Can't exactly remember, it's in one of the sub-menus of the engine ecu. Could well be the ecu condition option too. If not check through Principle Parameters 1 & 2 and Driving Information.
Let me know if you can't find it & I'll go plug mine in / let you know.
2002 HDi 2.2 Exec Estate, (2008-12) (wonderful)
2003 HDi 2.2 6-speed Exec Estate (2012-19) (also a gem)
2009 Citroen C5 2.0 HDi VTR+ Estate (godawful heap)
2008 BMW E91 330i touring (great fun - murdered by a reversing SUV)
2007 BMW E91 325i touring (slower smoother quieter)
hi lift fuel pump in tank - replaced with secondhand and fault remained - also tested by diesel specialist
crank sensor
diesel pump - tested by diesel specialist
engine ecu - sent away for testing by ECU specialist and also tried using a test ecu
fuel pressure regulator - replaced with second hand one
crank and cam sensor synchronisation
key/immobiliser sync using PP2K
fuel filter - replaced with previous working one from recent service
BSI - tested by BBA reman
So after all the above its still not starting and I probably should have thrown in the towel a while ago but I don't like to give up!!
The original fault on the engine ecu was related to the fuel pressure regulator so this might be worth another look and a recurring fault on PP2K is the BSI not communicating with the engine ECU so possibly with the ECU and BSI both being tested OK it could be a wiring loom issue??
I don't think it's the right circuits but there are a few connectors under the carpet in the driver's side footwell that sometimes get wet and, as a lot of it is mux, can produce some fairly unusual problems.
As you say, you seem to have eliminated almost everything, apart from the wiring
Congratulations on the result. My first impression was Lift Pump which you may hear under the rear seat at switch on but as in my case the pump motor though turning was not strong enough to lift the fuel to the filter.
Worse than that my 2001 Hdi was an in-between and the hole to remove the LP was for the smaller later model LP and I had to physically enlarge the hole before I could get the LP out! It was either that or drop the tank. Gallic ingenuity!