It tells the computer what to do.
The automatic transmission is controlled by your computer. That is why having a good tuner can really benefit an automatic transmission. Change shift points and increase shift change time is all controllable through the CPU.
This is nothing new. It has been this way since the mid eighty's on a lot of different cars. About 97 up I think 98% of the automatic transmissions went this way.
It's not really a bad thing because it does work very well.
2012-candy red- V-6 MCA, Automatic Trans. CFM Valve cover breather. MMD blackTail light trim.Magnaflow axle back street mufflers, JLT oil catch can.MMD hood struts.
Airaid Cold Air intake. red caliper covers, 3.7L performance engine cover, Flat black hood spears.Boss 302 strut brace, CDC rear panel, Trunk Cargo net,--Dash carpet cover,
Viser stickers to cover ugly yellow warning crap,Aluminum driveshafft and Swarr Bar.