check the harness going to the speed board, pay attention to the fine guage wires, also to their location, if these wires are routed on the outside of the board facing the tub you need to move the tub towards them paying attention to where the tub would strike them, then wiggle them at this spot
the wire in the insulation is so fine it can break without cutting through the insulation
i've seen many give the 5 second run before spitting out errors and almost always find a wire broken where the tub could have impacted it