How/Which sensor activates the TSC ecu signal...does it come directly from the TVSV?
It works the other way around.
The ECU is not using just a single sensor.
It uses knock sensor, air temp sensor, coolant temp sensor, etc...
If the condition is right, the ECU activates the t-vsv by sending 12v to the t-vsv via tpc wire.
The vsv then opens and bleeds air out of the WG actuator and allows car to boost more.
(The t-vsv is normally closed)
BTW, it's T
PC, not TSC