Hyundai Sonata LF: Charging System / Battery Troubleshooting

Battery Repair procedures

Removal 1. Remove the air duct. (Refer to Engine Mechanical System - "Air Cleaner") 2. Disconnect the battery (-)terminal (A) and then (+)terminal (B)...

Battery Sensor Description and Operation

Description Vehicles have many control units that use more electricity. These units control their own system based on information from diverse sensors...

Other information:

Hyundai Sonata LF 2014-2019 Service Manual: Power Mosfet Repair procedures

Inspection 1. Turn the ignition switch ON. 2. Manually operate the control switch and measure the voltage of the blower motor. 3. Select the control switch to raise the voltage until high speed. Specification Fan Speed (Manual)Motor Voltage (V)14...

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...