coolant temperature MITSUBISHI LANCER EVOLUTION 2007 Service Service Manual

MPI -Troubleshooting13A-102
DATA LIST REFERENCE TABLE
NOTE
*1. In a new Vehicle [driven approximately 500 km or less], the air flow sensor output frequency time
is sometimes 10% longer than the standard time.
*2. The injector drive time represents the time when the cranking speed is at 250 r/min or below when
the power supply voltage is 11 V.
*3. In a new vehicle [driven approximately 500 km or less], the injector drive time is sometimes 10%
longer than the standard time.
*4. In a new vehicle [driven approximately 500 km or less], the step of the stepper motor is sometimes
30 steps greater than the standard value.
Item
No.Inspection
itemInspection contentsNormal conditionInspection
procedure
No.Reference
page
11Oxygen
sensor
(front)Engine: After having
warmed up
(Air/fuel mixuture is
made leaner whenWhen at 4,000 r/min,
engine is suddenly de-
celerated200 mV or lessCode No.
P013013A-24
madeleanerwhen
decelerating, and is
made richer when rac-
ing.)When engine is sud-
denly raced600 - 1,000 mV
Engine: After having
warmed up
(The oxygen sensor
(front) signal is used
tochecktheair/fuel
Engine is idling400 mV or less↔
600 - 1,000 mV
(Varies)
to check the air/fuel
mixture ratio, and
control condition is
also checked by the
engine-ECU.)2,500 r/min
12Air flow
sensor*1DEngine coolant
temperature:
Idle operation17 - 43 Hz--
sensor*1temperature:
80 - 95_C
DLightningandall
2,500 r/min40 - 100 Hz
DLightning andall
accessories:
OFF
DTransmission:
NeutralAccelerationAccording to ac-
celeration, fre-
quency is ampli-
fied.
13Intake air
temperature
sensor
Ignition switch: “ON”
or engine runningWhen intake air temper-
ature is - 20_C-20_CCode No.
P011013A-13
sensorWhen intake air tem-
perature is 0_C0_C
When intake air tem-
perature is 20_C20_C
When intake air tem-
perature is 40_C40_C
When intake air tem-
perature is 80_C80_C

MPI -Troubleshooting13A-103
Item
No.Reference
page Inspection
procedure
No. Normal condition Inspection contents Inspection
item
14Throttle
position
Ignition switch: “ON”Set to idle position535 - 735 mVCode No.
P0120
13A-21
position
sensor
Gradually openIncreases in pro-
portion to throttle
opening angle
P0120
Open fully4,500 - 5,000 mV
16Battery
voltageIgnition switch: “ON”System voltageProcedure
No. 2213A-82
18Cranking
signalIgnition switch: “ON”Engine: StoppedOFFProcedure
No.2213A-82
signal
(ignition
switch-ST)Engine: CrankingON
No.22
21Engine
coolant
temperature
Ignition switch: “ON”
or engine runningWhen engine coolant
temperature is - 20_C-20_CCode No.
P011513A-19
temperature
sensorWhen engine coolant
temperature is 0_C0_C
When engine coolant
temperature is 20_C20_C
When engine coolant
temperature is 40_C40_C
When engine coolant
temperature is 80_C80_C
22Crank
angle
sensorDEngine: Cranking
DTachometer:
ConnectedCompare the engine
speed readings on the
tachometer and the
MUT-II.Accord--
DEngine: Idle
operationWhen engine coolant
temperature is - 20_C1,300 - 1,500
r/min
When engine coolant
temperature is 0_C1,300 - 1,500
r/min
When engine coolant
temperature is 20_C1,300 - 1,500
r/min
When engine coolant
temperature is 40_C1,150 - 1,350
r/min
When engine coolant
temperature is 80_C600 - 900 r/min
24LVehicle
speed
sensorDrive at 40 km/hApproximately 40
km/hCode No.
P050013A-43

MPI -Troubleshooting13A-104
Item
No.Reference
page Inspection
procedure
No. Normal condition Inspection contents Inspection
item
25Barometric
pressure
Ignition switch: ONAltitude: 0 m101 kPaCode No.
P0105
13A-15
pressure
sensor
Altitude: 0 m95 kPa
P0105
Altitude: 0 m88 kPa
Altitude: 0 m81 kPa
27Power
steering
fluidEngine: Idle operationSteering wheel
stationaryOFFCode No.
P055113A-46
fluid
pressure
switchSteering wheel turningON
28A/C switchEngine: Idle operation
(When A/C switch isA/C switch: OFFOFFProcedure
No. 2613A-92
(WhenA/Cswitchis
ON, A/C compressor
should be operating.)A/C switch: ONON
No.26
34Air flow
sensorEngine: After
warm-upIdle operationONCode No.
P010013A-13
sensor
reset
signal
warm up
3,000 r/minOFF
P0100
37Volumetric
efficiency
DEngine coolant
temperature:
Idle operation15 - 35%--
efficiencytemperature:
85 - 95_C
DLightningand
2,500 r/min15 - 35%
DLightning and
accessories:
OFFExcessive
accellerationAccording to ac-
celeration, volu-
metric efficiency
is increased.
41Injectors*1Engine: CrankingWhen engine coolant
temperature is 0_C
(injection is carried out
for all cylinders simulta-
neously)25 - 37 ms--
When engine coolant
temperature is 20_C15 - 22 ms
When engine coolant
temperature is 80_C4.2 - 6.3 ms
Injectors*2DEngine coolant
temperature:
80–95_C
Engine: Idle operation1.5 - 2.7 ms--
80–95_C
DLamps, electric
cooling fan and
allaccessories:
2,500 r/min1.2 - 2.4 ms
allaccessories:
OFF
DTransmission:
Neutral
When engine is sud-
denly racedIncreases

MPI -Troubleshooting13A-105
Item
No.Reference
page Inspection
procedure
No. Normal condition Inspection contents Inspection
item
44Ignition ad-
vanceDEngine: After
having warmed
up
DTiming lamp is
set(Thetiming
Engine: Idle operation0-13_BTDC--
set.(Thetiming
lamp is set in
order to check
actual ignition
timing.)
2,500 r/min20 - 40_BTDC
45Idle speed
control
(stepper)
motor
position*
3
DEngine coolant
temperature:
80 - 90_C
DLamps, electric
cooling fan and
all accessories:
OFF
DTransmission:
A/C switch: OFF2 - 25 STEP--
DTransmission:
Neutral
DEngine: Idle
operation
DWhen A/C switch
is ON, A/C
compressor
should be operat-
ing
A/C switch: OFF→ONIncreases by 10 -
70 steps
49A/C relayEngine: After having
warmed up/Engine is
idlingA/C switch: OFFOFF (Compressor
clutch is not oper-
ating)Procedure
No. 2713A-92
A/C switch: ONON (Compressor
clutch is operat-
ing)
59Oxygen
sensor
(rear)Engine: After having
warmed-upWhen engine is sud-
denly raced0 and 600 - 1,000
mV alternate.Code No.
P013613A-27
81LLearned
valueEngine: After having warmed up, running with no
load at 2,500 r/min. (During air/fuel ratio
feedback control)- 12.5 - 12.5%--
82LFeedbackEngine: After having warmed up, running with no
load at 2,500 r/min. (During air/fuel ratio
feedback control)- 20 - 20%--
87LEngine
load
Engine: After having
warmedup
Idle operation15 - 35%--
loadwarmedup
2,500 r/min15 - 35%--

MPI -Troubleshooting13A-110
Terminal No.Normal condition Check condition (Engine condition) Check item
12Power supplyIgnition switch: “ON”System voltage
25
19Air flow sensor reset
signal
Engine: Idle operation0-1V
signal
Engine speed: 3,000 r/min6-9V
21Fan controllerRadiator fan is not operating0 - 0.3 V
Radiator fan is operating0.7 V or more
22Fuel pump relay 2Ignition switch: “ON”System voltage
Engine: Idle operation1 V or less
24A/C load signalDEngine:
Idle operation
DA/C switch: ON
(A/C compressor
runs)DOutdoor air
sensor ambient
temperature:
18_C or more
DA/C setting
temperature:
Minimum
temperature
DA/C air volume:
Maximum1 V or less
DA/C setting
temperature:
indoor
temperature
DA/C air volume:
MinimumSystem voltage
32Condenser fan motor
relay (HI)Fan inactive state
(Engine coolant temperature: 90_C or less)System voltage
Fan high-speed rotation state
(Engine coolant temperature: 105_C or more)1 V or less
33Alternator G terminalDEngine: After warm-up, idle operation
DRadiator fan: Not operating
DHeadlamp: OFF→ON
DStop lamp: OFF→ON
DRear defogger switch: OFF→ONVoltage increases by
0.2 - 3.5 V
34Condenser fan motor
relay (LOW)Fan inactive state
(Engine coolant temperature: 90_C or less)System voltage
Fan low-speed rotation state (Engine coolant
temperature: 95 - 100_C or more)1 V or less
35Intercooler water
spraylamp
Ignition switch: “ON”System voltage
spraylamp
Ignition switch: “LOCK” (OFF)1 V or less
36Engine warning lampIgnition switch: “LOCK” (OFF)→“ON”1 V or less→System
voltage (After several se-
conds have elapsed)

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-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-121
IDLE SPEED CONTROL SERVO (STEPPER MOTOR)
Measurement Method
1. Disconnect the idle speed control servo connector, and
connect the special tool (test harness: MB991709) in
between.
2. Connect the analyzer special patterns pickup to the idle
speed control servo-side connector terminal No. 1,
terminal No. 3, terminal No. 4 and terminal No. 6
respectively.
Alternate Method (Test harness not available)
1. Connect the analyzer special patterns pickup to
engine-ECU terminal No. 4, connection terminal No. 5,
connection terminal No. 17, and connection terminal No.
18 respectively.
Standard Wave Pattern
Observation conditions
FunctionSpecial patterns
Pattern heightHigh
Pattern selectorDisplay
Engine conditionWhen the engine coolant temperature is 20_C or below, turn the ignition switch from “LOCK”
(OFF) position to “ON” position (without starting the engine).
While the engine is idling, turn the A/C switch to ON.
Immediately after starting the warm engine
Standard wave pattern
Stepper
motor
control
signal
wave
pattern(V)
30
20
10The wave pattern
appears for an
instant, but soon
disappears.Point B
Coil reverse electromotive
force (Approx. 3×10 V)Point A
Induced electromotive force
from the motor turning
Time
Special
patterns
pickupAnalyzer

MPI -On-vehicle Service13A-131
COMPONENT LOCATION
NameSymbolNameSymbol
A/C relayJFuel pump relay 1, 2Q
A/C switchTFuel pump relay 3H
Air flow sensor (integrated intake air tempera-
ture sensor and barometric pressure sensor)OFuel pump resistorH
Camshaft position sensorNIdle speed control servo (stepper motor)G
Crank angle sensorKIgnition coil (integrated power transister)M
Detonation sensorEInjectorC
Diagnosis connectorSOxygen sensor (front)L
EGR control solenoid valveDOxygen sensor (rear)X
Engine control relayIPower steering fluid pressure switchA
Engine coolant temperature sensorNResistor (for injector)H
Engine warning lamp (check engine lamp)RSecondary air control solenoid valveD
Engine-ECUUThrottle position sensorG
Fan motor relayJVehicle speed sensorF
Fuel pressure control solenoid valveBWaste gate solenoid valveP
ABCDEFGHIJK
LMNOP
QRSTU

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