Mitsubishi Montero Sport (2004+). Manual - part 251

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-417

STEP 3. Check connector E-30 at the fuel tank temperature 
sensor and connector C-90 at PCM for damage.
Q: Is the 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.

AK200019

3 2 1

CONNECTOR: E-30

AB

HARNESS
CONNECTOR: 
COMPONENT 
SIDE

E-30

AK103762

42

43

48

49

50

51

52

53

54

55

56

57

46 45 44

58

59

60

61

62

63

64

65

66

47

41

AB

CONNECTOR: C-90

C-90(GR)

HARNESS CONNECTOR:
COMPONENT SIDE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-418

STEP 4. Check for short circuit to ground between fuel 
tank temperature sensor connector E-30 (terminal No.1) 
and PCM connector C-90 (terminal No.51).

NOTE: Check harness after checking intermediate connector 
C-85 and E-44. If intermediate connectors are damaged, repair 
or replace them. Refer to GROUP 00E, Harness Connector 
Inspection 

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.

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.13A-4

.

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

YES : Repeat the troubleshooting.
NO :  The procedure is complete.

AK200019

3 2 1

CONNECTOR: E-30

AB

HARNESS
CONNECTOR: 
COMPONENT 
SIDE

E-30

AK103762

42

43

48

49

50

51

52

53

54

55

56

57

46 45 44

58

59

60

61

62

63

64

65

66

47

41

AB

CONNECTOR: C-90

C-90(GR)

HARNESS CONNECTOR:
COMPONENT SIDE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-419

DTC P0183: Fuel Tank Temperature Sensor Circuit High Input

AK303787

Fuel Tank Temperature Sensor Circuit

BL

ACK

YELL

OW

-

BL

UE

BL

ACK

YELL

OW

-

RED

YELL

OW

-

RED

1 2 3

FUEL TANK TEMPERATURE SENSOR
(INTEGRATED IN FUEL GAUGE UNIT)

POWERTRAIN CONTROL MODULE (PCM)

2

3 4

10 11

5 6 7 8 9

1

C-85
MU801551

E-30

3

16

51

6

1

4

5V

1

10

15

2

11

3

12

4

13 14

5

16

6

17

7

18

8

19

9

20

E-44

47

41

42 43

48 49 50 51 52 53 54 55 56 57

46

45

44

58

59

60 61 62 63

64 65 66

C-90
(MU803781)

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-420

.

CIRCUIT OPERATION

• 5-volt voltage is applied to the fuel tank tempera-

ture sensor output terminal (terminal No. 1) from 
the PCM (terminal No. 51) via the resistor in the 
PCM.

• The fuel tank temperature sensor output voltage 

increases when the resistance increases and 
decreases when the resistance decreases. The 
ground terminal (terminal No. 3) is grounded to 
the vehicle body.

.

TECHNICAL DESCRIPTION

• The fuel tank temperature sensor converts the 

fuel tank temperature to a voltage.

• The PCM detects the fuel tank temperature in the 

fuel tank with this output voltage.

.

DESCRIPTIONS OF MONITOR METHODS
Fuel tank temperature sensor output voltage is out of 

specified range.

.

MONITOR EXECUTION
Continuous

.

MONITOR EXECUTION CONDITIONS (Other 
monitor and Sensor)

Other Monitor (There is no temporary DTC stored 

in memory for the item monitored below)

• Not applicable

Sensor (The sensor below is determined to be 

normal)

• Engine coolant temperature sensor

• Intake air temperature sensor

.

AK103912AC

CONNECTOR: C-85

C-85

AK200017

CONNECTOR: E-30

AD

FUEL TANK 
TEMPERATURE 
SENSOR

E-30

AK103738AC

CONNECTOR: C-90

PCM

C-90(GR)

AK200018 AB

CONNECTOR: E-44

E-44