1994 suzuki sidekick 16v wont start

[pen25]

ok well i was out messing with this and was thinking about code 41. and i came back in and read more and remembered about the tach question. the tach doesnt move. so read some more and found that code 41 means tach signal isnt being generated or seen. i am thinking this could be a noise sensor or wiring. i can cot check the wiring but is there a quick down and dirty on testing the noise supressor?