I put EC36pin15 to my fuelpump relay. I tested it, with manual power switched to it. This worked and the fuelpump was running. Now I have to configure the AVR to run it. In "Extra\Waterpump, Fan, Fuel pump" I set the following parameters:
- Pump on afterpowerup 3.2
- Pump on after inactivity 2.2
Now I need to chose a Fuelpump Driver and Channel.
GenBoard/Manual/DigitalOut/Table suggests EC36pin15 is P259 channel 5. If you don't have any output configured to this channel, you can manually switch it on / off with mdhd7 / mdh57 menucommands (to test it).
Select P259 channel 5 (not i5, as that will invert the output!) in megatune or apply\n
fuelpump_channel=57
in your etc/config.txt