key reader is all part of cas/ewls unit they are known to just give up, cas unit is where the signal starts from after the button to bcm to starter solenoid. have seen many on here with same issue and found cas unit and lost code between it and key and bcm. i tend to avoid these faults as specialist gear needed, BBA REMEN repair them or would give more infoNew battery still same, earth's good, resistances good, still not recognising key in slot, ribbon ok on keyreader, can't find clutch switch but surely that wouldn't stop ignition coming on, just stops cranking, ???