The vehicle must be on a level surface when checking the coolant level.
It is normal to see coolant moving in the upper coolant hose return line when the engine is running.
Check to see if coolant is visible in the coolant surge tank. If the coolant inside the coolant surge tank is boiling, do not do anything else until it cools down.

If coolant is visible but the coolant level is not at or above the mark pointed to, add a 50/50 mixture of clean drinkable water and DEX-COOL coolant.
Be sure the cooling system is cool before this is done.
What to Use
How to Add Coolant to the Coolant Surge TankAutomatic Transmission
Continuously Variable Transmission (CVT)
The CVT is electronically controlled to produce maximum power and smooth operation.
A display in the instrument cluster indicates the selected range.
P (Park): This position locks the front wheels. Select P (Park) only when the
vehicle is stationary ...
Engine Compartment Overview
Windshield Washer Fluid Reservoir. See Washer Fluid on page 10-19.
Engine Coolant Surge Tank and Pressure Cap. See Cooling System on page 10-13.
Engine Oil Dipstick. See Engine Oil on page 10-8.
Engine Oil Fill Cap. See Engine Oil on page 10-8.
Engine Cooling Fan (Out of View). See Co ...
Passenger Safety Belt Reminder Light
There is a passenger safety belt reminder light near the passenger airbag status
indicator. See Passenger Sensing System on page 3-25.
When the vehicle is started, this
light flashes and a chime may come on to remind passengers to fasten their safety
belt. Then the light stays on solid until ...