Mitsubishi Lancer. Manual — part 202
NOTES
16-1
GROUP 16
CONTENTS
CHARGING SYSTEM . . . . . . . .
GENERAL INFORMATION . . . . . .
SERVICE SPECIFICATIONS. . . . .
SPECIAL TOOL . . . . . . . . . . . . . . .
ON-VEHICLE SERVICE. . . . . . . . .
ALTERNATOR OUTPUT LINE VOLTAGE
DROP TEST . . . . . . . . . . . . . . . . . . . . .
OUTPUT CURRENT TEST . . . . . . . . . .
REGULATED VOLTAGE TEST. . . . . . .
WAVEFORM CHECK USING AN
OSCILLOSCOPE. . . . . . . . . . . . . . . . . .
ALTERNATOR ASSEMBLY . . . . .
REMOVAL AND INSTALLATION
<4G1> . . . . . . . . . . . . . . . . . . . . . . . . . .
REMOVAL AND INSTALLATION
<4G6> . . . . . . . . . . . . . . . . . . . . . . . . . .
DISASSEMBLY AND REASSEMBLY . .
INSPECTION . . . . . . . . . . . . . . . . . . . . .
STARTING SYSTEM . . . . . . . . .
GENERAL INFORMATION . . . . . .
SERVICE SPECIFICATIONS. . . . .
STARTER MOTOR ASSEMBLY . .
REMOVAL AND INSTALLATION
<4G1> . . . . . . . . . . . . . . . . . . . . . . . . . .
REMOVAL AND INSTALLATION
<4G6> . . . . . . . . . . . . . . . . . . . . . . . . . .
STARTER MOTOR ASSEMBLY
INSPECTION . . . . . . . . . . . . . . . . . . . . .
DISASSEMBLY AND REASSEMBLY . .
INSPECTION . . . . . . . . . . . . . . . . . . . . .
IGNITION SYSTEM . . . . . . . . .
GENERAL INFORMATION . . . . . .
SERVICE SPECIFICATIONS . . . . .
SPECIAL TOOL . . . . . . . . . . . . . . .
ON-VEHICLE SERVICE . . . . . . . . .
IGNITION COIL (WITH BUILT-IN
POWER TRANSISTOR) CHECK . . . . . .
RESISTIVE CORD CHECK . . . . . . . . . .
SPARK PLUG CHECK AND CLEANING
<4G1>. . . . . . . . . . . . . . . . . . . . . . . . . . .
SPARK PLUG CHECK AND CLEANING
<4G6>. . . . . . . . . . . . . . . . . . . . . . . . . . .
CAMSHAFT POSITION SENSOR
CHECK . . . . . . . . . . . . . . . . . . . . . . . . . .
CRANK ANGLE SENSOR CHECK . . . .
DETONATION SENSOR CHECK . . . . .
IGNITION SECONDARY VOLTAGE
WAVEFORM CHECK USING AN
OSCILLOSCOPE . . . . . . . . . . . . . . . . . .
IGNITION COIL RELAY CHECK . . . . . .
IGNITION COIL. . . . . . . . . . . . . . . .
REMOVAL AND INSTALLATION
<4G1>. . . . . . . . . . . . . . . . . . . . . . . . . . .
REMOVAL AND INSTALLATION
<4G6>. . . . . . . . . . . . . . . . . . . . . . . . . . .
CAMSHAFT POSITION SENSOR .
REMOVAL AND INSTALLATION. . . . . .
CRANKSHAFT POSITION SENSOR
REMOVAL AND INSTALLATION
<4G1>. . . . . . . . . . . . . . . . . . . . . . . . . . .
REMOVAL AND INSTALLATION
<4G6>. . . . . . . . . . . . . . . . . . . . . . . . . . .
DETONATION SENSOR . . . . . . . .
REMOVAL AND INSTALLATION. . . . . .
CHARGING SYSTEM
ENGINE ELECTRICAL
16-2
CHARGING SYSTEM
GENERAL INFORMATION
M1161000100522
The charging system uses the alternator output to
keep the battery charged at a constant level under
various electrical loads.
OPERATION
AKX00183
Voltage
Time
Approximately
14.4 V
AC
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.
The average output voltage fluctuates slightly with
the alternator 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 alternator output voltage rises as the field cur-
rent increases and it falls as the field current
decreases. When the battery voltage (alternator "S"
terminal voltage) reaches a regulated voltage of
approximately 14.4 V, the field current is cut off.
When the battery voltage drops below the regulated
voltage, the voltage regulator regulates the output
voltage to a constant level by controlling the field cur-
rent.
In addition, when the field current is constant, the
alternator output voltage rises as the engine speed
increases.
SYSTEM DIAGRAM
AK400308
Alternator
B
Stator coil
Engine-ECU
<M/T> or
Engine-A/T-ECU
<A/T>
G
S
L
FR
<4G1>
Voltage regulator
Charge warning light
Ignition switch
Battery
Field coil
+
–
AB
ALTERNATOR SPECIFICATIONS
Item
4G1
4G6
Type
Battery voltage sensing
Rated output V/A
12/80
12/110
Voltage regulator
Electronic built-in type
CHARGING SYSTEM
ENGINE ELECTRICAL
16-3
SERVICE SPECIFICATIONS
M1161000300258
Item
Standard value
Limit
Alternator output line voltage drop (at 30 A) V
−
maximum 0.3
Regulated voltage ambient
temperature at voltage regulator V
−20° C
14.2
− 15.4
−
20
° C
13.9
− 14.9
−
60
° C
13.4
− 14.6
−
80
° C
13.1
− 14.5
−
Output current
−
70 % of normal output current
SPECIAL TOOL
M1161000600163
Tool
Number
Name
Use
MB991519
Alternator test harness
Checking the alternator
("S" terminal voltage)
ON-VEHICLE SERVICE
ALTERNATOR OUTPUT LINE VOLTAGE DROP TEST
M1161000900346
AK203361AD
Alternator
Ammeter (clamp-type)
Voltmeter (digital-type)
"B" terminal
Battery
This test determines whether the wiring from the
alternator "B" terminal to the battery (+) terminal
(including the fusible line) is in a good condition or
not.
1. Always be sure to check the following before the
test.
• Alternator installation
• Drive belt tension
(Refer to GROUP 11A
− On-vehicle Service <4G1>
or GROUP 11C
− On-vehicle Service
• Fusible link
• Abnormal noise from the alternator while the
engine is running
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