Disconnect the ECU

Ground pin 20, then pin 21 of the ECU
bulletPump doesn't run?   Either or both relays is/are bad; stop and repair
bulletPump runs? Pump relay is OK; proceed

Remove ground from pin 20; leave pin 21 grounded, then ground pin 18

bullet Fuel injectors do not click?  Fuel System relay is bad, or corrosion in the large round connector; stop and repair.
bulletFuel injectors click?  Proceed
bullet Check for voltage on pin 5 of the air mass meter connector
bullet  No voltage?  System relay is bad;  stop and repair.
bullet  Voltage OK?  System relay is OK: proceed

Reconnect ECU. Connect meter (dc volts, 3 volt scale)  across a fuel injector.
Crank engine.  0.3 to 1 volt indicated, injectors are clicking, pump is running?
bullet If YES TO ALL, the fuel system is working well enough that the engine should at least start  (although the Air Mass Meter could be bad).
bulletIf no voltage, no injector clicks and pump does not run, then something is probably wrong in the crank sensor circuit.
bulletIf only the pump runs or only the injectors show voltage and click, suspect the ECU.
bulletNOTE: ECU failures are NOT common; the problem is almost always something simpler, such as a relay, or corrosion.

AND A FINAL NOTE: I once read voltage over and over and over again at the injectors - the voltage was there, but corrosion in the round connector prevented any significant current from flowing.  SO be sure that you have current as well as voltage - make sure the injectors click.  They may be hard to distinguish when the engine is running or cranking, but you should definitely hear them in the pin 18 test.