Section 5, page 108 is all that's in the manual:
SPORT/CUSTOM mode SPORT/CUSTOM mode manages the driving dynamics by automatically adjusting the steering effort, and the engine and transmission control logic for enhanced driver performance. ? When SPORT/CUSTOM mode is selected by pressing the DRIVE MODE button, the SPORT/CUSTOM indicator (orange color) will illuminate. ? Whenever the engine is restarted, the Drive Mode will revert back to COMFORT mode. If SPORT/CUSTOM mode is desired, re-select SPORT/CUSTOM mode from the DRIVE MODE button.
? When SPORT/CUSTOM mode is activated: - The engine rpm will tend to remain raised over a certain length of time even after releasing the accelerator - Upshifts are delayed when accelerating ? When CUSTOM is selected, ESC off indicator lights up (ESC off state 1)
? ? NOTICE In SPORT/CUSTOM mode, the fuel efficiency may decrease.
ECO mode When the Drive Mode is set to ECO mode, the engine and transmission control logic are changed to maximize fuel efficiency. ? When ECO mode is selected by pressing the DRIVE MODE button, the ECO indicator (green color) will illuminate. ? If the vehicle is set to ECO mode, when the engine is turned OFF and restarted the Drive Mode setting will remain in ECO mode.
? ? NOTICE Fuel efficiency depends on the driver's driving habit and road condition.