LS400 MAF - COR Signal?

[ALI1UZLUX]

Hi, I have LS400 MAF (Alloy Body type) and am running COR relay for fuel pump.
I need to know which wire on the MAF to splice into for the COR.
There are 4 wires,
E2 common earth X
THA Air Temp X
KS Air flow meter
VC Throttle position sensor Air flow meter

Not sure if is KS or VC, and don't have multi meter to check wire vs flap.

 

[ALI1UZLUX]

Or is it the earth I use?

 

[cruising]

No
Ecu signal you use

 

[ALI1UZLUX]

All good, FC pin on ecu