Mitsubishi Eclipse. Manual - part 584

 

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Mitsubishi Eclipse. Manual - part 584

 

 

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-879

DTC SET CONDITIONS

Logic Flow Chart

.

Check Conditions

• 2 seconds or more have passed since the start-

ing sequence was completed.

• Battery positive voltage is higher than 8 volts.

Judgement Criteria

• Barometric pressure sensor output has continued 

to be 49 kPa (14.5 in.Hg) or lower approximately 
15,000 ft above sea level for 10 seconds.

.

OBD-ll DRIVE CYCLE PATTERN
Refer to , Diagnostic Function 

− OBD-ll Drive Cycle − 

Procedure 6 

− Other Monitor 

P.13B-7

.

.

TROUBLESHOOTING HINTS (The most likely 
causes for this code to be set are: )

• Barometric pressure sensor failed.

• Open or shorted barometric pressure sensor cir-

cuit harness damage, or connector damage.

• ECM failed. <M/T>

• PCM failed. <A/T>

DIAGNOSIS

Required Special Tools:

• MB991958: Scan Tool (MUT-III Sub Assembly)

• MB991824: V.C.I.

• MB991827: USB Cable

• MB991911: Main Harness B

START

END

NO

NO

NO

YES

YES

YES

MALFUNCTION

GOOD

NO

YES

AK301456

MONITORING

CONDITIONS

BAROMETRIC PRESSURE

< 50kPa (14.8in.Hg)

BAROMETRIC PRESSURE

> 113kPa (33.4in.Hg)

CONTINUOUS

FAILURE FOR 10secs

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-880

STEP 1. Using scan tool MB991958, check data list item 25: 
Barometric Pressure Sensor.

CAUTION

To prevent damage to scan tool MB991958, always turn the 
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) 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 (28.1 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).

(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the sensor operating properly?

YES : It can be assumed that this malfunction is intermittent. 

Refer to GROUP 00, How to Use Troubleshooting/ 
Inspection Service Points 

P.00-6

.

NO :  Go to Step 2.

STEP 2. Check the sensor output voltage at barometric 
pressure sensor connector B-14 by backprobing.
(1) Do not disconnect the connector B-14.
(2) Turn the ignition switch to the "ON" position.

(3) Measure the voltage between terminal 2 and ground by 

backprobing.

• When altitude is 0 m (0 foot), voltage should be 3.7 and 

4.3 volts.

• When altitude is 600 m (1,969 feet), voltage should be 

3.4 and 4.0 volts.

• When altitude is 1,200 m (3,937 feet), voltage should be 

3.2 and 3.8 volts.

• When altitude is 1,800 m (5,906 feet), voltage should be 

2.9 and 3.5 volts.

(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the voltage normal?

YES : Go to Step 3.
NO :  Go to Step 7.

AK300810

AB

MB991911

16-PIN

MB991827

MB991824 

AK300078

3

4

5

1

2

6

7

CONNECTOR: B-14

AB

B-14 (B)

HARNESS 
CONNECTOR:
COMPONENT SIDE

AKX01520AG

1 2 3 4 5 6 7

B-14 HARNESS
CONNECTOR:
HARNESS SIDE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-881

STEP 3. Check the sensor output voltage at ECM 
connector C-58 <M/T> or PCM connector C-55 <A/T> by 
backprobing.
(1) Do not disconnect the connector C-58 <M/T> or C-55 

<A/T>.

(2) Turn the ignition switch to the "ON" position.

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-882

(3) Measure the voltage between terminal 51 <M/T> or terminal 

55 <A/T> and ground by backprobing.

• When altitude is 0 m (0 foot), voltage should be 3.7 and 

4.3 volts.

• When altitude is 600 m (1,969 feet), voltage should be 

3.4 and 4.0 volts.

• When altitude is 1,200 m (3,937 feet), voltage should be 

3.2 and 3.8 volts.

• When altitude is 1,800 m (5,906 feet), voltage should be 

2.9 and 3.5 volts.

(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the voltage normal?

YES : Go to Step 4.
NO :  Go to Step 6.

AK000229

41424344
48

50 51

49

52 5354555657 58 59

45 46 47

60 61

626364

65

67 68

66

AE

<M/T>

C-58 HARNESS 
CONNECTOR: 
HARNESS SIDE

AKX01522

41

AH

<A/T>

C-55 HARNESS 
CONNECTOR: 
HARNESS SIDE

42 43

44 45 46

47 48 49 50 51 52 53 54 55 56 57

58 59

60 61 62 63

64 65 66

 

 

 

 

 

 

 

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