Mitsubishi Galant 9G. Manual — part 468

EMISSION CONTROL

TSB Revision

ENGINE AND EMISSION CONTROL

17-90

<3.8L ENGINE>

COMPONENT LOCATION

M1173007600213

EGR VALVE (STEPPER MOTOR) CHECK

M1173050200123

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.

NOTE: If the operation sound is not heard, and the circuit is
normal, either the stepper motor or the PCM may have failed.

.

AK203696 AC

MASS AIRFLOW
SENSOR

ENGINE COOLANT
TEMPERATURE SENSOR

CRANKSHAFT POSITION
SENSOR

PCM

MFI RELAY

BATTERY

EGR VALVE
(STEPPER MOTOR)

AK303007AB

EGR VALVE
<2.4L ENGINE>

AK303008

BRAKE FLUID
RESERVOIR

EGR VALVE
<3.8L ENGINE>

AB

EMISSION CONTROL

TSB Revision

ENGINE AND EMISSION CONTROL

17-91

Checking the Coil Resistance

1. Remove the EGR valve.
2. Measure the resistance between terminal No. 2 and either

terminal No. 1 or terminal No. 3 of the connector at the EGR
valve.

Standard value: 20

− 24 Ω [at 20°C (68°F)]

3. If the resistance is not within the standard, replace the EGR

valve.

4. Measure the resistance between terminal No. 5 and either

terminal No. 6 or terminal No. 4 of the connector at the EGR
valve.

Standard value: 20

− 24 Ω [at 20°C (68°F)]

5. If the resistance is not within the standard, replace the EGR

valve.

.

Operation Check

1. Remove the EGR valve.
2. Connect special tool MB991658 to the EGR valve.

3. Connect the positive (+) terminal the battery to terminal No.

2.

CAUTION

Connecting battery voltage to the EGR valve for a long
term could damage the coil.
4. Connect terminals 1 and 3 to the negative (-) terminal of the

battery, in order to test whether the stepper motor vibrates
(with a slight shudder), indicating that the stepper motor is
operating.

5. Connect the positive (+) terminal the battery to terminal No.

5.

CAUTION

Connecting battery voltage to the EGR valve for a long
term could damage the coil.
6. Connect terminals 4 and 6 to the negative (-) terminal of the

battery, in order to test whether the stepper motor vibrates
(with a slight shudder), indicating that the stepper motor is
operating.

7. If vibrations can be felt as a result of the test, the stepper

motor is determined to be normal.

AK100014

1 2 3
4 5 6

1 2 3
4 5 6

AK202365

1 2 3
4 5 6

AC

EGR VALVE

AK202366

MB991568

BATTERY

AC

EMISSION CONTROL

TSB Revision

ENGINE AND EMISSION CONTROL

17-92

EGR VALVE (STEPPER MOTOR) CLEANING

M1173050300012

NOTE: DO not use solvents or other cleaning agents, which will
enter the motor and cause a malfunction.
Remove the EGR valve and make sure that it is not stuck and
does not have any carbon deposits. If there are any carbon
deposits, use a wire brush to clean it.

MASS AIRFLOW SENSOR CHECK

M1173050400064

<2.4L ENGINE>

To inspect these parts, refer to GROUP 13A, Multiport Fuel
Injection (MFI) <2.4L Engine>

− Multiport Fuel Injection (MFI)

Diagnosis

− Diagnostic Trouble Code Chart

P.13A-33

.

<3.8L ENGINE>

To inspect these parts, refer to GROUP 13B, Multiport Fuel
Injection (MFI) <3.8L Engine>

− Multiport Fuel Injection (MFI)

Diagnosis

− Diagnostic Trouble Code Chart

P.13B-34

.

ENGINE COOLANT TEMPERATURE SENSOR
CHECK

M1173008100534

<2.4L ENGINE>

To inspect the sensor, refer to GROUP 13A, Multiport Fuel
Injection (MFI) <2.4L Engine>

− Multiport Fuel Injection (MFI)

Diagnosis

− Diagnostic Trouble Code Chart

P.13A-33

.

<3.8L ENGINE>

To inspect the sensor, refer to GROUP 13B, Multiport Fuel
Injection (MFI) <3.8L Engine>

− Multiport Fuel Injection (MFI)

Diagnosis

− Diagnostic Trouble Code Chart

P.13B-34

.

CRANKSHAFT POSITION SENSOR CHECK

M1173008300271

<2.4L ENGINE>

To inspect the sensor, refer to GROUP 13A, Multiport Fuel
Injection (MFI) <2.4L Engine>

− Multiport Fuel Injection (MFI)

Diagnosis

− Diagnostic Trouble Code Chart

P.13A-33

.

<3.8L ENGINE>

To inspect the sensor, refer to GROUP 13B, Multiport Fuel
Injection (MFI) <3.8L Engine>

− Multiport Fuel Injection (MFI)

Diagnosis

− Diagnostic Trouble Code Chart

P.13B-34

.

EMISSION CONTROL

TSB Revision

ENGINE AND EMISSION CONTROL

17-93

REMOVAL AND INSTALLATION <2.4L ENGINE>

M1173010500216

INSTAIIATION SERVICE POINT

.

>>A<< EGR VALVE GASKET INSTALLATION

Install the EGR valve gasket as shown in the illustration.

Pre-removal and Post-installation Operation
Air Cleaner Cover, Air Intake Hose and Resonator Removal
and Installation (Refer to GROUP 15, Air Cleaner

P.15-4

).

AC307977AB

1

N

3

2

24 ± 3 N·m
18 ± 2 ft-lb

4

5

6

7

8

9

10

11

5.0 ± 1.0 N·m
44 ± 9 in-lb

REMOVAL STEPS

1.

THROTTLE BODY ASSEMBLY
CONNECTOR

2.

MANIFOLD ABSOLUTE
PRESSURE SENSOR
CONNECTOR

3.

EVAPORATIVE EMISSION
PURGE SOLENOID CONNECTOR

4.

KNOCK SENSOR CONNECTOR

5.

POWER STEERING PRESSURE
SWITCH CONNECTOR

6.

INJECTOR CONNECTOR

7.

IGNITION COIL CONNECTOR

8.

GROUNDING

9.

EGR VALVE CONNECTOR

10. EGR VALVE

>>A<<

11. EGR VALVE GASKET

REMOVAL STEPS (Continued)

AC302358AC

GASKET

NOTCHED
PART

NOTCHED
PART