Hyundai Elantra (CN7): Charging System / Description and operation

Hyundai Elantra (CN7) 2021-2026 Service Manual / Engine Electrical System / Charging System / Description and operation

Description
The charging system included a battery, an alternator with a built-in regulator, and the charging indicator light and wire.
The Alternator has eight built-in diodes, each rectifying AC current to DC current.
Therefore, DC current appears at alternator "B" terminal.
In addition, the charging voltage of this alternator is regulated by the battery voltage detection system.
The alternator is regulated by the battery voltage detection system. The main components of the alternator are the rotor, stator, rectifier, capacitor brushes, bearings and V-ribbed belt pulley. The brush holder contains a built-in electronic voltage regulator.
Alternator Management System (AMS)
Alternator management system controls the charging voltage set point in order to improve fuel economy, manage alternator load under various operating conditions, keep the battery charged, and protect the battery from over-charging. ECM controls generating voltage by duty cycle (charging control, discharging control, normal control) based on the battery conditions and vehicle operating conditions.
The system conducts discharging control when accelerating a vehicle. Vehicle reduces an alternator load and consumes an electric power form a battery.
The system conducts charging control when decelerating a vehicle. Vehicle increases an alternator load and charges a battery.

    Troubleshooting Symptom Suspect area Remedy Charging warning indicator does not light with ignition switch "ON" and engine off.

    Other information:

    Hyundai Elantra (CN7) 2021-2026 Service Manual: Mood Lamp

    Repair procedures RemovalMood lamp unit1.Disconnect the negative (-) battery terminal.2.Remove the main crash pad assembly.(Refer to Body - "Main Crash Pad Assembly")3.Loosen the mounting screws and remove the main crash pad air duct (A).4.Loosen the mounting screws and remove the mood lamp unit (A).

    Hyundai Elantra (CN7) 2021-2026 Service Manual: Repair procedures

    Diagnosis with Diagnostic tool1.In the body electrical system, failure can be quickly diagnosed by using the vehicle diagnostic system (Diagnostic tool).The diagnostic system (Diagnostic tool) provides the following information.(1)Fault Code Searching : Checking failure and code number (DTC)(2)Data Analysis : Checking the system input/output data s

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