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C30 / S40 & V50 '04-'12 / C70 '06-'13 General Forum for the P1-platform C30 / S40 / V50 / C70 models |
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Permanent Solution to CEM issuesViews : 717 Replies : 8Users Viewing This Thread : |
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Aug 8th, 2019, 18:39 | #1 |
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Last Online: Jul 5th, 2023 21:11
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Location: Lybster
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Permanent Solution to CEM issues
Is there a permanent solution to the electrical issues that seem to plague early P1 cars?
After being stranded due to ‘Brake Failure stop immediately”, Cleaning the CEM, being fine for 6 months then getting stranded again, wiggling the connections to the CEM, being fine for a week, getting the “anti-skid failure” message that precedes complete stranding, wiggling the CEM and being fine again I’m starting to get fed up driving a car that could strand me at the side of the road at any time. Is there a permanent fix for a dodgy CEM or am I just going to have to dismantle everything and clean it every couple of months? If that’s the case then the car really isn’t fit for purpose as its going to have to be used for commuting soon. |
Aug 8th, 2019, 19:07 | #2 |
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Last Online: Mar 20th, 2024 18:26
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Yes there is a permanent fix.
If your CEM is unreliable, replace it with a brand new one. That will solve many reliability issues. Of course, such a fix comes at a price - but it is the fastest and simplest way to resolve the issue and ensure reliability.
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Aug 8th, 2019, 20:57 | #3 |
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Thanks, I didn’t realise it was as simple as that, most online advice stops after “clean the CEM with a nylon brush”. Has anybody got any experience of doing this? Are reconditioned CEMs worth looking at (the car’s only worth £2k) or should I go new?
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Aug 8th, 2019, 21:10 | #4 | |
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Quote:
That's because brand new has less operational hours on it than old. You can clean and try and recondition CEMs. You may be successful. Or may not. New parts come with guarantees and reliability but always come at a cost. And cost vs effort vs gains is a very personal decision that you make based on your value of the car, your personal financial situation, and the effort you want to invest.
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XC90 R-Design MY2009, Black Sapphire Metallic. HP-Sound, RSE, Nav, Tel, ParkingCam, BLIS, ParkingHeater, RestHeat, Removable Towbar, Summer: CRATUS 20x8 on Pirelli Scorpion Zeros 255/45, Winter: NEPTUNE 17x7 on Continental WinterContact 4x4 235/65. |
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Aug 9th, 2019, 14:50 | #5 | |
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Last Online: Mar 14th, 2024 16:24
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Quote:
I spoke to a family member at Volvo recently when I had this problem and 99% of the time it's never the CEM that's at fault, it's the terminals. The CEM's are actually (electronics wise) very reliable. The fact you have to keep jiggling the connections is an easy sign that this is the problem. Volvo sell a terminal pack to strip and replace the wiring loom. They degrade over time and don't fit so well, hence intermittent issues. Don't waste £700+ at Volvo for a new CEM, you'll be right back where you started since that's not the problem!
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2006 Volvo S40 T5 SE Sport
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Aug 9th, 2019, 15:02 | #6 |
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Wow, that's what I get for trying to help people? Well, **** *** **
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Aug 9th, 2019, 15:06 | #7 |
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If buy ' helping people' you mean pointing them towards the dealer with their wallet wide open for unnecessary expensive 'fixes' that will only put them hugely out of pocket with no fix then what did you expect?
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2006 Volvo S40 T5 SE Sport
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Aug 9th, 2019, 15:18 | #8 | |
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Last Online: Mar 26th, 2024 16:05
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Quote:
In extreme cases, as it happened, people had to replace CEM because of physical damage etc but even then I never heard of anybody going to dealership to do so especially if its gonna cost half of what your car is worth. You get a decent CEM from another donor car for pennies and send it to UK company to clone electronics for fraction of a price of new one. Agreed with FM on this one - dealership route especially in case of our double-digit old cars makes no sense in this case. Same story with alternators and other parts, its just not worth doing some of the jobs in stealerships...
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Aug 31st, 2019, 11:04 | #9 |
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Same issues
How much is the wiring loom?
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