Kia Picanto: Charging System / Alternator

Kia Picanto JA 2017-2022 Service & Repair Manual / Engine Electrical System / Charging System / Alternator

Specifications
Specification
▷ 13.5V, 120A [ISG only]
Item
Specification
Rated voltage
13.5V, 120A
Speed in use
1,000 - 18,000 rpm
Voltage regulator
IC Regulator built-in type
ECM Interface type regulator
LIN communication
Regulator Setting Voltage (Internal mode)
14.5 ± 0.3V
Connector
1 Pin (COM)
Pulley Type
OAP

▷ 13.5V, 90A [NON-ISG]
Item
Specification
Rated voltage
13.5V, 90A
Speed in use
1,000 - 18,000 rpm
Voltage regulator
IC Regulator built-in type
ECM Interface type regulator
LIN communication
Regulator Setting Voltage (Internal mode)
14.5 ± 0.3V
Connector
1 Pin (COM)
Pulley Type
OAP

   
OAP : Overruning Alternator Pulley
Components and components location
Component

1. 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 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. OAP : Overruning Alternator Pulley
3. Rotor
4. Stator
5. Rectifier

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)
B+ terminal - The output voltage from the generator travels to the battery via the B+ terminal.
Repair procedures
Removal
1.
Turn ignition switch OFF and disconnect the negative (-) battery terminal.
2.
Remove the air cleaner.
(Refer to Engine Mechanical System - "Air Cleaner")
3.
Disconnect the alternator connector (A) and alternator "B" cable (B) from the terminal.
Tightening torque :
13.7 - 17.7 N·m (1.4 - 1.8 kgf·m, 10.1 - 13.0 Ib·ft)

4.
Remove the drive belt.
(Refer to Engine Mechanical System - "Drive Belt")
5.
Remove the intake manifold.
(Refer to Engine Mechanical System - "Intake Manifold")
6.
Remove the alternator mounting bolts (A).
Tightening torque :
Alternator upper mounting bolt :
29.4 - 41.2 N·m (3.0 - 4.2 kgf·m, 21.7 - 30.4 Ib·ft)
Alternator lower mounting bolt :
21.6 - 32.4 N·m (2.2 - 3.3 kgf·m, 15.9 - 23.8 Ib·ft)

7.
Remove the alternator (A).

Installation
1.
Install in the reverse order of removal.
Disassembly
1.
Remove the rear cover (A).

2.
Remove the regulator assembly (A) after loosening the mounting bolts.
   
When removing, be careful not to damage other parts.

3.
Remove the OAP cap (A).

   
When installing, replace with new OAP cap.
4.
Using the SST (09373-27000), remove the OAP pulley (A).

5.
Remove the rectifier assembly (A) after disconnecting the stator leads.

6.
Loosen the through bolts (A).

7.
Disconnect the rotor (A) and housing (B).

Reassembly
1.
Reassemble in the reverse order of disassembly.
   
When reassembling OAP pulley, replace with new OAP cap.
Inspection
[Rotor]
1.
Check for continuity between the slip rings (C).

2.
Check that there is no continuity between the slip rings and the rotor (B) or rotor shaft (A).
3.
If the rotor fails either continuity checks, 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 checks, replace the alternator.
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