Mitsubishi Montero Sport (2004+). Manual - part 261

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-457

STEP 3. Check connector A-43 at the crankshaft position 
sensor for damage.
Q: Is the connector in good condition?

YES : Go to Step 4.
NO :  Repair or replace it. Refer to GROUP 00E, Harness 

Connector Inspection 

P.00E-2

. Then go to Step 20.

STEP 4. Using scan tool MB991958, check data list item 22: 
Crankshaft Position 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 

22, Crankshaft Position Sensor.

• The tachometer and engine speed indicated on the scan 

tool should much.

(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.00-7

.

NO :  Replace the PCM. Then go to Step 20.

AK200494

1

2

3

A-43(B)

AB

CONNECTOR: A-43

HARNESS 
CONNECTOR: 
COMPONENT SIDE

CRANKSHAFT
POSITION
SENSOR

AK303629AB

MB991911

MB991827

MB991824 

16-PIN

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-458

STEP 5. Check connector A-43 at the crankshaft position 
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 20.

AK200494

1

2

3

A-43(B)

AB

CONNECTOR: A-43

HARNESS 
CONNECTOR: 
COMPONENT SIDE

CRANKSHAFT
POSITION
SENSOR

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-459

STEP 6. Measure the sensor supply voltage at crankshaft 
position sensor harness side connector A-43.
(1) Disconnect the connector A-43 and measure at the harness 

side.

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

(3) Measure the voltage between terminal No. 2 and ground.

• Voltage should be between 4.8 and 5.2 volts

(4) 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 11.
NO :  Go to Step 7.

AK200494

1

2

3

A-43(B)

AB

CONNECTOR: A-43

HARNESS 
CONNECTOR: 
COMPONENT SIDE

CRANKSHAFT
POSITION
SENSOR

AKX01416 AO

2 1

3

A-43 HARNESS CONNECTOR: 
COMPONENT SIDE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-460

STEP 7. Measure the sensor supply voltage at PCM 
connector C-90 by backprobing.
(1) Do not disconnect the PCM connector C-90.
(2) Disconnect the crankshaft position sensor connector A-43.
(3) Turn the ignition switch to the "ON" position.

(4) Measure the voltage between terminal No. 45 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 8.
NO :  Go to Step 9.

STEP 8. Check connector C-90 at PCM for damage.
Q: Is the connector in good condition?

YES : Repair it because of open circuit between crankshaft 

position sensor connector A-43 (terminal No. 2) and 
PCM connector C-90 (terminal No. 45). Then go to 
Step 20.

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

Connector Inspection 

P.00E-2

. Then go to Step 20.

AK103762

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53

54

55

56

57

46 45 44

58

59

60

61

62

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64

65

66

47

41

AB

CONNECTOR: C-90

C-90(GR)

HARNESS CONNECTOR:
COMPONENT SIDE

AKX01544

AKX01544

41

AG

C-90 HARNESS CONNECTOR: 
HARNESS SIDE

42 43

44 45 46

47 48 49 50 51 52 53 54 55 56 57

58 59

60 61 62 63

64 65 66

AK103762

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53

54

55

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57

46 45 44

58

59

60

61

62

63

64

65

66

47

41

AB

CONNECTOR: C-90

C-90(GR)

HARNESS CONNECTOR:
COMPONENT SIDE