S40 V40: CEM Wiring/Repair Information

[gatos]

Try posting in the S60 section:
http://www.volvoforums.org.uk/forumdisplay.php?f=19

I am sure someone there will be able to help you. This is the S40/V40 section.

[stuhandy]

Hi there, My CEM has given up the ghost so I will be replacing it. If I use another CEM does it need registering to the car or is it plug and play? Regards Stu.

[gatos]

The CEM should fit on the car as it is with no need for programming. However, certain functions might need programming, ie fog light and rear wiper.

However, if the replacement CEM came from a car with fog lights on it, then you will not have to program it for fog lights. If you have a V40 and the replacement CEM comes from an S40, you will need to program the rear wipers to the CEM. However a V40 CEM will work on an S$) as is.

What car have you got? I have an S40 CEM and Siamblue has a V40 CEM, both with fog lights, so no programming will be needed.

[stuhandy]

Gatos, thanks for the reply. I have a 2002 v40 diesel, fog lights incl.

If I need to programme the new CEM, how is this done?

Iam new to this website

[stuhandy]

Thanks Gatos, I think I would like to keep this as simple as poss. Do you know if Siamblue still has there CEM and would they part with it?

[gatos]

Originally Posted by stuhandy

Gatos, thanks for the reply. I have a 2002 v40 diesel, fog lights incl.

If I need to programme the new CEM, how is this done?

Iam new to this website

In that case you will need a CEM from a V40 with fog lights and you will not need any further programming at the dealers.

Originally Posted by stuhandy

Thanks Gatos, I think I would like to keep this as simple as poss. Do you know if Siamblue still has there CEM and would they part with it?

Yes he does. I actually have his one at my house house. I will ask him how much he wants for it and he will either reply here or send you a pm

[baldmosher]

Awww, shucks, bad timing.

The new stalk didn't work gatos, so it looks like my CEM after all. Anyone know where to locate the relay for the front windscreen wipers? I notice it's not mentioned on the diagram...?

[gatos]

It is programmed in the CEM, so in one of the relays. So even if you replcaced a relay, you would still have to reprogram it.

I know Siamblue has contacted stuhandy, but I am not sure if they have gone ahead. If not, then you can drop an email to Siamblue about the CEM.

Or if you can't get hold of one, I can lend you a spare CEM I have for an S40 and you can use it temporarily. You will be able to use the front wipers, but not the rear one.

What makes you think that it was the wiper stalk first and now the CEM? Have you checked if the wiper motor is working first? Have you checked to see if a signal goes through to the wiper mechanism? It is better to start with the easiest and cheapest option, before you start spending money on parts you don't need.

[baldmosher]

I have intermittent wipe. Just no single/on/fast/wash function. Washer motor works off the car.

What else could it be?

[gatos]

Oh ok. Then that would probably be the CEM. PM Siamblue if you want and see what he says about his CEM. He has one move CEM but he might need it to transfer the Xenon lights from one car to the other. We are both not sure if the CEM comes into play to the Xenon self levelling, so we will be finding out in the near future. Then he will have one more CEM available.