C30 Electrics : - Where is ECU on C30 SD Drive 2009

Keith Handley · Mar 6th, 2020, 11:45

Good Day, This is a stupid question and I cannot believe I am asking. Where is the ECU on this vehicle? I've Googled, under front right wheel arch !! No its not there, engine compartment next to power steering, no its not there!
This is my daughters car, it failed whilst out and allsorts showed up on the RAC readout of ECU. I got car back and had all 'faults' deleted and started anew.
My daughter borrowed my car and I drove her C30. Drove fine, then suddenly wipers started and would not stop, indicators stopped working? I stopped car, went to supermarket, restarted, all ok again ? I took all fuses out, renewed, cleaned. Drove again, ok for a week then drove to work, 11 pm pickup car and dead as a dodo !! Next day went back put in key and fine ??
Left it with garage for a week, they said all ok until day i went to pickup, and same prob, wipers etc, they said ECU, but they did not want to do it.
So after all this I decided to remove ECU and send for testing, but where is it please??

Petey80 · Mar 6th, 2020, 11:54

The ECU is located in the passenger side wheel arch, under the plastic arch liner.

There is also the CEM fuse box located under the glove box in the passenger footwell.

Either of these can cause major electrical faults and error codes.

Keith Handley · Mar 6th, 2020, 12:07

Thank you, I will look go look there, many thanks

Keith Handley · Mar 6th, 2020, 17:08

Well as you can see, the ECU has had water ingress to at least the outside. No gasket around the outside of the containing plastic box? I'll send away and have it tested.

Bendolfc · Mar 6th, 2020, 17:10

Your issues sound more CEM related than ECU to be fair.

Keith Handley · Mar 6th, 2020, 20:29

CEM ?? I'm open to any ideas and advice, I don't know the abbreviation CEM,
Thanks in advance

MDS40 · Mar 8th, 2020, 16:57

CEM Central electronic module

I had multiple faults including wipers going off at random.
The module on the S40 is below the glovebox.
Probably the same on the C30.

Disconnect the battery then drop open the cem and use contact cleaner on all plugs and connectors including the fuses, i used a toothbrush to get into the sockets.

Mar 6th, 2020, 11:45	#1
Keith Handley New Member Last Online: Oct 19th, 2020 10:16 Join Date: Mar 2020 Location: Goole	Where is ECU on C30 SD Drive 2009 Good Day, This is a stupid question and I cannot believe I am asking. Where is the ECU on this vehicle? I've Googled, under front right wheel arch !! No its not there, engine compartment next to power steering, no its not there! This is my daughters car, it failed whilst out and allsorts showed up on the RAC readout of ECU. I got car back and had all 'faults' deleted and started anew. My daughter borrowed my car and I drove her C30. Drove fine, then suddenly wipers started and would not stop, indicators stopped working? I stopped car, went to supermarket, restarted, all ok again ? I took all fuses out, renewed, cleaned. Drove again, ok for a week then drove to work, 11 pm pickup car and dead as a dodo !! Next day went back put in key and fine ?? Left it with garage for a week, they said all ok until day i went to pickup, and same prob, wipers etc, they said ECU, but they did not want to do it. So after all this I decided to remove ECU and send for testing, but where is it please??

Mar 6th, 2020, 11:54	#2
Petey80 Premier Member Last Online: Apr 14th, 2024 21:03 Join Date: Feb 2017 Location: North East, Teesside	The ECU is located in the passenger side wheel arch, under the plastic arch liner. There is also the CEM fuse box located under the glove box in the passenger footwell. Either of these can cause major electrical faults and error codes. __________________ Thread V40 T2 R-Design - https://www.volvoforums.org.uk/showt...56#post2901756 Thread V50 D2 R-Design - https://www.volvoforums.org.uk/showthread.php?t=264890 - CRASHED

Mar 6th, 2020, 12:07	#3
Keith Handley New Member Last Online: Oct 19th, 2020 10:16 Join Date: Mar 2020 Location: Goole	C30 ecu Thank you, I will look go look there, many thanks

Mar 6th, 2020, 20:29	#6
Keith Handley New Member Last Online: Oct 19th, 2020 10:16 Join Date: Mar 2020 Location: Goole	C30 ecu CEM ?? I'm open to any ideas and advice, I don't know the abbreviation CEM, Thanks in advance

Mar 8th, 2020, 16:57	#7
MDS40 Senior Member Last Online: Apr 1st, 2024 17:55 Join Date: Sep 2017 Location: Berkshire	CEM Central electronic module I had multiple faults including wipers going off at random. The module on the S40 is below the glovebox. Probably the same on the C30. Disconnect the battery then drop open the cem and use contact cleaner on all plugs and connectors including the fuses, i used a toothbrush to get into the sockets. __________________ 2006 S40 2.4 SE Auto. Ruby Red. 83K Miles Some previous cars include: Jaguar x type: Mazda 6 : Mazda 626: Ford Sierra 2.0: Toyota Celica ST 1600 : Hillman Avenger: Triumph Spitfire: Oh and a Volvo 340 GL 1984 company car from new.

Mar 6th, 2020, 17:10	#5
Bendolfc Premier Member Last Online: Today 12:10 Join Date: May 2010 Location: Liverpool	Your issues sound more CEM related than ECU to be fair.

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