Hyundai Tucson Owners & Service Manuals

Hyundai Tucson: Idle Stop and Go (ISG) System / Conditions that Restart the Engine

The engine is automatically restarted if:

  • The brake vacuum pressure is low.
  • The engine has stopped for about 5 minutes.
  • The air conditioning is ON with the fan speed set to a certain high level.
  • The front defroster is ON.
  • The battery is weak.
  • The cooling and heating performance of the climate control system is unsatisfactory.
  • The vehicle is shifted to P (Park) or R (Reverse) when Auto Hold is activated.
  • The door is opened or the seatbelt is unfastened when Auto Hold is activated.
  • The EPB switch is pressed when Auto Hold is activated.

The Auto Stop () indicator blinks in green for 5 seconds on the instrument cluster when the engine is restarted.

WARNING

When the engine is in Idle Stop mode, the engine may restart without the driver taking any action. Before leaving the vehicle or working in the engine compartment, turn off the engine by moving the ignition switch to the OFF position, shifting to P (Park), applying the parking brake, and taking the key with you when you leave the vehicle.

    ISG System Off
    Type A Type B Press the ISG OFF button to turn off the ISG system. The ISG OFF button indicator illuminates. To use the system, press the ISG OFF button again. ...

    ISG Malfunction
    ISG system may not operate if: The Auto Stop () indicator illuminates in yellow on the instrument cluster. The ISG OFF button illuminates. Contact an authorized HYUNDAI dealer for ...

    Other information:

    Hyundai Tucson (NX4) 2022-2025 Service Manual: Manifold Absolute Pressure Sensor (MAPS)
    - Description Manifold Absolute Pressure Sensor (MAPS) is a speed-density type sensor and is installed on the surge tank. It senses absolute pressure of the surge tank and transfers the analog signal proportional to the pressure to the ECM. By using this signal, the ECM calculates the intak ...

    Hyundai Tucson (NX4) 2022-2025 Service Manual: Front Wheel Speed Sensor
    - Components 1. Front wheel speed sensor2. Front wheel speed sensor connector - Removal     • Be careful not to damage the parts located under the vehicle (floor under cover, fuel filter, fuel tank and canister) when raising the vehicle using the lift.(Refer to Gen ...

    © 2023-2025 Copyright www.htucson4.com