i have a 93 accordand the d4 light was blinking all the time. i have no problem with it starting. i got another tcu from a salvage yard and installed it. with the old tcu it seemed to only have 2nd and 3rd gear and with the other one it seems to shift from 1st to 3rd. i jumpered the connector and the d4 light flashes 7 times. the d4 light doesn't come on till i try to go forward. i have drained and refilled tranny. any help would be great.