Mitsubishi Galant (2004+). Manual - part 1191

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>

13B-457

STEP 2. Check the fuel tank temperature sensor.

(1) Disconnect the fuel tank temperature sensor connector 

D-18.

(2) Measure the resistance between terminal No. 1 and No. 3 

of the fuel tank temperature sensor.

Standard value:

0.5 

− 12.0 kΩ

Q: Is the measured resistance between 0.5 and 12.0 k

Ω?

YES : Go to Step 3.
NO :  Replace the fuel tank temperature sensor. Then go to 

Step 5.

1

2

3

4

5

AK303088

HARNESS
CONNECTOR:
COMPONENT SIDE

SERVICE
HOLE

AB

FUEL PUMP MODULE
(INCORPORATING FUEL LEVEL
SENSOR (MAIN) AND FUEL
TANK TEMPERATURE SENSOR)

CONNECTOR: D-18

D-18 (GR)

1

2 3

4

5

AK203165

FUEL TANK TEMPERATURE
SENSOR CONNECTOR

AB

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>

13B-458

STEP 3. Check harness connector D-18 at the fuel tank 
temperature sensor and harness connector B-20 at PCM 
for damage.

Q: Is the harness connector in good condition?

YES : Go to Step 4.
NO :  Repair or replace it. Refer to GROUP 00E, Harness 

Connector Inspection 

P.00E-2

. Then go to Step 5.

1

2

3

4

5

AK303088

HARNESS
CONNECTOR:
COMPONENT SIDE

SERVICE
HOLE

AB

FUEL PUMP MODULE
(INCORPORATING FUEL LEVEL
SENSOR (MAIN) AND FUEL
TANK TEMPERATURE SENSOR)

CONNECTOR: D-18

D-18 (GR)

AK303092

25

21

24 23 22

29 28 27 26

34 33 32 31 30

38 37 36 35

43 42 41 40 39

CONNECTOR: B-20

B-20

PCM

AB

HARNESS CONNECTOR: 
COMPONENT SIDE

AIR CLEANER

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>

13B-459

STEP 4. Check for short circuit to ground between fuel 
tank temperature sensor connector D-18 and PCM 
connector B-20.

NOTE: Check harness after checking intermediate connector 
C-25. If the intermediate connector is damaged, repair or 
replace it. Refer to GROUP 00E, Harness Connector Inspec-
tion 

P.00E-2

. Then go to Step 5.

Q: Is the harness wire in good condition?

YES : Replace the PCM. Then go to Step 5.
NO :  Repair it. Then go to Step 5.

1

2

3

4

5

AK303088

HARNESS
CONNECTOR:
COMPONENT SIDE

SERVICE
HOLE

AB

FUEL PUMP MODULE
(INCORPORATING FUEL LEVEL
SENSOR (MAIN) AND FUEL
TANK TEMPERATURE SENSOR)

CONNECTOR: D-18

D-18 (GR)

AK303092

25

21

24 23 22

29 28 27 26

34 33 32 31 30

38 37 36 35

43 42 41 40 39

CONNECTOR: B-20

B-20

PCM

AB

HARNESS CONNECTOR: 
COMPONENT SIDE

AIR CLEANER

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>

13B-460

STEP 5. Test the OBD-II drive cycle.

(1) Carry out a test drive with the drive cycle pattern. Refer to 

Diagnostic Function 

− OBD-II Drive Cycle − Procedure 6 − 

Other Monitor 

P.13B-5

.

(2) Check the diagnostic trouble code (DTC).
Q: Is DTC P0182 set?

YES : Retry the troubleshooting.
NO :  The inspection is complete.

DTC P0183: Fuel Tank Temperature Sensor Circuit High Input

POWERTRAIN CONTROL
MODULE (PCM)

Fuel Tank Temperature  Sensor  Circuit

7

3

1

BLA

CK

D-18

(MU802058)

AK302848

41

FUEL TANK TEMPERATURE SENSOR
(INTEGRATED IN FUEL PUMP MODULE)

C-25

5 V

GRA

Y

-

GREEN

GRA

Y

-

GREEN

B-20

1

2 3

4

5

22

21

23 24 25

26 27 28 29

30 31 32 33 34

35 36 37 38

39 40 41 42 43