air condition MITSUBISHI LANCER EVOLUTION 2007 Service Workshop Manual

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

MPI -Troubleshooting13A-112
Terminal No.Normal condition Check condition (Engine condition) Check item
72Intake air
temperature sensorIgnition switch: “ON”Intake air
temperature: - 20_C3.8 - 4.4 V
Intake air
temperature: 0_C3.2 - 3.8 V
Intake air
temperature: 20_C2.3 - 2.9 V
Intake air
temperature: 40_C1.5 - 2.1 V
Intake air
temperature: 60_C0.8 - 1.4 V
Intake air
temperature: 80_C0.4 - 1.0 V
75Oxygen sensor
(Rear)DTransmission: Second gear
DDriving with the throttle widely open
DEngine: 3,500 r/min or more0.6 - 1.0 V
76Oxygen sensor (front)Engine: Running at 2,500 r/min after warmed
up (Check using a digital type voltmeter)0↔0.8 V
(Changes repeatedly)
80Backup power supplyIgnition switch: “LOCK” (OFF)System voltage
81Sensor impressed
voltageIgnition switch: “ON”4.9 - 5.1 V
82Ignition switch - IGIgnition switch: “ON”System voltage
83Engine coolant
temperature sensorIgnition switch: “ON”Coolant temperature:
-20_C3.9 - 4.5 V
Coolant temperature:
0_C3.2 - 3.8 V
Coolant temperature:
20_C2.3 - 2.9 V
Coolant temperature:
40_C1.3 - 1.9 V
Coolant temperature:
60_C0.7 - 1.3 V
Coolant temperature:
80_C0.3 - 0.9 V
84Throttle position
sensorIgnition switch: “ON”Set throttle valve to
idle position0.535 - 0.735 V
Fully open throttle
valve4.5 - 5.0 V
85Barometric pressure
sensor
Ignition switch: “ON”Altitude: 0 m3.8 - 4.2 V
sensor
Altitude: 600 m3.5 - 3.9 V
Altitude: 1,200 m3.2 - 3.8 V
Altitude: 1,800 m3.0 - 3.4 V

MPI -Troubleshooting13A-113
Terminal No.Normal condition Check condition (Engine condition) Check item
86Vehicle speed sensorDIgnition switch: “ON”
DMove the vehicle slowly forward0↔5V
(Changes repeatedly)
88Camshaft position
sensor
Engine: Cranking0.4 - 3.0 V
sensor
Engine: Idle operation0.5 - 2.0 V
89Crank angle sensorEngine: Cranking0.4 - 4.0 V
Engine: Idle operation1.5 - 2.5 V
90Air flow sensorEngine: Idle operation2.2 - 3.2 V
Engine speed: 2,500 r/min
91Intercooler water
spray switch (Manual)DIgnition switch: “ON”
DIntercooler water spray switch: ON1 V or less
DIgnition switch: “ON”
DIntercooler water spray switch: OFFSystem voltage

MPI -Troubleshooting13A-114
CHECK CHART FOR RESISTANCE AND CONTINUITY
BETWEEN TERMINALS
1. Turn the ignition switch to “LOCK” (OFF) position.
2. Disconnect the engine-ECU connector.
3. Measure the resistance and check for continuity between
the terminals of the engine-ECU harness-side connector
while referring to the check chart.
NOTE
(1) When measuring resistance and checking continuity,
a harness for checking contact pin pressure should
be used instead of inserting a test probe.
(2) Checking need not be carried out in the order given
in the chart.
Caution
If the terminals that should be checked are mistaken,
or if connector terminals are not correctly shorted
to earth, damage may be caused to the vehicle wiring,
sensors, engine-ECU and/or ohmmeter.
Be careful to prevent this!
4. If the ohmmeter shows any deviation from the standard
value, check the corresponding sensor, actuator and
related electrical wiring, and then repair or replace.
5. After repair or replacement, recheck with the ohmmeter
to confirm that the repair or replacement has corrected
the problem.
Engine-ECU Harness Side Connector Terminal Arrangement
Terminal No.Inspection itemNormal condition (Check condition)
1-12No. 1 injector2-3Ω(at 20_C)
14 - 12No. 2 injector
2-12No. 3 injector
15 - 12No. 4 injector

MPI -Troubleshooting13A-115
Terminal No. Normal condition (Check condition)Inspection item
3-12Fuel pressure control solenoid valve28 - 36Ω(at 20_C)
4-12Stepper motor coil (A1)28 - 33Ω(at 20_C)
17 - 12Stepper motor coil (A2)
5-12Stepper motor coil (B1)
18 - 12Stepper motor coil (B2)
6-12EGR control solenoid valve36 - 44Ω(at 20_C)
9-12Purge control solenoid valve22 - 26Ω(at 20_C)
11 - 1 2Waste gate solenoid valve62 - 74Ω(at 20_C)
13 - Body earthENGINE-ECU earthContinuity (0Ω)
26 - Body earthENGINE-ECU earth
53 - 12Secondary air control solenoid valve28 - 36Ω(at 20_C)
54 - 12Oxygen sensor heater (Rear)11 - 1 8Ω(at 20_C)
60 - 12Oxygen sensor heater (Front)4.5 - 8.0Ω(at 20_C)
72 - 92Intake air temperature sensor13 - 17 kΩ(When intake air temperature is - 20_C)
5.7 - 6.7 kΩ(When intake air temperature is 0_C)
2.3 - 3.0 kΩ(When intake air temperature is 20_C)
1.0 - 1.5 kΩ(When intake air temperature is 40_C)
0.56 - 0.76 kΩ(When intake air temperature is 60_C)
0.30 - 0.42 kΩ(When intake air temperature is 80_C)
83 - 92Engine coolant temperature sensor14 - 17 kΩ(When coolant temperature is - 20_C)
5.1 - 6.5 kΩ(When coolant temperature is 0_C)
2.1 - 2.7 kΩ(When coolant temperature is 20_C)
0.9 - 1.3 kΩ(When coolant temperature is 40_C)
0.48 - 0.68 kΩ(When coolant temperature is 60_C)
0.26 - 0.36 kΩ(When coolant temperature is 80_C)

MPI -Troubleshooting13A-116
INSPECTION PROCEDURE USING AN
ANALYZER
AIR FLOW SENSOR
Measurement Method
1. Disconnect the air flow sensor connector, and connect
the special tool (test harness: MB991709) in between.
(All terminals should be connected.)
2. Connect the analyzer special patterns pickup to air flow
sensor connector terminal No. 3.
Alternate Method (Test harness not available)
1. Connect the analyzer special patterns pickup to
engine-ECU terminal No. 65.
Standard Wave Pattern
Observation conditions
FunctionSpecial patterns
Pattern heightLow
Pattern selectorDisplay
Engine r/minIdle speed
Standard wave pattern
(V)
10
0The time (cycle time) T is reduced when
the amount of intake air increases.
Times T1 and T2 are equal.
Time T
T1 T2
Observation conditions (from conditions above engine speed is increased by racing.)
Time (V)
10
0T
Wave Pattern Observation Points
Check that cycle time T becomes shorter and the frequency increases when the engine speed is increased.
Analyzer
Special
patterns
pickup

MPI -On-vehicle Service13A-133
3. Measure resistance while heating the sensor using a hair
drier.
Normal condition:
Temperature (_C)Resistance (kΩ)
HigherSmaller
4. If the value deviates from the standard value or the
resistance remains unchanged, replace the air flow sensor
assembly.
ENGINE COOLANT TEMPERATURE SENSOR
CHECK
Caution
Be careful not to touch the connector (resin section) with
the tool when removing and installing.
1. Remove the engine coolant temperature sensor.
2. With temperature sensing portion of engine coolant
temperature sensor immersed in hot water, check
resistance.
Standard value:
14 - 17 kΩ(at - 20_C)
5.1 - 6.5 kΩ(at 0_C)
2.1 - 2.7 kΩ(at 20_C)
0.9 - 1.3 kΩ(at 40_C)
0.48 - 0.68 kΩ(at 60_C)
0.26 - 0.36 kΩ(at 80_C)
3. If the resistance deviates from the standard value greatly,
replace the sensor.
4. Apply sealant to threaded portion.
Specified sealant:
3M NUT Locking Part No. 4171 or equivalent
5. Install the engine coolant temperature sensor and tighten
it to the specified torque.
Tightening torque: 29±9 N·m
Intake air
temperature
sensor
Engine coolant
temperature sensor
Equipment
side connector
12

ENGINE COOLING -GeneralInformation/
Service Specifications/Lubricant/Sealant14-2
GENERAL INFORMATION
The cooling system is designed to keep every part
of the engine at appropriate temperature in
whatever condition the engine may be operated.
The cooling method is of the water-cooled, pressure
forced circulation type in which the water pump
pressurizes coolant and circulates it throughout the
engine. If the coolant temperature exceeds the
prescribed temperature, the thermostat opens to
circulate the coolant through the radiator as well
so that the heat absorbed by the coolant may be
radiated into the air.The water pump is of the centrifugal type and is
driven by the drive belt from the crankshaft.
The radiator is the corrugated fin, down flow type.
The cooling fan is controlled by the radiator fan
controller and engine-ECU depend on driving
conditions.
ItemSpecification
Radiator performance kJ/h216,700
SERVICE SPECIFICATIONS
ItemsStandard valueLimit
Radiator cap opening pressure kPa93 - 12383
Range of coolant antifreeze concentration of radiator %30 - 60-
ThermostatValve opening temperature of thermostat_C80±1.5-
Full-opening temperature of thermostat_C93-
Valve lift (at 93_C) mm9.5 or more-
LUBRICANT
ItemSpecified coolantQuantity L
Engine coolantMITSUBISHI GENUINE COOLANT or equivalent6.0Enginecoolant
(including reserve tank)
MITSUBISHIGENUINECOOLANTorequivalent6.0
SEALANT
ItemSpecified sealantRemark
Cylinder block drain plug3M Nut Locking Part No. 4171 or equivalentDrying sealant

INTAKE AND EXHAUST -On-vehicle Service15-5
3. If there is a significant deviation from the standard value,
check the actuator or the waste gate valve: replace
actuator or turbocharger assembly if necessary.
WASTE GATE SOLENOID VALVE CHECK
OPERATION CHECK
1. Connect a hand vacuum pump to the solenoid valve nipple
A.
2. Using a jumper wire, connect between the solenoid valve
terminal and battery terminal.
3. Connecting and disconnecting the jumper wire at the
battery negative terminal to apply a negative pressure,
check tightness.
Jumper wireB nipple
conditionNormal condition
ConnectedOpenedNegative pressure leaks.
ClosedNegative pressure is held.
DisconnectedOpenedNegative pressure is held.
COIL RESISTANCE CHECK
Measure the resistance between solenoid valve terminals.
Standard value: 29 – 35Ω(at 20_C)
AIR BYPASS VALVE CHECK
1. Remove the air bypass valve.
2. Connect the hand vacuum pump to the nipple of the
air bypass valve.
3. Apply a negative pressure of approximately 49 kPa, and
check that air tightness is maintained.
4. Also check operation of the valve.
Standard value:
Negative pressureValve operation
Approximately 53 kPaIt starts opening
Battery B A

ENGINE ELECTRICAL -Ignition System16-26
IGNITION SYSTEM
GENERAL INFORMATION
This system is equipped with two ignition coils (A
and B) with built-in power transistors for the No.
1 and No. 4 cylinders and the No. 2 and No. 3
cylinders respectively.
Interruption of the primary current flowing in the
primary side of ignition coil A generates a high
voltage in the secondary side of ignition coil A.
The high voltage thus generated is applied to the
spark plugs of No. 1 and No. 4 cylinders to generate
sparks. At the time that the sparks are generated
at both spark plugs, if one cylinder is at the
compression stroke, the other cylinder is at the
exhaust stroke, so that ignition of the compressed
air/fuel mixture occurs only for the cylinder which
is at the compression stroke.
In the same way, when the primary current flowing
in ignition coil B is interrupted, the high voltage
thus generated is applied to the spark plugs of
No. 2 and No. 3 cylinders.
The Engine-ECU turns the two power transistors
inside the ignition coils alternately on and off. Thiscauses the primary currents in the ignition coils
to be alternately interrupted and allowed to flow
to fire the cylinders in the order 1-3-4-2.
The Engine-ECU determines which ignition coil
should be controlled by means of the signals from
the camshaft position sensor which is incorporated
in the camshaft and from the crank angle sensor
which is incorporated in the crankshaft. It also
detects the crankshaft position in order to provide
ignition at the most appropriate timing in response
to the engine operation conditions. It also detects
the crankshaft position in order to provide ignition
at the most appropriate timing in response to the
engine operation conditions.
When the engine is cold or operated at high
altitudes, the ignition timing is slightly advanced
to provide optimum performance.
When the automatic transmission shifts gears, the
ignition timing is also retarded in order to reduce
output torque, thereby alleviating shifting shocks.
SYSTEM DIAGRAM
Barometric pressure sensor
Intake air temperature sensor
Engine coolant temperature sensor
Camshaft position sensor
Crank angle sensor
Ignition switch - ST
Vehicle speed signalEngine-ECU
Ignition coil A
Ignition coil B Ignition switch
Spark plugBattery
To tachometerCylinder No. Air flow sensor
1 4
23
Detonation sensor