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Transmission codes

Help, Advice and DIY Tutorials on Volvo's P80 platform cars -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

1992 - 1997 850, including 850 R, 850 T-5R, 850 T-5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70

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hausmeister
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Year and Model: 1995 850T5-R
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Re: Transmission codes

Post by hausmeister »

Problem seems solved. New used TCU solved it.
850 T5-R '95 auto Image

yanga001
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Year and Model: 98/99/00 v/s70’s
Location: Ontario
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Post by yanga001 »

hausmeister wrote: 24 Aug 2022, 15:02 Problem seems solved. New used TCU solved it.
This is the second time i know of that a TCU replacement cleared transmission codes. I had it happen on a 98 s70 before which presented with the flashing arrow of death. Glad its resolved!
1998 S70 N/A Auto (Parts car)(planned to be harvested)
1998 V70 N/A Auto New full restoration project (Water pump thrown at 404K Km)
1998 V70 N/A Auto (Workhorse) (Tree to driver B pillar :( )
1999 S70 T5 Auto(Project) (planned to be fixed)
2000 S70 SE M Learning platform (planned to be driven one day)
2008 S60 2.5T Auto (Sold)
2012 Honda Pilot AWD Touring (Daily)

scot850
Posts: 14881
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Year and Model: 2000 V70 R
Location: Calgary, Alberta, Canada
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Post by scot850 »

Wow, glad you got lucky on that one!

Neil.
2006 V70 2.5T AWD Polestar tune
2000 V70 R - still being an endless PITA
2006 XC70 - Our son now has this and still parked in our garage
2003 Toyota 4Runner V8 Limited
2015 Kia Sportage EX-L - Sold
1993 850 GLT -Sold
1998 V70 XC - Sold
1997 Volvo 850 SE NA - Went to niece in California - Sold
2000 V70 SE NA - Sold

hausmeister
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Joined: 22 July 2006
Year and Model: 1995 850T5-R
Location: Austria
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Post by hausmeister »

Very strange when logic actually fixes something :D
bought a 2nd one as spare, so long as they are cheap.
I think mine already had issues for some years, as per the points I listed that are working much better now.
850 T5-R '95 auto Image

scot850
Posts: 14881
Joined: 5 April 2010
Year and Model: 2000 V70 R
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Post by scot850 »

Using logic will never work! :lol: :lol:

It is like common sense. Very rare commodity! :D

Neil.
2006 V70 2.5T AWD Polestar tune
2000 V70 R - still being an endless PITA
2006 XC70 - Our son now has this and still parked in our garage
2003 Toyota 4Runner V8 Limited
2015 Kia Sportage EX-L - Sold
1993 850 GLT -Sold
1998 V70 XC - Sold
1997 Volvo 850 SE NA - Went to niece in California - Sold
2000 V70 SE NA - Sold

scot850
Posts: 14881
Joined: 5 April 2010
Year and Model: 2000 V70 R
Location: Calgary, Alberta, Canada
Has thanked: 1846 times
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Post by scot850 »

Using logic will never work! :lol: :lol:

It is like common sense. Very rare commodity! :D

Neil.
2006 V70 2.5T AWD Polestar tune
2000 V70 R - still being an endless PITA
2006 XC70 - Our son now has this and still parked in our garage
2003 Toyota 4Runner V8 Limited
2015 Kia Sportage EX-L - Sold
1993 850 GLT -Sold
1998 V70 XC - Sold
1997 Volvo 850 SE NA - Went to niece in California - Sold
2000 V70 SE NA - Sold

hausmeister
Posts: 572
Joined: 22 July 2006
Year and Model: 1995 850T5-R
Location: Austria
Has thanked: 250 times
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Post by hausmeister »

Today I had time to take my faulty TCU apart. I just wanted to see if there is anything obvious.
The only thing I can see is the one big green cap (c602 5.5v 0.022F) might be bulging a little bit. Everything else looks fine to me, but doing anything else than visual inspection is beyond me. Thought maybe someone might be interested in the pics or might have suggestion on how to fix it.

Maybe I'll try and replace all the caps on it... just for fun. It did work fine other than all the TPS related issues.
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850 T5-R '95 auto Image

scot850
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Year and Model: 2000 V70 R
Location: Calgary, Alberta, Canada
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Post by scot850 »

On a 2000 V70 base I had, I had TCU errors but the issue was corroded/oxidised pins on the TCU. The dealer figured it out after I had spent hours trying to sort it. I could not get Vida to talk to the TCU which should have been a clear pointer to me! Having said that the car still ran fine in my case, it just liked to throw random TCU codes and Engine check light and ABS codes as well.

Neil.
2006 V70 2.5T AWD Polestar tune
2000 V70 R - still being an endless PITA
2006 XC70 - Our son now has this and still parked in our garage
2003 Toyota 4Runner V8 Limited
2015 Kia Sportage EX-L - Sold
1993 850 GLT -Sold
1998 V70 XC - Sold
1997 Volvo 850 SE NA - Went to niece in California - Sold
2000 V70 SE NA - Sold

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misha
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Year and Model: '97 850 2.5 20v
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Post by misha »

That TCU is from '93 model.
T93280138
Since you have a '95 it should at least have T94 or T95.
'97 850 2.5 20v / fully equipped / Motronic 4.4 from the factory / upgraded with S,V,C,XC70 instrument cluster / polar white wagon
History of Volvos in the family:
'71 144 S
'73 144 De Luxe
'78 244 DL
'78 244 DL
'79 244 GLE
'85 340 GLS

hausmeister
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Year and Model: 1995 850T5-R
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Post by hausmeister »

I am not familiar with the TCUs. But, when I searched for the model number (P3545864) it seemed to be correct for the T5R. The replacement I got I think is also a T93 and it works so far. I am not saying you are wrong, but does it even matter?
850 T5-R '95 auto Image

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