Originally Posted by Vrank
The first one is correct and is also the way that Toyota does it. Make sure you're using a relay and not using the ems itself to drive the pump. Also, depending on how/when you're triggering the pump you might need a retune because of pressure spikes.
Thanks for the reply. I am using a relay for switching the pump on.
But if the first picture is correct, is it safe to use that picture even though my AEM does not correspond with it? Like plug B pin 21 is pin 41 on the top picture.
I am worried that the AEM manuals says pin 21 plug b outputs one thing, but outputs something else instead.
I am also getting a retune because I never finished tuning because of the pressure loss last time.