Mitsubishi Eclipse. Manual - part 560

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-783

STEP 14. Check for harness damage between ignition 
switch connector C-87 (terminal No. 2) and vehicle speed 
sensor connector B-39 (terminal No. 1).

NOTE: Check harness after checking intermediate connectors 
B-36, C-28, C-78, C-112 and C-111. If intermediate connectors 
are damaged, repair or replace them. Refer to GROUP 00E, 
Harness Connector Inspection 

P.00E-2

. Then go to Step 17.

Q: Is the harness wire in good condition?

YES : Go to Step 15.
NO :  Repair it. Then go to Step 17.

AK300425

1

2

3

B-39 (B)

AB

CONNECTOR: B-39

HARNESS CONNECTOR:
COMPONENT SIDE

AK300738

1

2

3

4

5

6

CONNECTOR: C-87

AB

HARNESS CONNECTOR:
COMPONENT SIDE

C-87

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-784

STEP 15. Check for harness damage between vehicle 
speed sensor connector B-39 (terminal No. 3) and ECM 
connector C-62 (terminal No. 80).

NOTE: Check harness after checking intermediate connector 
B-39 If intermediate connector is damaged, repair or replace 
them. Refer to GROUP 00E, Harness Connector Inspection 

P.00E-2

. Then go to Step 17.

Q: Is the harness wire in good condition?

YES : Go to Step 16.
NO :  Repair it. Then go to Step 17.

STEP 16. Check for harness damage between vehicle 
speed sensor connector B-39 (terminal No. 2) and ground.

AK300425

1

2

3

B-39 (B)

AB

CONNECTOR: B-39

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

AK300425

1

2

3

B-39 (B)

AB

CONNECTOR: B-39

HARNESS CONNECTOR:
COMPONENT SIDE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-785

NOTE: Check harness after checking intermediate connector 
B-36 If intermediate connector is damaged, repair or replace 
them. Refer to GROUP 00E, Harness Connector Inspection 

P.00E-2

. Then go to Step 17.

Q: Is the harness wire in good condition?

YES : Check for harness wire between vehicle speed 

sensor connector B-39 (terminal No. 3) and other 
system because of short circuit to ground. Then go to 
Step 17.

NO :  Repair it. Then go to Step 17.

STEP 17. Using scan tool MB991958, check data list item 
24: Vehicle Speed 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) Start the engine.
(3) Set scan tool MB991958 to the data reading mode for item 

24, Vehicle Speed Sensor.

• Check that the speedometer and MB991958 display 

speed match when traveling at a vehicle speed of 40 
km/h (25 mph).

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

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

AK300810

AB

MB991911

16-PIN

MB991827

MB991824 

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-786

DTC P0506: Idle Control System RPM Lower Than Expected

AK101629

1 2
4 5 6

3

RED

-

WHITE

RED

-

WHITE

RED

-

WHITE

RED

RED

RED

GREEN-BL

ACK

GREEN-RED

GREEN-

WHITE

BL

ACK

-YELL

OW

B-34

IDLE AIR
CONTROL (IAC)
MOTOR

BATTERY

MFI
RELAY

1

4

2

3

3

1

2

4

5

6

ENGINE CONTROL
MODULE (ECM) <M/T>
OR
POWERTRAIN CONTROL
MODULE (PCM) <A/T>

14

28

15

29

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

Idle Air Control (IAC) Motor Circuit

3 4

1 2

A-18X