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Hi there. Welcome to our site.
I can probably help you, but I'll need a bit more information before we can start:
Are there any codes?
Is there injector pulse?
OK. Make sure the battery has a full charge before you try to pull codes. Then check both ECM fuses; 20A fuse under the hood and 10A fuse in the dash. Also check the data link connector terminal 16 for voltage and terminal 4 for ground. Also, I strongly recommend you get yourself a Noid light (under $20 at most auto parts stores) to check for injector pulse.
Please let me know what you find.
No. The ECM doesn't provide power to either the fuel pump or the injectors. It provides ground to the control side of the fuel pump relay to energize it; then grounds each injector in sequence based on signals it gets from the cam and crank sensors.
If the battery is fully charged and fuses and connector values are OK, and you still can't communicate with the ECM, then it is probably bad.