Be sure Battery is fully chargedCables are clean & tight
Test PIN 85 for Ground - with key in Crank position to see if the PCM is sending a signal
You can temporarily Ground the Starter Relay PIN 85 to see if it cranks
If so, then the PCM is not supplying a signal
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Then you have a bad ECM / PCM & it needs to be replaced
Use of DRB Scan Tool will be needed
here are procedures
Many things can cause PCM failureIgnitionCoil/sInjectorsVoltage (Alternator, Battery, Voltage Regulator, Spikes)Battery cables & connectionsGroundsBad or low dollar ECM / PCM purchased
You didn't mention if Check engine light came on prior or if any Trouble Codes were retrieved.If there were, then that should give you some help on the cause
If not, then I would try a different Parts Store ECM / PCM reman
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