Mitsubishi Montero (2004+). Manual - part 244

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-463

STEP 1. Check harness connector B-09 at the knock 
sensor for damage.
Q: Is the harness 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.

AK200961

1

2

CONNECTOR: B-09

B-09(GR)

KNOCK
SENSOR

AB

HARNESS 
CONNECTOR: 
COMPONENT SIDE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-464

STEP 2. Check the continuity at knock sensor harness 
side connector B-09.
(1) Disconnect the connector B-09 and measure at the harness 

side.

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

ground.

• Should be less than 2 ohms.

Q: Does continuity exist?

YES : Go to Step 3.
NO :  Repair an open circuit or harness damage between 

knock sensor connector B-09 (terminal No. 2) and 
ground. Then go to Step 6.

STEP 3. Check harness connector D-134 at PCM for 
damage.
Q: Is the harness 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 6.

AK200961

1

2

CONNECTOR: B-09

B-09(GR)

KNOCK
SENSOR

AB

HARNESS 
CONNECTOR: 
COMPONENT SIDE

AKX01415AN

B-09 HARNESS 
CONNECTOR: 
COMPONENT SIDE

1

2

AK201166

61

62

63

64

65

66

67

68

69

70

71

76

77

78

79

85

86

87

80

72

73

74

75

81

82

83

84

88

89

CONNECTOR: D-134

AB

PCM

D-134(GR)

HARNESS CONNECTOR: 
COMPONENT SIDE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-465

STEP 4. Check for open circuit, short circuit to ground and 
harness damage between knock sensor connector B-09 
(terminal No. 1) and PCM connector D-134 (terminal No. 
89).
Q: Is the harness wire in good condition?

YES : Go to Step 5.
NO :  Repair it. Then go to Step 6.

AK200961

1

2

CONNECTOR: B-09

B-09(GR)

KNOCK
SENSOR

AB

HARNESS 
CONNECTOR: 
COMPONENT SIDE

AK201166

61

62

63

64

65

66

67

68

69

70

71

76

77

78

79

85

86

87

80

72

73

74

75

81

82

83

84

88

89

CONNECTOR: D-134

AB

PCM

D-134(GR)

HARNESS CONNECTOR: 
COMPONENT SIDE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-466

STEP 5. Check the knock sensor.
(1) Disconnect the knock sensor connector B-09.
(2) Start the engine and run at idle.
(3) Measure the voltage between knock sensor side connector 

terminal No. 1 (output) and No. 2 (ground).

(4) Gradually increase the engine speed.

• The voltage increases with the increase in the engine 

speed.

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

YES : Replace the PCM. Then go to Step 6.
NO :  Replace the knock sensor. Then go to Step 6.

STEP 6. Using scan tool MB991958, read the diagnostic 
trouble code (DTC).

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) Erase the DTC.
(4) Test drive under the following conditions:

• Engine speed: 3000 − 5000r/min

• Engine load: 40% or more

• Drive a minimum of 3 seconds after the above condi-

tions have been met.

(5) After completing the test drive, read the DTC.Turn the 

ignition switch to the "LOCK" (OFF) position.

Q: Is DTC P0325 set?

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

AK200961

1

2

CONNECTOR: B-09

B-09(GR)

KNOCK
SENSOR

AB

HARNESS 
CONNECTOR: 
COMPONENT SIDE

AK302970

AB

MB991911

MB991824

MB991827