Cem replacement

Black dog · Sep 26th, 2018, 22:39

I've a 2004 v70 d5 non runner and I believe the cem is faulty. I'm going to get one from a breaker and would be greatful if anyone could advise exactly what I will require to get it running. I know I need the cem the key and the ecm.
Anything else? Is the transponder ring coded?

reggit · Sep 27th, 2018, 04:44

I’ll ask the obvious question.

Why do you think the CEM is faulty? Have you had the car hooked up to Vida to see what is wrong?

cheshired5 · Sep 27th, 2018, 08:55

Next obvious question..... Assuming the CEM is indeed faulty, why not just have the original CEM refurbished by a CEM specialist?

Clan · Sep 27th, 2018, 09:41

Quote:

Originally Posted by Black dog

I've a 2004 v70 d5 non runner and I believe the cem is faulty. I'm going to get one from a breaker and would be greatful if anyone could advise exactly what I will require to get it running. I know I need the cem the key and the ecm.
Anything else? Is the transponder ring coded?

the CEM is the main computer with all the cars data in it . It will not run another car only the one it was built with , you need a new CEM if it is faulty that is , then get the original software re loaded by a volvo dealer .

oragex · Sep 27th, 2018, 09:45

No, not a third question but both are good ones. CEM is one of those parts that it seems it can't be swapped. https://xemodex.com/us/faqs/

Black dog · Sep 27th, 2018, 20:47

Car was brought to me as a non runner. It's been to a few garages before me and they all have had a play with it and threw lots of parts at it with no obvious test method.
The owner said it hasn't run in a year now and all the other garages that gave up told him it was scrap! He said the car has sentimental value and even if the cost is greater than its value he would like to keep it.
Problems started when it would intermittently cut out and not restart until the battery was dis connected and re connected. Eventually it just wouldn't restart.
I can't get comms with the engine or abs units, ive tested all relays and fuses and seem to be getting power and grounds at all relevant places. It's my conclusion the cem has an internal fault or corrupted software.
To muddy the water even more there's two ecm's and two key antennas so not sure witch parts even belong to the car.
I was hoping to just fit everything from a scrapper and have it running.

harveys · Sep 27th, 2018, 22:16

Try getting hold of Elk diagnostics

Black dog · Sep 27th, 2018, 22:18

Quote:

Originally Posted by harveys

Try getting hold of Elk diagnostics

For a repair or replacement?

harveys · Sep 27th, 2018, 22:42

Quote:

Originally Posted by Black dog

For a repair or replacement?

Both to see what is wrong & reprogramming , the software they have is very good.

Black dog · Sep 27th, 2018, 22:43

Will give them a call tomorrow, I suspect it's fubar!

Sep 26th, 2018, 22:39	#1
Black dog Senior Member Last Online: Apr 22nd, 2024 21:32 Join Date: Jul 2016 Location: Derry	Cem replacement I've a 2004 v70 d5 non runner and I believe the cem is faulty. I'm going to get one from a breaker and would be greatful if anyone could advise exactly what I will require to get it running. I know I need the cem the key and the ecm. Anything else? Is the transponder ring coded? __________________ If I've offended you, good! That was my intention

Sep 27th, 2018, 04:44	#2
reggit Premier Member Last Online: Apr 25th, 2024 19:56 Join Date: Feb 2012 Location: Preston	I’ll ask the obvious question. Why do you think the CEM is faulty? Have you had the car hooked up to Vida to see what is wrong? __________________ 2009 Volvo V70 D5 (Polestar 225bhp) r-design 180,000 miles

Sep 27th, 2018, 08:55	#3
cheshired5 Premier Member Last Online: Dec 26th, 2021 13:42 Join Date: Dec 2013 Location: Crewe	Next obvious question..... Assuming the CEM is indeed faulty, why not just have the original CEM refurbished by a CEM specialist? __________________ 2002 S60 SE D5 Manual 209000 miles

Sep 27th, 2018, 09:45	#5
oragex Premier Member Last Online: Jul 26th, 2021 21:24 Join Date: Jun 2013 Location: Coldnada	No, not a third question but both are good ones. CEM is one of those parts that it seems it can't be swapped. https://xemodex.com/us/faqs/ __________________ Several Volvo Repair Videos https://www.youtube.com/playlist?lis...ECTts0FSVSOT_c

Sep 27th, 2018, 20:47	#6
Black dog Senior Member Last Online: Apr 22nd, 2024 21:32 Join Date: Jul 2016 Location: Derry	Car was brought to me as a non runner. It's been to a few garages before me and they all have had a play with it and threw lots of parts at it with no obvious test method. The owner said it hasn't run in a year now and all the other garages that gave up told him it was scrap! He said the car has sentimental value and even if the cost is greater than its value he would like to keep it. Problems started when it would intermittently cut out and not restart until the battery was dis connected and re connected. Eventually it just wouldn't restart. I can't get comms with the engine or abs units, ive tested all relays and fuses and seem to be getting power and grounds at all relevant places. It's my conclusion the cem has an internal fault or corrupted software. To muddy the water even more there's two ecm's and two key antennas so not sure witch parts even belong to the car. I was hoping to just fit everything from a scrapper and have it running. __________________ If I've offended you, good! That was my intention

Sep 27th, 2018, 22:16	#7
harveys Master Member Last Online: Feb 10th, 2022 22:33 Join Date: Jul 2007 Location: newton abbot in sunny Devon	Try getting hold of Elk diagnostics __________________

Sep 27th, 2018, 22:43	#10
Black dog Senior Member Last Online: Apr 22nd, 2024 21:32 Join Date: Jul 2016 Location: Derry	Will give them a call tomorrow, I suspect it's fubar! __________________ If I've offended you, good! That was my intention

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