Those instructions work on our '98 & 2003 Accords. Stabmaster's '97 Prelude might have an aftermarket keyless system, so it'll have it's own procedure.

I tried that procedure for grins on the 2003 Accord, not knowing what to expect. But it worked, so I guess I'd give it a try for the 2003 Civic. Unless you think it's a non-factory keyless system...