You won't get any reading if you try reading the voltage of the TPS while the engine's running - in fact, it'll probably stall and you might pop something...

You can however get a reading from it with the ignition at II with the engine off so you can get see if there are any permanent flat spots. Also make sure you're counting pins from the correct side or you'll measure or short something else!

Also, pin 1 is earth for the ECU which operates at 12 volts, not earth for the TPS which only uses 5 volts! The TPS takes a 5 volt feed from pin 30, which goes through the TPS and returns to the ECU on pin 17, and is grounded on pin 11. So if anything you should be measuring the voltage 30 and 17 to get the output of the sensor.

The L8 will use the lowest stable voltage as its base throttle setting, usually around 0.3v and open linearly to about 4.5v at 82degrees throttle angle (wide open).

The engine will run (and start) without the TPS connected, but there'll be no enrichment when you open the throttle.

Best idea is to get someone with the right diagnostic equipment to plug that in as you could easily pop something accidentally - the proper kit will also work while the engines running as some problems won't become apparent unless you're actually driving.