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Volvo SCL replacement not working after programming

Simon Diagnostician United Kingdom Posted   Latest   Edited  
Question
Resolved
Programming
2010 Volvo C70 2.5L 5-spd
No Crank / No Start

Hoping someone may have seen this problem before…

Car has a faulty steering lock but is working currently, a new SCL has been installed. I have done an SCL reload, official VIDA account, original DICE. The procedure completes successfully. However after completion the car will not start and the steering lock does not operate when removing or inserting the key. There is obviously an SCL not programmed fault code stored which will delete but returns again after cycling the ignition. Reconnecting the original faulty SCL and the car starts fine. The dealer has supplied another SCL but again the same thing happens. I have programmed these before without a problem so I am scratching my head now. I have also tried VDASH SCL pairing but again the car will not start after the procedure completes. I am leaning towards a faulty CEM but it's an expensive part to replace on a hunch.

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John Diagnostician
Missouri
John
   

CEM=Central Electronic Module SCL=Steering Column Lock DESCRIPTION: Model year 2009 and newer P1 vehicles are not built with a functional SCL. There have however been cases of CEM DTC 6C44 (Steering column lock module, faulty signal) being set. The DTC is set at: - Key-off on keyless vehicles (switching the ignition to position 0) - Key-out on non-keyless vehicles (removing the key after…

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Mike Owner/Technician
Florida
Mike
 

I did one last week or two on an S40 with no problems. It took the software and started fine after. I find it odd that yours starts ok with the old unit but not the new one after sw. What was the original reason for replacement? Did you use …?

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Simon Diagnostician
United Kingdom
Simon Update
 

…Mike, I too have done these before and never had a problem, … is not relevant to this vehicle, the SCL reload is … @John, I thought you had hit the nail on the head, the CEM DTC 6C44 is present and returns after cycling the ignition. There was a CEM reload and upgrade available and both are 458kB so I have done the CEM upgrade and done the SCL reload again, I am still having…

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Mike Owner/Technician
Florida
Mike
 

… Should be the part number for the scl, not the reload.

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Simon Diagnostician
United Kingdom
Simon
 

Sorry Mike, of course it is, yes that's the part number of both the new SCL's that I have attempted to program. The original part number is …, the dealer confirms the original part number does supersede to the new number and they have checked the SCL reload part number is still correct for either part number.

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Mike Owner/Technician
Florida
Mike
 

It is unfortunate but I would be looking at the CEM next. The SCL has three wires. Power Ground and LIN. It’s simple. One thing I noticed was the SCU / ignition switch also is on the LIN. Maybe take a look at the LIN with a scope and see if your wave form looks the same with the new and old SCL. SCUs have been prone to failure but I haven’t seen one cause a LIN failure. Verify the CEM is sending…

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John Diagnostician
Missouri
John
   

That info was from Bulletin TJ 25287. I only do 4 or 5 Volvo programming events a year here. My question would be, is a CEM Upgrade equal to a CEM Reload in the case of this logic issue? Maybe I mis-read your post, and CEM reload was performed.

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Larry Owner/Technician
California
Larry
 

I think you might have a bad ignition switch… they are on the lin together..

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Mats Technical Support Specialist
Sweden
Mats
 

Hi ! Is it a used SCL ? If not se attached file

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Bryan Diagnostician
New York
Bryan
 

What shows up under hardware changes?

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Simon Diagnostician
United Kingdom
Simon Resolution
 

Thanks everyone for the input, not yet resolved, however I have now been informed the ignition switch has been replaced prior to the vehicle coming to me. I didn't diagnose the original fault, that was done by a “Volvo Specialist” but they don't have programming capabilities. I will update when I have a conclusion. Sorry it has been some time. The issue has now been resolved by cloning and…

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NASTF is a cooperative effort among the automotive service industry, the equipment and tool industry and OEMs to ensure that independent automotive service professionals have the information, training, and tools needed to properly diagnose and repair today’s high tech vehicles. Corporate Partner