- Description

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.

1. Brush
2. OAD (Overrunning Alternator Decoupler)
3. Rotor
4. Stator

- 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)

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.

Item	Variant	Part #	Price
Alternator · Alternator	Korea Built	373002E821	$675.18
Alternator · Alternator	Us Built	373002E721	$719.42

Operation	Task	Skill	Hours
Remove & Install	Alternator · Alternator, R&I	B	0.8
Remove & Replace	Alternator · Alternator, R&R	B	0.8