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2jz supra fuel pump activation
Posted: Thu Oct 01, 2015 12:01 pm
by 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
Re: 2jz supra fuel pump activation
Posted: Thu Oct 01, 2015 10:52 pm
by 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.
Re: 2jz supra fuel pump activation
Posted: Fri Oct 02, 2015 6:31 pm
by ihiryu
Correct,
Best thing to do is run new wires to the pump. Neither one of those will kick over a relay.
Re: 2jz supra fuel pump activation
Posted: Sun Oct 04, 2015 3:42 pm
by 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.
Re: 2jz supra fuel pump activation
Posted: Sun Oct 04, 2015 8:00 pm
by Karel
Well done