Mitsubishi Montero Sport (2004+). Manual - part 249

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-409

STEP 6. Measure the sensor supply voltage at fuel tank 
temperature sensor harness side connector E-30.
(1) Disconnect the connector E-30 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.

STEP 7. Check connector C-90 at PCM for damage.
Q: Is the connector in good condition?

YES : Replace the PCM. Then go to Step 12.
NO :  Repair or replace it. Refer to GROUP 00E, Harness 

Connector Inspection 

P.00E-2

. Then go to Step 12.

AK200019

3 2 1

CONNECTOR: E-30

AB

HARNESS
CONNECTOR: 
COMPONENT 
SIDE

E-30

3 2

AK000574

1

E-30 HARNESS 
CONNECTOR: 
COMPONENT SIDE

AD

AK103762

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AB

CONNECTOR: C-90

C-90(GR)

HARNESS CONNECTOR:
COMPONENT SIDE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-410

STEP 8. Check for continuity at fuel tank temperature 
sensor harness side connector E-30.
(1) Disconnect the connector E-30 and measure at the harness 

side.

(2) Check for the continuity between terminal No. 3 and 

ground.

• Should be less than 2 ohms.

Q: Does continuity exist?

YES : Go to Step 9.
NO :  Check connector E-44 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 fuel tank 
temperature sensor connector E-30 (terminal No. 3) 
and ground because of open circuit or harness 
damage. Then go to Step 12.

STEP 9. Check the fuel tank temperature sensor.
(1) Disconnect the fuel tank temperature sensor connector 

E-30.

(2) Measure the resistance between terminal No. 1 and No. 3 

of the fuel tank temperature sensor.

Standard value:

0.5 

− 12.0 kΩ

Q: Is the resistance between 0.5 and 12.0 k

Ω?

YES : Go to Step 10.
NO :  Replace the fuel tank temperature sensor. Then go to 

Step 12.

AK200019

3 2 1

CONNECTOR: E-30

AB

HARNESS
CONNECTOR: 
COMPONENT 
SIDE

E-30

AK000575

3 2 1

E-30 HARNESS 
CONNECTOR: 
COMPONENT SIDE

AD

AK200019

3 2 1

CONNECTOR: E-30

AB

HARNESS
CONNECTOR: 
COMPONENT 
SIDE

E-30

AK000576

3

1 2

FUEL TANK TEMPERATURE
SENSOR CONNECTOR

AC

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-411

STEP 10. Check connector C-90 at PCM for damage.
Q: Is the connector in good condition?

YES : Go to Step 11.
NO :  Repair or replace it. Refer to GROUP 00E, Harness 

Connector Inspection 

P.00E-2

. Then go to Step 12.

STEP 11. Check for harness damage between fuel tank 
temperature sensor connector E-30 (terminal No. 1) and 
PCM connector C-90 (terminal No. 51).

NOTE: Check harness after checking intermediate connector 
C-85 and E-44. If intermediate connectors are damaged, repair 
or replace them. Refer to GROUP 00E, Harness Connector 
Inspection 

P.00E-2

. Then go to Step 12.

Q: Is the harness wire in good condition?

YES : Replace the PCM. Then go to Step 12.
NO :  Repair it. Then go to Step 12.

AK103762

42

43

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51

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54

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57

46 45 44

58

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60

61

62

63

64

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66

47

41

AB

CONNECTOR: C-90

C-90(GR)

HARNESS CONNECTOR:
COMPONENT SIDE

AK200019

3 2 1

CONNECTOR: E-30

AB

HARNESS
CONNECTOR: 
COMPONENT 
SIDE

E-30

AK103762

42

43

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46 45 44

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61

62

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66

47

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AB

CONNECTOR: C-90

C-90(GR)

HARNESS CONNECTOR:
COMPONENT SIDE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-412

STEP 12. Test the OBD-II drive cycle.
(1) Carry out a test drive with the drive cycle pattern. Refer to 

Diagnostic Function 

− OBD-II Drive Cycle − Procedure 6 − 

Other Monitor 

P.13A-4

.

(2) Check the diagnostic trouble code (DTC).
Q: Is DTC P0181 set?

YES : Repeat the troubleshooting.
NO :  The procedure is complete.