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2012 XC 90 won't start TCM issue

Help, Advice, Owners' Discussion and DIY Tutorials on Volvo XC90s. The XC90 proved to be very popular, and very good for Volvo's sales numbers, since its introduction in model year 2003 (North America).
206driver
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206driver

2012 XC 90 won't start TCM issue

Post by 206driver » Tue Apr 23, 2019 3:20 pm

I own an 2012 XC90 that is having starting issues. In November 2018 it would not start. Towed to dealer and they stated the Transmission Control Module was offline. It was rebooted and was back online and vehicle started and ran fine. Dealer note said they did not see any reason for TCM going offline, and if it happened again the TCM may need to be replaced. Today it would not start (totally dead, with good battery). Has anyone had this issue and did you replace the TCM? Location of TCM in this vehicle so I can start looking to replace it?



precopster
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Re: 2012 XC 90 won't start TCM issue

Post by precopster » Wed Apr 24, 2019 1:39 am

In engine bay next to coolant bottle under a plastic cover. The ECM is the module next to it.

Did they clean, disassemble the casing to view the board and look for corrosion? Have you been washing the engine? Way too many connectors in hard to reach places to justify wetting the engine bay, even if excessively greasy.


Current cars:2002 XC70, 2001 V70 T5, 2006 XC90 2.5T, VW Transporter 2.5TDI

www.precisioncarmodules.com.

wanderdĂĽne
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Re: 2012 XC 90 won't start TCM issue

Post by wanderdĂĽne » Wed Apr 24, 2019 10:34 am

You can't just replace the TCM, it needs to be programmed to the car. You can either go through a service like XeMODeX or through a dealer or indy with dealer level tools. I don't know if you can DIY with VIDA-dice, maybe if you have a OEM legit setup and can get the programming from Volvo.



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RickHaleParker
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Re: 2012 XC 90 won't start TCM issue

Post by RickHaleParker » Wed Apr 24, 2019 12:28 pm

The 2012 XC90 has the TF-80SC transmission. The TF-80SC TCM is mounted on top of the TF-80SC.

If you change the TCM on a TF-80SC you will need a software reload at a Volvo dealer or you will need to hire somebody to clone the software from the old to the new TCM. From what I can see Xemodex does not offer a cloning for this TCM. A Volvo dealer might be your only option.

Check the wiring and connectors, dirty, opens and shorts before committing to a new TCM. The fact that the dealer could not find anything strongly suggest an intermittence problem. Most common cause of a electronics intermittence problem ... wiring.
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206driver


Platform: P80 1998 C70, B5234T3, AW50-42, Bosch Motronic 4.4, Special Edition package, Plant: Uddevalla Sweden.

Platform: X40 (Nedcar) 2003 S40, B4204T3, AW55-50/51SN, Siemens EMS 2000. Plant: Born Netherlands.

Platform P2 2005 XC90 T6 Executive, B6294T, 4T65 AWD, Bosch Motronic 7.0, Plant Torslanda Sweden.
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1997 S90, B6304S, AW30-42, Bosch Motronic 4.4 - Sold

206driver
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206driver

Re: 2012 XC 90 won't start TCM issue

Post by 206driver » Wed Apr 24, 2019 8:14 pm

Thanks, will check wiring and connectors for issues before going for replacement. Will have to repair this as it’s been a great car.



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Re: 2012 XC 90 won't start TCM issue

Post by xHeart » Mon Apr 29, 2019 7:50 am

206driver wrote: ↑
Tue Apr 23, 2019 3:20 pm
I own an 2012 XC90 that is having starting issues. In November 2018 it would not start. Towed to dealer and they stated the Transmission Control Module was offline. It was rebooted and was back online and vehicle started and ran fine. Dealer note said they did not see any reason for TCM going offline, and if it happened again the TCM may need to be replaced. Today it would not start (totally dead, with good battery). Has anyone had this issue and did you replace the TCM? Location of TCM in this vehicle so I can start looking to replace it?
If you're not a DIYer AND your XC90 is out of manufacturer's warranty then watch your pocketbook, trade it off for newer.


--
Golden Retriever | 2014D VIDA DiCE | 2013A XC90 +140mi/225km | 2001 V70XC 1st Owner +190mi/ +305km | 1997 Volvo 850 NA 1st Owner +180mi/ +289km
Past: German Shepherd | 1989 Volvo 740 GL | 1979 Volvo 240

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Re: 2012 XC 90 won't start TCM issue

Post by precopster » Mon Apr 29, 2019 10:20 pm

I would start by unplugging all TCM connectors and cleaning with contact spray then plug and re-plug to scrape off corrosion. The same could be done at CEM. I would employ an auto electrician for this job if you are not handy with cars. Mechanics to be avoided for this one!


Current cars:2002 XC70, 2001 V70 T5, 2006 XC90 2.5T, VW Transporter 2.5TDI

www.precisioncarmodules.com.

206driver
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Re: 2012 XC 90 won't start TCM issue

Post by 206driver » Tue Apr 30, 2019 6:42 pm

Thanks for the advice on cleaning, checking wiring etc which I plan to follow first. I have a fair amount of diy repair experience, but first foray into Volvo. If I end up having to put in a new TCM, it looks like the procedure will require tool 9997262. Fortunately this is an extra car for me and I can take my time. Have located someone who can come to my location to reset TCM, instead of a tow to a shop. Will let everyone know how this comes out



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