Mitsubishi Eclipse. Manual - part 588

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-895

STEP 15. Check connector B-14 at barometric pressure 
sensor for damage.
Q: Is the connector in good condition?

YES : Go to Step 16.
NO :  Repair or replace it. Refer to GROUP 00E, Harness 

Connector Inspection 

P.00E-2

. Then go to Step 18.

STEP 16. Check connector C-58 at ECM <M/T> or 
connector C-55 at PCM <A/T> for damage.
Q: Is the connector in good condition?

YES : Go to Step 17.
NO :  Repair or replace it. Refer to GROUP 00E, Harness 

Connector Inspection 

P.00E-2

. Then go to Step 18.

AK300078

3

4

5

1

2

6

7

CONNECTOR: B-14

AB

B-14 (B)

HARNESS 
CONNECTOR:
COMPONENT SIDE

AK300462

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

CONNECTOR: C-55 <A/T>

C-55 (GR)

AB

HARNESS CONNECTOR:
COMPONENT SIDE

AK300748

65

43
50

42
49

41
48
60

61

64

46

47

58

59

67

68

45

56
66

52 51

44

53

62

54

63

57

55

CONNECTOR: C-58 <M/T>

AB

C-58 (GR)

HARNESS CONNECTOR:
COMPONENT SIDE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-896

STEP 17. Check for short circuit to ground and harness 
damage between barometric pressure sensor connector 
B-14 (terminal No. 2) and ECM connector C-58 (terminal 
No. 51) <M/T> or PCM connector C-55 (terminal No. 55) 
<A/T>.
Q: Is the harness wire in good condition?

YES : Replace the volume airflow sensor. Then go to Step 

18.

NO :  Repair it. Then go to Step 18.

AK300078

3

4

5

1

2

6

7

CONNECTOR: B-14

AB

B-14 (B)

HARNESS 
CONNECTOR:
COMPONENT SIDE

AK300462

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

CONNECTOR: C-55 <A/T>

C-55 (GR)

AB

HARNESS CONNECTOR:
COMPONENT SIDE

AK300748

65

43
50

42
49

41
48
60

61

64

46

47

58

59

67

68

45

56
66

52 51

44

53

62

54

63

57

55

CONNECTOR: C-58 <M/T>

AB

C-58 (GR)

HARNESS CONNECTOR:
COMPONENT SIDE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-897

STEP 18. 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-7

.

(2) Check the diagnostic trouble code (DTC).
Q: Is DTC P2228 set?

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

DTC P2229: Barometric Pressure Circuit High Input

AK301513

7

4 5 6

1 2 3

GREEN-YELLO

W

GREEN-WHITE

BR

O

W

N

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

5 V

B-14

BAROMETRIC PRESSURE SENSOR
(INCORPORATED IN VOLUME 
AIRFLOW SENSOR)

1

2

5

42 <M/T>*1
46 <A/T>*3

51 <M/T>*1
55 <A/T>*3

34 <M/T>*2
16 <A/T>*4

65

43
50

42
49

41
48
60 61

64

46 47
58 59
67 68

45

56
66

52

51

44

53

62

54

63

57

55

C-58 <M/T>
(MU803782)

C-55 <A/T>
(MU803781)

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

Barometric Pressure Sensor Circuit

NOTE
*1: ECM connector C-58 <M/T>
*2: ECM connector C-51 <M/T>
*3: PCM connector C-55 <A/T>
*4: PCM connector C-52< A/T>

C-51 <M/T>, C-52 <A/T>
         (MU803784)

2

3 4

5 6

7 8

9

11 12 13 14 15 16 17 18 19 20

30

21 22 23

24 25

26 27 28 29

3132 33

34 35

1

10

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-898

.

CIRCUIT OPERATION

• A 5-volt voltage is supplied to the barometric 

pressure sensor power terminal (terminal No. 1) 
from the ECM (terminal No. 42) <M/T> or PCM 
(terminal No. 46) <A/T>. The ground terminal 
(terminal No. 5) is grounded with ECM (terminal 
No. 34) <M/T> or PCM (terminal No. 16) <A/T>.

• A voltage that is proportional to the atmospheric 

pressure is sent to the ECM (terminal No. 51) 
<M/T> or PCM (terminal No. 55) <A/T> from the 
barometric pressure sensor output terminal (ter-
minal No. 2).

.

TECHNICAL DESCRIPTION

• The barometric pressure sensor outputs a volt-

age which corresponds to the barometric pres-
sure.

• The ECM <M/T> or PCM <A/T> checks whether 

this voltage is within a specified range.

.

DESCRIPTIONS OF MONITOR METHODS
Barometric pressure sensor output voltage is out of 

reasonable barometric pressure 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)

• Not applicable

.

AK300053

CONNECTOR: B-14

AC

BAROMETRIC
PRESSURE
SENSOR

B-14 (B)

AK300091

CONNECTORS: C-51, C-58 <M/T>

ECM

AB

C-51 (GR)

C-58 (GR)

AK300244

CONNECTORS: C-52, C-55 <A/T>

AB

PCM

C-52 (GR)

C-55 (GR)