Mitsubishi Pajero Pinin. Manual - part 145

ENGINE ELECTRICAL – 

Charging System

16-10

EXAMPLES OF ABNORMAL WAVEFORMS

NOTE
1.

The size of the waveform patterns differs largely, depending on the adjustment of the variable knob
on the analyzer.

2.

Identification of abnormal waveforms is easier when there is a large output current (regulator is not
operating). (Waveforms can be observed when the headlamps are illuminated.)

3.

Check the conditions of the charging warning lamp (illuminated/not illuminated). Also, check the charging
system totally.

Abnormal waveforms

Problem
cause

Abnormal waveforms

Problem cause

Example 1

Open diode

Example 4

Short in stator
coil

Example 2

Short in diode

Example 5

Open
supplementary
diode

Example 3

Broken wire
in stator coil

At this time, the charging warning lamp
is illuminated.

ALTERNATOR RELAY CONTINUITY CHECK

1.

Remove the alternator relay from the relay box inside
the instrument panel.

2.

Set the analogue-type circuit tester to the 

Ω

 range and

check that there is continuity when the (+) terminal of
the tester is connected to terminal 2 of the alternator relay
and the (–) terminal is connected to terminal 4.

3.

Next, check that there is no continuity when the (+) terminal
is connected to terminal 4 and the (–) terminal is connected
to terminal 2.

4.

If the continuity checks in steps 2 and 3 show a defect,
replace the alternator relay.

1

2

3

4

Alternator
relay

ENGINE ELECTRICAL – 

Charging System

16-11

ALTERNATOR

REMOVAL AND INSTALLATION

Pre-removal Operation
Under Cover Removal

Post-installation Operation

D

Drive Belt Tension Adjustment

D

Under Cover Installation

3

20 – 25 Nm

5

1

2

4

44 Nm

44 Nm

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

16-12

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

16-13

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