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john ryan
Member Since: 05 Apr 2006
Location: leamington spa
Posts: 121
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I have owned my D3 from new in feb 2005. Just lately the suspension has been dropping over a few days. I pumped it up and removed the 5a fuse as a first step to diagnosis, expecting one corner or one end to drop. However the car stays level, but still drops. I can't understand where the leak can be. Any ideas please?
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6th Jan 2021 10:25 am |
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pjm-84
Member Since: 04 Oct 2016
Location: Hampshire
Posts: 2406
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5amp? I thought it was 20amp but could be wrong?
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6th Jan 2021 11:19 am |
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john ryan
Member Since: 05 Apr 2006
Location: leamington spa
Posts: 121
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I pulled F3 (5a)
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6th Jan 2021 11:57 am |
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Pete K
Member Since: 15 Jan 2016
Location: GL
Posts: 10337
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I thought 20A too (under the bonnet)
Somewhere on here there is a picture of the correct fuse
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6th Jan 2021 12:18 pm |
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pjm-84
Member Since: 04 Oct 2016
Location: Hampshire
Posts: 2406
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F26?
Right hand bank, roughly about 6 in from the front . Happy to report that mine appears to be no longer dropping after the new front air valve block.
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6th Jan 2021 12:24 pm |
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Pete K
Member Since: 15 Jan 2016
Location: GL
Posts: 10337
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I think from memory F3 provides status info back to the suspension ecu, like the compressor relay operating
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6th Jan 2021 12:28 pm |
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john ryan
Member Since: 05 Apr 2006
Location: leamington spa
Posts: 121
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So the other possibility is F26(20a), which has the same descriptor as F3. I'll try F26, but can anyone say what is the control difference between F3 and F26? Obviously, removal of F3 does not prevent periodic self- levelling.
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6th Jan 2021 12:35 pm |
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Pete K
Member Since: 15 Jan 2016
Location: GL
Posts: 10337
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F26 removes all power from the air suspension ecu., so prevents levelling
F3 is just fusing a feedback wire to protect the cable (it will look at this signal when the car is started)
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6th Jan 2021 12:42 pm |
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john ryan
Member Since: 05 Apr 2006
Location: leamington spa
Posts: 121
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So, just to conclude this, F26 indeed disables the periodic self- levelling. After 5 days the front has dropped evenly, so it looks like a front valve block cleanout is required. Many thanks.
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10th Jan 2021 6:56 pm |
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john ryan
Member Since: 05 Apr 2006
Location: leamington spa
Posts: 121
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I couldn't find an air leak, but when I disconnected the electrical connection at the front solenoid block, the front suspension stayed level for 24 hours. So, I have definitely not got an air leak, but assume the controller is telling the front block to drop the suspension - which must be an errant signal from a ride hieght sensor? Any views from the experts here?
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19th Jan 2021 9:56 am |
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pjm-84
Member Since: 04 Oct 2016
Location: Hampshire
Posts: 2406
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Just changed front and rear air valve blocks. (Rebuild didn't work)
Odd to see my V8 still upright after a week.
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19th Jan 2021 10:29 am |
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