2jz supra fuel pump activation

[RHD]

When using the factory loom how do we activate the fuel pump controller??

There are 2 wires to the factory ecu labeled DI-pin 21 and FPC-pin 22, Which one to use and what signal does it require?

thanks

[Karel]

I dont remember the pins, but the stock Supra has "pump" controler. Its load depending and at light load gets the pump just cca 9V , and high load it gets the full 12V. So lets try, or disable this "pump controler" completly.

[ihiryu]

Correct,

Best thing to do is run new wires to the pump. Neither one of those will kick over a relay.

[RHD]

ok thanks... did a bit figuring out and came up with an easy fix!

There are 2 control wires in the harness from the controller to the factory ecu so i just connected one of them to AUX1 O/P, I then ripped out the controller in the rear quarter panel and replaced it with a relay using the wire i connected at the other end to activate it... job done no new wires or anything required

very easy to figure out, the controller plug has 2 big fat wires that run the pump and the two that go back to the ecu plugs one of which i used for the relay signal wire.

[Karel]

Well done