Old November 26th, 2019, 11:24   #27
Jbwoo
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No, the problem is fluid getting into the back of the connector and then between the connections. Dielectric grease is what I use for anti corrosion.
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