Power Fc In A 25t Rs Four "s"

[Duncan]

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

[wolverine]

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

[silva33]

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

[silva33]

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?

[Tangles]

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

[Tangles]

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

[silva33]

thats what my mechanic said that you cant get the exact ohm stated resistors

[Duncan]

lol sorry yes 51 not 52

[EGA41T]

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.

[wolverine]

yeah what he said...

[Tangles]

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

[Madaz]

any more information on the TPS wire on the attessa computer?

pinout diagram or colour wire

[EGA41T]

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

[Klymax]

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.

[32TAXI]

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

[neo32]

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

[atomaly]

i will be doing this once i get my hands on a PowerFC

[fmlycar]

Can some post a wiring diagram for this mod using the resistor method so I do muck it up?

[wolverine]

Did you read the thread?

http://www.sau.com.au/forums/topic/175032-power-fc-in-a-25t-rs-four-s/?p=3208663

[fmlycar]

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