As the title says, I am trying to figure out why I do not have a 5 volt signal at my leading coil. My car has a power fc with the banzai adapter. I have looked around but have not found any threads power fc specific so I figured id ask and see if anyone has any ideas. I have tried using a DVM to ohm out the green wire on the CAS to the 1N pin on the ecu and it has shown there is continuity there. I also check my FEM-01 and FEM-02 connections and nothing is lose or disconnected. I even went and replaced the coil just incase haha. I have also been told if the battery does not have enough volts it wont send signal and i do know my battery is around 12.1v right now. Could that be the issue? I will be sure to charge the battery and check again tomorrow but as of now, if anyone has an ideas please let me know! Thanks everyone

 

I’m running a fd power fc in a s5 so running the s5 banzai racing patch harness. Leading coils worked right out of the box but I did have to modify the trailing coils. Do you have power to the rest of the engine harness?

 

yes there is power to the rest of the harness. I also have power to the coil just not the 5v ecu signal

 

I think you're checking the wrong wires. The CAS, FEM-01, and FEM-02 wires don't touch the power and signal wires for the leading coil.
The b/y wire is your 12v source and is powered by the main relay. I'd check to see if that wire is getting 12v. But if it's not seeing signal it's probably the g/y wire. That one runs directly into the ecu and should be on the larger ecu connector.

 

why do you think you will see a 5v signal at the leading coil, are you using an oscope? its a pulsed signal, probably too fast for amultimeter. you will see 12v and 0v at the two wires