This issue has been going on for some time now, and I am at a loss as to whats going on!
Both my '99 and '02 do the same thing.
When the compressors are running, they "short cycle". By this, I mean they turn on and off in bursts of 15 seconds to a couple of minutes.
Looking at the compressor state on Nano, it shows compressor as "ON", and thermal switch as "NORMAL". It will do this from
stone cold, so not a thermal issue.....
I have several good compressors here, and they all do the same thing, so not the compressors.
The compressor relay is new, and it does cycle on and off with the compressor, so it is getting a signal to switch on and off.
If I wait a few minutes, the system will get up to pressure and the pressure switch will change state shutting off the compressor as it should.
I am looking at the EAS ECU, and I suppose the MosFet driving the relay is possibly thinking it is overcurrent and folding back the output? Looks like pin 8 from the ECU has that signal....
This is no major deal except that when the missus is doing short trips to the shops, it will eventually come up with an "Unknown Fault"
and go to extended height whilst flashing all 4 lights on the EAS switch. Probably finally runs out of air??
While I am at it, has anyone come up with an answer from Colin and his merry men about why the Nano displays an EAS fault as "Unknown"??? It can clear it fine, but not knowing why it faulted does not assist in troubleshooting!. Annoying, at best!