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 Posted: Wed Jan 05, 2011 3:18 pm |
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Joined: Feb 07, 2010
Posts: 13077
Trade Rating: +65
Location: England
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Does basic AC have a ECU like CC+DAC?
Ta
Lee
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Posted: Wed Jan 05, 2011 3:42 pm |
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Joined: Feb 07, 2010
Posts: 703
Trade Rating: 0
Location: Evesham, Worcestershire
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No I don't think so.
The switch just turns the compressor on. Its not controlled via temperature or rate of flow.
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Posted: Wed Jan 05, 2011 3:47 pm |
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Joined: Feb 07, 2010
Posts: 13077
Trade Rating: +65
Location: England
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Didn't think it had one, was just checking because when I plugged PP in I get "ECU undetectable" and the air con doesn't work. The fan doesn't even come on when I switch it on.
Looks like I'm troubleshooting with the multimeter then.
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Posted: Wed Jan 05, 2011 3:53 pm |
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Joined: Feb 07, 2010
Posts: 7094
Trade Rating: +11
Location: Suffolk
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| Lee wrote: |
| Does basic AC have a ECU like CC+DAC? |
Yeh its connect to DBA via the CCA reffered by the EAP 
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Posted: Wed Jan 05, 2011 3:53 pm |
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Joined: Sep 14, 2010
Posts: 358
Trade Rating: +1
Location: llanelli
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its monitored by the ecm, and bcm generally. whats the problem with yours? ( im aircon f-gas certified il have you know ) 
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| 2.0 hdi 90
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Posted: Wed Jan 05, 2011 4:05 pm |
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Joined: Feb 07, 2010
Posts: 13077
Trade Rating: +65
Location: England
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Just doesn't work at all
The light comes on when pressed, but doesn't get any hotter/colder. Nor does the fan like it should when its switched on. The fan does work as I tested that with PP, and it spins fine. The idle doesn't increase either when the car is stationary and the AC is activated.
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Posted: Wed Jan 05, 2011 5:18 pm |
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Joined: Feb 07, 2010
Posts: 703
Trade Rating: 0
Location: Evesham, Worcestershire
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Does the compressor clutch engage? You can hear it clunk as it switches on.... though I guess not as the idle would be affected.
The compressor won't kick in due to inadequate refrigerant, check for leaks around the condenser/pipe work. It probably isn't the compressor thats at fault because in our climate its not overly worked.
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Posted: Wed Jan 05, 2011 5:46 pm |
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Joined: Feb 07, 2010
Posts: 13077
Trade Rating: +65
Location: England
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Nah it does nothing except the little green light comes on.
I'll have a gander, need to service it and change the drop links anyway
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Posted: Thu Jan 06, 2011 4:37 am |
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Joined: Nov 27, 2010
Posts: 11522
Trade Rating: +10
Location: What's it to you? ? ?
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| Lee wrote: |
Nah it does nothing except the little green light comes on.
I'll have a gander, need to service it and change the drop links anyway |
It could be low / out of gas 
The pressure safety switch will prevent the ac compressor running to protect the system & your wallet.
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Posted: Fri Feb 04, 2011 11:06 am |
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Joined: Feb 07, 2010
Posts: 13077
Trade Rating: +65
Location: England
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Think I've found the problem, scanned it today and got this.
P1110 - Air Conditioning cut off circuit - Short Circuit to Earth or Circuit Open
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