Mitsubishi Galant. Manual — part 379

EMISSION CONTROL

TSB Revision

ENGINE AND EMISSION CONTROL

17-86

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 evaporative emission
purge solenoid. If the purge flow volume is at the standard
value, replace the EVAP canister.

EVAPORATIVE EMISSION PURGE SOLENOID
CHECK

M1173001700041

1. Remove the air intake hose <2.4L Engine>.

2. Disconnect the vacuum hose (black, black with red paint

mark) from the EVAP purge solenoid.

NOTE: When disconnecting the vacuum hose, always place
an identification mark so that it can be reconnected at its
original position.

3. Disconnect the harness connector.
4. Connect a hand vacuum pump to nipple (A) of the EVAP

purge solenoid (refer to the illustration at left).

5. Check airtightness by applying a vacuum with voltage

applied directly from the battery to the EVAP purge solenoid
valve and without applying voltage.

6. Measure the resistance between the terminals of the EVAP

purge solenoid.

Standard value: 30

−−−−

34

Ω

Ω

Ω

Ω

[at 20

°°°°

C (68

°°°°

F)]

7. Replace solenoid if resistance is out of specification.

CHAMBER CHECK

M1173008400030

Remove the vacuum hose and chamber assembly, and check
that the assembly is not clogged by blowing it.

VOLUME AIR FLOW SENSOR CHECK

M1173007900076

<2.4L ENGINE>

To inspect the sensor, refer to GROUP 13A (2.4L), Multiport
Fuel Injection (MFI) Diagnosis - Diagnostic Trouble Code Chart

P.13A-20

.

BATTERY POSITIVE VOLT-
AGE

NORMAL CONDITION

Applied

Vacuum leaks

Not applied

Vacuum maintained

AKX01308 AB

A

B

AKX01309

EMISSION CONTROL

TSB Revision

ENGINE AND EMISSION CONTROL

17-87

<3.0L ENGINE>

To inspect the sensor, refer to GROUP 13B (3.0L), Multiport
Fuel Injection (MFI) Diagnosis - Diagnostic Trouble Code Chart

P.13B-19

.

BAROMETRIC PRESSURE SENSOR CHECK

M1173008000043

<2.4L ENGINE>

To inspect the sensor, refer to GROUP 13A (2.4L), Multiport
Fuel Injection (MFI) Diagnosis - Diagnostic Trouble Code Chart

P.13A-20

.

<3.0L ENGINE>

To inspect the sensor, refer to GROUP 13B (3.0L), Multiport
Fuel Injection (MFI) Diagnosis - Diagnostic Trouble Code Chart

P.13B-19

.

ENGINE COOLANT TEMPERATURE SENSOR
CHECK

M1173008100073

<2.4L ENGINE>

To inspect the sensor, refer to GROUP 13A (2.4L), Multiport
Fuel Injection (MFI) Diagnosis - Diagnostic Trouble Code Chart

P.13A-20

.

<3.0L ENGINE>

To inspect the sensor, refer to GROUP 13B (3.0L), Multiport
Fuel Injection (MFI) Diagnosis - Diagnostic Trouble Code Chart

P.13B-19

.

INTAKE AIR TEMPERATURE SENSOR CHECK

M1173008200047

<2.4L ENGINE>

To inspect the sensor, refer to GROUP 13A (2.4L), Multiport
Fuel Injection (MFI) Diagnosis - Diagnostic Trouble Code Chart

P.13A-20

.

<3.0L ENGINE>

To inspect the sensor, refer to GROUP 13B (3.0L), Multiport
Fuel Injection (MFI) Diagnosis - Diagnostic Trouble Code Chart

P.13B-19

.

FUEL TANK DIFFERENTIAL PRESSURE SENSOR
CHECK

M1173007700050

To inspect the sensor, refer to GROUP 13C, Fuel Supply Fuel
Tank

−

Fuel Tank Differential Pressure Sensor Check

P.13C-

11

.

EMISSION CONTROL

TSB Revision

ENGINE AND EMISSION CONTROL

17-88

EVAPORATIVE EMISSION VENTILATION
SOLENOID CHECK

M1173007800057

Refer to Evaporative Emission Canister And Fuel Tank
Pressure Relief Valve

−

Fuel Tank Pressure Relief Valve

Inspection

P.17-96

.

EXHAUST GAS RECIRCULATION(EGR) SYSTEM

GENERAL INFORMATION

M1173005200059

The exhaust gas recirculation (EGR) system lowers
the oxides of nitrogen (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 so
as not to decrease the driveability.

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 is kept
closed, achieving no EGR.
After warming up of the engine, the EGR valve can
be opened by the engine control module.
The engine control module monitors the EGR system
and illuminates the check engine/malfunction
indicator lamp to indicate that there is a malfunction.

EMISSION CONTROL

TSB Revision

ENGINE AND EMISSION CONTROL

17-89

SYSTEM DIAGRAM

<2.4L ENGINE>

AKX01310

VACUUM CONTROL VALVE

ON

OFF

EGR
SOLENOID

MFI RELAY

BATTERY

PCM

VOLUME AIR FLOW
SENSOR

ENGINE COOLANT
TEMPERATURE SENSOR

CRANKSHAFT POSITION
SENSOR

EGR
VALVE

AC