Viewed looking into ECU header (or wire side of loom connector)

 

G4+ Atom Header

 

Note: Gnd Out is also known as Sensor Ground.

*Note: Version 3 or newer G4X Atom ECUs support Knock control which is fed into the ECU through pin 6. Versions prior to 3.0 do not have knock control hardware.

 

G4S Pin Numbering