Fuel Pressure sensor

[lsvtec]

Hello all,

I'm trying to wire in a 0-5v fuel pressure sensor to this pin (noted below, C15). It has been powered externally via a 12v to 5v converter and is grounded to a logic ground (thermostat ground for OBD1 Honda). For the signal wire is where I'm confused regarding the boostednw ECU.

I have looked at this. https://rusefi.com/docs/pinouts/uaefi/honda-obd1/?pin=A7

The ECU came with an extra plug which I think is "C" however there are only 12 pins available and in the photo it is asking for C15. Am I looking at this wrong? Where would I pin in the signal wire to?

I'd also eventually also get an oil pressure sensor wired in too.

[AndreyB]

You are asking how to route an auxiliary analog input channel.

Does not seem to be routed to main 76 pin header but a couple of pins are available on the ETB upgrade option

Please use TPS2 or PPS1

image.png

[lsvtec]

Thank you, I’ll give those a try

[lsvtec]

I made a small table to sort through these inputs so others can reference it. Please correct if there are any mistakes. I also could not find corresponding OBD1 pin locations for PPS1, PPS2, and TPS2 (unless for these inputs we would have to wire in directly to the board?)

It seems like my only viable options for easy plug n play would be to use Aux 1 and Aux 2 (D12 and D14 on OBD1 harness side) to connect 0-5v analog sensors (fuel pressure and oil pressure in my case) ~

For wiring a 3 port MAC solenoid valve for boost control, it looks like A11 (OBD1) which corresponds to B2 (rusEFI) would be a reasonable option.

Please let me know if I'm missing anything here.

[AndreyB]

TPS2 PPS2 you need to use ETB and TPS connectors on the board

image.png

[lsvtec]

TPS2 PPS2 you need to use ETB and TPS connectors on the board

image.png

So the signal wire (0-5v) just needs to be wired directly into these two areas? (im using external 5v and ground source that is separate from ECU wiring)

[AndreyB]

There is some life at https://github.com/rusefi/rusefi/wiki/Discord maybe try it?