The audible click of the switch is simply a mechanical action resulting from the control lever being placed into the start/choke position. This contact supplies voltage to a diode in the switch which temporarily activates the solenoid until the saw is running and under the control of the ECM. The switch will still make an audible click when activated by the control lever even if it is bad due to a faulty diode. The procedure for testing the diode/proper switch function is found on page 64.The microswitch. The service info. states, test from the red to the black and look for 10 ohms. Thats from the solenoid plug, to the side plug. ? Those 2 wires (red/black) are both fine with zero resistance from the test terminals, THRU the solenoid connector, and all the way to the terminals ((spade & eyelet). Cross them to test? was a mystery. Page 65-66.
BTW, a v3.0 upgrade kit from an honest dealer is around $120..., $117 and change from my area dealer through Bryan Equipment when I checked earlier in the thread.