Wiring second fuel pump

[CT9A]

I am trying to wire in a second fuel pump on a WRX, IGN6 seems to be free in the software. On the pinout found on the forum it says __TTLHDR, what does this mean, there is also no pin assigned in the pinout. Is this usable and which pin is it connected to?

[CT9A]

I could use FUEL 09 or 10 maybe, but also these cannot be found on the pinout, or are they named something else? Confused

[TimH]

__TTLHDR means it is brought out the the 12 way expansion connector, so easily accessed.

Fuel 9 and 10 are - I believe available on an internal header to be used for the TGVs but I don't know what the details are of this. It mentions a pull-up but I don't know it it's to 12V or not.

Main problem with the IGN output is that it is a VERY low current TTL drive and only pulls up to around 4V in my experience: I struggled to get it to trigger even a solid state relay designed for 4V operation.

Hopefully Pat will be along to explain how to access the 2 fuel outputs

[CT9A]

FUEL 9 and 10 are AUX 1 and 2. I can use those.

Thanks Ryan and Tim for the support.

[TimH]

FUEL 9 and 10 are AUX 1 and 2. I can use those.

Ah, yes - you said WRX, so no AVCS: didn't spot that And it's outputs 7 and 8 that are for the TGVs anyway