FIS Posted July 4, 2023 Report Share Posted July 4, 2023 Hello, Due to high current of high volume fuel pump I am going to by pass FPC and use additional relay for fuel pump (set to standard mode). The relay will be triggered by aux 6 (pin C12). I wonder what is the signal of pin B33 of ECU, it is from ECU to FPC but according to WRX11 manual it said no connection. Thank you Quote Link to comment Share on other sites More sharing options...
Adamw Posted July 4, 2023 Report Share Posted July 4, 2023 B33 is a "yes the pump is running" feedback signal from the pump controller to the ecu. Quote Link to comment Share on other sites More sharing options...
FIS Posted July 4, 2023 Author Report Share Posted July 4, 2023 Thank you Adam Quote Link to comment Share on other sites More sharing options...
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