Mitsubishi Galant. Manual — part 242

MULTIPORT FUEL INJECTION(MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-193

STEP 3. Using scan tool MB991502, check data list item 12:
Volume Air Flow Sensor.

CAUTION

To prevent damage to scan tool MB991502, always turn the
ignition switch to the "LOCK"(OFF) position before
connecting or disconnecting scan tool MB991502.
(1) Connect scan tool MB991502 to the data link connector.
(2) Start the engine and run at idle.
(3) Set scan tool MB991502 to the data reading mode for item

12, Volume Air Flow Sensor.

(4) Warm up the engine to normal operating temperature: 80

°

C to 96

°

C(176

°

F to 205

°

F).

•

When idling, between 17 and 46 Hz (between 2.2 and
5.7 g/s).

•

When 2,500 r/min, between 63 and 103 Hz (between
9.0 and 14.7 g/s).

(5) Turn the ignition switch to the "LOCK"(OFF) position.

Q: Is the sensor operating properly?

YES : Go to Step 4.
NO : Refer to, DTC P0101

−

Volume Air Flow Circuit

Range/Performance Problem(

P.13B-25

),DTC P0102

−

Volume Air Flow Circuit Low Input(

P.13B-31

), DTC

P0103 - Volume Air Flow Circuit High Input(

P.13B-

34

).

STEP 4. Using scan tool MB991502, check data list item 13:
Intake Air Temperature Sensor.
(1) Turn the ignition switch to the "ON" position.
(2) Set scan tool MB991502 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 5.
NO : Refer to, DTC P0111

−

Intake Air Temperature Circuit

Range/Performance Problem(

P.13B-56

).

AC003081 AB

16 PIN

MB991502

AC003081 AB

16 PIN

MB991502

MULTIPORT FUEL INJECTION(MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-194

STEP 5. Using scan tool MB991502, check data list item 21:
Engine Coolant Temperature Sensor.
(1) Turn the ignition switch to the "ON" position.
(2) Set scan tool MB991502 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 6.
NO : Refer to, DTC P0115

−

Engine Coolant Temperature

Circuit High Input(

P.13B-65

), DTC P0116

−

Engine

Coolant Temperature Circuit Range/Performance
Problem(

P.13B-73

), DTC P0117

−

Engine Coolant

Temperature Circuit Low Input(

P.13B-78

).

STEP 6. Using scan tool MB991502, check data list item 25:
Barometric Pressure Sensor.
(1) Turn the ignition switch to the "ON" position.
(2) Set scan tool MB991502 to the data reading mode for item

25, Barometric Pressure Sensor.

•

When altitude is 0 m(0 foot), 101 kPa.

•

When altitude is 600 m(1,969 feet), 95 kPa.

•

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

•

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

(3) Turn the ignition switch to the "LOCK"(OFF) position.

Q: Is the sensor operating properly?

YES : Go to Step 7.
NO : Refer to, DTC P0107

−

Barometric Pressure Circuit

Low Input(

P.13B-40

), DTC P0108

−

Barometric

Pressure Circuit High Input(

P.13B-49

).

STEP 7. Check connector B-26 at injector intermediate
connector for damage.
Q: Is the connector in good condition?

YES : Go to Step 8.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection (

P.00E-2

). Then go to Step 16.

AC003081 AB

16 PIN

MB991502

AC003081 AB

16 PIN

MB991502

AK000618

AB

CONNECTOR:B-26

MULTIPORT FUEL INJECTION(MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-195

STEP 8. Check the right bank injector resistance at
intermediate connector B-26.
(1) Disconnect the injector intermediate connector B-26.
(2) Measure the resistance between each male connector side

connector terminal.

a. Measure the resistance between terminal 1 and 2 when

measuring No.1 cylinder.

b. Measure the resistance between terminal 1 and 3 when

measuring No.3 cylinder.

c. Measure the resistance between terminal 1 and 4 when

measuring No.5 cylinder.

•

Resistance should be between 13 and 16 ohm [at 20

°

C

(68

°

F)].

Q: Is the resistance normal?

YES : Go to Step 11.
NO : Go to Step 9.

STEP 9. Check connector B-19, B-22, B-25 at right bank
injector for damage.
(1) Remove the intake manifold.
(2) Check the injector connector, which deviates from the

standard value at Step 8.

Q: Is the connector in good condition?

YES : Go to Step 10.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection (

P.00E-2

). Then go to Step 16.

AK000618

AB

CONNECTOR:B-26

AK000240AB

INJECTOR
INTERMEDIATE
CONNECTOR

1 2
3 4

AK000618AC

CONNECTORS:B-19,B-22,B-25

B-25

B-19

B-22

MULTIPORT FUEL INJECTION(MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-196

STEP 10. Check the right bank injector.
(1) Disconnect the right bank injector connector, which

deviates from the standard value at Step 8.

(2) Measure the resistance between injector side connector

terminal 1 and 2.

Standard value: 13

−−−−

16 ohm [at 20

°°°°

C (68

°°°°

F)]

Q: Is the resistance standard value?

YES : Repair harness wire between injector intermediate

connector and right bank injector connector because
of harness damage. Then go to Step 16.

NO : Replace the injector. Then go to Step 16.

STEP 11. Check connector C-39 at PCM for damage.
Q: Is the connector in good condition?

YES : Go to Step 12.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection (

P.00E-2

). Then go to Step 16.

AK000618AC

CONNECTORS:B-19,B-22,B-25

B-25

B-19

B-22

AK000559

2

1

INJECTOR SIDE
CONNECTOR

AB

AK000280

CONNECTOR : C-39

PCM

AW