Hyundai Elantra Owners and Service Manuals

Hyundai Elantra: Ignition System / Ignition Coil

Hyundai Elantra (CN7) 2021-2025 Service Manual / Engine Electrical System / Ignition System / Ignition Coil

Description and operation
Description
An ignition coil is an induction coil in an engine's ignition system which transforms the battery's low voltage to the high voltage needed to create an electric spark in the spark plugs to ignite the fuel. Coils have an internal resistor while others rely on a resistor wire or an external resistor to limit the current flowing into the coil from the battery 12V supply.
Troubleshooting
Troubleshooting
Connector assembly status test
1.
Remove the connector (A) and reinstall it.

Test for changing position of each ignition coil
A : Ignition coil w/ misfire code
B : Ignition coil w/o misfire code
   
•
Do not move with spark plug at the same time (move the ignition coil only)

Specifications
Specification
Item
Specification
Primary Coil Resistance (Ω)
0.75 ± 15% [20°C (68°F)]
Secondary Coil Resistance (kΩ)
5.9 ± 15% [20°C (68°F)]

Schematic diagrams
Circuit Diagram

Repair procedures
Removal
1.
Turn ignition switch OFF and disconnect the negative (-) battery cable.
2.
Remove the engine cover.
3.
Disconnect the ignition coil connector (A).

   
•
When removing the ignition coil connector, pull the lock pin (A) and push the clip (B).

4.
Remove the ignition coil (A).
Ignition coil installation bolts :
9.8 - 11.8 N.m (1.0 - 1.2 kgf.m, 7.2 - 8.7 Ib-ft)

Installation
1.
Install in the reverse order of removal.
Inspection
1.
Measure the primary coil resistance between terminals 1 and 2.

Standard value : 0.75Ω ± 15%

    Repair procedures

    On-vehicle InspectionInspect ignition coil assembly and Perform spark test1.Check for DTCs.    • If a DTC is present, perform troubleshooting in accordance with the procedure for that DTC...

    Spark Plug

    Description and operation DescriptionA spark plug is a device for delivering electric current from an ignition system to the combustion chamber of a spark-ignition engine to ignite the compressed fuel/air mixture therein by means of an electric spark, while containing combustion pressure within the engine...

    Other information:

    Hyundai Elantra (CN7) 2021-2025 Owner's Manual: Battery saver function


    The purpose of this feature is to help prevent the battery from being discharged. The system automatically turns off the parking lamp when the driver turns the vehicle off and opens the driver-side door. With this feature, the parking lamps will turn off automatically if the driver parks on the side of road at night...

    Hyundai Elantra (CN7) 2021-2025 Owner's Manual: Protecting your vehicle’s finish


    Washing To help protect your vehicle’s finish from rust and deterioration, wash it thoroughly and frequently at least once a month with lukewarm or cold water. If you use your vehicle for off-road driving, you should wash it after each off-road trip...

    Categories

    Rear center seat belt

    When using the rear center seat belt, the buckle with the “CENTER” mark must be used.

    WARNING

    Make sure that the seatback is locked in place when using the rear center seat belt.

    If not, the seatback may move when there is a sudden stop or collision, which could result in serious injury.

    read more

    Copyright © 2025 www.helantra7.com