I completely removed EGR valve and EGR cooler from engine bay of my 147 1.9 JTD 8v and on its place connected one resistor of 8.2Ω/20W. Same resistance I measured on EGR solenoid (it has 2-wire connection). FiatECUScan reports "EGR Invalid Signal" error (P0404, not fatal, but appears again and again, although always clear error). Same error FES reported if EGR valve was blocked... When I disconnect EGR (or resistor) fatal error appears.
Do ECU measure some other parameter, not only resistance, but inductance or capacity and this is cause of error? Which is way that I can avoid this error?