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Its not about simple programming...
As I said above, the button to switch maps needs to be a signal on the PT-Can, The DTC button presses send signals to modules on the PT-Can... as the PROcede is only on the powertrain canbus (engine and powertrain related modules)... the steering wheel is on the K-Can I believe. The steering wheel button signals most likely DO NOT make it to the PT-can.
what you are asking for is not possible with just simple programming...
-Rick
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