Ifd540 to vizion 385 when a/p on efis selected and coupled to approach always flies left of course with a right deviation of indicator. The autopilot joins and tracks a heading perfectly, tracks course on magenta line but during ils or lpv after faf plane stays left of course even though it is being told to fly right one full bar. Tried a/p localizer gain but doesn’t seem to have any effect, any other settings to look at? Is the error in steering commands from ifd540 or does the efis output commands to a/p? Or is sv-arinc involved?