2006 MITSUBISHI LANCER alternator

CHARGING SYSTEM
ENGINE ELECTRICAL16-6
9. Check that the reading on the voltmeter is equal
to the battery voltage.
NOTE: If the voltage is 0 V, the cause is probably
an open circuit in the wire or fusible link between
the alternator "B" terminal and the battery (+) ter
-
minal.
10.Turn the light switch on to turn on headlamps and
then start the engine.
11.Immediately after setting the headlamps to high
beam and turning the heater blower switch to the
high revolution position, increase the engine
speed to 2,500 r/min and read the maximum
current output value displayed on the ammeter.
Limit: 70 % of normal current output
NOTE: .
•For the nominal current output, refer to the
Alternator Specifications.
•Because the current from the battery will soon
drop after the engine is started, the above step
should be carried out as quickly as possible in
order to obtain the maximum current output
value.
•The current output value will depend on the
electrical load and the temperature of the
alternator body.
•If the electrical load is small while testing, the
specified level of current may not be output
even though the alternator is normal. In such
cases, increase the electrical load by leaving
the headlamps turned on for some time to dis
-
charge the battery or by using the lighting sys-
tem in another vehicle, and then test again.
•The specified level of current also may not be
output if the temperature of the alternator body
or the ambient temperature is too high. In such
cases, cool the alternator and then test again.
12.The reading on the ammeter should be above the
limit value. If the reading is below the limit value
and the alternator output wire is normal, remove
the alternator from the engine and check the
alternator.
13.Run the engine at idle after the test.
14.Turn the ignition switch to the "LOCK" (OFF)
position.
15.Remove the tachometer or the M.U.T.-II/III.
16.Disconnect the negative battery cable.
17.Disconnect the ammeter and voltmeter.
18.Connect the negative battery cable.

CHARGING SYSTEM
ENGINE ELECTRICAL16-7
REGULATED VOLTAGE TEST
M1161001100860
AK300727AC
BatteryIgnition switch
Engine-ECU
Engine-A/T-ECU Ammeter (clamp-type)
Load
Blue
MB991519
Voltmeter (digital-type)Red
Yellow BlackAlternator
B
FR
L
S
G
This test determine s whethe r the volt age regulator
correctly con
t rolling t he alternato r outpu t volt a ge.
1.Always b e su re to check the following b e fore th e
te st.
•Alternator inst allatio n
•Check that the b a ttery inst a lled in th e ve hicle is
fully charg
ed.
(Refer to GROUP 54A − Battery − On-vehicle Service −
Charging
P.54A - 4).
•Drive belt tension
(Ref er to GROUP 1 1 A − On-vehicle Service <4G1>
P.11A-7 or GROUP 1 1 C − On-vehicle Se rvice
<4G6> P.11C-7.)
•Fusible link
•Abnormal noise from the a l tern ator while the
eng
ine is ru nning
2.T u rn the ignition switch to the "LOCK" (OFF)
po sit i on.
3.Disco nnect the ne gative ba ttery cable.
4.Use the special tool Alternat or test harne ss
(MB99151 9) to connect a d i git a l voltmet e r
be tween the alte rnator "S" te rmin al an d earth
[Con nect the (+) lead o f the voltmeter t o the "S"
terminal, and then con nect the (-) lead of the
voltmeter to a secure earth or to the battery (-)
te rmin al].
5.Conn ect a clamp-t y pe DC test ammete r with a
ran ge of 0
− 120 A to the alte rnator "B" te rmin al
ou
tput wire
.
NOTE: The way of d i sconnectin g the a l terna t or
o
u
tput wire an d o f conn ecting the ammete r is pos
-
sibl y no t fo und th e p r oblem th at t he outp u t cur r ent
is dro
ppin g due t o the insu fficient conne ction
b
e tween te rmin al "B" an d the o u tput wire.
6.Reconne ct the negat ive battery ca ble.
7.Conn ect a t a chometer or th e M.U.T . -II/III (Refe r to
GROUP 1 1 A
− On-veh icle Service − Idle speed
check <4G1>
P.11A - 11 or GROUP 1 1 C −
On-vehicle Service − Idle speed check <4G6>
P.11C-11).
8. T u rn the ignition switch to the "ON" position an d
ch ec k t h at th e rea d i n g on t h e vo lt me te r i s eq u a l t o
th e batte ry volt age.
NOTE: If the volt a ge is 0 V , the cause is proba bly
a
n
open circuit in th e wire or fusible link betwee n
th
e alt
e
rnator "S" t e rminal a nd the battery (+) ter
-
minal.
9.T u rn all lamp s and accessorie s of f.
10.St a r t the en gine .
11 . I ncre ase t he eng ine speed to 2,5 00 r/min.
12.Read the va lue disp layed on the voltmeter when
th e alt e rnator output curren t alte rnator b e comes
1 0 A or le ss.
13.If the volt age re adin g conf orms t o the va lue in the
volt age regulation , then the volt age re gula t or is
o perating normally .

CHARGING SYSTEM
ENGINE ELECTRICAL16-8
If the voltage is not within the standard value,
there is a malfunction of the voltage regulator or of
the alternator.
14.After the test, lower the engine speed to the idle speed.
15.Turn the ignition switch to the "LOCK" (OFF) position.
16.Remove the tachometer or the M.U.T.-II/III.
17.Disconnect the negative battery cable.
18.Disconnect the ammeter and voltmeter.
19.Connect the alternator output wire to the alternator "B" terminal.
20.Remove the special tool, and return the connector
to the original condition.
21.Connect the negative battery cable.
Voltage Regulation Table
Standard value:
Inspection terminalVoltage regulator ambient
temperature
°C
Voltage V
Terminal "S"−2014.2 − 15.4
2013.9 − 14.9
6013.4 − 14.6
8013.1 − 14.5

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 ELECTRICAL16-12
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
<>4.Alternator assembly
REMOV
A L SER VICE POINT
<> ALTERNA T O R ASSEMBL Y
REMOV
A L
Remove the a l tern ator assembly from above the
vehicle.

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
<>7.Alternator assembly
8.Water pump pulley
9.Alternator brace
CHARGING SYSTEM
ENGINE ELECTRICAL16-14
REMOV
A L SER V ICE POINT
<> 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.
<> 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.