Hyundai Sonata LF: Charging System / Alternator Repair procedures

Hyundai Sonata LF 2014-2019 Service Manual / Engine Electrical System / Charging System / Alternator Repair procedures

Removal

1.	Disconnect the battery negative terminal.

2.	Loosen the mounting bolts (A) and then, turn the adjusting bolt (B) clockwise to loosen tension.

3.	Remove the drive belt (A).

4.	Disconnect the air compressor connector (A) and the alternator connector (B), and remove the cable from alternator "B" terminal (C).

5.	Remove the alternator (A).

Installation

1.	Install in the reverse order of removal.

Adjust the alternator belt tension after installation.

(Refer to Engine Mechanical System - "Drive Belt")

Alternator installation bolt:

[12mm (0.47in) bolt]

19.6 ~ 26.5 Nm (2.0 ~ 2.7 kgf.m, 14.5 ~ 19.5 Ib-ft)

[14mm (0.55in) bolt]

29.4 ~ 41.2 Nm (3.0 ~ 4.2 kgf.m, 21.7 ~ 30.4 Ib-ft)

Disassembly

1.	Remove the rear cover (A) after removing nuts.

2.	Remove the mounting bolts (A) and the brush holder assembly (B).

3.	Remove the slip ring guide (A) after pulling it.

Remove the OAD(Overrunning Alternator Decoupler) cap.

•	When installing, replace with new OAD cap.

5.	Remove the OAD(Overrunning Alternator Decoupler) pulley (A) using the special tool.

6.	Unsolder the 3 stator leads (A).

7.	Remove the 4 through bolts (A).

8.	Disconnect the rotor (A) and bracket (B).

Reassembly

Reassemble in the reverse order of disassembly.

•	When reassembling OAD pulley, replace with new OAD cap.

Inspection

[Rotor]

1.	Check that there is continuity between the slip rings (C).

2.	Check that there is no continuity between the slip rings and the rotor (B) or rotor shaft (A).

3.	If the rotor fails either continuity check, replace the alternator.

[Stator]

1.	Check that there is continuity between each pair of leads (A).

2.	Check that there is no continuity between each lead and the coil core.

3.	If the coil fails either continuity check, replace the alternator.

Alternator Schematic Diagrams

Circuit Diagram • COM signal - When controlling the voltage generated, the ECM sends the target voltage data to the alternator via a PWM signal...

Battery Description and Operation

Description [AGM Battery] AGM battery is used for especially heavy load on the vehicle network depending on equipment and requirements. AGM stands for Absorbent Glass Material Battery; that is absorbent glass fibre fleece...

Other information:

Hyundai Sonata LF 2014-2019 Service Manual: Troubleshooting

Troubleshooting SymptomSuspect AreaRemedy (Refer to page)Water leaks from panorama sunroofDirt accumulated in drain tubeClear dirt inside of drainClogged drain tubeBlow air into drain to remove dirtBroken or dislocated drain tube, defective or cracked clipCheck tube installation and flange contactDeteriorated roof lid weatherstripReplaceExcessive roof lid-to-body clearance and improperly fitted weatherstripAdjustWind noise around panorama sunroofLoosen or deformed deflector, gaps in body workRetighten adjust or replaceMisaligned weather stripReadjust or replace weather stripSunroof lid makes a noise when moveForeign particles lodged in guide railCheck drive cable and guide rails for foreign particlesLoosen guide rails and lidRetightenMotor runs but panorama sunroof does not move or moves only partiallyForeign particles lodged in guide railAdjust or replaceIncorrect engagement of motor pinion with drive cableDecrease in motor`s clutch slipping forceIncreased sunroof sliding resistance or interference of sunroof with drive cables, weatherstrip, etc...

Hyundai Sonata LF 2014-2019 Service Manual: Intake Air Temperature Sensor (IATS) Description and Operation