coolant temperature MITSUBISHI LANCER EVOLUTION 2007 Service Manual PDF

ENGINE AND EMISSION CONTROL -Emission Control System17-11
PURGE CONTROL SYSTEM CHECK
1. Disconnect the vacuum hose (red stripe) from throttle
body and connect it to a hand vacuum pump.
2. Plug the nipple from which the vacuum hose was removed.
3. When the engine is cold or hot, apply a vacuum of 53
kPa, and check the condition of the vacuum.
When engine is cold
(Engine coolant temperature: 40_C or less)
Engine conditionNormal condition
At idleVacuum is maintained
3,000 r/min
When engine is hot
(Engine coolant temperature: 80_C or higher)
Engine conditionNormal condition
At idleVacuum is maintained
3,000 r/min (within 3
minutes after engine starts)Vacuum will leak.
PURGE PORT VACUUM CHECK
1. Disconnect the vacuum hose (red stripe) from the throttle
body purge vacuum nipple and connect a hand vacuum
pump to the nipple.
2. Confirm that the vacuum is approximately constant
regardless of the engine rotation speed.
NOTE
If vacuum changes, it is possible that the throttle body
purge port maybe clogged and require cleaning.
Red stripe
Plug
Throttle body
Red stripe
Throttle body
Vac-
uum
Engine speed (r/min)

ENGINE AND EMISSION CONTROL -Emission Control System17-13
EXHAUST GAS RECIRCULATION (EGR) SYSTEM
GENERAL INFORMATION
The exhaust gas recirculation (EGR) system lowers
the nitrogen oxide (NOx) emission level. When the
air/fuel mixture combustion temperature is high,
a large quantity of nitrogen oxides (NOx) is
generated in the combustion chamber. Therefore,
this system recirculates part of emission gas fromthe exhaust port of the cylinder head to the
combustion chamber through the intake manifold
to decrease the air/fuel mixture combustion
temperature, resulting in reduction of NOx.
The EGR flow rate is controlled by the EGR valve
so as not to decrease the driveability.
OPERATION
The EGR valve is being closed and does not
recirculate exhaust gases under one of the following
conditions. Otherwise, the EGR valve is opened
and recirculates exhaust gases.DThe engine coolant temperature is low.
DThe engine is at idle.
DThe throttle valve is widely opened.
SYSTEM DIAGRAM
ON Throttle body
EGR control
solenoid valve
Engine
control
relay
Battery EGR valve
Crank angle sensor
Throttle position sensor Engine-ECU
Engine coolant
temperature sensor Air flow sensor

ENGINE AND EMISSION CONTROL -Emission Control System
EGR control solenoid valve
Vacuum tank
Alternator
EGR valve
Throttle body
17-14
COMPONENT LOCATION
EXHAUST GAS RECIRCULATION (EGR)
CONTROL SYSTEM CHECK
1. Disconnect the vacuum hose (green stripe) from the EGR
control solenoid valve, and then connect a hand vacuum
pump via the three-way terminal.
2. When the engine is hot or cold, check the condition of
vacuum by racing the engine.
When engine is cold
(Engine coolant temperature: 20_C or less)
Throttle valveNormal vacuum condition
Open quicklyNo vacuum will generate
(the same as barometric pressure.)
When engine is hot
(Engine coolant temperature: 80_C or higher)
Throttle valveNormal vacuum condition
Open quicklyIt will momentarily rise over 13 kPa
3. Disconnect the three-way terminal.
4. Connect the hand vacuum pump to the vacuum hose
(green stripe).
5. Check whether the engine stalls or the idling is unstable
when a vacuum of 27 kPa or higher is applied during
idling.
Three-way
terminal
EGR control
solenoid valveVacuum
tankAlternator
EGR control
solenoid valveVacuum
tank
Alternator
Green stripe

54A-2
CHASSIS
ELECTRICAL
CONTENTS
BATTERY 4..............................
SERVICE SPECIFICATION 4....................
ON-VEHICLE SERVICE 4......................
Fluid Level and Specific Gravity Check 4........
Charging 4.................................
Battery Testing Procedure 5...................
IGNITION SWITCH AND IMMOBILIZER
SYSTEM 6...............................
SPECIAL TOOLS 6............................
TROUBLESHOOTING 6........................
IMMOBILIZER-ECU CHECK 10.................
IGNITION SWITCH 11..........................
COMBINATION METER 14................
SERVICE SPECIFICATIONS 14.................
SEALANT 14..................................
SPECIAL TOOLS 15...........................
TROUBLESHOOTING 15.......................
ON-VEHICLE SERVICE 19.....................Speedometer Check 19......................
Tachometer Check 20........................
Fuel Gauge Unit Check 20....................
Engine Coolant Temperature Gauge
Unit Check 21...............................
COMBINATION METER 22.....................
HEADLAMP ASSEMBLY 24...............
SERVICE SPECIFICATIONS 24.................
TROUBLESHOOTING 24.......................
ON-VEHICLE SERVICE 24.....................
Headlamp Aiming 24.........................
Headlamp Intensity Measurement 28...........
Headlamp Bulb(low beam)Replacement28 ....
Headlamp Bulb(high beam)Replacement29 ...
Position Lamp Bulb Replacement29 ...........
Front Turn Signal Lamp Bulb Replacement29 ...
Headlamp Auto Cut Adjustment Procedure29 ...
HeadlampAuto Cut Function Check 29.........
HEADLAMP ASSEMBLY 30....................
CONTINUED ON NEXT PAGE

CHASSIS ELECTRICAL -Combination Meter54A-21
FLOAT HEIGHT OF FUEL GAUGE UNIT
When float is moved to contact float arm on stopper,
ensure that Position F (A) and E (B) are within standard
value.
Standard Value:
FloatPositionMainfuelgaugeunitSubfuelgaugeunitFloatPositionMainfuelgaugeunitSubfuelgaugeunit
Position F (A)33.3 mm10.7 mm
Position E (B)121.9 mm138.6 mm
ENGINE COOLANT TEMPERATURE GAUGE
UNIT CHECK
1. Drain coolant. (Refer to GROUP 14 - On-vehicle Service)
2. Remove water temperature gauge unit.
3. Put water temperature gauge unit into the hot water in
specified temperature, and ensure that basic resistance
is within standard value.
Standard value: 70_C 104±13.5Ω
Reference value:
TemperatureResistanceΩ
50_C230
60_C155
80_C73
4. After inspection, apply specified sealant at threads of
water temperature gauge unit, and tighten to the specified
torque.
Semi-drying sealant: 3M ATD Part No.1215 or
equivalent
5. Refill coolant. (Refer to GROUP 14 - On-vehicle Service.)
Main fuel gauge unit
Sub fuel gauge unit
A
B
A
B
ThermometerCircuit tester
11±1 N·m

HEATER, AIR CONDITIONER AND VENTILATION-TroubleshootingHEATER, AIR CONDITIONER AND VENTILATION-Troubleshooting55-12
CHECK AT THE ENGINE-ECU TERMINAL
Terminal no.Check itemCheck whenNormal state
21Fan controller outputRadiator fan: ON0 - 0.3 Vp
Radiator fan: OFF0.7 V or more
22A/C compressor outputA/C compressor relay: OFF0Vpp
A/C compressor relay: ONBattery voltage
or temporarily
6V or more→
1V or less
24A/C-ECU input (A/C2)At A/C low loadBattery voltage
32Condenser fan motor relay (HI)Fan: OFF(engine coolant temperature:90_C
or lower)Battery voltage
Fan: ON(engine coolant tempera-
ture:105_C or lower)1V or more
34Condenser fan motor relay (LOW)Fan: OFF(engine coolant temperature:90_C
or lower)Battery voltage
Fan: ON(engine coolant tempera-
ture:105_C or lower)1V or more
45A/C-ECU input (A/C1)A/C ON (When dual pressure switch is ON)Battery voltage
CHECK AT THE A/C-ECU TERMINAL
Termi-
nal no.Check itemCheck whenNormal state
1Rear defogger switchDefogger switch: ON0Vgg
Defogger switch: OFFBattery voltage
2Inside/outside air changeover
dt(tidi)
When damper moved to inside circulation position0Vg
damper motor (outside air)When damper moved to outside air induction
positionBattery voltage
3Inside/outside air changeover
dt(i idi)
When damper moved to inside circulation positionBattery voltageg
damper motor (inside air)When damper moved to outside air induction
position0V
4Engine-ECU output (A/C1)When A/C OFF0Vgp()
A/C switch: ON, blower: ON (room temperature)Battery voltage
5Engine-ECU output (A/C2)At A/C low loadBattery voltagegp()
At A/C high load0V
6Illumination power supplyLighting switches: ONBattery voltage
7---
8Blower switch (LO)Blower switch: LOBattery voltage

HEATER, AIR CONDITIONER AND VENTILATION–On-vehicle Service55-24
IDLE-UP OPERATION CHECK
1. Set the vehicle in the pre-inspection condition:
Engine coolant temperature: 80 – 90_C
Lamps, electric cooling fan and all accessories: OFF
2. Check that the idle speed is within the standard value.
Standard value: 850±50 r/min
NOTE
The idle speed is controlled by the ISC system and should
not be adjusted.
3. The idle speed should be within the standard value when
the A/C switch is turned on and the A/C is operating.
Standard value:
850±50 r/min