S40 V40: CEM Wiring/Repair Information

[gatos]

I would remove your chassis number now, as this is a public forum. Or, change it to something like 952**5

It would appear that your car should have the 30621305 CEM. Let me check VIDA and I will see what comes up. In the meantime, change your Chassis number

[gatos]

Checked VIDA and could not find any more info. YMaybe you could call your local dealership and ask them what part it should be. They have a much more detailed database and they will be able to tell you the correct part number.

If you have the correct CEM, then the only other thing that might have happened, is that the previous owner replaced the indicator stalk which does not match the CEM and would also explain your problem

[Clan]

Originally Posted by kirkwallcity

Hi Gatos,

I checked the part this morning and it does have number 30638708. Is there any possibility that it should be one of the others? Alternatively, is it possible that it's a relay? I hear the relay clicking away.

Cheers

Bob

yes it should be one of the others , as your chassis number is in the 900000 range you should have 30621305 ( chassis 800000 - 026445 )

30638708 is for the very last S/V40s from chassis number 026445 thats 2003 and 2004 models ..

remember i said the chassis number went back to zero around 2002

[kirkwallcity]

Thanks for all the help folks. A bit of a nightmare. I'll speak to my local dealer (100 miles away) to double check.
Bob

[gatos]

Originally Posted by kirkwallcity

Thanks for all the help folks. A bit of a nightmare. I'll speak to my local dealer (100 miles away) to double check.
Bob

A quick call should do. Have your VIN handy

[dwin]

Is it possible to replace just the headlight relay in the CEM? I opened the CEM up and it looks like the relay is soldered in place, but has a little gap between it and the circuit board. Is it soldered or does it connect to something that is soldered in place? Any help would save $$$!

[gatos]

This is what this post was originally for. If your soldering skills are good, you should have no problems removing it and putting a new one on. See the first few posts

[Clan]

Originally Posted by dwin

Is it possible to replace just the headlight relay in the CEM? I opened the CEM up and it looks like the relay is soldered in place, but has a little gap between it and the circuit board. Is it soldered or does it connect to something that is soldered in place? Any help would save $$$!

yes it is possible if you can locate the same type relay , but what i would do is remove the relay and extend the two coil wires and two contact wires outside the casing and connect them to a more substantial standard 40 Amp relay and bond it to the case of the CEM ...

[keefer]

Thanks for the info and I now know I need the 30638708 version CEM to get my Volvo V40 D S through the MOT next month. I currently have the wrong CEM fitted and have lights and wiper issues.

Anyone got one that you might consider selling to me please?

Many thanks

Keith

[gatos]

Originally Posted by keefer

Thanks for the info and I now know I need the 30638708 version CEM to get my Volvo V40 D S through the MOT next month. I currently have the wrong CEM fitted and have lights and wiper issues.

Anyone got one that you might consider selling to me please?

Many thanks

Keith

I do have a spare one and I can program it for rear wiper and fogs.

What is your problem/symptoms exactly?