I have a '91 240sx with auto trans. Problem is it won't shift into overdrive. I run diognostics according to TSM (without consult) and I am not sure that I am inturpiting the signal right. When I go through the proseedure the OD light comes on then blinks 10 times, after a second or two it repeats this by coming on then blinking 10 times. ALL judgement flickers are the same which says that all circuits that can be confirmed by self-diagnosis are ok. Am I reading this right or should I be counting the first light as a "flicker"