timing sensor test

[Jim & Michelle]

I'm trying to track a no spark condition in my 87, 5k.  So far I put together a low voltage LED test light, 1. checked the hall sender, test light flickered. (o.k.). 2. Run a test at the coil transistor connector, no flashing light. I've got a manual ordered but in the meantime I know this either means a bad transistor in the icu, or maybe the timing sensor or rpm sensors aren't sending any info to the icu.  How can I check the sensors to see which is the culprit?
OH yeah, the code was giving a hall sender code (2113). Am I on the right track?

Jim