after turbo change and battery disconnected for a moth ,
car has no idle. on 2002 Volvo S40

replaced idle control valve ,coolant tem p sensor no help .no codes
at OBS show Mod 1 and Mod 30 not worwing could be ECM bad.removed
idle control valve with sw on valve does not move to open voltaje
dc aprox .90 volts.or need re programing ECM

Asked by for the 2002 Volvo S40
drive car for approx 5 mins and see if it relearn proper idle