Mitsubishi Eclipse. Manual - part 415

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-203

STEP 4. Using scan tool MB991958, check data list item 21: 
Engine Coolant Temperature 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 

21, Engine Coolant Temperature Sensor.

• The engine coolant temperature and temperature 

shown with the scan tool should approximately match.

(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 :  Replace the ECM or PCM. Then go to Step 14.

STEP 5. Check connector B-11 at engine coolant 
temperature sensor for damage.
Q: Is the connector in good condition?

YES : Go to Step 6.
NO :  Repair or replace it. Refer to GROUP 00E, Harness 

Connector Inspection 

P.00E-2

. Then go to Step 14.

AK300810

AB

MB991911

16-PIN

MB991827

MB991824 

AK300435

1

2

CONNECTOR: B-11

AB

B-11 (B)

HARNESS CONNECTOR:
COMPONENT SIDE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-204

STEP 6. Check the sensor supply voltage at engine coolant 
temperature sensor harness side connector B-11.
(1) Disconnect the connector B-11 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 between 4.5 and 4.9 volts.

(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the measured voltage between 4.5 and 4.9 volts?

YES : Go to Step 8.
NO :  Go to Step 7.

AK300435

1

2

CONNECTOR: B-11

AB

B-11 (B)

HARNESS CONNECTOR:
COMPONENT SIDE

AK000234

B-11 HERNESS 
CONNECTOR: 
COMPONENT SIDE

2 1

AI

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-205

STEP 7. Check connector C-58 at ECM <M/T> or connector 
C-55 at PCM <A/T> for damage.
Q: Is the connector in good condition?

YES : Replace the ECM or PCM. Then go to Step 14.
NO :  Repair or replace it. Refer to GROUP 00E, Harness 

Connector Inspection 

P.00E-2

. Then go to Step 14.

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-206

STEP 8. Check the continuity at engine coolant 
temperature sensor harness side connector B-11.
(1) Disconnect the connector B-11 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 :  Go to Step 9.

AK300435

1

2

CONNECTOR: B-11

AB

B-11 (B)

HARNESS CONNECTOR:
COMPONENT SIDE

AK000235

B-11 HERNESS 
CONNECTOR: 
COMPONENT SIDE

AI

2 1