94 accord won't start. D4 light flashing.

hi. i'm new to these forums and i appreciate any help i could get.
i have a 94 accord auto. it usually starts fine, but every now and then it will not start. when that happens, the D4 gear light flashes (even though it's in park). i've found that if i let it sit for a few minutes, while continuously turning the key to the ON position, the D4 light will stop flashing eventually, and the car starts right up.
i should also note, when this problem occurs, the engine cranks, but it doesn't turn over. not until the d4 light stops flashing.

could this be the main engine relay (aka fuel pump relay)?