Mitsubishi Eclipse / Eclipse Spyder (2000-2002). Service and repair manual — part 356

16-1

GROUP 16

ENGINE

ELECTRICAL

CONTENTS

CHARGING SYSTEM . . . . . . . .

16-3

GENERAL DESCRIPTION . . . . . .

16-3

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

16-4

CHARGING SYSTEM DIAGNOSIS

16-4

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

16-6

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

16-6

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. . . . .

16-16

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

16-18

STARTING SYSTEM . . . . . . . . .

16-21

GENERAL DESCRIPTION . . . . . .

16-21

STARTING SYSTEM DIAGNOSIS

16-22

STARTER MOTOR ASSEMBLY . .

16-24

REMOVAL AND INSTALLATION . . . . .

16-24

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

16-25

DISASSEMBLY AND ASSEMBLY. . . . .

16-28

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

16-30

IGNITION SYSTEM . . . . . . . . .

16-32

GENERAL DESCRIPTION . . . . . . .

16-32

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

16-33

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

16-34

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

16-34

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

16-34

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

16-35

IGNITION FAILURE SENSOR CHECK .

16-36

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

16-36

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

16-36

SPARK PLUG CHECK AND CLEANING

16-37

CAMSHAFT POSITION SENSOR CHECK

16-37

CRANK ANGLE SENSOR CHECK . . . .

16-37

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

16-38

IGNITION PRIMARY VOLTAGE WAVE
PATTERN CHECK . . . . . . . . . . . . . . . . .

16-45

IGNITION COIL. . . . . . . . . . . . . . . .

16-49

REMOVAL AND INSTALLATION
<2.4L ENGINE> . . . . . . . . . . . . . . . . . . .

16-49

DISTRIBUTOR ASSEMBLY. . . . . .

16-50

REMOVAL AND INSTALLATION
<3.0L ENGINE> . . . . . . . . . . . . . . . . . . .

16-50

DISASSEMBLY AND ASSEMBLY . . . . .

16-51

16-2

CAMSHAFT POSITION SENSOR .

16-51

REMOVAL AND INSTALLATION
<2.4L ENGINE> . . . . . . . . . . . . . . . . . . .

16-51

CRANKSHAFT POSITION SENSOR

16-52

REMOVAL AND INSTALLATION
<2.4L ENGINE> . . . . . . . . . . . . . . . . . . .

16-52

REMOVAL AND INSTALLATION
<3.0L ENGINE> . . . . . . . . . . . . . . . . . . .

16-53

KNOCK SENSOR . . . . . . . . . . . . .

16-54

REMOVAL AND INSTALLATION
<2.4L ENGINE> . . . . . . . . . . . . . . . . . . .

16-54

REMOVAL AND INSTALLATION
<3.0L ENGINE> . . . . . . . . . . . . . . . . . . .

16-55

SPECIFICATIONS . . . . . . . . . .

16-56

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

16-56

GENERAL SPECIFICATIONS . . . .

16-57

SERVICE SPECIFICATIONS . . . . .

16-57

CHARGING SYSTEM

TSB Revision

ENGINE ELECTRICAL

16-3

.

C H A R G IN G SYSTEM

GENERAL DESCRIPTION

M1161000100072

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
voltage in the stator.
This alternating current is rectified through diodes to
DC voltage having a waveform shown in the
illustration 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
current increases and it falls as the field current
decreases. When the battery positive voltage
(generator S terminal voltage) reaches a regulated
voltage of approximately 14.4V, 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
14.4V

AB

AK000621

GENERATOR

GENERATOR

<2.4L ENGINE>

<3.0L ENGINE>

B

B

STATOR
COIL

STATOR
COIL

ECM<M/T>
PCM<A/T>

ECM<M/T>
PCM<A/T>

G

S

L

FR

G

S

L

FR

VOLTAGE REGULATOR

VOLTAGE REGULATOR

CHARGING
WARNING
LIGHT

CHARGING
WARNING
LIGHT

IGNITION
SWITCH

IGNITION
SWITCH

BATTERY

FIELD COIL

FIELD COIL

−

BATTERY

−

AC

+

+

CHARGING SYSTEM

TSB Revision

ENGINE ELECTRICAL

16-4

SPECIAL TOOLS

M1161000600055

CHARGING SYSTEM DIAGNOSIS

M1161000700063

TROUBLESHOOTING HINTS

1. Charging warning light does not go on when the ignition

switch is turned to ON, before the engine starts.

•

Check the bulb.

2. Charging warning light does not switch off after the engine

starts.

•

Check the IC voltage regulator inside the generator.

3. Discharged or overcharged battery.

•

Check the IC voltage regulator inside the generator.

4. The charging warning 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
following chart.

STEP 1.

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

Battery

−

On-vehicle Service - Battery Check

P.54A-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, Maintenance Service - Drive Belts

P.00-40

.)

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

TOOL

TOOL NUMBER AND
NAME

SUPERSESSION

APPLICATION

MB991502
Scan tool (MUT-II)

MB991496-OD

Checking of engine idle
speed

MB991519
Generator harness
connector

Tool not available

Checking of generator (S
terminal voltage)

B991502