Mitsubishi Montero Sport (2004+). Manual — part 90

16-1

GROUP 16

ENGINE

ELECTRICAL

CONTENTS

CHARGING SYSTEM . . . . . . . .

16-3

GENERAL DESCRIPTION . . . . . .

16-3

CHARGING SYSTEM DIAGNOSIS

16-4

SPECIAL TOOL. . . . . . . . . . . . . . .

16-6

ON-VEHICLE SERVICE. . . . . . . . .

16-7

GENERATOR OUTPUT LINE VOLTAGE
DROP TEST . . . . . . . . . . . . . . . . . . . . .

16-7

OUTPUT CURRENT TEST . . . . . . . . . .

16-8

REGULATED VOLTAGE TEST. . . . . . .

16-10

WAVE PATTERN CHECK USING AN
OSCILLOSCOPE. . . . . . . . . . . . . . . . . .

16-11

GENERATOR ASSEMBLY . . . . . .

16-14

REMOVAL AND INSTALLATION . . . . .

16-14

DISASSEMBLY AND ASSEMBLY. . . . .

16-15

INSPECTION . . . . . . . . . . . . . . . . . . . . .

16-17

STARTING SYSTEM . . . . . . . .

16-20

GENERAL DESCRIPTION . . . . . . .

16-20

STARTING SYSTEM DIAGNOSIS .

16-21

ON-VEHICLE SERVICE . . . . . . . . .

16-22

STARTER RELAY CHECK . . . . . . . . . .

16-22

STARTER MOTOR ASSEMBLY . .

16-23

REMOVAL AND INSTALLATION. . . . . .

16-23

INSPECTION . . . . . . . . . . . . . . . . . . . . .

16-23

DISASSEMBLY AND ASSEMBLY . . . . .

16-26

INSPECTION . . . . . . . . . . . . . . . . . . . . .

16-28

Continued on next page

Battery posts, terminals and related accessories contain lead and lead compounds. WASH HANDS

AFTER HANDLING.

WARNING

16-2

IGNITION SYSTEM . . . . . . . . . . . . . .

16-30

GENERAL DESCRIPTION . . . . . .

16-30

SPECIAL TOOLS. . . . . . . . . . . . . .

16-31

ON-VEHICLE SERVICE. . . . . . . . .

16-31

SPARK PLUG CABLE TEST . . . . . . . . .

16-31

SPARK PLUG TEST . . . . . . . . . . . . . . .

16-31

IGNITION COIL CHECK . . . . . . . . . . . .

16-32

IGNITION POWER TRANSISTOR
CONTINUITY CHECK . . . . . . . . . . . . . .

16-32

SPARK PLUG CABLE RESISTANCE
CHECK . . . . . . . . . . . . . . . . . . . . . . . . .

16-33

SPARK PLUG CHECK AND CLEANING

16-33

CAMSHAFT POSITION SENSOR CHECK

16-33

CRANKSHAFT POSITION SENSOR
CHECK . . . . . . . . . . . . . . . . . . . . . . . . .

16-33

IGNITION SECONDARY VOLTAGE WAVE
PATTERN CHECK USING AN
OSCILLOSCOPE. . . . . . . . . . . . . . . . . .

16-34

IGNITION PRIMARY VOLTAGE WAVE
PATTERN CHECK USING AN
OSCILLOSCOPE . . . . . . . . . . . . . . . . . .

16-39

CAMSHAFT POSITION SENSOR
AND CRANKSHAFT POSITION
SENSOR . . . . . . . . . . . . . . . . . . . . .

16-44

REMOVAL AND INSTALLATION. . . . . .

16-44

SPECIFICATIONS . . . . . . . . . .

16-45

FASTENER TIGHTENING
SPECIFICATIONS . . . . . . . . . . . . .

16-45

GENERAL SPECIFICATIONS . . . .

16-45

SERVICE SPECIFICATIONS . . . . .

16-46

CHARGING SYSTEM

TSB Revision

ENGINE ELECTRICAL

16-3

CHARGING SYSTEM

GENERAL DESCRIPTION

M1161000100384

The charging system charges the battery with the
generator output to keep the battery charged at a
constant level during varying electrical load.

OPERATION

Rotation of the excited field coil generates AC volt-
age in the stator.
This alternating current is rectified through diodes to
DC voltage having a waveform shown in the illustra-
tion at left.
The average output voltage fluctuates slightly with
the generator load condition.

When the ignition switch is turned on, current flows in
the field coil and initial excitation of the field coil
occurs.
When the stator coil begins to generate power after
the engine is started, the field coil is excited by the
output current of the stator coil.
The generator output voltage rises as the field cur-
rent increases and it falls as the field current
decreases. When the battery positive voltage (gener-
ator S terminal voltage) reaches a regulated voltage
of approximately 14.4 V, the field current is cut off.
When the battery positive voltage drops below the
regulated voltage, the voltage regulator regulates the
output voltage to a constant level by controlling the
field current.
In addition, when the field current is constant, the
generator output voltage rises as the engine speed
increases.

AKX00183

VOLTAGE

TIME

APPROXIMATELY
14.4 V

AB

AK100143

GENERATOR

VOLTAGE
REGULATOR

FIELD COIL

STATOR
COIL

GENERATOR
MALFUNCTION LIGHT

IGNITION
SWITCH

BATTERY

B

L

S

+

-

AC

CHARGING SYSTEM

TSB Revision

ENGINE ELECTRICAL

16-4

CHARGING SYSTEM DIAGNOSIS

M1161000700278

TROUBLESHOOTING HINTS

Generator malfunction light dose not go on when the ignition

switch is turned to ON, before the engine starts.

• Check the bulb.

Generator malfunction light dose not switch off after the engine

starts.

• Check the IC voltage regulator inside the generator.

Discharged or overcharged battery.

• Check the IC voltage regulator inside the generator.

The generator malfunction light illuminates dimly.

• Check the diode (inside the combination meter) for a

short-circuit.

TROUBLESHOOTING GUIDE

The charging system troubleshooting guide is shown in the fol-
lowing steps.

STEP 1.
Q: Is the battery in good condition? (Refer to GROUP 54A,

Chassis Electrical

− Battery − On-vehicle Service −

Battery Check

P.54-5

.)

YES : Go to Step 2 .
NO : Charge or replace the battery.

STEP 2.
Q: Is the generator drive belt in good condition? (Refer to

GROUP 00, General <Body and Chasis>

− Maintenance

Service

− 8. Drive Belt (For Generator, Water Pump and

Power Steering Pump) (Check Condition)

P.00-46

.)

YES : Go to Step 3 .
NO : Adjust the belt tension or replace the belt.

STEP 3.
Q: Does the generator malfunction light come on when the

ignition switch is turned on?
YES : Go to Step 4 .
NO :

• Check the ignition switch. (Refer to GROUP 54A,

Chassis Electrical

− Ignition Switch − Ignition

Switch Removal and Installation

− Inspection

P.54-74

.)

• Check for burnt-out generator malfunction light.

• Check the generator. (Refer to Charging System −

Generator Assembly

− Inspection

P.16-17

.)

• Check the generator malfunction light-related

circuits.