Kia Rio: Charging System / Alternator

Kia Rio 2017-2023 YB Service Manual / Engine Electrical System / Charging System / Alternator

Specifications

Specification

▷ 13.5V, 90A

Item	Specification
Rated voltage	13.5V, 90A
Speed in use	1,000 - 18,000 rpm
Voltage regulator	IC Regulator built-in type
Regulator Setting Voltage (Internal mode)	14.55 ± 0.3V
Connector	3 Pin (C, FR, L)

▷ 13.5V, 130A

Item	Specification
Rated voltage	13.5V, 130A
Speed in use	1,000 - 18,000 rpm
Voltage regulator	IC Regulator built-in type
Regulator Setting Voltage (Internal mode)	14.55 ± 0.3V
Connector	3 Pin (C, FR, L)
Pully Type	OAP

Components and components location

Components

1. OAP (Overrunning Alternator Pully)
2. Front Bracket
3. Front Bearing
4. Stator
5. Rotor
6. Rear Bearing

7. Rear Bracket
8. Brush Holder Assembly
9. Through Bolt
10. Rectifier Assembly
11. Rear Cover

Description and operation

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. Over-running Alternator (OAP) Pulley
3. Rotor
4. Stator
5. Rectifier

Schematic diagrams

Circuit Diagram

[130A Type]

[90A Type]

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

•

FR signal - The transistor activation signal inside thealternator monitors the voltage generated by thealternator to control the field current before itsends 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.

Repair procedures

Removal

1.	Disconnect the battery negative (-) terminal.

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

3.	Remove the drive belt (A).

Remove the alternator lower bolt and upper bolt (A).

Alternator upper mounting bolt:

19.6 - 26.5 N·m (2.0 - 2.7 kgf·m, 14.5 - 19.5 Ib·ft)

Alternator lower mounting bolt:

29.4 - 41.2 N·m (3.0 - 4.2 kgf·m, 21.7 - 30.4 Ib·ft)

5.	Remove the alternator (A).

Installation

1.	Install in the reverse order of removal.

2.	Adjust the alternator belt tension after installation. (Refer to Engine Mechanical System - "Drive Belt")

3.	Install the alternator.

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 (A).

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

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.

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