Mitsubishi Galant 9G. Manual — part 1032

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>

13B-428

STEP 2. Using scan tool MB991958, check data list item 13:
Intake Air Temperature Sensor.
(1) Turn the ignition switch to the "ON" position.
(2) Set scan tool MB991958 to the data reading mode for item

13, Intake Air Temperature Sensor.

• The intake air temperature and temperature shown with

the scan tool should approximately match.

(3) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the sensor operating properly?

YES : Go to Step 3.
NO : Refer to DTC P0111

− Intake Air Temperature Circuit

Range/Performance Problem

P.13B-109

, DTC P0112

− Intake Air Temperature Circuit Low Input

P.13B-118

, DTC P0113

− Intake Air Temperature

Circuit High Input

P.13B-125

.

STEP 3. Using scan tool MB991958, check data list item 21:
Engine Coolant Temperature Sensor.
(1) Turn the ignition switch to the "ON" position.
(2) Set scan tool MB991958 to the data reading mode for item

21, Engine Coolant Temperature Sensor.

• The engine coolant temperature and temperature

shown with the scan tool should approximately match.

(3) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the sensor operating properly?

YES : Go to Step 4.
NO : Refer to DTC P0116

− Engine Coolant Temperature

Circuit Range/Performance Problem

P.13B-135

, DTC

P0117

− Engine Coolant Temperature Circuit Low

Input

P.13B-144

, DTC P0118

− Engine Coolant

Temperature Circuit High Input

P.13B-151

.

AC305412

AB

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827

AC305412

AB

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>

13B-429

STEP 4. Using scan tool MB991958, check data list item 25:
Barometric Pressure Sensor.
(1) Turn the ignition switch to the "ON" position.
(2) Set scan tool MB991958 to the data reading mode for item

25, Barometric Pressure Sensor.

• When altitude is 0 m (0 foot), 101 kPa (29.8 in.Hg).

• When altitude is 600 m (1,969 feet), 95 kPa (28.1 in.Hg).

• When altitude is 1,200 m (3,937 feet), 88 kPa (26.0

in.Hg).

• When altitude is 1,800 m (5,906 feet), 81 kPa (23.9

in.Hg).

(3) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the sensor operating properly?

YES : Go to Step 5.
NO : Refer to DTC P2228

− Barometric Pressure Circuit

Low Input

P.13B-992

, DTC P2229

− Barometric

Pressure Circuit High Input

P.13B-994

.

STEP 5. Using scan tool MB991958, check data list item 95:
Manifold Absolute Pressure Sensor.
(1) Connect scan tool MB991958 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Set scan tool MB991958 to the data reading mode for item

95, Manifold Absolute Pressure Sensor.

• When altitude is 0 m (0 foot), 101 kPa (29.8 in.Hg).

• When altitude is 600 m (1,969 feet), 95 kPa (28.1 in.Hg).

• When altitude is 1,200 m (3,937 feet), 88 kPa (26.0

in.Hg).

• When altitude is 1,800 m (5,906 feet), 81 kPa (23.9

in.Hg).

(4) Start the engine.

• When the engine is idling, 16 − 36 kPa (4.7 − 10.6

in.Hg).

• When the engine is suddenly revved, manifold absolute

pressure varies.

(5) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the sensor operating properly?

YES : Go to Step 6.
NO : Refer to DTC P0106

− Manifold Absolute Pressure

Circuit Range / Performance Problem

P.13B-74

, DTC

P0107

− Manifold Absolute Pressure Circuit Low

Input

P.13B-88

, DTC P0108

−Manifold Absolute

Pressure Circuit High Input

P.13B-100

.

AC305412

AB

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827

AC305412

AB

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>

13B-430

STEP 6. Check harness connector B-32 at intermediate
connector for damage.
Q: Is the harness connector in good condition?

YES : Go to Step 7.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection

P.00E-2

. Then go to Step 11.

STEP 7. Check the right bank injector resistance at
intermediate connector B-32.
(1) Disconnect the intermediate connector B-32.

(2) Measure the resistance between each male connector side

terminal.

a. Measure the resistance between terminal No. 5 and No.

9 at No. 1 cylinder injector.

b. Measure the resistance between terminal No. 9 and No.

10 at No. 3 cylinder injector.

c. Measure the resistance between terminal No. 4 and No.

9 at No. 5 cylinder injector.

• Resistance should be between 10.5 and 13.5 ohms

[at 20

°C (68°F)].

Q: Is the measured resistance between 10.5 and 13.5 ohms

[at 20

°C (68°F)]?

YES : Go to Step 9.
NO : Go to Step 8.

AK303053

3

4

5

8

9

1

2

6

7

10

CONNECTOR: B-32

HARNESS CONNECTOR:
COMPONENT SIDE

AB

B-32 (B)

AK303053

3

4

5

8

9

1

2

6

7

10

CONNECTOR: B-32

HARNESS CONNECTOR:
COMPONENT SIDE

AB

B-32 (B)

1

2 3

6

7 8

4 5

9 10

AK203093

B-32
INTERMEDIATE
CONNECTOR

AB

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>

13B-431

STEP 8. Check the right bank injector.
(1) Remove the intake manifold.
(2) Disconnect the right bank injector connector, which

deviates from the standard value at Step 6.

(3) Measure the resistance between injector side connector

terminal No. 1 and No. 2.

Standard value: 10.5

− 13.5 ohms [at 20°C (68°F)]

Q: Is the measured resistance between 10.5 and 13.5 ohms

[at 20

°C (68°F)]?

YES : Repair harness wire between injector intermediate

connector and right bank injector connector because
of harness damage. Then go to Step 11.

NO : Replace the injector. Then go to Step 11.

STEP 9. Check the fuel pressure.
Refer to On-vehicle Service

− Fuel Pressure Test

P.13B-1179

.

Q: Is the fuel pressure normal?

YES : Go to Step 10.
NO : Repair it. Then go to Step 11.

AK303055

M

1

2

CONNECTOR: B-01, B-03, B-04

AB

B-01 (GR)

B-03 (GR)

B-04 (GR)

HARNESS CONNECTOR:
COMPONENT SIDE

AK000559

2

1

INJECTOR SIDE
CONNECTOR

AB