Honda - All DTC Test Certification?

I have Honda insight 2009 car. I got "All DTC Test Certification" report from Honda dealer after i checked my car for any electrical faults. They said no faults found.

In that report i see under DTC Code column: "No DTC was found" under each & every System in my car.

Please tell me what that mean (No DTC was found)?

DTC is Diagnostic Trouble Code, of which they found none.

You didn't answer the question. What does it mean?