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Coco50448
Samba Member
Joined: December 28, 2021
Posts: 2
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 Posted: Tue Dec 28, 2021 10:25 am Post subject: Transmission stuck in 3rd |
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Hi, I’ve got a 2002 beetle with the 1.9tdi and the 01m transmission. And as of now it is stuck in 3rd gear, (can shift it manually up to 3rd) but I can clear the code it has with a snap-on scanner and it will shift perfectly normal. Soon as I shut it off and restart it, the code comes back and it’s stuck in 3rd again, which I understand is limp mode. The code it throws is “65535 checksum error - ecu defective unknown subcode.” Anyways I tore the dash apart to check the tcm and ecu and found I had a really bad mouse problem. While inspecting wires I found on the back of the tcm plug there was 2 little white wires the looked cut but they didn’t have a place they went into the plug itself. So I’m not sure if they are suppose to be cut or if they are suppose to be connected to something. Hoping someone knows. Thanks.
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beanlover
Samba Member
Joined: December 18, 2018
Posts: 370
Location: PA
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| Posted: Tue Dec 28, 2021 12:52 pm Post subject: Re: Transmission stuck in 3rd |
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The white wires don't really look "nibbled on" (I assume that's what you meant by "mouse problem") but cut. Do you see what they would have connected to?
Also...this forum does say "'68 and up" but it primarily focuses on the "Classic Beetle" and not the new beetle...which is probably why there is a lack of replies. The classic beetle doesn't have any computer stuff so that's kinda outside the knowledge of what this forum normally addresses...but that doesn't mean we can't try to help! Let me know the answers to the questions above and let's see where we can get you.
Also...are you able to clean the contacts of all of those wires? That could cause a connection issue where it thinks I can't figure out what's going on (I would think...I do not know). |
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Coco50448
Samba Member
Joined: December 28, 2021
Posts: 2
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| Posted: Tue Dec 28, 2021 1:30 pm Post subject: Re: Transmission stuck in 3rd |
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| beanlover wrote: |
The white wires don't really look "nibbled on" (I assume that's what you meant by "mouse problem") but cut. Do you see what they would have connected to?
Also...this forum does say "'68 and up" but it primarily focuses on the "Classic Beetle" and not the new beetle...which is probably why there is a lack of replies. The classic beetle doesn't have any computer stuff so that's kinda outside the knowledge of what this forum normally addresses...but that doesn't mean we can't try to help! Let me know the answers to the questions above and let's see where we can get you.
Also...are you able to clean the contacts of all of those wires? That could cause a connection issue where it thinks I can't figure out what's going on (I would think...I do not know). |
Any other forums you’d recommend then? Also I agree the wires do
Not look nibbled on and the plug has no matching wires or empty holes for that matter. I just did know if they were connect together or not. And I sprayed some maf cleaner in all the plugs and such to clean them. Still no help. Cleared all the grounds in the dash, no help. Kinda at a lost here. |
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beanlover
Samba Member
Joined: December 18, 2018
Posts: 370
Location: PA
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| Posted: Tue Dec 28, 2021 2:18 pm Post subject: Re: Transmission stuck in 3rd |
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I personally am not aware of any New Beetle forums but there is a "Water Cooled" section here on thesamba: https://www.thesamba.com/vw/forum/viewforum.php?f=11
Hopefully they can give some help.
If I were you I'd try to find a junkyard ECU and swap it out to see if that makes a difference...trusting the reader findings of "defective" and see where that takes you. Sorry I can't be of more help. |
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EverettB 
Administrator
Joined: April 11, 2000
Posts: 69838
Location: Phoenix Metro
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Butcher
Samba Member
Joined: December 05, 2015
Posts: 1285
Location: Right Here
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| Posted: Wed Dec 29, 2021 9:05 am Post subject: Re: Transmission stuck in 3rd |
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| A good wiring diagram would help you locate the purpose of those wires. |
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oasis
Samba Member
Joined: December 12, 2002
Posts: 2168
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| Posted: Thu Dec 30, 2021 11:16 am Post subject: Re: Transmission stuck in 3rd |
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| Coco50448 wrote: |
| Any other forums you’d recommend then? |
newbeetle.org
Very nice forum. 
_________________
Now: 2003 New Beetle Turbo S / 1990 Single Cab Transporter / 2014 Tiguan R-Line 4motion / 2013 Tiguan S / 2002 Golf GLS TDI
Past: 1974 Thing Acapulco / 2009 Eos Komfort / 1997 Jetta GT / 2002 Cabrio GLX / 2002 Passat GLS / 1971 Super Beetle / 1993 EuroVan MV Westfalia / 1981 Pickup LX / 1985 Vanagon / 1986 Jetta GLI |
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NY thing
Samba Member
Joined: March 23, 2010
Posts: 100
Location: Queens New York
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| Posted: Sat Jan 01, 2022 4:08 pm Post subject: Re: Transmission stuck in 3rd |
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| I've seen a hose inside the 1.9TDI ECU that connects to the MAP sensor dry rot and crack, giving the defective ECU code. It throws the computer into limp mode. Might be worth it to pull out the ECU, open it up and check. |
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ach60
Samba Member
Joined: May 14, 2001
Posts: 4139
Location: Santa Maria
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