youask Posted July 22, 2017 Report Share Posted July 22, 2017 hiran into some issues today. Got a G4extreme installed for nearly 5 years, and today while driving, suddenly the the MAP reading went from 90kpaish to 240kpa and ect from 80'c to 130'ccar overfueled and it threw a Analog 5v supply error code.I've cut the +5v cable 2inches from the ecu connector and measured the voltage to be 6.1volt. Must be a internal problem?the software reads Analog supply as 5v. Quote Link to comment Share on other sites More sharing options...
ClintBHP Posted July 22, 2017 Report Share Posted July 22, 2017 First thing I would do is remove it from the car, power the ECU with a good bench supply (battery is best) and then re measure it. Quote Link to comment Share on other sites More sharing options...
youask Posted July 22, 2017 Author Report Share Posted July 22, 2017 ive tried but the sensor (green) wires as well as disconnected my 5v sensors and tempsensors 5v sensors = oil pressure, fuel pressure, tps and maptemp = ect + iatstill reads the same. Also if i measure the red/white 8v i got 9.1voltwierd that it no longer throws the code and the ecu reports 5.01volt but i've tried 2 diffrent voltmeters and it's indeed 6volt Quote Link to comment Share on other sites More sharing options...
integrale8v Posted July 22, 2017 Report Share Posted July 22, 2017 (edited) Did you measure between sensor ground and 5v? or just ground on the car? Edited July 22, 2017 by integrale8v spelling Quote Link to comment Share on other sites More sharing options...
youask Posted July 23, 2017 Author Report Share Posted July 23, 2017 sensor ground (green wire in harmness) Quote Link to comment Share on other sites More sharing options...
Adamw Posted July 23, 2017 Report Share Posted July 23, 2017 This seems petty odd for both the 5V regulator and 8V regulator to die at the same time with the same 1.1V offset...Have you done as Clint suggested above by powering up the ECU on the bench with nothing else connected except for just the main gnd and +14V? If you have done that test and still get odd voltages then you will have to return the ECU for inspection/repair. Quote Link to comment Share on other sites More sharing options...
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