Mitsubishi Eclipse. Manual — part 441

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-307

DTC SET CONDITIONS

Logic Flow Chart

.

Check Conditions

• 2 seconds or more have passed since the start-

ing sequence was completed.

Judgment Criteria

• Right bank heated oxygen sensor (rear) output

voltage has continued to be 1.2 volts or higher for
2 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: )

• Short circuit in right bank heated oxygen sensor

(rear) ground line.

• ECM failed. <M/T>

• PCM failed. <A/T>

• Connector damage.

DIAGNOSIS

Required Special Tool:

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

• MB991824: V.C.I.

• MB991827: USB Cable

• MB991911: Main Harness B

START

END

NO

NO

YES

YES

MALFUNCTION

GOOD

2secs HAVE PASSED?

OUTPUT VOLTAGE > 1.2V

NO

YES

MONITORING

CONDITIONS

AK301441

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-308

STEP 1. Check connector B-28 at right bank heated
oxygen sensor (rear) and connector C-62 at ECM <M/T> or
connector C-59 at PCM <A/T> for damage.
Q: Is the connector in good condition?

YES : Go to Step 2.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection

P.00E-2

. Then go to Step 3.

AK300429

1

2

3

4

RIGHT BANK
HEATED OXYGEN
SENSOR (REAR)

CONNECTOR: B-28

AB

B-28 (GR)

HARNESS CONNECTOR:
COMPONENT SIDE

AK300460

98

78

71

88

89

76

77

72
79
91

73
80

74

75

81
92

82

83

93

84

85

94

86

87

95

96

90

97

CONNECTOR: C-59 <A/T>

C-59 (GR)

AB

HARNESS CONNECTOR:
COMPONENT SIDE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-309

STEP 2. Check for short circuit to power supply between
right bank heated oxygen sensor (rear) connector B-28
(terminal No. 4) and ECM connector C-62 (terminal No. 74)
<M/T> or PCM connector C-59 (terminal No. 74) <A/T>.
Q: Is the harness wire in good condition?

YES : Replace the ECM or PCM. Then go to Step 3.
NO : Repair it. Then go to Step 3.

AK300445

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

CONNECTOR: C-62 <M/T>

C-62 (GR)

AB

HARNESS CONNECTOR:
COMPONENT SIDE

AK300429

1

2

3

4

RIGHT BANK
HEATED OXYGEN
SENSOR (REAR)

CONNECTOR: B-28

AB

B-28 (GR)

HARNESS CONNECTOR:
COMPONENT SIDE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-310

STEP 3. 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 P0138 set?

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

AK300460

98

78

71

88

89

76

77

72
79
91

73
80

74

75

81
92

82

83

93

84

85

94

86

87

95

96

90

97

CONNECTOR: C-59 <A/T>

C-59 (GR)

AB

HARNESS CONNECTOR:
COMPONENT SIDE

AK300445

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

CONNECTOR: C-62 <M/T>

C-62 (GR)

AB

HARNESS CONNECTOR:
COMPONENT SIDE