Mitsubishi Eclipse. Manual - part 667

CHARGING SYSTEM

TSB Revision

ENGINE ELECTRICAL

16-11

14.If the voltage reading conforms to the value in the

voltage regulation table, then the voltage regulator
is operating normally.
If the voltage is outside the standard value, there
is a malfunction of the voltage regulator or the
generator (Refer to the following table).

15.After the test, lower the engine speed to the idle

speed.

16.Turn the ignition switch to the "LOCK" (OFF)

position.

17.Disconnect the negative battery cable.
18.Disconnect the ammeter, voltmeter and engine

tachometer.

19.Connect the generator output wire to the

generator "B" terminal.

20.Connect the negative battery cable.

VOLTAGE REGULATION TABLE

WAVE PATTERN CHECK USING AN
OSCILLOSCOPE

M1161001200135

MEASUREMENT METHOD
Connect the oscilloscope special patterns pick-up to the gener-
ator "B" terminal.

STANDARD WAVEFORM

INSPECTION TERMINAL

VOLTAGE REGULATOR AMBIENT
TEMPERATURE [

°C (°F)]

STANDARD VALUE (V)

Terminal "S"

−20 (−4)

14.2

− 15.4

20 (68)

13.9

− 14.9

60 (140)

13.4

− 14.5

80 (176)

13.1

− 14.5

AKX00188

GENERATOR

OSCILLOSCOPE

"B" TERMINAL

PROBE

Observation Conditions

FUNCTION

SPECIAL PATTERNS

Pattern height

Variable

Variable knob

Adjust while viewing the wave
pattern

Pattern selector

Raster

Engine revolutions

Curb idle speed

CHARGING SYSTEM

TSB Revision

ENGINE ELECTRICAL

16-12

NOTE: The voltage waveform of the generator "B" terminal can
undulate as shown at left. This waveform is produced when the
regulator operates according to fluctuations in the generator
load (current), and is normal for the generator.
If the ripple height is abnormally high (approximately 2 V or
more during idling), the wires between the generator "B" termi-
nal and the battery have broken due to fuse blowing, etc. The
generator is usually operating properly.

ABNORMAL WAVEFORMS EXAMPLES
NOTE: The size of the waveform patterns can differ greatly,
depending on the adjustment of the variable knob on the oscil-
loscope.
NOTE: Identification of abnormal waveforms is easier when
there is a large output current (regulator is not operating).
(Waveforms can be observed when the headlights are illumi-
nated.)
NOTE: Check the conditions of the charging indicator light (illu-
minated/not illuminated) also, and carry out a total check.

ABNORMAL WAVEFORMS

• Example 1

PROBABLE CAUSE: Open circuit in diode

AKX00189

0.4

(V)

0.2

–0.2

–0.4

VOLTAGE AT
GENERATOR
"B" TERMINAL

TIME

AKX00190

AKX00191

CHARGING SYSTEM

TSB Revision

ENGINE ELECTRICAL

16-13

• Example 2

PROBABLE CAUSE: Short-circuit in diode

• Example 3

PROBABLE CAUSE: Open circuit in stator coil

• Example 4

PROBABLE CAUSE: Short-circuit in stator coil

• Example 5

PROBABLE CAUSE: Open circuit in supplementary diode

AKX00192

AKX00193

AKX00194

AKX00195

CHARGING SYSTEM

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ENGINE ELECTRICAL

16-14

GENERATOR ASSEMBLY

REMOVAL AND INSTALLATION

M1161001400214

Pre-removal Operation
• Under Cover Removal

• Engine Mount Bracket Removal (Refer to GROUP 32,

Engine Mount

P.32-4

Post-installation Operation
• Engine Mount Bracket Installation (Refer to GROUP 32

P.32-4

• Drive Belt Tension Adjustment (Refer to GROUP 00,

Maintenance Service

− Drive Belts

P.00-46

• Under Cover Installation

AC000285

12 ± 2 N·m
100 ± 22 in-lb

4.9 ± 1.0 N·m
44 ± 8 in-lb

23 ± 2 N·m
16 ± 2 ft-lb

44 ± 10 N·m
33 ± 7 ft-lb

49 ± 10 N·m
36 ± 7 ft-lb

21 ± 4 N·m
16 ± 3 ft-lb

44 ± 10 N·m
33 ± 7 ft-lb

14 ± 1 N·m
117 ± 13 in-lb

<2.4L ENGINE>

<3.0L ENGINE>

REMOVAL STEPS

OIL PRESSURE HOSE AND
TUBE ASSEMBLY CLAMP
BOLTS <2.4L ENGINE>

OIL RETURN TUBE ASSEMBLY
CLAMP BOLT <2.4L ENGINE>

<<A>>

DRIVE BELT (POWER
STEERING, A/C) <2.4L ENGINE>

DRIVE BELT (GENERATOR)

OIL LEVEL GAUGE UNIT <3.0L
ENGINE>

WATER PUMP PULLEY <2.4L
ENGINE>

GENERATOR CONNECTOR

GENERATOR BRACE <2.4L
ENGINE>

REMOVAL STEPS (Continued)

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