The way I understand the Sport Hybrid it when the ICE works it drives the front wheels, Electrical drives the rear wheels.
I have seen cases where both front and rear wheels are working ( ICE and Electrical) but most of the times only one pair is working.
In the winter, Snow is there a way to force the car to go AWD all the times?

 

I think only the +19 RDX has an IDS for snow mode. The RLX does have Reactive Force Pedal (page 396 18 RLX Sport Hybrid owner's manual). It is suppose to add more resistance to the gas pedal to aid in slippery conditions so you don't apply too much power to the wheels.

"The Reactive Force Pedal is designed also to help prevent your wheels from possibly spinning out due to excessive throttle, and help make the vehicle start smoothly when roads are slippery due to ice, snow, excessive rainfall, etc. "

Other than that, it is up to the computer to decide how to distribute the power to the wheels depending on road conditions, tire traction available, and driver's inputs.

 

IMHO the Sport Hybrid system is absolutely amazing at knowing what is just the right amount of traction assistance to get through the slippery weather. Even without dedicated snow tires, the traction is spectacular. The rear end can be momentarily tail happy but the system catches itself so fast that turning into a slide is for the most part needless. You have to relearn some of your innate driving skills to depend on it working, but it does an amazing job. It is AWD or FWD when you need it. I have never felt compelled to get dedicated snow tires but I don't live in Canada where from November to April, snow covered roads are the norm. If I lived there I would do that for any vehicle. I can only imagine the traction these cars have in those conditions with dedicated snow tires. Constant AWD isn't always needed.

 

When the ICE if off which happens it is RWD, right?
I was driving yesterday in the snow and and turned on the wheels display, I saw many times that the ICE is off and only Rear wheels are working, when cruising all where off.

 

I think it depends on what is highlighted when the power distribution is displayed on the navi or M.I.D. I think is shows blue for power and green for regen, foot on brake stops, tq vectoring, hill grade logic control, and 3.5L recharge. Depends if the 1-3 electric motor(s) or 3.5L engine is highlighted to determine where the power is coming from. The ICON for the 3.5L engine should be highlighted when it is on and providing power to the front wheels and/or battery pack. The 1, 2, 3, or combo of the electric motors should be highlighted when the electric motors are providing power with or without the I.C.E.

 

The car is sketchy in the snow when it goes to ev mode (rwd) mid turn, even with snow tires. The only way to keep it awd is sports mode on or traction control off. I drove with tc off and it was quite predictable. Sports mode keeps the revs too high.

 

Could you elaborate on traction control.
I understand that in sports mode ICE is always on, thus FWD or AWD.
What about disabling the TC, what does it do in this case?