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ne1awd
07-11-2009, 01:06 AM
well im at a point where i dont understand.
three questions

1.the fcm has three wires coming off of it 1. ground 2. optional wastegate bypass vale 3. main red rj connector harness to hfs-6.
where does the optional wastegate bypass vale wire go to.

2.want to hook up a two computer fans to cool the pump off the 40 amp relay. will this blow the fuse.
http://c1.neweggimages.com/NeweggImage/ProductImageCompressAll125/35-200-049-02.jpg

3.is the 04sti ecu pinout the same for the 04 forester xt both are 32 bit
i think they are the same

4.next i dont understand what this means and how it is connected in the picture below white and brown wire going to pin 32 on ecu. "cut and splice to drop boost when failsafe is activated"

http://www.aquamist.co.uk/HFS6/Subaru/H6-04sti.gif

Richard L
07-11-2009, 10:46 AM
My answers in blue...

[quote="ne1awd"]well im at a point where i dont understand.
three questions

1. the fcm has three wires coming off of it 1. ground 2. optional wastegate bypass vale 3. main red rj connector harness to hfs-6.
where does the optional wastegate bypass vale wire go to.
The use of this this cable is optional. This is intended for by-passing car with EBC (electronic Boost controller - OE or third party) or MBC (manual boost controller). But you ned to purchase a MAC valve from howertonengineering.com. It is an altermnative to the brown and white wire. I suggest not using this cable for the time being, leave it as it is.

2. want to hook up a two computer fans to cool the pump off the 40 amp relay. will this blow the fuse.
http://c1.neweggimages.com/NeweggImage/ProductImageCompressAll125/35-200-049-02.jpg
You can use the fans, they drain very little current.

3. is the 04sti ecu pinout the same for the 04 forester xt both are 32 bit
i think they are the same
This is something I am not certain - Iwilltry to search on the forum for you.

4. next i dont understand what this means and how it is connected in the picture below white and brown wire going to pin 32 on ecu. "cut and splice to drop boost when failsafe is activated"
You cut the wire that controls the boost control valve at the ECU end. Connect the the white wire to the ECU side and the brwon wire to the BCV side. When you use this option, link the "DR ON" on the controller board to avoid CEL.

ne1awd
07-11-2009, 03:34 PM
ok so by hooking up the brown wire to the bcv and white wire to the pin on ecu is the same as buying a MAC valve from howertonengineering.com and hooking up the extra cable off the fcm. is one any better than the other as far as failsafe. and could they both be hookep up.

for the ecu. i know it is plug and play for the 04forester xt to use an 04 sti ecu when you put the tmic and turbo from the 04 sti on the forester. its a no tune mod that works.

ne1awd
07-11-2009, 03:54 PM
here is the pinout for the 05 xt couldnt find the 04. they seem to be the pinouts for 05xt and 04 sti.
http://www.northursalia.com/modifications/misc/wiring/05ForDOHC_ECM.pdf

05 Forester xt pins
pin b134 32 "wastegate control solenoid vavle"
pin b136 22 "MAP sensor signal"
pin b136 6 "fuel injector #1"
pin b137 15 "ignition switch"

Richard L
08-11-2009, 02:57 PM
ok so by hooking up the brown wire to the bcv and white wire to the pin on ecu is the same as buying a MAC valve from howertonengineering.com and hooking up the extra cable off the fcm. is one any better than the other as far as failsafe. and could they both be hookep up.

for the ecu. i know it is plug and play for the 04forester xt to use an 04 sti ecu when you put the tmic and turbo from the 04 sti on the forester. its a no tune mod that works.

It is unnecessary to hook up both, they do the same job. I would hood up the brown wire (BCV side) and White wire (ECU side). Don't foget to enable the "DR oN" link or you will get a CEL.

Richard L
08-11-2009, 03:02 PM
here is the pinout for the 05 xt couldnt find the 04. they seem to be the pinouts for 05xt and 04 sti.
http://www.northursalia.com/modifications/misc/wiring/05ForDOHC_ECM.pdf

05 Forester xt pins
pin b134 32 "wastegate control solenoid vavle"
pin b136 22 "MAP sensor signal"
pin b136 6 "fuel injector #1"
pin b137 15 "ignition switch"

It looks identical pin out as the sti pf the same year.