EGRacing

I have a JDM engine with JDM ECU, does the fuel pump pin from the ECU give 12v, 5v or does is ground the circuit?

chris_barry

Search the forums. The fuel pump control wire is on A15 and A16 on the US and JDM respectively. It is a pull to ground input. ( the fuel pump relay coil gets 12 volts on one end, and the ECU on the other).

Quickest remedy is to solder bridge the back of the circuit board where these pins attach. From memory its the middle row, 4th and 5th pins from the edge of the circuit board.