Hyundai Tucson: 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
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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
SEE MORE:
Boost Pressure Sensor (BPS)
Description
Boost pressure sensor (BPS) is installed on top of intercooler output pipe to
measures the pressure of
supercharged air in the turbocharger.
Specification
Circuit Diagram
Harness Connector
Inspection
Connect th
Quarter Fixed Glass
Components
Quarter fixed glass
Removal
WARNING
When removing with a flat-tip screwdriver or remover, wrap
protective tape around the tools to prevent
damage to components.
Put on gloves to prevent hand injuries.
WARNING
Tak
Information
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- Hyundai Tucson - Fourth generation (NX4) - (2020-2023) - Workshop Manual