Mitsubishi Eclipse. Manual - part 483

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-475

STEP 6. Check the fuel pressure.
Refer to Fuel Pressure Test 

P.13B-1106

.

Q: Is the fuel pressure normal?

YES : Go to Step 7.
NO :  Repair or replace it. Then go to Step 8.

STEP 7. Replace the left bank injector.
(1) Replace the left bank injector.
(2) Carry out a test drive with the drive cycle pattern. Refer to 

Diagnostic Function 

− OBD-II Drive Cycle − Procedure 2 − 

Fuel Trim Monitor 

P.13B-7

.

(3) Check the diagnostic trouble code (DTC).
Q: Is DTC P0175 set?

YES : Replace the ECM or PCM. Then go to Step 8.
NO :  The inspection is complete.

STEP 8. 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 2 − 

Fuel Trim Monitor 

P.13B-7

.

(2) Check the diagnostic trouble code (DTC).
Q: Is DTC P0175 set?

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

AK300753

1

2

CONNECTORS: B-02, B-06, B-25

AB

B-02 (GR)

B-06 (GR) B-25 (GR)

HARNESS CONNECTOR:
COMPONENT SIDE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-476

DTC P0181: Fuel Tank Temperature Sensor Circuit Range/Performance

5 V

ENGINE CONTROL
MODULE (ECM) <M/T>
OR
POWERTRAIN CONTROL
MODULE (PCM) <A/T> 

FUEL TEMPERATURE SENSOR
(INTEGRATED IN FUEL PUMP MODULE)

Fuel Temperature Sensor Circuit

12

3

1

37

BL

ACK

GRA

Y

-

GREEN

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

 C-55 <A/T>

(MU803781)

AK101604

96 <M/T>
51 <A/T>

4

17

1

12 13 14

18

30

41

34

3

16

10

6 7

19

31

42

20

32

43

21

33

25

24

26

36

35

37

29

28

15

27

38

8 9

39 40

11

2

22

5

23

C-90

C-28

7 8

5

3 4

35

34

10 11 12

2122 23 24

13 14 15

25 26 27

16

28

17

18 19 20

29

30 31

32 33

36 37

38

9

1 2

6

1 2 3

4 5

      D-17
(MU802058)

GRA

Y

-

GREEN

GRA

Y

-

GREEN

80

87

81

94

85

82

84

93

86

98

99

74

92

73

83

88

91

95

97

96

100

89

78

71

90

76 77

75

72
79

C-62 <M/T>
(MU803783)

AK300244

CONNECTOR: C-55 <A/T>

AG

PCM

C-55 (GR)

AK300094

CONNECTOR: C-62 <M/T>

ECM

AB

C-62 (GR)

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-477

.

CIRCUIT OPERATION

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

ture sensor output terminal (terminal No. 3) from 
the ECM (terminal No. 96) <M/T> or PCM (termi-
nal No. 51) <A/T> via the resistor in the ECM 
<M/T> or PCM <A/T>.

• The fuel tank temperature sensor output voltage 

increases when the resistance increases and 
decreases when the resistance decreases. The 
ground terminal (terminal No. 1) is grounded to 
the vehicle body.

.

TECHNICAL DESCRIPTION

• The fuel tank temperature sensor converts the 

fuel tank temperature to a voltage.

• The ECM <M/T> or PCM<A/T> detects the fuel 

tank temperature in the fuel tank with this output 
voltage.

.

DESCRIPTIONS OF MONITOR METHODS
Fuel tank temperature at engine start is higher than 

engine coolant temperature at engine start by 
specified value when engine is cold start condi-
tion.

.

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

.

AK300119

CONNECTOR: C-28

AB

C-28

AK300118

CONNECTOR: C-90

AB

C-90

AK300120AB

D-17 (GR)

CONNECTOR: D-17

FUEL TEMPERATURE 
SENSOR
(INTEGRATED IN 
 FUEL PUMP MODULE)

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-478

Logic Flow Chart

.

Check Conditions

• The engine coolant temperature − intake air tem-

perature is 5

°C (9°F) or less when the engine is 

started.

• The engine coolant temperature is between 

−10°C (14°F) and 36°C (97°F) when the engine is 

started.

• Engine coolant temperature is higher than 60°C 

(140

°F).

• Maximum vehicle speed is higher than 30 km/h 

(17 mph) after the starting sequence has been 
completed.

Judgement Criteria

• The fuel tank temperature − engine coolant tem-

perature is 15

°C (27°F) or more when the engine 

is started.

.

START

NO

YES

YES

YES

YES

NO

NO

NO

END

NO

YES

YES

NO

MALFUNCTION

GOOD

MONITORING

CONDITIONS

“FUEL TEMP. AT 

ENGINE START” -

“ENGINE COOLANT TEMP. AT 

ENGINE START”

> 15˚C (27˚F)

ENGINE COOLANT TEMP.

> =60˚C (140˚F)

ENGINE COOLANT TEMP.

> =60˚C (140˚F)

MAX.VEHICLE SPEED

> 30km/h (17mph)

MAX.VEHICLE SPEED

> 30km/h (17mph)

AK301444