Hyundai Sonata: 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 12 V supply.
Repair procedures
On-vehicle Inspection Inspect ignition coil assembly and Perform spark test 1. Check for DTCs.     • If a DTC is present, perform troubleshooting in accordance with the ...

Ignition Coil Specifications
Specification ItemSpecification Primary Coil Resistance (?)0.56 ± 10% [20°C (68°F)]Secondary Coil Resistance (k?)2.0 ± 15% [20°C (68°F)] ...

Other information:

Hyundai Sonata LF 2014-2019 Service Manual: Repair procedures
Fuel Pressure Test (Low pressure system) 1. Release the residual pressure in fuel line. (Refer to the Fuel Delivery System - Repair Procedures - "Release Residual Pressure in Fuel Line").     When removing the fuel pump fuse, a Diagnostic Trouble Code (DTC) may occur. Dele ...

Hyundai Sonata LF 2014-2019 Service Manual: Engine Oil Repair procedures
Replacement     • Prolonged and repeated contact with mineral oil will result in the removal of natural fats from the skin, leading to dryness, irritation and dermatitis. In addition, used engine oil contains potentially harmful contaminants which may cause skin cance ...

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