2G's critical adjustment is the Idle Position Switch that's part of the TPS.The manual has you place a 0.0177" (0.45mm) feeler guage between the stop screw and the throttle pulley to open the butterfly and then adjust the TPS right to where the IPS (pins 3 and 4) switches from closed to open. Then they have you verify that the TPS (pin 2 and 4) reads between .4 and 1V while the feeler guage is still in place.Anything in that range is ok as long as the IPS is adjusted correctly.There is no way to adjust the TPS voltage independantly of the IPS on a 2G that I can see.
it's not critical what you read for TPS values as long as the IPS opens at the correct point, the throttle opens all the way with the pedal down, the cable isn't too tight that it holds the throttle open, and the TPS doesn't drop out or spike as you move the throttle.The actual spec for voltage values on the 2G TPS at idle can be anywhere from 0.4 to 1.0v.