engine MITSUBISHI LANCER 2006 Repair Manual

CHARGING SYSTEM
ENGINE ELECTRICAL16-9
WAVEFORM CHECK USING AN OSCILLOSCOPE
M1161001200124
MEASUREMENT METHOD
AK100002
Alternator
"B" terminal CH1
AC
Co
nnect the oscillo scope specia l p a tt erns p i ck-up to
the alternato
r "B" terminal.
STANDARD W A VEFORM
Observ ation Conditi ons
FunctionSpecial pattern
Pattern heightVariable
Variable knobAdjust while viewing the waveform.
Pattern selectorRaster
Engine speedCurb idle speed
AKX00189
0.4 (V)
0.2
0
–0.2
–0.4
Voltage at
alternator
"B" terminal
Time
AG
NOTE:
AKX00190
The volt age waveform of th e alte rnator "B" t e rminal
can u
ndulate as sho w n in th e illustratio n . This wave
-
form is produce d when t he regu lator operate s
accordin
g to fluctu ation s in the alterna t or loa d (cu r
-
rent), and is normal fo r the alterna t or . In ad dition,
wh
en the volt ag e wavef o rm re ache s an excessively
high
value (app roximate ly 2 V or higher at idle ), it
of
ten indicates an o pen circuit du e to a brown fuse
be
twe e n a l te rn at or "B " t e r m in al an d ba tt er y , b u t n o t a
defective alte
rnator .

CHARGING SYSTEM
ENGINE ELECTRICAL16-10
EXAMPLE OF ABNORMAL WAVEFORMS
NOTE: .
1. The size of the waveform patterns differs largely, depending on the adjustment of the variable knob on the
oscilloscope.
2. Identification of abnormal waveforms is easier when th ere is a large output current (regulator is not oper-
ating). (Waveforms can be observed when the headlamps are illuminated.)
3. Check the conditions of the charging warning lamp (illuminated/not illum inated). Also, check the charging
system totally.
Abnormal waveformProblem cause
Example 1
AKX00191
Open diod e
Exampl e 2
AKX00192
Shor t in diode

CHARGING SYSTEM
ENGINE ELECTRICAL16-11
Example 3
AKX00193
Broken wire in
stator coil
Examp l e 4
AKX00194
Shor t in st ator
coil
Exampl e 5
AKX00195
At this time, the charg i ng warn ing lamp is illuminated .
Open
suppleme
n t a ry
d
i ode
Abn o rm al waveform P roble m caus e

CHARGING SYSTEM
ENGINE ELECTRICAL16-12
ALTERNATOR ASSEMBLY
REMOVAL AND INSTALLATION <4G1>
M1161001400548
Pre-removal Operation
•Under Cover Removal
•Drive Belt Removal (Refer to GROUP 11A - Crankshaft
Pulley
P.11A-16).
Post-installation Operation
•Drive Belt Installation (Refer to GROUP 11A - Crankshaft
Pulley P.11A-16).
•Drive Belt Tension Adjustment (Refer to GROUP 11A -
On-vehicle Service P.11A-7).
•Under Cover Installation
AC303729
1
2
4
3
44 ± 10 N·m
23 ± 2 N·m 24 ± 3 N·m 12 ± 2 N·m
AB
13 ± 3 N·m
Removal steps
1.Power steering pressure hose
clamp
2.Alternator connector and terminal
3.Alternator adjusting brace
<<A>>4.Alternator assembly
REMOV
A L SER VICE POINT
<<A>> ALTERNA T O R ASSEMBL Y
REMOV
A L
Remove the a l tern ator assembly from above the
vehicle.

CHARGING SYSTEM
ENGINE ELECTRICAL16-13
REMOVAL AND INSTALLATION <4G6>
M1161001401347
Pre-removal Operation
•Battery and Battery Tray Removal
•Under Cover Removal
•Strut Tower Bar Removal (Refer to GROUP 42 P.42-9).
•Drive Belt Removal (Refer to GROUP 11C - Crankshaft
Pulley P.11C-16).
•Air Cleaner Assembly Remo val (Refer to GROUP 15 P.15-3).
Post-installation Operation
•Air Cleaner Assembly Installation (Refer to GROUP 15 P.15-3).
•Drive Belt Installation (Refer to GROUP 11C - Crankshaft
Pulley P.11C-16).
•Strut Tower Bar Installation (Refer to GROUP 42 P.42-9).
•Drive Belt Tension Adjustment (Refer to GROUP 11C -
On-vehicle Service
P.11C-7).
•Under Cover Installation
•Battery and Battery Tray Installation
AC504936
1 1
2
3
18 ± 3 N·m 12 ± 2 N·m
<M/T> <A/T>
AB
Removal steps
1.Shift cable connection<<A>>2.Shift cable and shift cable bracket
assembly
3.Vehicle speed sensor connector
Removal steps (Continued)

AC303827
65
84
9
7
22 ± 4 N·m
23 ± 3 N·m
8.8 ± 1.0 N·m 44 ± 10 N·m
AB
13 ± 3 N·m
Removal steps
4.Battery wiring harness clamp
5.Engine oil pressure switch
connection
6.Alternator connector and terminal
<<B>>7.Alternator assembly
8.Water pump pulley
9.Alternator brace
CHARGING SYSTEM
ENGINE ELECTRICAL16-14
REMOV
A L SER V ICE POINT
<<A>> SHIFT CABLE AND SHIFT CABLE
BRACKET ASSEMBL
Y REMOV A L
Remove the shift cable bracket inst allation bolt with
the shif
t ca ble inst alled o n the shif t cable bracket,
and remove
the shif t cable and shif t cable bracket
assembly fro
m the transmission.
<<B>> ALTERNA T O R ASSEMBL Y
REMOV
A L
AC302930 AB
Alternator
assemnly
Af
ter re moving the alternato r assembly inst allation
bolt
s a nd nu t, move the alte rnator a sse mbly to the
transmission side an
d remove the alternato r assem
-
bly upward the engine roo m thr ough th e clearan ce
between t
he tran smission and the inlet ma nifold.

CHARGING SYSTEM
ENGINE ELECTRICAL16-15
DISASSEMBLY AND REASSEMBLY
M1161001600166
AK202845
1
2 3
4
5
6
7
8 9
10
11
12
1314
AE
4.4 ± 1.0 N·m
3.7 ± 0.7 N·m
189 ± 19 N·m
3.7 ± 0.7 N·m
Disassembly steps
<<A>>1.Front bracket assembly
<<B>>2.Alternator pulley
>>B<<3.Rotor
4.Rear bearing
5.Bearing retainer
6.Front bearing
7.Front bracket
<<C>>8.Stator
9.Plate
<<C>>>>A<<10.Regulator assembly
11 .Brush
12.Rubber packing
13.Rectifier
14.Rear bracket
Disassembly steps (Continued)

CHARGING SYSTEM
ENGINE ELECTRICAL16-16
DISASSEMBLY SERVICE POINTS
<<A>>FRONT BRACKET ASSEMBLY
REMOVAL
AK202718
CAUTION
Do not insert the screwdriver blades too deep.
Doing so could damage the stator coil.
Insert the blades of screwdrivers between the front
bracket assembly and stator core, and pry and sepa
-
rate them with the screwdrivers.
<<B>>ALTERNATOR PULLEY REMOVAL
AK202714
CAUTION
Perform operation carefully not to damage the
rotor.
Clamp the rotor in a vise with the pulley facing up to
remove the pulley.
<<C>>STATOR / REGULATOR ASSEMBLY
REMOVAL
AK202778
Solder
Solder
Rectifier
assembly
AB
CAUTION
•Use a 180 − 250 W soldering iron, and finish
unsoldering within four seconds. Diodes will
be damaged by heat if unsoldering time is too
long.
•Avoid applying undue force to the diode
leads.
1. Unsolder the stator leads from the main diode of the rectifier assembly when the stator is removed.
2. When removing the rectifier assembly from the regulator assembly, undo the soldered points on
the rectifier assembly.
REASSEMBLY SERVICE POINTS
>>A<<REGULATOR ASSEMBLY INSTAL-
LATION
AK202779
Wire
AB
AK202830
Rear bracket
Brush
Wire
AB
After installing the regulator assembly, insert a piece
of wire through the hole in the rear bracket while
pressing the brush to keep the brush against move
-
ment.
NOTE: Holding the brush with the wire facilities
installation of the rotor.

CHARGING SYSTEM
ENGINE ELECTRICAL16-17
>>B<< ROTOR INSTALLATION
AK202779
Wire
AB
Remove the br ush holding wire af ter the rotor ha s
been inst
alled.
INSPECTION
M1161 0017 0015 2
ROTO R
AK202735
1. Measure th e resist a n ce b e tween the two slip rings
of the rot o r coil to check t he co ntinu i ty between
th em.
Repla c e th e r o to r if th e resist ance is no t within the
st
a ndard valu e range .
St andard va lue: 3 − 5 Ω
2.Check t he co ntinu i ty between the slip rings and
core.
AK202736
3. If cont inuity is pre s ent, repla c e th e rotor .
STA T OR
AK202716
1.Check t he co ntinu i ty between coil le ads.
If there is no con t inuity , replace the st a t or .
AK202717
2.Check t he co ntinu i ty between coil and core .
If there is no con t inuity , replace the st a t or .
RECTIFIER ASSEBMLY
AK202803
1.Check t he co ndition o f the (+) h eat sink by
checkin g contin uity be twe en t he (+) heat sink and
e a ch o f the st a t or coil lead conn ecting termina l s.
If cont inuity is pre s ent for both terminals, the
d
i ode is shorte d. Repla c e th e rectifie r assembly .

AK202802
CHARGING SYSTEM
ENGINE ELECTRICAL16-18
2.Check t he co ndition of the (−) heat sink by
checkin
g
con
t
inuity b
e
tween th e (
−) he at sink and
ea
ch o
f
the st
a
t
or co
il lead conne
cting termina l s.
If con t inu i ty is p r ese n t in bot h d i re ctio ns, the dio de
is shorted.
Re place the rectifier assembly .
AK202804
3.Check t he co ndition of the diode t r io by testing
continuity of ea ch o f the th ree diodes using a
circuit tester con necte d to both sides of the dio de.
Co nnect in a p o la rity a nd then reverse the polarity
fo r each test.
If continuity exist s or no cont inuity exist s for bo th
po
larities, the d i ode is d e fective . Repla c e th e
rectifier assembly if a
n y o f the d i odes is defe c tive.
BRUSH
AK202808
Protrusion
length
AB
1.Measure the lengt h of the prot rusion o f the bru s h.
Replace the b r ush if the protrusion lengt h is
shorter than th e limit .
Limit: 2 mm mini mum
2.Unsolde r the lead o f the br ush. The bru s h will
come out, b e coming ready for removal.
AK202834
Solder
AB
3.I n st all a ne w b r ush b y pu sh in g it int o the h o lde r a s
shown in the d r awing a nd soldering th e lea d .