Hyundai Sonata: SMART mode / Limitation of SMART mode

Hyundai Sonata LF 2014-2019 Owners Manual / Driving your vehicle / Drive Mode Integrated Control System / SMART mode / Limitation of SMART mode

The SMART mode may be limited in following situations. (The OFF indicator illuminates in those situations.)

The driver manually moves the shift lever : It deactivates SMART mode. The vehicle drives, as the driver manually moves the shift lever.
The cruise control is activated : The cruise control system may deactivate the SMART mode when the vehicle is controlled by the set speed of the smart cruise control system. (SMART mode is not deactivated just by activating the cruise control system.)
The transmission oil temperature is either extremely low or extremely high : The SMART mode can be active in most of the normal driving situations. However, an extremely high/ low transmission oil temperature may temporarily deactivate the SMART mode, because the transmission condition is out of normal operation condition.

Various driving situations, which you may encounter in SMART mode

The driving mode automatically changes to ECO mode after a certain period of time, when you gently depress the accelerator pedal (Your driving is categorized to be mild.). The driving mode auto ...

Cruise Control

Cruise Control Operation 1. CRUISE indicator 2. SET indicator The Cruise Control system allows you to drive at speeds above 20 mph (30 km/h) without depressing the accelerator pedal. WARNING Take th ...

Other information:

Hyundai Sonata LF 2014-2019 Service Manual: Alternator Description and Operation
Description The Alternator has eight built-in diodes, each rectifying AC current to DC current. Therefore, DC current appears at alternator "B" terminal. In addition, the charging voltage of this alternator is regulated by the battery voltage detection system. The alternator is regulated by th ...

Hyundai Sonata LF 2014-2019 Service Manual: Master Cylinder Repair procedures
Removal 1. Turn ignition switch OFF and disconnect the negative (-) battery cable. 2. Remove the air cleaner assembly (A). 3. Disconnect the brake fluid level switch connector (A). 4. Remove the brake fluid from the master cylinder reservoir with a syringe. � ...