Hyundai Elantra: Description and Operation - Charging System - Engine Electrical System - Hyundai Elantra HD 2006–2010 Service ManualHyundai Elantra: Description and Operation


The charging system includes a battery, an alternator with a built-in regulator, and the charging indicator light and wire.
The alternator has six built-in diodes (three positive and three negtive), each rectifying AC current to DC current.
Therefore, DC curent appears at alternator "B" terminal.
In addition, the charging voltage of the alternator is regulated by the battery voltage detection system. The main components of the alternator are the rotor(A), stator(B), rectifier(C), brushes(D), bearings(E) V-ribbed belt pulley(F). The brush holder contains a built-in electronic voltage regulator(G).

Alternator Management System
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.

    Repair procedures
    Inspection Voltage Drop Test This test determines if the wiring between the alternator"B" terminal and the battery (+) terminal is good by thevoltage drop method. Preparation ...