Induction icing is not the problem in FI engines that it was in carbureted engines because carbs relied on a venturi to mix the fuel and air proberly and multipoint fuel injectedengines do not. The pressure (and subsequent temperature) drop across the venturi was often enough to condense the water out of the air, causing ice to accumulate. Carbureted piston aircraft engines have a carb heat **** to prevent the problem.

While there is a pressure drop across a throttle body, it is nowhere near the drop that occurs with a carb venturi, so a heater is less likely to be needed to prevent ice from forming. You are correct that heated intake air would result in a considerably less dense charge and a richer mixture. This is compensated for by the sensors in the system.

Remembering that the Land Rover is built to endure climate extremes, the TBheatermaybe missed under extreme circumstances, but I've never heard of anyone running into problems by bypassing it.

Dave