Hyundai Santa Fe: Ignition System / Description and operation

The ignition coil is a kind of small transformer that transforms the battery voltage to 30 kV or more to create a spark in the spark plug gap in the cylinder.

The igniter embedded in the ignition coil includes the power transistor and it is an electronic switch whose electric current is controlled by the Engine Control Module (ECM) signal.

The ignition timing is controlled by the ECM and the standard ignition timing data depending on the engine operating condition is stored in the ECM memory.

The engine operating conditions (speed, load, warm-up state, etc.) are detected by the various sensors.

Based on these sensor signals and the ignition timing data, when the ECM applies the ignition signal to the ignition coil for a certain period of time, igniter is energized and current flows and rises gradually to the primary coil and the magnetic filed is produced.

When the current in the primary coil is cut off by the ignition signal of the ECM, the rapid change of the magnetic flux by the mutual induction action is induced to the secondary coil and high voltage is generated depending on the coil winding ratio.

This high voltage generated from the secondary coil is caught in the spark plug gap and discharges as the electric field is destroyed to generate a spark.

Ignition System

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Troubleshooting

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Other information:

Hyundai Santa Fe (TM) 2019-2025 Owner's Manual: System operation

Operating conditions Smart Cruise Control will operate when the following conditions are satisfied. Basic function The gear is in D (Drive) The driver’s door is closed EPB (Electronic Parking Brake) is not applied Your vehicle speed is within the operating speed range -- 5~110 mph (10~180 km/h): when there is no vehicle in front -- 0~110 mph (0~180 km/h): when there is a vehicle in front ESC (Electronic Stability Control), TCS (Traction Control System) or ABS is on ESC (Electronic Stability Control), TCS (Traction Control System) or ABS is not controlling the vehicle Engine rpm is not in the red zone Forward Collision-Avoidance Assist brake control is not operating Remote Smart Parking Assist brake control is not operating Information At a stop, if there is no vehicle in front of your vehicle, the system will turn on when the brake pedal is depressed...

Hyundai Santa Fe (TM) 2019-2025 Owner's Manual: Additional safety precautions

Passengers should not move out of or change seats while the vehicle is moving. A passenger who is not wearing a seat belt during a crash or emergency stop can be thrown against the inside of the vehicle, against other occupants, or be ejected from the vehicle...