V50 D4 engine AIR CON

Larkaround · Jul 26th, 2016, 19:42

Does anyone know where i could get a wiring diagram of the air conditioning system on the D4 engine. My compressor clutch isn't engaging but i don't know yet if it's the actual clutch that has the problem yet as there is no voltage from the wire that connects to the compressor despite a healthy 12.5v at the fuse.
The system is charged up to 100psi so i'd like to find where the wiring goes to after it leaves the fuse box?

imjohnson · Jul 26th, 2016, 23:42

Yes please! Having very similar issue with my 11Reg D3. It has been tested for leaks and regassed. Found a relay in under bonnet fuse box that appears to control the compressor clutch and if the contacts are bypassed the compressor runs. Tried swopping it with another relay with no joy so want to find where the signal for the relay comes from, also what sensors the A/C looks at to determine whether the A/C should run or not. Hope that makes sense!

Cheers
Ian

Larkaround · Jul 27th, 2016, 19:17

I was wondering if i should run a 12volt feed straight from the battery to the compressor just to see if it kicks in but i don't want to fry any contacts or the like if the feed shouldn't be 12v . a wiring diagram would be the answer i think but the haynes manual doesn't have one for the AC .. thought perhaps someone on here would have one.

Larkaround · Jul 27th, 2016, 19:20

Also .....Im not at all sure how to use this rather complicated web site... how do i find previous Air Con Threads ? Took me to find my thread from the night before to see if anyone had answered me !!!

volare · Jul 28th, 2016, 11:18

This may cover all countries. Couldn't attach it as it's 45MB!!

http://www.matthewsvolvosite.com/dow...ng_diagram.pdf

Larkaround · Jul 28th, 2016, 16:45

Wow !! Thanks . This will keep me in reading for a while.. Incidentally you don't happen to have a workshop manual in PDF form for the D4 engine too do you, The haynes manual isn't very comprehensive unfortunately !
Regards
Rab

volare · Jul 28th, 2016, 17:12

Yea, it's a bit heavy going! I don't have a manual. Quite a few folks on here use genuine or otherwise (with some problems) VIDA/DICE software which I believe contains an 'electronic' manual. A search should provide some info. Ebay seems to be a source....

Larkaround · Aug 3rd, 2016, 14:25

Thanks , I have a Haynes manual for my V50 D4 but it isn't very comprehesive, but i'll try ebay for the electronic one as you suggest
Thx again.

games133 · Aug 4th, 2016, 11:27

you might want to buy a vida disc of ebay and install that or download it from some wear like I did and run that it has al the wiring harness in it I believe

Jul 26th, 2016, 19:42	#1
Larkaround Larkaround Last Online: May 26th, 2020 20:33 Join Date: May 2015 Location: Dunfermline	V50 D4 engine AIR CON Does anyone know where i could get a wiring diagram of the air conditioning system on the D4 engine. My compressor clutch isn't engaging but i don't know yet if it's the actual clutch that has the problem yet as there is no voltage from the wire that connects to the compressor despite a healthy 12.5v at the fuse. The system is charged up to 100psi so i'd like to find where the wiring goes to after it leaves the fuse box? Last edited by Larkaround; Jul 26th, 2016 at 19:44. Reason: Punctuation

Jul 26th, 2016, 23:42	#2
imjohnson Junior Member Last Online: Mar 19th, 2024 21:41 Join Date: Aug 2007 Location: Alston	Yes please! Having very similar issue with my 11Reg D3. It has been tested for leaks and regassed. Found a relay in under bonnet fuse box that appears to control the compressor clutch and if the contacts are bypassed the compressor runs. Tried swopping it with another relay with no joy so want to find where the signal for the relay comes from, also what sensors the A/C looks at to determine whether the A/C should run or not. Hope that makes sense! Cheers Ian

Jul 27th, 2016, 19:17	#3
Larkaround Larkaround Last Online: May 26th, 2020 20:33 Join Date: May 2015 Location: Dunfermline	I was wondering if i should run a 12volt feed straight from the battery to the compressor just to see if it kicks in but i don't want to fry any contacts or the like if the feed shouldn't be 12v . a wiring diagram would be the answer i think but the haynes manual doesn't have one for the AC .. thought perhaps someone on here would have one.

Jul 27th, 2016, 19:20	#4
Larkaround Larkaround Last Online: May 26th, 2020 20:33 Join Date: May 2015 Location: Dunfermline	Also .....Im not at all sure how to use this rather complicated web site... how do i find previous Air Con Threads ? Took me to find my thread from the night before to see if anyone had answered me !!!

Jul 28th, 2016, 11:18	#5
volare volare Last Online: Jul 14th, 2019 11:17 Join Date: Apr 2015 Location: Plymouth	This may cover all countries. Couldn't attach it as it's 45MB!! http://www.matthewsvolvosite.com/dow...ng_diagram.pdf

Jul 28th, 2016, 16:45	#6
Larkaround Larkaround Last Online: May 26th, 2020 20:33 Join Date: May 2015 Location: Dunfermline	Wow !! Thanks . This will keep me in reading for a while.. Incidentally you don't happen to have a workshop manual in PDF form for the D4 engine too do you, The haynes manual isn't very comprehensive unfortunately ! Regards Rab

Jul 28th, 2016, 17:12	#7
volare volare Last Online: Jul 14th, 2019 11:17 Join Date: Apr 2015 Location: Plymouth	Yea, it's a bit heavy going! I don't have a manual. Quite a few folks on here use genuine or otherwise (with some problems) VIDA/DICE software which I believe contains an 'electronic' manual. A search should provide some info. Ebay seems to be a source....

Aug 3rd, 2016, 14:25	#8
Larkaround Larkaround Last Online: May 26th, 2020 20:33 Join Date: May 2015 Location: Dunfermline	Thanks , I have a Haynes manual for my V50 D4 but it isn't very comprehesive, but i'll try ebay for the electronic one as you suggest Thx again.

Aug 4th, 2016, 11:27	#9
games133 Junior Member Last Online: Jul 14th, 2023 16:46 Join Date: Mar 2014 Location: Middlesbrough	you might want to buy a vida disc of ebay and install that or download it from some wear like I did and run that it has al the wiring harness in it I believe

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