2002 Sportsman 700 Speedometer shows”E”

I am new to the forum and recently scored an 02 Sportsman 700. Wouldn’t start and speedo displayed E. A buddy was in the process of a teardown of a similar twin so tried his Ignition controller and mine fired right up – so there was the starting issue. We also relaced speedometer pods and his worked just fine. My main question is once the igniton controller box goes does it take out the speedo or can it somehow be flashed and remove the error codes. Ever had this issue? Have not spoken to a dealer yet and searched the threads for a similar problem – this just seemed like a more efficient way to spendd my time. Also are all of the Manual links disabled? I cannot seem to load any of them. Thanks in advance for any help……..