I got into an accident and had my car repaired. now my cel, maintence required light, and abs light is on. the mechanic said the ecu just need to be reset. so i tried to. i dissconected the battery for 5/15/then 30 min. i also disconnected the backup fuse(the blue 15). still to no avail all my lights are on. any suggestions would be very helpful. I got 94gsr