Glitch

I have been running my R32 Skyline GTR (RB26) on V88 plugin for more than a year with no issues, but had not yet configured my A/C. I finally got around to doing that recently, and have found that when my A/C fan cycles on or off it will occasionally cause an ATTESA fault and turn on my 4WD light. It mostly happens when the car is idling, but will sometimes happen at cruise as well. I know the 4WD light was an issue with TPS voltage on some cars, but I am fairly certain that I have the jumper installed for that (I will verify and update the post). The light never came on before I set up the A/C. Any ideas? Thanks, Mitch