1998 Johnson Evinrude "EC" 150, 175 FFI Service Manual, P/N 520211, Page 134Get this manual
Crankshaft Position Sensor Resistance Test _
rn Measure resistance of sensorSensor Resistance 8001000 D
Throttle Position Sensor Resistance Test
[] Contact meter leads to red and black wire sensor pinsMeter should read greater than 3000 DMove one meter lead to green wire pin and move sensor arm smoothlymeter reading should change evenly with arm movementRetain meter lead on green wire pin and alternate the other lead to the other sensor pinRepeat procedureany erratic meter reading change indicates sensor problem
Air Temperature Sensor Resistance Test