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JDM P72 Help!
Posted: Mon Dec 29, 2008 9:09 pm
by sohcd16y8
Does anyone know for sure if an OBD-1 JDM P72 ECU sends a ground signal for the IAB's liek the USDM ecu, or a +12V signal like the OBD-2 ecu's? I keep reading mixed info when I search. Thanks
Posted: Tue Dec 30, 2008 1:35 am
by relic1
depends on the year of the P72. some were 12V active, some were ground active. I've seen both, yes it's a minor headache. I've never really dug into what years are what, or what versions are what. It's easy to tell what's what once it's plugged into a car.
Posted: Tue Dec 30, 2008 1:40 am
by sohcd16y8
Crap, Idk what year it is. I guess I will just wire it assuming that it sends +12v, that way if it sends ground it just wont do anything, rather than risk the solenoid having 12 on both sides. Anyone else know for sure?
Posted: Tue Dec 30, 2008 1:57 pm
by relic1
either way you wire it, if it activates the other way... it will do nothing. No harm will come to it if it has 12V on both sides.
Posted: Tue Dec 30, 2008 4:02 pm
by RoadXY
Electronics work on power difference. The difference of two time 12v is none
