Hyundai Tucson Owners & Service Manuals

Hyundai Tucson: Idle Stop and Go (ISG) System / 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 assistance.

    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 hig ...

    Calibrating the Battery Sensor
    If the AGM battery is reconnected or replaced, the ISG system does not operate immediately. If you want to use the system, the battery sensor needs to be calibrated following the procedure. 1 ...

    Other information:

    Hyundai Tucson (NX4) 2022-2026 Service Manual: Evaporator Temperature Sensor
    - Description The evaporator temperature sensor will detect the evaporator core temperature and interrupt compressor relay power in order to prevent evaporator from freezing by excessive cooling. - Inspection 1.Turn the ignition switch ON. 2.Turn the A/C swicth ON. 3.Measure resist ...

    Hyundai Tucson (NX4) 2022-2026 Service Manual: PTC Heater
    - Description The PTC (Positive Temperature Coefficient) heater is installed at the exit or the backside of the heater core.The PTC heater is an electric heater using a PTC element as an auxiliary heating device that supplements deficiency of interior heat source in highly effective diese ...

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