Hyundai Sonata LF: Ignition System / Repair procedures

Hyundai Sonata LF 2014-2019 Service Manual / Engine Electrical System / Ignition System / 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 procedure for that DTC. (Refer to DTC guide)
2.
Check if sparks occur.
(1)
Remove the engine cover.
(2)
Remove the ignition coils.
(3)
Using a spark plug wrench, remove the spark plugs.
(4)
Disconnect the injector extension connectors.
(5)
Ground the spark plug to the engine.

(6)
Check if sparks occur at each spark plug while engine is being cranked.
   
•
Do not crank the engine for more then 5 seonds.
3.
If sparks do not occur, perform the following test.

4.
Using a spark plug wrench, install spark plugs.
5.
Install the ignition coils.
6.
Install the engine cover.

    Description and Operation

    Description Ignition timing is controlled by the electronic control ignition timing system. The standard reference ignition timing data for the engine operating conditions are pre-pro grammed in the memory of the ECM (Engine Control Module)...

    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...

    Other information:

    Hyundai Sonata LF 2014-2019 Service Manual: Windshield Deicer


    Components and Components Location Component Location Windshield deicer system prevent windshield wiper from freezing in the winter season. It consists of deicer in the lower part of windshield, switch and relay. Body control module receives an input signal from the front defroster switch, then controls relay...

    Hyundai Sonata LF 2014-2019 Service Manual: Troubleshooting


    Troubleshooting Ignition System SymptomSuspect AreaRemedyEngine will not start or is hard to start (Cranks OK)Ignition lock switchInspect ignition lock switch, or replace as requiredIgnition coilInspect ignition coil, or replace as requiredSpark plugsInspect spark plugs, or replace as requiredIgnition wiring disconnected or brokenRepair wiring, or replace as requiredRough idle or stallsIgnition wiringRepair wiring, or replace as requiredIgnition coilInspect ignition coil, or replace as requiredEngine hesitates/poor accelerationSpark plugs and spark plug cablesInspect spark plugs / cable, or replace as requiredIgnition wiringRepair wiring, or replace as requiredPoor mileageSpark plugs and spark plug cablesInspect spark plugs / cable, or replace as required Charging System SymptomSuspect AreaRemedyCharging warning indicator does not light with ignition switch "ON" and engine off...

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