MSefi.com read only forum (Jan.15,2018)

Im a bit confused now..

In the megamanual it states that the sensor ground must go to pin 19 at the DB37

in a diagram it goes to pin 7...

and just found another diagram where it goes to PIN 1 + 2..

And finally a diagram where it goes to Enginecase..

What is the best way to have the sensorground

It doesn't much matter as all those pins are connected to the MS PCB ground. The important thing is to run the sensor grounds back to the DB37 - not somewhere else. Unless you are using a wiring diagram for say the relay board, in which case follow that.

Thanks

I will then wire them all back to the groundpins on DB37

If you are using a relay board, can an additional wire from the engine block go to the sensor ground on the JP1 terminal for the coolant, TPS and air?