MITSUBISHI LANCER EVOLUTION 2007 Service Repair Manual

ENGINE ELECTRICAL -Charging System16-9
Voltage at
alternator
B terminal0.4
0.2
0
- 0.2
- 0.4
Time
NOTE
The voltage waveform of the alternator B terminal can undulate
as shown at left. This waveform is produced when the regulator
operates according to fluctuations in the alternator load
(current), and is normal for the alternator.
In addition, when the voltage waveform reaches an
excessively high value (approximately 2 V or higher at idle),
it often indicates an open circuit due to a brown fuse between
alternator B terminal and battery, but not a defective alternator.

ENGINE ELECTRICAL -Charging System16-10
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 waveformsProblem
causeAbnormal waveformsProblem
cause
Example 1Open diodeExample 4Short in
stator coil
Example 2Short in diodeExample 5Open
supplementa-
ry diode
Example 3Broken wire
in stator coil
At this time, the charging warning lamp
is illuminated.
ALTERNATOR
REMOVAL AND INSTALLATION
Caution
If the vehicle is equipped with the Brembo disc brake, during maintenance, take care not to contact
the parts or tools to the caliper because the paint of caliper will be scratched.
Pre-removal and Post-installation Operation
DUnder Cover Removal and Installation (Refer to GROUP 51 - Front Bumper.)
DDrive Belt Tension Check (Refer to GROUP 11A - On-vehicle Service.) <After installation only>
DStrut Tower Bar Removal and Installation (Refer to GROUP 42.)
DCrossmember Bar Removal and Installation (Refer to GROUP 32 - Engine Roll Stopper, Centermember.)
DFront Exhaust Pipe Assembly Removal and Installation (Refer to GROUP 15.)

ENGINE ELECTRICAL -Charging System16-11
1
234
5
8.8±1.0 N·m 22±4 N·m
23±3 N·m11±1 N·m
13±1 N·m
8
(Engine oil)
679
10
20±2 N·m 36±6 N·m
1211
44±10 N·m
14±3 N·m
13
1415 18
1617
9.0±1.0 N·m
9.0±1.0 N·m5.0±1.0 N·m
Removal steps
1. Oil level gauge and guide assembly
2. O-ring
3. Fuel pressure solenoid valve
connector
4. Fuel pressure solenoid valve
assembly
5. Detonation sensor connector
6. Purge control solenoid valve
connector
7. Purge control solenoid valve assembly
8. Injector connector
AA"9. Delivery pipe, injector, and fuel
pressure regulator assembly10. Insulator
11. Insulator
AB"12. Drive belt
13. Alternator connector
DEngine mounting
(Refer to GROUP 32.)
AC"14. Alternator
15. Water pump pulley
16. Alternator brace
17. Oxygen sensor connector
18. Alternator brace stay

ENGINE ELECTRICAL -Charging System16-12
REMOVAL SERVICE POINTS
AA"DELIVERY PIPE, INJECTOR, AND FUEL
PRESSURE REGULATOR ASSEMBLY REMOVAL
After loosening the installed parts, set the related parts
aside to make some space for removing the alternator.
AB"DRIVE BELT REMOVAL
Due to the adoption of the Serpentine drive system with
the auto-tensioner, the following operation is required:
1. Insert the 12.7sq. spinner handle into the tool hole of
the auto-tensioner and rotate it counterclockwise until
the auto-tensioner reaches to the stopper.
2. Align hole A with hole B for fixing by inserting the L-shaped
hexagon wrench, then remove the drive belt.
Caution
When the drive belt is reused, use a chalk to
indicate an arrow of rotation direction on the
back of the belt so that it can be re-assembled in
the same direction as before.
AC"ALTERNATOR REMOVAL
Push up the engine with a garage jack to the top and
remove the alternator upward from the engine room.
Hole A
L-shaped
hexagon
wrench
Hole B

ENGINE ELECTRICAL -Charging System16-13
DISASSEMBLY AND REASSEMBLY
1
23
4 7654
891012
111314
Disassembly steps
AA"1. Front bracket assembly
AB"2. Alternator pulley
"BA3. Rotor
4. Rear bearing
5. Bearing retainer
6. Front bearing
7. Front bracketAC"8. Stator
9. Plate
AC""AA10. Regulator assembly
11. Brush
12. Packing
13. Rectifier
14. Rear bracket

ENGINE ELECTRICAL -Charging System16-14
DISASSEMBLY SERVICE POINTS
AA"FRONT BRACKET ASSEMBLY REMOVAL
Insert a flat tip screwdrivers or the like in the clearance between
the front bracket assembly and stator core, to pry open and
separate the stator and front bracket.
Caution
Do not insert a screwdriver too far, or the stator coil gets
damaged.
AB"ALTERNATOR PULLEY REMOVAL
Face pulley side upward, fix the rotor with a work bench
and remove the pulley.
Caution
Use care not to damage the rotor.
AC"STATOR/REGULATOR ASSEMBLY REMOVAL
1. Unsolder the stator with a soldering iron (180 to 250
W). Complete this work within four seconds not to transfer
heat to the diode.
2. When removing rectifier from the regulator assembly,
remove the soldered sections to 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.
REASSEMBLY SERVICE POINTS
"AAREGULATOR ASSEMBLY INSTALLATION
After installing the regulator assembly, insert a wire into the
hole provided on the rear bracket while pressing in the brush
to fix the brush.
NOTE
The brush is fixed when a wire is inserted, making rotor
installation easier.
SolderedRectifier
assembly
Soldered
Wire
Rear bracket
BrushWire

ENGINE ELECTRICAL -Charging System16-15
"BAROTOR INSTALLATION
After installing the rotor, remove the wire used to fix the brush.
INSPECTION
ROTOR CHECK
1. Check the continuity between the rotor coil slip rings,
and replace the rotor if the resistance value is not at
the standard value.
Standard value: 3 - 5Ω
2. Check the continuity between the slip ring and core, and
if there is continuity, replace the rotor.
STATOR CHECK
1. Check the continuity between the coil leads, and if there
is continuity, replace the stator.
2. Check the continuity between the coil and core, and if
there is continuity, replace the stator.
Wire

ENGINE ELECTRICAL -Charging System16-16
RECTIFIERS CHECK
1. Inspect the (+) heat sink by checking the continuity
between the (+) heat sink and stator coil lead wire
connection terminal using a tester probe.
If there is a continuity at both, the diode is short circuited,
so replace the rectifier.
2. Inspect the ( - ) heat sink by checking the continuity
between the ( - ) heat sink and stator coil lead wire
connection terminal using a tester probe.
If there is a continuity at both, the diode is short circuited,
so replace the rectifier.
3. Check the diode trio by connecting an ohmmeter to both
ends of each diode and check the continuity of the three
diodes.
If there is a continuity at both ends, or if there is no
continuity, the diode is damaged so replace the rectifier.
BRUSH CHECK
1. Measure the length of the brush protrusion shown in the
illustration, and replace the brush if the measured value
is below the limit value.
Limit: 2 mm or less
2. The brush can be removed if the solder of the brush
lead wire is removed.
3. When installing a new brush, insert the brush into the
holder as shown in the illustration, and then solder the
lead wires.
Protrusion
length
Soldered

ENGINE ELECTRICAL -Starting System16-17
STARTING SYSTEM
GENERAL INFORMATION
If the ignition switch is turned to the “START”
position, current flows in the pull-in and holding
coils provided inside magnetic switch, attracting
the plunger. When the plunger is attracted, the
lever connected to the plunger is actuated to
engage the starter clutch.
On the other hand, attracting the plunger will turn
on the magnetic switch, allowing the B terminaland M terminal to conduct. Thus, current flows to
engage the starter motor.
When the ignition switch is returned to the “ON”
position after starting the engine, the starter clutch
is disengaged from the ring gear.
An overrunning clutch is provided between the
pinion and the armature shaft, to prevent damage
to the starter.
SYSTEM DIAGRAM
Pull-in coilHolding coil
Ignition
switch
BatteryArmature
Brush
YokePlunger
Lever
Over-running
clutch
Pinion shaft
STARTER MOTOR SPECIFICATIONS
ItemsSpecifications
TypeReduction drive with planetary gear
Rated output kW/V1.2/12
No. of pinion teeth8
SERVICE SPECIFICATIONS
ItemsStandard valueLimit
Pinion gap mm0.5 - 2.0-
Commutator outer diameter mm29.428.8
Commutator runout mm0.050.1
Commutator undercut mm0.50.2
Brush length mm-7.0

ENGINE ELECTRICAL -Starting System16-18
STARTER
REMOVAL AND INSTALLATION
Pre-removal and Post-installation Operation
DUnder Cover Removal and Installation (Refer to GROUP51 - Front Bumper.)
DCrossmember Bar Removal and Installation (Refer to GROUP 32 - Engine Roll Stopper, Centermember.)
DFront Exhaust Pipe Assembly Removal and Installation (Refer to GROUP 15.)
30±3 N·m
1 2
30±3 N·m 13±2 N·m
Removal steps
1. Starter connector
2. Starter
INSPECTION
PINION GAP ADJUSTMENT
1. Disconnect field coil wire from M-terminal of magnetic
switch.
2. Connect a 12 V battery between S-terminal and
M-terminal.
3. Set switch to “ON” position, and pinion will move out.
Caution
This test must be performed quickly (in less than
10 seconds) to prevent coil from burning.
4. Check pinion to stopper clearance (pinion gap) with a
thickness gauge.
Standard value: 0.5 - 2.0 mmS
Switch
Battery
Field coil wire M
B
Stopper
Pinion gap
Pinion