Mitsubishi Eclipse. Manual — part 559

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-779

STEP 6. Check the sensor supply voltage at ECM
connector C-62 by backprobing.
(1) Do not disconnect the ECM connector C-62.
(2) Disconnect the vehicle speed sensor connector B-39.
(3) Turn the ignition switch to the "ON" position.

(4) Measure the voltage between terminal No. 80 and ground

by backprobing.

• Voltage should be between 4.8 and 5.2 volts.

(5) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the measured voltage between 4.8 and 5.2 volts?

YES : Go to Step 7.
NO : Replace the ECM. Then go to Step 17.

STEP 7. Check connector C-62 at ECM for damage.
Q: Is the connector in good condition?

YES : Check connector B-36 at intermediate connector for

damage, and repair or replace as required. Refer to
GROUP 00E, Harness Connector Inspection

P.00E-2

. If intermediate connector is in good

condition, repair harness wire between vehicle speed
sensor connector B-39 (terminal No. 3) and ECM
connector C-62 (terminal No. 80) because of open
circuit. Then go to Step 17.

NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection

P.00E-2

. Then go to Step 17.

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

AK000258

71 72

73 74

78

80 81

79

82 83 84 85 86 87 88 89

75 76

91 92 93

94 95

96

98

99

97

AK000258AE

C-62 HARNESS
CONNECTOR:
HARNESS SIDE

77

90

100

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

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-780

STEP 8. Check connector B-39 at vehicle speed sensor for
damage.
Q: Is the connector in good condition?

YES : Go to Step 9.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection

P.00E-2

. Then go to Step 17.

STEP 9. Check the power supply voltage at vehicle speed
sensor harness side connector B-39.
(1) Disconnect the connector B-39 and measure at the harness

side.

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

(3) Measure the voltage between terminal No. 1 and ground.

• Voltage should be battery positive voltage.

(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is battery positive voltage (approximately 12 volts)

present?
YES : Go to Step 10.
NO : Check connectors B-36, C-28, C-78, C-112 and C-111

at intermediate connector for damage, and repair or
replace as required. Refer to GROUP 00E, Harness
Connector Inspection

P.00E-2

. If intermediate

connectors are in good condition, repair harness wire
between ignition switch connector C-87 (terminal No.
2) and vehicle speed sensor connector B-39 (terminal
No. 1) because of open circuit or short circuit to
ground. Then go to Step 17.

AK300425

1

2

3

B-39 (B)

AB

CONNECTOR: B-39

HARNESS CONNECTOR:
COMPONENT SIDE

AK300425

1

2

3

B-39 (B)

AB

CONNECTOR: B-39

HARNESS CONNECTOR:
COMPONENT SIDE

AKX01425AI

1

2

3

B-39 HARNESS
CONNECTOR:
COMPONENT SIDE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-781

STEP 10. Check the continuity at vehicle speed sensor
harness side connector B-39.
(1) Disconnect the connector B-39 and measure at the harness

side.

(2) Check for the continuity between terminal No. 2 and

ground.

• Should be less than 2 ohms.

Q: Is the continuity normal?

YES : Go to Step 11.
NO : Check connector B-36 at intermediate connector for

damage, and repair or replace as required. Refer to
GROUP 00E, Harness Connector Inspection

P.00E-2

. If intermediate connector is in good

condition, repair harness wire between vehicle speed
sensor connector B-39 (terminal No. 2) and ground
because of open circuit or harness damage. Then go
to Step 17.

AK300425

1

2

3

B-39 (B)

AB

CONNECTOR: B-39

HARNESS CONNECTOR:
COMPONENT SIDE

AKX01426

3 2 1

B-39 HARNESS
CONNECTOR:
COMPONENT SIDE

AR

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-782

STEP 11. Check the sensor supply voltage at vehicle speed
sensor harness side connector B-39.
(1) Disconnect the vehicle speed sensor connector B-39 and

measure at the harness side.

(2) Disconnect the combination meter connector and

auto-cruise control-ECU connector.

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

(4) Measure the voltage between terminal No. 3 and ground.

• Voltage should be between 4.8 and 5.2 volts.

(5) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the measured voltage between 4.8 and 5.2 volts?

YES : Go to Step 12.
NO : Check connector B-36 at intermediate connector for

damage, and repair or replace as required. Refer to
GROUP 00E, Harness Connector Inspection

P.00E-2

. If intermediate connector is in good

condition, repair harness wire between vehicle speed
sensor connector B-39 (terminal No. 3) and ECM
connector C-62 (terminal No. 80) because of short
circuit to ground or harness damage. Then go to Step
17.

STEP 12. Check the vehicle speed sensor.
Refer to GROUP 54A, Combination Metres Assembly and
Vehicle Speed Sensor

− Combination Metres Assembly and

Vehicle Speed Sensor

− Inspection

P.54A-113

.

Q: Is the vehicle speed sensor normal?

YES : Go to Step 13.
NO : Replace the vehicle speed sensor. Then go to Step

17.

STEP 13. Check connector C-62 at ECM for damage.
Q: Is the connector in good condition?

YES : Go to Step 14.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection

P.00E-2

. Then go to Step 17.

AK300425

1

2

3

B-39 (B)

AB

CONNECTOR: B-39

HARNESS CONNECTOR:
COMPONENT SIDE

AKX01427

3 2 1

AR

B-39 HARNESS
CONNECTOR:
COMPONENT SIDE

AK300425

1

2

3

B-39 (B)

AB

CONNECTOR: B-39

HARNESS CONNECTOR:
COMPONENT SIDE