Mitsubishi Eclipse. Manual - part 212

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-341

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 (28.0 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 P2227 

− Barometric Pressure Circuit 

Range/Performance Problem 

P.13A-695

, DTC P2228 

− Barometric Pressure Circuit Low Input 

P.13A-705

, 

DTC P2229 

− Barometric Pressure Circuit High Input 

P.13A-725

.

STEP 5. Check the injector.
(1) Disconnect each injector connector.

(2) Measure the resistance between injector side connector 

terminal No. 1 and No. 2.

Standard value: 13 

− 16 ohms [at 20°C (68°F)]

Q: Is the resistance between 13 and 16 ohms?

YES : Go to Step 6.
NO :  Replace the injector. Then go to Step 8.

AK300810

AB

MB991911

16-PIN

MB991827

MB991824 

AK300737

1

2

CONNECTORS: B-01, B-02, B-05, B-06

AB

B-02 (GR)

B-01 (GR)

B-05 (GR)

B-06 (GR)

HARNESS CONNECTOR:
COMPONENT SIDE

AK000241

INJECTOR SIDE
CONNECTOR

1 2

AB

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-342

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

P.13A-929

.

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 injector.
(1) Replace the 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.13A-5

.

(3) Check the diagnostic trouble code (DTC).
Q: Is DTC P0172 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.13A-5

.

(2) Check the diagnostic trouble code (DTC).
Q: Is DTC P0172 set?

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

AK300737

1

2

CONNECTORS: B-01, B-02, B-05, B-06

AB

B-02 (GR)

B-01 (GR)

B-05 (GR)

B-06 (GR)

HARNESS CONNECTOR:
COMPONENT SIDE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-343

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)

82

78

81

80

89 90 91 92

79

87

71

74

73

72

76

75

77

85

88

83 84

86

 C-60 <M/T>
(MU803772)

Fuel Temperature Sensor Circuit

12

3

1

37

BLA

C

K

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-54 <A/T>

(MU803781)

AK101534

77 <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

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-344

.

CIRCUIT OPERATION

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

ture sensor output terminal (terminal No. 3) from 
the ECM (terminal No. 77) <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

.

AK300060

ECM

CONNECTOR: C-60 <M/T>

AE

C-60 (G)

AK300060AB

C-54 (GR)

PCM

CONNECTOR: C-54 <A/T>

AK300119

CONNECTOR: C-28

AB

C-28

AK300120AB

D-17 (GR)

CONNECTOR: D-17

FUEL TEMPERATURE 
SENSOR
(INTEGRATED IN 
 FUEL PUMP MODULE)

AK300118

CONNECTOR: C-90

AB

C-90