There are also cars that use an adjustable swash plate compressor. Basically it changes the volume of coolant being pumped, depending on the required pressure in the system.
That means it will draw less energy on low cooling demand than on high demand.
Don't know about yours, maybe you could ask Toyota.
This shows roughly how it works
One-Way Swash Plate Internally-Controlled Type | Compressors - TOYOTA INDUSTRIES CORPORATION