Mitsubishi Eclipse. Manual - part 583

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-875

STEP 7. Check for open circuit and harness damage 
between barometric pressure sensor connector B-14 and 
ECM connector C-58 <M/T> or PCM connector C-55 <A/T>.
Q: Is the harness wire in good condition?

YES : Go to Step 8.
NO :  Repair it. Then go to Step 9.

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-876

STEP 8. Replace the barometric pressure sensor.
(1) Replace the barometric pressure sensor.
(2) 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

.

(3) Check the diagnostic trouble code (DTC).
Q: Is DTC P2227 set?

YES : Replace the ECM or PCM. Then go to Step 9.
NO :  The inspection is complete.

STEP 9. 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 P2227 set?

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

AK300078

3

4

5

1

2

6

7

CONNECTOR: B-14

AB

B-14 (B)

HARNESS 
CONNECTOR:
COMPONENT SIDE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-877

DTC P2228: Barometric Pressure Circuit Low 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

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)

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-878

.

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

.

AK300244

CONNECTORS: C-52, C-55 <A/T>

AB

PCM

C-52 (GR)

C-55 (GR)