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Hyundai Tucson: Ignition System - Description

Hyundai Tucson - Fourth generation (NX4) - (2020-2023) - Workshop Manual / Engine Electrical System / Ignition System / Ignition System - Description

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.

Troubleshooting

Schematic Diagrams

Schematic Diagrams

On-vehicle- Inspection

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     On-vehicle- Inspection

    Inspect ignition coil assembly and Perform spark test Check for DTCs. WARNING If a DTC is present, perform troubleshooting in accordance with the procedure for that DTC. (Refer to DTC guide) Check if sparks occur. Without diagnost

     Connector assembly status test- Troubleshooting

    Connector assembly status test Disconnect the ignition coil connectors (A) and reinstall it. Test for changing position of each ignition coil Ignition coil w/ misfire code Ignition coil w/o misfire code WARNING Do not move wi

     Engine Cover

    Removal Turn the ignition switch OFF and disconnect the battery (-) terminal. Remove the engine cover. (Refer to Engine Mechanical System - "Engine Cover") Disconnect the ignition coil connectors (A). WARNING When remov

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     Compressor - Installation

    Make sure that the compressor (A) mounting bolt of the correct length is screwed in. Tighten the mounting bolts in the specified tightening order. Install in the reverse order of removal. f you install a new compressor, drain

     Motor Driven Power Steering - Removal and installation

    WARNING When lifting a vehicle using a lift, be careful not to damage the lower parts of the vehicle (floor under cover, fuel filter, fuel tank, canister). (Refer to General Information - "Lift Point") Loosen the front wheel nuts

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