STA Signal Goes To ECU And Tell ECU Engine Is Cranking And Getting Ready For Start.....
The STA Wire See +12v When You ARe Cranking...MEans +12v SIgnal From Your Starter SOlenoid To STA...
As Soon As Car Started The +12v Cut Off.....!!!
For SPD...There's A PIN In Your ECU Name SPD......It Takes A TYpe Of Signal Which Tells ECU The Current Speed Condition And Its How ECU Limits You Around 180kmph....!
The Signal I Am Talking About In Your Meter Is That Same SPD Signal Which Meter Generates........The Gear Box Drives SPeedometer Either WIth Cable Type Or Sensor Type ....The Meter Generates That Pulse Which Is Then Feed To ECU...!!
As I Remem..Its Purple Color Wire With Strip Of White I Guess In Your Meter Grip ....Just Connect And Trace It To Meter And If You Find Pin For It....Just Connect It To ECU SPD And SPD Code Will Disappear.....!!
Gearbox Directly Won't Generate That Signal..Keep In Mind...
The FC Pin On ECU Is For Your Fuel Pump Relay ...It Activates Fuel Pump Relay s You Crank......! Will Never Work If STA Is Not COnnected...Tricky Part...YES......Some People Connect And It Don't Work..REason Is STA Wire Is Totally Forgotten...
So Test This Pin On ECU And Check The Output While And After Start......!!! The Hook It Up To Activate Relay......! Test For Working And Hook It Up...!!!