Recognise on site and then test with HDS.... never found a damos.
EGR has two modes it seems....feedback and open.
In feedback mode, at constant speed, the target MAF on the EGR tables = Actual MAF (using RPM and IQ given).
At the same time the EGR duty % is almost exactly that gievn in EGR duty table 1.
I dont know when table 2 is engaged yet.
In open mode target EGR goes though the roof and has no resemblace to the EGR maps 1,2,3....egr duty % also drops to baseline with no resemblance to the duty % maps 1,2.
So there must be other EGR tables activated by pedal %
Open mode must be triggered by pedal % which means there is a threshold switch somewhere.
Would be nice to drop the pedal % on that.
I have been advised the coolant and air temp switches are in fact correction tables rather than switches :?
I will play with them anyway :D