Hyundai Sonata LF: Engine Electrical System / Ignition System

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...

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)...

Other information:

Hyundai Sonata LF 2014-2019 Service Manual: Description and Operation

Description EPS (Electric power steering) system uses an electric motor to assist the steering force and it is an engine operation independent steering system. EPS control module controls the motor operation according to information received from the each sensor and CAN (Controller Area Network), resulting in a more precise and timely control of steering assist than conventional engine-driven hydraulic systems...

Hyundai Sonata LF 2014-2019 Service Manual: Ambient Temperature Sensor (ATS) Description and Operation

Description Ambient Temperature Sensor (ATS) is installed on the front-end module and senses the ambient temperature. ECM receives not only the intake air temperatue but also the ambient air temperature informations at the same time to control the intake air quantity precisely provided through the turbo charger...