2010 Hyundai Accent won't start

I am a journeyman mechanic. A 2010 Hyundai Accent GL Sport won't start. Ignition key on; the little amber car with the key inside is lit. I checked the oxygen sensor; 89 ohms between 2 connectors, and no connection to the third wire. There is power to the oxygen sensor. All the fuses and relays are good. 10 amp fuse to the ECU is good. There is ~ 900 ohms resistance between 2 connectors on the crankshaft sensor. There is no battery voltage to the crankshaft sensor with the ignition key on. I have made no further checks. Do you have any suggestions? Much appreciated.