wiring help needed

[fbssub1]

Ok up dating Bankies RSRA with a new motor, fitted a v7 STI intake just need help wiring up the ICV and TPS, going from v3 sti intake/wiring so both are 3 wire plugs so just need to repin, im no electrical wizard, original facelift BC5 engine loom is being used

bc loom colours for tps being used for v3 are red,white and black with white strip

icv still bc colours black,yellow red stripe and white

v7 sti colours for tps are red,black green stripe and yellow green stripe

icv are white,red and black white stripe

on v7 tb just to the right of ivc is an other 3 wire sensor what is it, do I need it

[Rosssub]

The sensor beside the IACV is the version 7 MAP sensor. Which ECU are you running?

Using this JDM version 7 STI ECU pinout/wiring diagrams:

http://www.romraider.com/forum/download/file.php?id=18932&sid=f83e35996ade7a43fd66a0f0624a6c84

The version 7 TPS and IACV wiring is:

TPS:

Signal - yellow/green

power - red

ground - black/green

IACV

Signal - white

power - red

Ground - black/white

Edited March 9, 2015 by Rosssub

[fbssub1]

hey Ross thanks will try find the wiring for the bc5

[Rosssub]

Sweet, hope it helps. Looks like the 3 wires going to the V3/4 IACV are a different setup to the V7. The V3/4 IACV has:

IACV open end - signal

IACV closed end -signal

12v power - 12v power

http://www.linkecu.com/support/documentation/technical-drawings/A01

So you'll need to splice one V3/4 IACV wire into an earth, or swap pins at the ECU depending on which ECU your using.

IACV open end - signal

IACV closed end - ground

12v power - 12v power

Edited March 9, 2015 by Rosssub

[Koom]

Here's a bc5 service manual.

https://www.dropbox.com/s/6eqicpdpeh3apar/89-92%20JDM%20Service%20Manual_legacy.pdf?dl=0

Wiring in the section near the end of the manual. (30Mb).

[fbssub1]

never run icv before want to run it now using the v7 intake manifold,so wiring up the v7 icv to the bc loom, wish someone could tell what to do lol, fk I hate electrical

[fbssub1]

 Koom said:

Here's a bc5 service manual.

https://www.dropbox.com/s/6eqicpdpeh3apar/89-92%20JDM%20Service%20Manual_legacy.pdf?dl=0

Wiring in the section near the end of the manual. (30Mb).

got a page number, fk there like 902 of them

[Rosssub]

These BC5/BG5A ECU pinouts also show the same 3 wires for the IACV.

http://reuben.xpjets.com/random/ECU_Pinouts_BC5-BG5a-WRX_4plug.pdf

IACV - open

IACV - closed

12v - power

So a BC5/V3/V4 ECU can't run a Version 7 IACV.

You would have to remote mount the earlier IACV somewhere with hoses tapped in.

Edit: The V7 TPS will wire in ok. But might give slightly different signals to the ECU, mainly at idle/closed throttle.

Version 7 TPS signal voltage to ECU:

Fully closed - 0.2v-0.1v

Fully open -4.2v-4.7v

BC5/V3/V4 TPS signal voltage to ECU:

Fully closed - 0.5v

Fully open - 4.2v

But you could probably adjust the version 7 TPS, so that it's giving 0.5v at idle.

Edited March 9, 2015 by Rosssub

[Guest]

This is running link ae brian?

[fbssub1]

yep running g4

[Rosssub]

 fbssub1 said:

yep running g4

Aww, sweet.

This link pic shows which wire is which on the older IACV plug:

http://www.linkecu.com/support/documentation/technical-drawings/A01

Make the BC5 IACV open signal wire the new G4 signal wire.

Cut the BC5 IACV closed signal wire and splice it into a sensor ground.

BC5 IACV--------Version 7 IACV

IACV open - IACV signal

IACV closed - IACV ground

IACV 12v - IACV 12v

BC5 pinout:

http://reuben.xpjets.com/random/ECU_Pinouts_BC5-BG5a-WRX_4plug.pdf

Edited March 9, 2015 by Rosssub