Antiskid + Brake failure stop safely - Error expert needed!

[pdig]

Danc,

Please see this link for details which may give helpful info.

http://www.volvoforums.org.uk/showth...ighlight=brake

[danc]

CEM inspected yesterday, no apparent signs of corrosion, all connections look good according to the Volvo specialist (who incidentally have been really helpful from the start).

That's frustrating - I was hoping for a clearly burnt CEM to confirm the source of the problem.

Options now include:

1. a CEM software upgrade (a long shot)
2. disconnecting the non-Volvo and not-working front parking sensor kit which is situated next to the CEM (a really long shot)
3. do a CEM replacement (circa £900 all in)
4. sell it on as is and be done with it

I've opted for 2) and 3), which will go ahead tomorrow.

If that combination doesn't do it, I will not be happy.

[danc]

New CEM installed and software updated.

On the drive back from the garage, I got the "anti skid" errors / limp mode back.

Presumably the same ones as before: http://www.volvoforums.org.uk/attach...5&d=1404562609

Having just completely wasted £900+, I'm at my wit's end with this car.

Please, can someone offer some advice.

[Danielpsmith]

Sounds a long shot but can't the reluctor rings on the wheels cause anti skid message or the brake message not sure how true it is remember reading on here somewhere about it hope you can get it sorted

Daniel

[SonyVaio]

Originally Posted by danc

Having just completely wasted £900+, I'm at my wit's end with this car.

Please, can someone offer some advice.

Take it straight back and have them re-install your original CEM and tell them you paid for a service which has not been provided. You have paid them for a proper diagnosis and repair, this has obviously not been conducted so I'd say obtain a refund.

You pay them to do a proper job not just guess and replace parts at your expense.

[bobdabuilda]

I know how you feel, there's been a few times I've considered reaching for the matchbox and a petrol can with this car.

[danc]

Thanks for the comments guys.

Danielpsmith - appreciate the suggestion, I heard the same thing and got them checked at the start.

SonyVaio - if it was stealership, yes definitely. However, the independent Volvo garage were completely upfront about the risks (i.e. that it might not fix the problem) but from all I've read over the past few weeks, the CEM seemed the most likely culprit. Being an intermittent problem doesn't help. Took a chance, didn't pay off unfortunately.

bobdabuilda - funnily enough, the thought had crossed my mind!

What next? Maybe the DEM?

The error log shows a DEM E000 and a CEM 1A64 which both seem related to the diff.

Does anyone which fuse is associated with the DEM in the rear fuse box? If I can disconnect that and not get limp mode, that would be a good start. I've got a 2006 XC90.

[SonyVaio]

Just off out now but will reply later if no one else has by then.

[Clan]

Originally Posted by danc

Thanks for the comments guys.

Danielpsmith - appreciate the suggestion, I heard the same thing and got them checked at the start.

SonyVaio - if it was stealership, yes definitely. However, the independent Volvo garage were completely upfront about the risks (i.e. that it might not fix the problem) but from all I've read over the past few weeks, the CEM seemed the most likely culprit. Being an intermittent problem doesn't help. Took a chance, didn't pay off unfortunately.

bobdabuilda - funnily enough, the thought had crossed my mind!

What next? Maybe the DEM?

The error log shows a DEM E000 and a CEM 1A64 which both seem related to the diff.

Does anyone which fuse is associated with the DEM in the rear fuse box? If I can disconnect that and not get limp mode, that would be a good start. I've got a 2006 XC90.

a DEM is £1200 , take it to someone who knows what they are doing , the dealer is the only one with the knowledge and back up of volvo and the one you can depend on to diagnose the fault and change just the part needed .

If you had a Ferrari would you take it anywhere other than a dealer ? It is the same thing , cars are now very specialised whether it is a volvo or a smart car and sometimes you need the manufacturers help through their dealers .

Is your car is a 2005-6 model ? If so i would fit the CEM waterproofing kit , don't want to see that CEM ruined in the future !

[danc]

Fair point Clan, can't really argue with that.

In terms of the DEM fuse, it's number 23 in the REM in the boot.

...found a useful reference for XC90 fuses.

I removed it this morning and immediately got the familiar "Anti skid service required" message - expected to see something.

I'll drive it round like this for a while, if I don't get limp mode and the other symptoms (see first post in this thread), I'll know I'm probably looking at a £1200 bill for a new DEM.

Clan - I've got the late 2006 185 bhp model which has the CEM waterproofing sorted. Incidentally, I've got a perfectly good second-hand CEM sitting in the boot if anyone wants to buy it for spares!