Spark does not turn on

Hello a pleasure: I have a problem with my spark lt year 2008, it turns out that it does not turn on the light of Check, the benzine bomb does not work, it does not inject, it has no spark, I thought it could be the crankshaft position sensor, but it is not. I think that the computer is not arriving, but I do not have how to know the pins where each color and the voltages of this go. Now if they could help me with ideas, that it could be, I would appreciate it an enormity. Thank you in advance.