Kia Cadenza YG: Ignition System / Ignition Coil Description and Operation

Kia Cadenza YG 2016-2021 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 12 V supply.

    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 procedure for that DTC.

    Specification ItemSpecification Primary Coil Resistance (Ω)0.62 ± 10％ [20°C (68°F)]Secondary Coil Resistance (kΩ)7.0 ± 15％ [20°C (68°F)]

    Other information:

    Kia Cadenza YG 2016-2021 Service Manual: Immobilizer Control Unit Repair procedures

    Removal 1. Disconnect the negative (-) battery terminal. 2. Remove the crash pad lower panel. (Refer to Body - "Crash Pad") 3. Disconnect the 5P connector of the SMARTRA unit and then remove the SMARTRA unit (A) after loosening the bolt. Installation 1.

    Kia Cadenza YG 2016-2021 Service Manual: Photo Sensor Repair procedures

    Inspection 1. Ignition "ON" 2. Using the scan tool. 3. Emit intensive light toward photo sensor using a lamp, and check the output voltage change. 4. The voltage will rise with higher intensive light and reduce with lower intensive light.

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