Apexi Power FC WONT TURN ON!! help! RB25det

[thomasK(austin)]

ok my stock ecu works just fine, ive been driving it forever so i bought a powerfc and the damn thing wont turn on. i have pin 45 hot, and pin 58 (both are main powers) but 49,59,109 arent powered up with the powerfc, but with the stock ecu, they have 12v, so there is no problem with my wiring.i have heard of the backup power not working and this will cause the powerfc not to turn on, so will someone let me know what pin on the ecu needs to go to the battery for backup and if it needs to be fused or not. i have rb25det series 2 if that matters.

thanksthomas

[Joe]

i can tell you this happened on my friends AEM EMS too. the constant power (backup) wasnt wired.

i dont know the pin offhand tho. ill see if i can dig it up

[thomasK(austin)]

well i have some constant powers, just dont know if anything else is causing this. or how many wires are supposed to be hot.

[StricNyne]

i had same problem, car runs perfect without this constant power but power fc wont work without it lol i thought mine was broken, i almost snapped. i tapped the radio constant power line and threw a fuse on it

[thomasK(austin)]

hi, stricnyne can you please tell me step by step what you did (and what pin the constant power goes to). i have to describe it to a friend who is setting up my powerfc. i would do it, but im 2300 miles away from my car .

[Yellow4g63]

hi, stricnyne can you please tell me step by step what you did (and what pin the constant power goes to). i have to describe it to a friend who is setting up my powerfc. i would do it, but im 2300 miles away from my car .

pin 58 I think it's a 5v

http://www.rb20det.com/ecupinout.html dont worry about the Rb20 thing. THere pins are just the same as the 25's cept for the VTC and injector 5 and 6 are reversed order.

[thomasK(austin)]

so the pinout says battery supply voltage and i have 12v at pin 58 with the car off, so thats not the problem.....**** this is starting to irritate me, cant figure out why this wont turn on.