Mitsubishi Eclipse. Manual - part 501

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-547

STEP 7. Check the compression.
Refer to GROUP 11C, On-Vehicle Service 

− Compression 

Pressure Check 

P.11C-10

.

Q: Are there any abnormalities?

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

STEP 8. 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 6 − 

Other Monitor 

P.13B-7

.

(3) Check the diagnostic trouble code (DTC).
Q: Are DTC P0301, P0302, P0303, P0304, P0305 and P0306 

sets?
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: Are DTC P0301, P0302, P0303, P0304, P0305 and P0306 

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

AK300754

1

2

CONNECTORS: B-01, B-02, B-05, B-06, 
                            B-25, B-26

AB

B-01 (GR)

B-05 (GR)

B-26 (GR)

B-02 (GR)

B-06 (GR)

B-25 (GR)

HARNESS CONNECTOR:
COMPONENT SIDE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-548

DTC P0325: Knock Sensor Circuit

1 2

WHITE

BL

ACK

BL

ACK

ENGINE CONTROL
MODULE (ECM)
OR
POWERTRAIN CONTROL
MODULE (PCM)

91 <M/T>
90 <A/T>

    B-35
MU802661

1

2

KNOCK SENSOR

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

 C-62 <M/T>
(MU803783)

Knock Sensor Circuit 

AK101631

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

 C-59 <A/T>
(MU803782)

AK300093AB

B-35 (GR)

CONNECTOR: B-35 <WITHOUT INTAKE 
MANIFOLD TUNING  SYSTEM>

KNOCK SENSOR

AK300111

CONNECTOR: B-20 <WITH INTAKE 
MANIFOLD TUNING  SYSTEM>

AB

B-20 (B)

CRANKSHAFT
POSITION
SENSOR

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-549

.

CIRCUIT OPERATION

• The knock sensor sends a signal voltage to the 

ECM (terminal No. 91) <M/T> or PCM (terminal 
No. 90) <A/T>.

.

TECHNICAL DESCRIPTION

• The knock sensor converts the vibration of the 

cylinder block into a voltage and outputs it. If 
there is a malfunction of the knock sensor, the 
voltage output will not change.

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

the voltage output changes.

.

DTC SET CONDITIONS

Check Conditions

• 2 seconds or more have passed since the start-

ing sequence was completed.

• Engine speed is higher than 3,000 r/min.

Judgment Criteria

• Knock sensor output voltage (knock sensor peak 

voltage in each 1/3 turn of the crankshaft) has not 
changed more than 0.06 volt in the last consecu-
tive 200 periods.

.

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

• Knock sensor failed.

• Open or shorted knock sensor circuit harness 

damage, or connector damage.

• ECM <M/T> failed.

• PCM <A/T> failed.

DIAGNOSIS

Required Special Tools:

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

• MB991824: V.C.I.

• MB991827: USB Cable

• MB991911: Main Harness B

AK300244

CONNECTOR: C-59 <A/T>

AE

PCM

C-59 (GR)

AK300094

CONNECTOR: C-62 <M/T>

ECM

AB

C-62 (GR)

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-550

STEP 1. Check connector B-35 at the knock sensor 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 6.

AK300444

1

2

AB

B-35 (GR)

CONNECTOR: B-35 <WITHOUT INTAKE 
MANIFOLD TUNING  SYSTEM>

KNOCK SENSOR

HARNESS 
CONNECTOR:
COMPONENT SIDE

AK300749

1

2

KNOCK SENSOR

CONNECTOR: B-35 <WITH INTAKE 
MANIFOLD TUNING  SYSTEM>

AB

B-35 (GR)

HARNESS CONNECTOR:
COMPONENT SIDE