Mitsubishi Pajero Pinin. Manual - part 152

ENGINE ELECTRICAL –  

Charging System

ENGINE ELECTRICAL –  

Charging System

16-2

CHARGING SYSTEM

GENERAL

OUTLINE OF CHANGES

The following contents have been established to correspond to the addition of vehicles with 4G9-MPI
engine. Other specifications are the same as for the 4G9-GDI engine.

GENERAL INFORMATION

ALTERNATOR SPECIFICATIONS

Items

4G9-MPI

Type

Battery voltage sensing

Rated output V/A

12/85

Voltage regulator

Electronic built-in type

ALTERNATOR

REMOVAL AND INSTALLATION

Pre-removal Operation
Under Cover Removal

Post-installation Operation

D

Drive Belt Tension Adjustment

D

Under Cover Installation

3

23 

±

 2 N·m

5

1

2

4

<4G9– MPI>

44 

±

 10 N·m

44 

±

 10 N·m

Disassembly steps

1. Drive belt (Power steering, A/C)
2. Drive belt (Alternator)
3. Alternator brace

4. Alternator connector
5. Alternator

ENGINE ELECTRICAL –  

Charging System

16-3

DISASSEMBLY AND REASSEMBLY

1

2

7

6

5

3

4

14

13

12

11

10

9

8

Disassembly steps

A

A

"

1. Front bracket assembly

A

B

"

2. Alternator pulley

"

B

A

3. Rotor
4. Rear bearing
5. Bearing retainer
6. Front bearing
7. Front bracket

A

C

"

8. Stator
9. Plate

A

C

" "

A

A

10. Regulator assembly

11. Brush

12. Slinger
13. Rectifier
14. Rear bracket

ENGINE ELECTRICAL –  

Charging System

16-4

DISASSEMBLY SERVICE POINTS

A

A

"

FRONT BRACKET ASSEMBLY REMOVAL

Insert a flat tip screwdriver, etc., in the clearance between
the front bracket assembly and stator core, to pry open and
separate the stator and front bracket.

Caution
The stator coil could be damaged so do not insert the
screwdriver too far.

A

B

"

ALTERNATOR PULLEY REMOVAL

Face the pulley side upward, fix the rotor with a work bench
and remove the pulley.

Caution
Use care so that the rotor is not damaged.

A

C

"

STATOR/REGULATOR ASSEMBLY REMOVAL

1.

Use a soldering iron (180 to 250 W) to unsolder the stator.
This work should complete within approximately four
seconds to prevent heat from transferring to the diode.

2.

When removing the rectifier from the regulator assembly,
remove the soldered sections of the rectifier.

Caution
(1) Use care to make sure that the heat of the soldering

iron is not transmitted to the diodes for a long
period.

(2) Use care that no undue force is exerted to the

lead wires of the diodes.

Soldered

ENGINE ELECTRICAL –  

Charging System

16-5

REASSEMBLY SERVICE POINTS

"

A

A

REGULATOR ASSEMBLY INSTALLATION

After installing the regulator assembly, insert a wire into the
hole provided on the rear bracket while pressing in the brush
to fix the brush.

NOTE
The brush is fixed when a wire is inserted, making rotor
installation easier.

"

B

A

ROTOR INSTALLATION

After installing the rotor, remove the wire used to fix the brush.

INSPECTION

ROTOR CHECK

1.

Check the continuity between the rotor coil slip rings, and
replace the rotor if the resistance value is not at the
standard value.

Standard value: 3 –  5 

Ω

2.

Check the continuity between the slip ring and core, and
if there is continuity, replace the rotor.

Wire

Rear bracket

Brush

Wire

Wire