Duncan Posted December 18, 2007 Share Posted December 18, 2007 check post #2 in this thread. pin 52 should have 5v coming out. you use the trick to lower it to 3.7v we are fooling the computer not the loom Link to comment https://www.sau.com.au/forums/topic/175032-power-fc-in-a-25t-rs-four-s/page/3/#findComment-3539904 Share on other sites More sharing options...
wolverine Posted December 18, 2007 Share Posted December 18, 2007 (edited) things to consider. there should be no wire on the loom for pin 51 if there is no traction control on your car. having spoken to EGA4IT and he says he has seen one car (maybe a later model with a wire in the loom). he said the zener diode is not in backward on the diagram they are reverse polarity (i hope i am translating accurately). regardless of whether you have a wire or not, you are trying to fool the ECU into thinking there is 3.7V so it 'thinks' traction control is working. if this modification is made you need to test that the voltage TO pin 51 is about 3.7V or else you have made a mistake. if the checklight is still on make sure that the boost controller is turned off on the powerfc as this is the usual reason the checklight stays on when first installed. Edited December 18, 2007 by wolverine Link to comment https://www.sau.com.au/forums/topic/175032-power-fc-in-a-25t-rs-four-s/page/3/#findComment-3539939 Share on other sites More sharing options...
silva33 Posted December 18, 2007 Share Posted December 18, 2007 Thanks for that, Ill give that a go... I just tried to turn the boost control off but of course it is in Japanese so i am assuming it is off at the moment as it has a diferent japanese character to the other warnings which i am assuming the tuner left on.. Thanks again to all for your help Dave Link to comment https://www.sau.com.au/forums/topic/175032-power-fc-in-a-25t-rs-four-s/page/3/#findComment-3540483 Share on other sites More sharing options...
silva33 Posted December 18, 2007 Share Posted December 18, 2007 check post #2 in this thread. pin 52 should have 5v coming out. you use the trick to lower it to 3.7v we are fooling the computer not the loom you mean pin #51 right? Link to comment https://www.sau.com.au/forums/topic/175032-power-fc-in-a-25t-rs-four-s/page/3/#findComment-3540485 Share on other sites More sharing options...
Tangles Posted December 18, 2007 Share Posted December 18, 2007 things to consider. there should be no wire on the loom for pin 51 if there is no traction control on your car. having spoken to EGA4IT and he says he has seen one car (maybe a later model with a wire in the loom). he said the zener diode is not in backward on the diagram they are reverse polarity (i hope i am translating accurately). regardless of whether you have a wire or not, you are trying to fool the ECU into thinking there is 3.7V so it 'thinks' traction control is working. if this modification is made you need to test that the voltage TO pin 51 is about 3.7V or else you have made a mistake. if the checklight is still on make sure that the boost controller is turned off on the powerfc as this is the usual reason the checklight stays on when first installed. thanks mate, that explains everything nice and easy, cheers again Link to comment https://www.sau.com.au/forums/topic/175032-power-fc-in-a-25t-rs-four-s/page/3/#findComment-3540487 Share on other sites More sharing options...
Tangles Posted December 18, 2007 Share Posted December 18, 2007 mind you, I can only find 2-off 390ohm (not 400) and 2-off 10.0V diode (not 10.3) and got 3m of 7.5amp 13V wire all up - $2 Link to comment https://www.sau.com.au/forums/topic/175032-power-fc-in-a-25t-rs-four-s/page/3/#findComment-3540780 Share on other sites More sharing options...
silva33 Posted December 19, 2007 Share Posted December 19, 2007 thats what my mechanic said that you cant get the exact ohm stated resistors 1 Link to comment https://www.sau.com.au/forums/topic/175032-power-fc-in-a-25t-rs-four-s/page/3/#findComment-3540886 Share on other sites More sharing options...
Duncan Posted December 19, 2007 Share Posted December 19, 2007 lol sorry yes 51 not 52 Link to comment https://www.sau.com.au/forums/topic/175032-power-fc-in-a-25t-rs-four-s/page/3/#findComment-3541943 Share on other sites More sharing options...
EGA41T Posted December 19, 2007 Author Share Posted December 19, 2007 thats what my mechanic said that you cant get the exact ohm stated resistors it doesnt have to be exactly 400 ohm, it could be 500 or even 300 ohms, the idea is to provide a reasonably high resistive path back to negative so that current does not flow through the ecu in the event of some sort of failure/short. also the zener diode needs to be installed in reverse bias. your auto electrician should know what this means. Link to comment https://www.sau.com.au/forums/topic/175032-power-fc-in-a-25t-rs-four-s/page/3/#findComment-3542403 Share on other sites More sharing options...
wolverine Posted December 19, 2007 Share Posted December 19, 2007 yeah what he said... Link to comment https://www.sau.com.au/forums/topic/175032-power-fc-in-a-25t-rs-four-s/page/3/#findComment-3542481 Share on other sites More sharing options...
Tangles Posted December 19, 2007 Share Posted December 19, 2007 it doesnt have to be exactly 400 ohm, it could be 500 or even 300 ohms, the idea is to provide a reasonably high resistive path back to negative so that current does not flow through the ecu in the event of some sort of failure/short.also the zener diode needs to be installed in reverse bias. your auto electrician should know what this means. thanks andy awesome news cant wait to hook mine up and 'see' what happens Link to comment https://www.sau.com.au/forums/topic/175032-power-fc-in-a-25t-rs-four-s/page/3/#findComment-3542816 Share on other sites More sharing options...
Madaz Posted September 19, 2008 Share Posted September 19, 2008 any more information on the TPS wire on the attessa computer? pinout diagram or colour wire Link to comment https://www.sau.com.au/forums/topic/175032-power-fc-in-a-25t-rs-four-s/page/3/#findComment-4142557 Share on other sites More sharing options...
EGA41T Posted May 26, 2009 Author Share Posted May 26, 2009 i have had a few pm's and just thought id add a quick note to prevent confusion/frustration, if u cant find a 10.3V zener diode you can use multiple diodes that add up to 10.3V as long as they are connected in series Link to comment https://www.sau.com.au/forums/topic/175032-power-fc-in-a-25t-rs-four-s/page/3/#findComment-4618794 Share on other sites More sharing options...
Klymax Posted July 24, 2009 Share Posted July 24, 2009 Hey Guys, Having some trouble with my powerFC. My car to clarify is a ER34 (R34GTT) that has had a conversion to manual. the powerFC throws up a backlight on the THR sensor with a voltage of 0.00. The car runs perfectly after an init clear. however I have some problems. MIL light is always on, TCS light is on and cannot be toggled with the TCS switch on the dash. the Aircon turns on but the compressor does not and last but not least HICAS light is also on. any ideas if my series 1 R34 has the same problem as the Stags? Cheers. Link to comment https://www.sau.com.au/forums/topic/175032-power-fc-in-a-25t-rs-four-s/page/3/#findComment-4733618 Share on other sites More sharing options...
32TAXI Posted October 25, 2009 Share Posted October 25, 2009 Pin #51 ALL GOOD Used 12v source, 400ohm resistor and zenor diode to earth. 3.1v on powerfc and NO check light! Economy tune on 10psi, Thursday @ PITS Link to comment https://www.sau.com.au/forums/topic/175032-power-fc-in-a-25t-rs-four-s/page/3/#findComment-4899199 Share on other sites More sharing options...
neo32 Posted January 18, 2010 Share Posted January 18, 2010 will this work on my r32 with neo engin check light is alwasy on tpm light is always reading 5v + thanks in advance and who in brisbane can do this for me Link to comment https://www.sau.com.au/forums/topic/175032-power-fc-in-a-25t-rs-four-s/page/3/#findComment-5041590 Share on other sites More sharing options...
atomaly Posted January 19, 2010 Share Posted January 19, 2010 i will be doing this once i get my hands on a PowerFC 1 Link to comment https://www.sau.com.au/forums/topic/175032-power-fc-in-a-25t-rs-four-s/page/3/#findComment-5042670 Share on other sites More sharing options...
fmlycar Posted February 17, 2015 Share Posted February 17, 2015 Can some post a wiring diagram for this mod using the resistor method so I do muck it up? Link to comment https://www.sau.com.au/forums/topic/175032-power-fc-in-a-25t-rs-four-s/page/3/#findComment-7481678 Share on other sites More sharing options...
wolverine Posted February 17, 2015 Share Posted February 17, 2015 Did you read the thread? http://www.sau.com.au/forums/topic/175032-power-fc-in-a-25t-rs-four-s/?p=3208663 Link to comment https://www.sau.com.au/forums/topic/175032-power-fc-in-a-25t-rs-four-s/page/3/#findComment-7481949 Share on other sites More sharing options...
fmlycar Posted February 17, 2015 Share Posted February 17, 2015 I did but the first diagram uses a diode and a resistor then in the next post it's stated that you can use just a 510k ohm resistor. I'd just like a diagram for that if possible Link to comment https://www.sau.com.au/forums/topic/175032-power-fc-in-a-25t-rs-four-s/page/3/#findComment-7481955 Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now