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GDM
Member Since: 18 Oct 2020
Location: Midhurst, West Sussex
Posts: 144
  
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My D3 Commercial has been throwing suspension faults for about a year.
It started with the yellow light on the dash coming on after a couple of minutes of driving. Reading the codes I got the code for the system pressurising too slowly. We rebuilt the pump with an XR8 kit and it was fine for for about 6-8 weeks, then the light started coming on again. The same fault code was present again but it still held pressure fine, so we carried on driving it.
A couple of days ago we noticed that the suspension had dropped, so I pulled the pump off to check that it was operating properly. It ran fine and produced plenty of pressure. I re-fitted it but it wasn't running when the engine was started and suspension remained it it's lowest position. I read the codes again and got this:-
C1A27-14 (2E) Compressor circuit - General electrical failure - circuit short to ground or open
( on 19-05-2022 20:52:07 at 282460 km )
Apart from the obvious blown fuse, are there any other known problem areas to check?
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 19th May 2022 10:36 pm |
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loanrangie
Member Since: 18 Jun 2017
Location: Melbourne
Posts: 696
 
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Wiring behind the LH front side guard liner is problematic for chaffing and wire breakage.
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| 20th May 2022 1:13 am |
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Matty 2332
Member Since: 02 Dec 2008
Location: West Yorkshire
Posts: 670
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Did you change the compressor relay? these can be problematic over time.
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| 20th May 2022 5:58 am |
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GDM
Member Since: 18 Oct 2020
Location: Midhurst, West Sussex
Posts: 144
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Ok. Thanks. I will check the wiring. No I haven’t changed the relay.
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| 20th May 2022 6:19 am |
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GDM
Member Since: 18 Oct 2020
Location: Midhurst, West Sussex
Posts: 144
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New relay coming tomorrow.
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| 20th May 2022 7:44 pm |
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GDM
Member Since: 18 Oct 2020
Location: Midhurst, West Sussex
Posts: 144
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The relay was the wrong one but i changed it for the heated screen one and the compressor still didn't run.
Will check the wiring for chaffing tomorrow.
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| 21st May 2022 9:57 pm |
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GDM
Member Since: 18 Oct 2020
Location: Midhurst, West Sussex
Posts: 144
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So, I have no chaffed wires in the loom behind the n/s front wheel arch-liner and the loom looks fine all along to the compressor.
There is 12 volts at the fuse but I only have 12 volts at one of the coil terminals on the relay. I would have thought that there should also be 12 volts at one of the switch terminal contacts too.
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| 22nd May 2022 9:58 pm |
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GDM
Member Since: 18 Oct 2020
Location: Midhurst, West Sussex
Posts: 144
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On further investigation tonight the 60 AMP fuse has blown, so that explains the lack of power to the switch terminal on the relay. I think I am going to get a new compressor, as the motor must have caused the fuse to blow and when substituting a temporary glass 60 AMP fuse this evening, the motor doesn't sound great.
Question is, do I stick with Hitachi, or change to AMK? Can the IID tool do the software upgrade for the AMK pump?
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| 23rd May 2022 7:31 pm |
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loanrangie
Member Since: 18 Jun 2017
Location: Melbourne
Posts: 696
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Stick with a hitachi, amk is not an upgrade.
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| 23rd May 2022 10:07 pm |
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GDM
Member Since: 18 Oct 2020
Location: Midhurst, West Sussex
Posts: 144
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Fitted a new Hitachi compressor and 60 amp fuse at the weekend and all seems to be well. No warning lights after a 25 mile round trip!
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| 31st May 2022 12:24 am |
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