Hyundai Elantra: Charging System / Alternator Schematic Diagrams

Hyundai Elantra AD (2016-2020) Service Manual / Engine Electrical System / Charging System / 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.(High voltage: 4V or higher, low voltage: 2V or lower)

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FR signal - The transistor activation signal inside the alternator monitors the voltage generated by the alternator to control the excitation current before it sends the FR signal to the ECM. (At certain RPM/electric loads, the FR duty can remain static. However, more often, the RPM, electric load, target voltage, etc. are always changing in the vehicle, so the FR must also change constantly)

•	L signal - Turns on the battery warning lamp on the dashboard when the battery charging system malfunctions. (Conditions for turning on the lamp - overcharge, over discharge, a field coil blown inside the alternator)

•	B+ terminal - The output voltage from the generator travels to the battery via the B+ terminal.

Alternator Components and Components Location

Components 1. OAD (Overrunning Alternator Decoupler) 2. Front Bracket3. Front Bearing4. Stator5. Rotor6. Rear Bearing7. Rear Bracket8. Brush Holder Assembly9. Through Bolt10. Rectifier Assembly11 ...

Alternator Repair procedures

Removal 1. Turn ignition switch OFF and disconnect the negative (-) battery cable. 2. Remove the drive belt. (Refer to Engine Mechanical System - "Drive Belt") 3. Disconnect the alter ...

Other information:

Hyundai Elantra AD (2016-2020) Service Manual: Camshaft Position Sensor (CMPS) Repair procedures
Inspection 1. Check the signal waveform of the CMPS and CKPS using the GDS. Specification : Refer to "Wave Form" Removal • DON’T remove the camshaft position sensor during engine running or right after engine stops, or a scald by the flowed out engine ...

Hyundai Elantra AD (2016-2020) Service Manual: Variable Intake Solenoid (VIS) Valve Repair procedures
Inspection 1. Turn the ignition switch OFF. 2. Disconnect the VIS valve connector. 3. Measure resistance between VIS valve terminals 1 and 2. Specification : Refer to "Specification" Removal 1. Turn the ignition switch OFF and disconnect the battery negative (-) cable. 2. ...