2007 MITSUBISHI LANCER EVOLUTION alternator

MPI -Troubleshooting13A-111
Terminal No.Normal condition Check condition (Engine condition) Check item
37Power steering fluid
pressure switchEngine: Idling after
warming upWhen steering wheel
is stationarySystem voltage
When steering wheel
is turned1 V or less
38Engine control relayIgnition switch: “LOCK” (OFF)System voltage
Ignition switch: “ON”1 V or less
39Fuel pump relay 3While engine is idling, suddenly depress the
accelerator pedal.Temporarily rises slightly
from 1 V or less.
41Alternator FR
terminalDEngine: After warm-up, idle operation
DRadiator fan: Not operating
DHead lamp: OFF→ON
DStop lamp: OFF→ON
DRear deffogger switch: OFF→ONVoltage decrease
44Intercooler water
spray switch (Auto)DIgnition switch: “ON”
DIntercooler water spray switch: ON1 V or less
DIgnition switch: “ON”
DIntercooler water spray switch: OFFSystem voltage
45A/C switchEngine: Idle operationTurn the A/C switch
OFF0.5 V or less
DA/C switch: ON
DA/C setting
temperature
When room tem-
perature is 25_C
or more: Max
Cool
When room tem-
perature is 25_C
or less: Max. HotSystem voltage
53Secondary air control
solenoid valveIgnition switch: “ON”System voltage
54Oxygen sensor
heater(Rear)
Engine: Idling after warming up1 V or less
heater(Rear)
Engine speed: 5,000r/minSystem voltage
55Intercooler water
sprayrelay
Ignition switch: “ON”System voltage
spray relay
Ignition switch: “LOCK” (OFF)1 V or less
58Tachometer signalEngine speed: 3,000r/min0.3 - 3.0 V
60Oxygen sensor
heater(front)
Engine: Idling after warming up1 V or less
heater(front)
Engine speed: 5,000r/minSystem voltage
71Ignition switch - STEngine: Cranking8 V or more

ENGINE COOLING -Water Pump14-13
WATER PUMP
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.
REMOVAL AND INSTALLATION
Pre-remobal and Post-installation Operation
DEngine Coolant Draining and Supplying (Refer to P.14-6.)
DTiming Belt Removal and installation (Refer to GROUP 11A.)
1
Bolt specifications
28×22
2
23±3 N·m
14±1 N·m
Nominal diameter×Nominal length mm
8×70
8×14
8×22 8×25
3 4
22±4 N·m
Removal steps
1. Alternator brace
2. Water pump
3. Water pump Gasket
"AA4. O-ring
INSTALLATION SERVICE POINT
"AAO-RING INSTALLATION
Fit an O-ring into the O-ring groove located at the end of
the water inlet pipe and apply water to the O-ring or the
inside of the mounting surface of the water pump for insertion.
CAUTION
Do not let the O-ring get contaminated with grease, such
as engine oil.Water pump
O-ring
Water inlet pipe

INTAKE AND EXHAUST -Intake ManifoldINTAKE AND EXHAUST -Intake Manifold15-17
28 2325
26
2719
20 2221
23
24
30
23
29
20±2 N·m
20±2 N·m5.0±1.0 N·m
20±2 N·m
9.0±1.0 N·m
22±4 N·m 20±2 N·m 36±6 N·m
9.0±1.0 N·m
31±3 N·m 9.0±1.0 N·m 11±1 N·m
19. Vacuum hose
20. Fuel pressure solenoid valve
21. PCV hose
DAlternator (Refer to GROUP 16.)
22. Vacuum hose and Vacuum pipe
assembly connecting bolt
23. Vacuum tank, EGR solenoid valve,
Secondary air control solenoid
valve, Vacuum hose assembly24. Intake manifold stay
25. EGR valve
26. EGR gasket
27. Alternator brace stay
28. Intake manifold
29. Intake manifold gasket
30. Purge control solenoid valve
assembly
REMOVAL SERVICE POINTS
AA"DELIVERY PIPE, INJECTOR AND FUEL
PRESSURE REGULATOR ASSEMBLY REMOVAL
The delivery pipe must be removed with the injector and
fuel pressure regulator attached.
Caution
Take care not to drop delivery pipe, injector, or fuel
pressure regulator assembly when removing those parts.

16-1
ENGINE
ELECTRICAL
CONTENTS
CHARGING SYSTEM 2................
GENERAL INFORMATION 2................
SERVICE SPECIFICATIONS 3...............
SPECIAL TOOL 3..........................
ON-VEHICLE SERVICE 4...................
Alternator Output Line Voltage Drop Test 4......
Output Current Test 5........................
Regulated Voltage Test 7.....................
Waveform Check Using An Analyzer 8..........
ALTERNATOR 10..........................
STARTING SYSTEM 17................
GENERAL INFORMATION 17...............
SERVICE SPECIFICATIONS 17..............
ON-VEHICLE SERVICE 18..................
STARTER 18..............................
IGNITION SYSTEM 26.................
GENERAL INFORMATION 26...............
SERVICE SPECIFICATIONS 27..............
SPECIAL TOOL 27.........................
ON-VEHICLE SERVICE 28..................
Ignition Coil (With Built-in Power Transistor)
Check 28...................................
Resistive Cord Check 28.....................
Spark Plug Check, Cleaning and Replacement 29
Camshaft Position Sensor Check 29...........
Crank Angle Sensor Check 29................
Detonation Sensor Check 29..................
Waveform Check Using An Analyzer 30........
IGNITION COIL 34.........................
CAMSHAFT POSITION SENSOR 35.........
CRANK ANGLE SENSOR 35................
DETONATION SENSOR 37.................

ENGINE ELECTRICAL -Charging System16-2
CHARGING SYSTEM
GENERAL INFORMATION
The charging system uses the alternator output
to keep the battery charged at a constant level
under various electrical loads.
OPERATION
Rotation of the excited field coil generates AC voltage in
the stator.
This alternating current is rectified through diodes to DC
voltage having a waveform shown in the illustration at left.
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
current increases and it falls as the field current
decreases. When the battery voltage (alternator
S terminal voltage) reaches a regulated voltageof 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 current.
In addition, when the field current is constant, the
alternator output voltage rises as the engine speed
increases.
SYSTEM DIAGRAM
Stator coil
Field coil
Voltage
regulatorEngine-ECU
Charging
warning lampIgnition
switchBattery B
G
L
FRS
Voltage
Time
Approximately
14.4 V

ENGINE ELECTRICAL -Charging System16-3
ALTERNATOR SPECIFICATIONS
ItemsSpecifications
TypeBattery voltage sensing
Rated output V/A12/90
Voltage regulatorElectronic built-in type
SERVICE SPECIFICATIONS
ItemsStandard valueLimit
Alternator output line voltage drop (at 30 A) V-max. 0.3
Regulated voltage ambient
tempatvoltageregulatorV
-20_C14.2 - 15.4-
temp. atvoltage regulatorV
20_C13.9 - 14.9-
60_C13.4 - 14.6-
80_C13.1 - 14.5-
Output current-70 % of normal output current
Rotor coil resistanceΩApprox. 3 - 5-
Protrusion length of brush mm-2
SPECIAL TOOL
ToolNumberNameUse
MB991519Alternator test
harnessChecking the alternator (S terminal voltage)

ENGINE ELECTRICAL -Charging System16-4
ON-VEHICLE SERVICE
ALTERNATOR OUTPUT LINE VOLTAGE DROP TEST
Alternator
Terminal BVoltmeterAmmeter
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.
DAlternator installation
DAlternator drive belt tension
(Refer to GROUP 11 - On-vehicle Service.)
DFusible link
DAbnormal noise from the alternator while
the engine is running
(2) Turn the ignition switch to the “LOCK” (OFF)
position.
(3) Disconnect the negative battery cable.
(4) Disconnect the alternator output wire from the
alternator “B” terminal and connect a DC test
ammeter with a range of 0 - 100 A in seriesbetween the “B” terminal and the disconnected
output wire. (Connect the (+) lead of the
ammeter to the “B” terminal, and then connect
the ( - ) lead of the ammeter to the disconnected
output wire.)
NOTE
An inductive-type ammeter which enables
measurements to be taken without
disconnecting the alternator output wire should
be recommended. Using this equipment will
lessen the possibility of a voltage drop caused
by a loose “B” terminal connection.
(5) Connect a digital-type voltmeter between the
alternator “B” terminal and the battery (+)
terminal. (Connect the (+) lead of the voltmeter
to the “B” terminal and the connect the ( - ) lead
of the voltmeter to the battery (+) cable.)

ENGINE ELECTRICAL -Charging System16-5
(6) Reconnect the negative battery cable.
(7) Connect a tachometer or the MUT-II.
(Refer to GROUP 11 - On-vehicle Service.)
(8) Leave the hood open.
(9) Start the engine.
(10)With the engine running at 2,500 r/min, turn
the headlamps and other lamps on and off
to adjust the alternator load so that the value
displayed on the ammeter is slightly above 30
A.
Adjust the engine speed by gradually
decreasing it until the value displayed on the
ammeter is 30 A. Take a reading of the value
displayed on the voltmeter at this time.
Limit: max. 0.3 V
NOTE
When the alternator output is high and the value
displayed on the ammeter does not decrease
until 30 A, set the value to 40 A. Read the
value displayed on the voltmeter at this time.
When the value range is 40 A, the limit is max.
0.4 V.(11) If the value displayed on the voltmeter is above
the limit value, there is probably a malfunction
in the alternator output wire, so check the wiring
between the alternator “B” terminal and the
battery (+) terminal (including fusible link).
If a terminal is not sufficiently tight or if the
harness has become discolored due to
overheating, repair and then test again.
(12)After the test, run the engine at idle.
(13)Turn off all lamps and the ignition switch.
(14)Remove the tachometer or the MUT-II.
(15)Disconnect the negative battery cable.
(16)Disconnect the ammeter and voltmeter.
(17)Connect the alternator output wire to the
alternator “B” terminal.
(18)Connect the negative battery cable.
OUTPUT CURRENT TEST
Charging warning lampVoltmeter
Ammeter
Ignition switch
Alternator relayLoad
Battery
Engine-ECUAlternatorFR
L
S
G
+ -+-
B