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Home > Driving your vehicle > Idle Stop and Go (ISG) system > To help understand the ISG

To help understand the ISG

  • Q. What is ISG? And what is the function of it?

    A. ISG is an abbreviation of Idle Stop and Go. The feature contributes to protecting the environment and improving fuel economy by automatically shutting down the engine when a vehicle comes to a stop.

  • Q. How does the ISG work?

    A. In the case of Auto Transmission (AT)/Dual Clutch Transmission (DCT)/intelligent Manual Transmission (iMT), if a driver presses the brake to stop the vehicle, the engine is automatically shut off; if the driver releases the brake, the engine will restart. For Manual Transmission (MT), if a driver releases the clutch pedal in the N (Neutral) position, the engine is shut down; if the driver steps on the clutch pedal the engine will automatically restart. The ISG is operated only when the seat belt is fastened. The driver doesn't need to use the key or press the ENGINE START/STOP button for restarting.

  • Q. Does the ISG work every time?

    A. No, it doesn't. The vehicle selectively operates ISG considering all safety matters. It does not function when the vehicle is driving on steep hills (not applied to MT), and the vehicle requires air conditioning/ heating or battery protection. For additional information on the safety conditions, please refer to the Owner's manual.

  • Q. How can I deactivate the ISG feature?

    A. You can just press a button “ISG OFF”. Note that the ISG feature is reactivated if you start the engine using your key or the ENGINE START/STOP button.

  • Q. The engine restarted even if I didn't operate any of it. Why did it happen?

    A. If required, the feature automatically starts the engine after monitoring the vehicle conditions including the battery and the air conditioning system.

  • Q. Does the air conditioning work if the engine is shut down by ISG?

    A. No, it doesn't. In that case, the vehicle operates only the blower. If the vehicle's interior temperature is too warm, the engine will restart to operate the air conditioning.

  • Q. Can the frequent use of ISG lead to undermining the durability of vehicle components?

    A. Not at all. We have enhanced the durability and performance of parts - such as a starting motor (starter), batteries and others- required for ISG. Also, for your safety, we applied safety logic to the system.