I can't believe no one ever answered this before in previous topics. I don't want to hear I can ground the solenoid to anywhere because I need to wire it to the ecu. I need the pin location on the ecu. Thanks.

 

vtec solinoid ground doesnt go to the ecu. it is grounded along with the rest of the engine harness either on the block or frame. i dont believe there is a ecu pin for it, and if there is it would be dumb to run a wire to the ecu just to ground it to the frame later. am i missing something??? why do you need it ran to the ecu?

 

The ground is the thermostat housing. (According to the wiring harness in my car)