Mitsubishi Outlander XL. Manual — part 469
PURGE CONTROL SYSTEM CHECK (PURGE
FLOW CHECK)
M11703000014USA0000010000
ZK6000369
Throttle body
Intake manifold
From
aircleaner
To combustion
chamber
AA00
OFF
ON
Evaporative emission
purge solenoid
(ON: Open)
Purge flow
indicator
(MB995061)
Purge hose
Evaporative
emission canister
Required Special Tool:
MB995061: Purge Flow Indicator
1.
Disconnect the purge hose from the evaporative emission
(EVAP) purge solenoid, and connect special tool MB995061
between the EVAP purge solenoid and the purge hose.
2.
Before inspection, set the vehicle in the following conditions:
⦆
Engine coolant temperature: 80 - 95°C (176 - 203°F)
⦆
Lights, electric cooling fan and accessories: OFF
⦆
Transaxle: Neutral (P range on vehicles with A/T)
NOTE:
Vehicles for Canada, the headlight, taillight,
etc. remain lit even when the lighting switch is in "OFF"
position but this is no problem for checks.
3.
Run the engine at idle for more than four minutes.
EMISSION CONTROL <MFI>
17c-11
EVAPORATIVE EMISSION CONTROL SYSTEM
4.
Check the purge flow volume when engine is revved suddenly
several times.
Standard value: Momentarily 20 cm3/s (2.5 SCFH) or
more.
5.
If the purge flow volume is less than the standard value, check
it again with the vacuum hose disconnected from the EVAP
canister. If the purge flow volume is less than the standard
value, check the vacuum port and the vacuum hose for
clogging. Also check the EVAP purge solenoid. If the purge
flow volume is at the standard value, replace the EVAP
canister.
EVAPORATIVE EMISSION PURGE SOLENOID
CHECK
M11703000017USA0000010000
1.
Disconnect the vacuum hose (black, black with red paint mark)
from the evaporative emission (EVAP) purge solenoid.
NOTE:
When disconnecting the vacuum hose, always place
an identification mark so that it can be reconnected at
its original position.
2.
Disconnect the harness connector.
ZK600381AA00
A
B
3.
Connect a hand vacuum pump to nipple (A) of the EVAP purge
solenoid (refer to the illustration at left).
4.
As described in the chart below, check airtightness by
applying a vacuum with voltage applied directly from the
battery to the EVAP purge solenoid valve and without applying
voltage.
BATTERY
POSITIVE
VOLTAGE
NORMAL CONDITION
Applied
Vacuum leaks
Not applied
Vacuum maintained
ZK600383AA00
5.
Measure the resistance between the terminals of the EVAP
purge solenoid.
Standard value: 22 - 26 ohms [at 20°C (68°F)]
6.
Replace the solenoid if resistance is out of specification.
MASS AIRFLOW SENSOR CHECK
M11703000504USA0000010000
To inspect these parts, refer to GROUP 13A, Multiport Fuel
Injection (MFI) - Multiport Fuel Injection (MFI) Diagnosis -
Diagnostic Trouble Code Chart P.13Ab-44.
17c-12
EMISSION CONTROL <MFI>
EVAPORATIVE EMISSION CONTROL SYSTEM
BAROMETRIC PRESSURE SENSOR CHECK
M11703000080USA0000010000
To inspect the sensor, refer to GROUP 13A, Multiport Fuel
Injection (MFI) - Multiport Fuel Injection (MFI) Diagnosis -
Diagnostic Trouble Code Chart P.13Ab-44.
ENGINE COOLANT TEMPERATURE SENSOR
CHECK
M11703000081USA0000010000
To inspect the sensor, refer to GROUP 13A, Multiport Fuel
Injection (MFI) - Multiport Fuel Injection (MFI) Diagnosis -
Diagnostic Trouble Code Chart P.13Ab-44.
INTAKE AIR TEMPERATURE SENSOR CHECK
M11703000082USA0000010000
To inspect the sensor, refer to GROUP 13A, Multiport Fuel
Injection (MFI) - Multiport Fuel Injection (MFI) Diagnosis -
Diagnostic Trouble Code Chart P.13Ab-44.
FUEL TANK DIFFERENTIAL PRESSURE SENSOR
CHECK
M11703000077USA0000010000
To inspect the sensor, refer to GROUP 13B, Fuel Supply - Fuel
Tank - Fuel Tank Inspection - Fuel Tank Differential Pressure
Sensor Check P.13B-25.
EVAPORATIVE EMISSION VENTILATION
SOLENOID CHECK
M11703000078USA0000010000
Refer to Emission Control - Evaporative Emission Canister and
Fuel Tank Pressure Relief Valve - Inspection - Evaporative
Emission Ventilation Solenoid Check P.17c-19.
EXHAUST GAS RECIRCULATION (EGR) SYSTEM
GENERAL INFORMATION (EXHAUST GAS RECIRCULATION SYSTEM)
M11703000052USA0000010000
The exhaust gas recirculation system (EGR) lowers
the nitrogen oxides (NOx) emission level. When the
air/fuel mixture combustion temperature is high, a
large quantity of NOx is generated in the combustion
chamber. Therefore, this system recirculates part of
exhaust gas from the 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 (Stepper
Motor) for driveability quality.
OPERATION
When the engine coolant temperature is low, when
the engine is at idle or when a wide open throttle
operation is performed, the EGR valve (Stepper
Motor) is kept closed, achieving no EGR. After
warming up the engine, the EGR valve (Stepper
Motor) can be opened by the engine control module
(ECM).
EMISSION CONTROL <MFI>
17c-13
EVAPORATIVE EMISSION CONTROL SYSTEM
The ECM monitors the EGR system and illuminates
the Malfunction Indicator Lamp (SERVICE ENGINE
SOON or Check Engine Lamp) to indicate that there
is a malfunction.
SYSTEM DIAGRAM
ZK602754
ECM
Mass airflow sensor
Intake air temperature
sensor
Engine coolant
temperature sensor
Throttle position sensor
Crankshaft position sensor
Manifold absolute
pressure sensor
Battery
AA00
EGR valve
(stepper moter)
COMPONENT LOCATION
M11703000076USA0000010000
ZK600384
Exhaust gas recirculation valve
AA00
EGR VALVE (STEPPER MOTOR) CHECK
M11703000502USA0000010000
Required Special Tool:
MB991658: Test Harness Set
Checking the Operation Sound
1.
Check that the operation sound of the stepper motor can be
heard from the EGR valve when the ignition switch is turned
ON (without starting the engine).
2.
If the operation sound cannot be heard, inspect the drive
circuit of the stepper motor.
17c-14
EMISSION CONTROL <MFI>
EXHAUST GAS RECIRCULATION (EGR) SYSTEM
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