PCM not recognized after lightning strike

There's no way to test a computer, (other than with the special test benches where they manufacture them). All you can do is check for 12 volts on all the power wires, (there's usually three or four), test all the ground wires, (there's usually four), then if those are all okay, test for proper voltages and signals at the input wires. If all of those are okay but you don't get the desired outputs, suspect the computer. Substitution will verify proper operation, but with a lightning strike you can expect multiple computer failures so you may be finding more and more things start to work as you replace more of them.