1989 MITSUBISHI GALANT engine coolant

EMISSION CONTROL
SYSTEMS
CONTENTSr.w?API-
CATALYTIC CONVERTER.....................29
EVAPORATIVE EMISSION CONTROL
SYSTEM..........................................15
Air Conditioning Switch........................21
Component Location...........................15
Evaporative Emission Canister................21
Evaporative Emission Purge Solenoid.......21
Fuel Tank Filler Tube Cap Inspection........21
Fuel Tank Pressure Control Valve............21
Purge Control System Inspection
.................................17
Purge Control System Inspection
>
.......................................
18
Purge Control Valve
..............20
Purge Port Vacuum............................19
Volume Air Flow Sensor, Engine Coolant
Temperature Sensor and Intake Air
Temperature Sensor
...........................21
EXHAUST GAS RECIRCULATION (EGR)
SYSTEM..........................................22
Component Location...........................22
EGR Solenoid ..................28
EGR System Inspection
......25
EGR System Inspection ........25
EGR Temperature Sensor ...28
EGR Valve
......................................27
EGR Valve Control Vacuum..................26
Thermal Vacuum Valve ........27
MIXTURE CONTROL (MFI) SYSTEM. . . . . . . . 29
POSITIVE CRANKCASE VENTILATION
SYSTEM..........................................13
Component Location..........................13
Crankcase Ventilation System Inspection
...14
Positive Crankcase Ventilation (PCV)
Valve Inspection
...............................14
SPECIFICATIONS..................................2
General Specifications...........................2
Sealant............................................2
Service Specifications...........................2
Torque Specifications...........................2
TROUBLESHOOTING.............................3
VACUUM HOSES.................................4
Vacuum Circuit Diagram........................9
Vacuum Hoses Routing.........................4

EMISSION CONTROL SYSTEMS -Evaporative Emission Control System17-17
‘URGE CONTROL SYSTEM INSPECTION
I
Throttle body
M17lBBF
Engine
control
module
Intake air temperature

(1999
models)>
6EM153
(1) Disconnect the vacuum hose (red stripes) from the throttle
body and connect it to a hand vacuum pump.
(2) Plug the nipple from which the vacuum hose was removed.
(3) Under the engine conditions described below, provide a
vacuum by using the hand vacuum pump, and then check.
When engine is cold-coolant temperature:
60°C (140°F) or less
~1
When engine is hot-coolant temperature:
70°C (158°F) or hiaher, -- ---~“----
Engine operatingApplying vacuumResultcondition
Idling375 mmHg(14 in.Hg.)Vacuum is maintained
Within 3 minutes Try applyingafter engine startvacuum3,000 rpm
Vacuum leaks
After 3 minutes 375 mmHghave passed after (14 in.Hg.)engine start
3,000 rpm
Vacuum will be main-tained momentarily,after which it willleaks.
NOTE:
The vacuum will leakcontinuously if thealtitude is 2,200 m(7,200 ft.) or higher,
or the intake air
temperature is
50°C(122°F) or higher.
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EMISSION CONTROL SYSTEMS -Evaporative Emission Control System
PURGE CONTROL SYSTEM INSPECTION M17lBBL
Evaporative
emission canister
Intake air temperature sensorEngine coolant temperature sensor re
Engine control module
I(1)Disconnect the purge air hose from the air intake hose, and
plug the air intake hose. Then, connect the hand vacuum
pump to the purge air hose.
(2) Under the engine conditions shown below, check by
applying vacuum from a hand vacuum pump.
When engine is cold-coolant temperature:
60°C (140°F) or less
Engine operating Applying vacuumResultcondition
1 vacuum is maintained 1ldldl rpm1 gy?r$y)
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EMISSION CONTROL SYSTEMS -Evaporative Emission Control System17-19
When engine is hot-coolant temperature:
70% (158°F) or higher
Engine operating
condition Applying vacuumResult
Idling
Vacuum is maintained
3,000 rpm withinTry applyingthree minutes after vacuumstarting engine
Vacuum leaks
3,000 rpm after
three minutes
have elapsedafter startingengine
375 mmHg(14.8 in.Hg.1Vacuum will be main-tained momentarily,after which it willleaks.
NOTE
The vacuum will leak
continuously if the
altitude is 2,200
m(7,200 ft.) or higher,
or the intake air
temperature is
50°C(122°F) or higher.
PURGE PORT VACUUM MITFVBC
INSPECTION Non-
Turbo-Up to 1991 models, DOHC Turbo> Engine coolant temperature:
85- 95°C (185- 205°F)
(1) Disconnect the vacuum hose from the throttle body purge hose nipple and connect a hand vacuum pump to the
nipple.
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17-20EMISSION CONTROL SYSTEMS -Evaporative Emission Control System
Engine speed (rpm)>
3FU262
E2id>
‘_/- )Engine
speed
(rpm)1 FU446
1 TSB Revision
(2) Start the engine and check to see that, after raising the
engine speed by racing the engine, vacuum remains fairly
constant.
NOTE
If there is no vacuum created, it is possible that the throttle
body port may be clogged and require cleaning.
INSPECTION i993 models, DOHC Non-
Turbo From 1992 models>
Engine coolant temperature: 85- 95°C (185- 205°F)
(1) Disconnect the vacuum hose from the throttle body purge
hose nipple and connect a hand vacuum pump to the
nipple.
(2) Start the engine and check to see that, after raising the engine speed by racing the engine, vacuum raises pro-
portionately with the rise in engine speed.
NOTE
If there IS a problem with the change in vacuum, ‘it is
possible that the throttle body port may be clogged and
require cleaning.
PURGE CONTROL VALVE
INSPECTION
Ml7B.X
(1) Remove the purge control valve.
(2) Connect a hand vacuum pump to the vacuum nipple of the
purge control valve.
(3) Apply a vacuum of 400 mmHg (15.7 in.Hg.) and check
airtightness.
(4) Blow in air lightly from the evaporative emission Canister
side nipple and check conditions as follows.
(5) Connect a hand vacuum pump to the positive pressure
nipple of the purge control valve.
(6) Apply a vacuum of 400
mmHg (15.7 in.Hg.) and check
air-tightness.
I

EMISSION CONTROL SYSTEMS -Evaporative Emission Control System17-21EC1510
6EM137
EVAPORATIVE EMlS$lON
PURGE SOLENOID
INSPECTIONM17lBFD
NOTE
When disconnecting the vacuum hose, make an identification
mark on it so that it can be reconnected to the original posi-
tion.
(1) Disconnect the vacuum hoses (non stripe and red stripe
hoses) from the solenoid valve
(2) Disconnect the harness connector from solenoid valve.
(3) Connect a hand vacuum pump to the nipple to which the red-striped vacuum hose was connected.
(4) Apply a vacuum and check for air-tightness when voltage applied directly to the evaporative emission purge solenoid
when the voltage is discontinued.
Battery voltageResult
Non-Turbo When appliedVacuum leaks
When discontinued Vacuum is maintained
TurboWhen appliedVacuum is maintained
When discontinued Vacuum leaks
(5) Measure the resistance between the terminals of the sole-
noid valve.
Standard value: 36-44 Q [at 20°C (68”F)l
VOLUME AIR FLOW SENSOR, ENGINE
COOLANT TEMPERATURE SENSOR AND
INTAKE AIR TEMPERATURE SENSOR
M17IBGB
To inspect these parts, refer to GROUP 13-On-Vehicle Inspec-
tion of
MFI Components.
AIR CONDITIONING SWITCH Ml7IBHB
To inspect the air conditioning switch, refer to GROUP
55-Air
Conditioning Switch.
FUEL TANK PRESSURE CONTROL VALVE MI’IIBEB
To inspect the fuel tank pressure control valve, refer to GROUP
13-Fuel
Tank.
EVAPORATIVE EMISSION CANISTERM17lBlB
To inspect the evaporative emission canister, refer to GROUP
13-Fuel Line and Vapor Line.
FUEL TANK FILLER TUBE CAP INSPECTIONM,7,w~
Check the gasket of the fuel tank filler tube cap, and the filler
cap itself, for damage or deformation; replace the
cap if neces-
sary.
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EMISSION CONTROL SYSTEMS -Exhaust Gas Recirculation (EGR) System17-25
1
.

EGR SYSTEM INSPECTION Ml7ICJF
(1) Disconnect the vacuum hose (green stripe) from the throttle body, and connect a hand vacuum pump to the
vacuum hose.
(2) Under the engine conditions described below, provide a
vacuum by using the hand vacuum pump, and then check.
WhenEngine is Cold-
coolant temperature 50°C (122°F) or below
Engine operatingconditionApplying vacuumResul
t
IdlingTry applying vacuum Vacuum leaks
When Engine is Hot-
coolant temperature 85”-95°C (185”-205°F) or higher
Engine operatingconditionApplying vacuumResult
Idling45 mmHg(1.7 in.Hg.1Vacuum is maintained
Changes from
idling to slightlyunstable
Vacuum is maintained
EGR SYSTEM INSPECTION
(1) Disconnect the vacuum hose (green striped hose) from the exhaust gas recirculation
(EGR) valve, and then connect a
manual vacuum pump via the three-way terminal.
(2) Check the following points when the engine is cold [enginecoolant temperature is
20°C (68°F) or below] and when the
engine is warm [engine coolant temperature is
70°C (158°F)
or higher].
116EMOZW
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17-26EMISSION CONTROL SYSTEMS- Exhaust Gas Recirculation (EGR) System

~

I6EM0224 1
(3) Disconnect the three-way terminal and connect the manual
vacuum pump directly to the exhaust gas recirculation
(EGR) valve.
(4) Check whether the engine stalls or the idling is unstable
when a vacuum of 155 mmHg (5.9 in.Hg) or higher is
applied during idling.
EGR VALVE CONTROL VACUUM
INSPECTION M17WBB
Engine coolant temperature: 85-95°C

(185-205°F)
(1) Disconnect the vacuum hose from the throttle body EGR
vacuum nipple and connect a hand vacuum pump to the
nipple.
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