I could be wrong... wouldnt be the 1st time... but... im pretty sure, that in order to import a diesel engine into the U.S. ECONOMICALLY, it has to be 25 years or older. Toyota could in theory import the parts to a diesel motor, and have them assembled here, but there isnt enough of a market for diesels here to make that economically feasible, at least not in half ton p/u or suv form...
The big 3 are in bed with big oil, so do the math on that....
now... also figure in that the entire northeast is heavy into "heating oil" aka "dirty diesel", whereas the rest of the world mainly uses natural gas, propane, wood, or coal....
imagine if half the vehicles in the country started running on diesel... heating fuels would go through the roof, and the gubmint would have to subsidize homeowners as well as big oil...
It doesn't make sense for Toyota to bring the Toyota diesel to the US market for the same reasons why the FJ cruiser is no more.
US regulations on everything from safety to fuel consumption.
From what I've heard Toyota is more focused on 8 and even 12 speed transmissions to achieve the EPA targets set in the coming years. Look to see what they are already doing with the Lexus line...
This is also the reason why the new Nissan diesel is a baby Cummins in the US. Smart idea, to just use a motor that's already GTG in that country.
-A