Mitsubishi Outlander GS45X. Manual - part 897

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-521

STEP 2. Check harness connector B-11 at ECM and 
harness connector D-19 at fuel tank differential pressure 
sensor for damage.
Q: Is the harness connector in good condition?

YES : Then go to Step 3 .
NO :  Repair or replace it. Refer to GROUP 00E, Harness 

Connector Inspection 

P.00E-2

. Then go to Step 8 .

STEP 3. Measure the 5-volt reference signal at fuel tank 
differential pressure sensor connector D-19. 
(1) Remove the second seat assembly (Refer to GROUP 52A, 

Second Seat Assembly 

P.52A-25

).

(2) Remove the floor inspection lid (LH).
(3) Disconnect fuel tank differential pressure sensor connector 

D-19.

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

(5) Measure the voltage between terminal 3 and ground.

• The voltage should measure between 4.9 and 5.1 volts.

(6) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the measured voltage between 4.9 and 5.1 volts?

YES : Go to Step 6 .
NO :  Go to Step 4 .

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Floor inspection lid (LH)

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D-19 Harness
connector:
component side 

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

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MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-522

STEP 4. Measure the 5-volt reference signal at ECM 
connector B-11 by using check harness special tool 
MB992110. 
(1) Disconnect all ECM connectors. Connect the power plant 

ECU check harness special tool MB992110 between the 
separated connectors.

(2) Turn the ignition switch to the "ON" position.
(3) Remove the fuel cap.

(4) Measure the voltage between terminal 114 and ground.

• The voltage should measure between 4.9 and 5.1 volts.

(5) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the measured voltage between 4.9 and 5.1 volts?

YES : Check harness connector C-129 at intermediate 

connector for damage, and repair or replace as 
required. Refer to GROUP 00E, Harness connector 
Inspection 

P.00E-2

. If intermediate connector C-129 

is in good condition, repair it because of harness 
damage fuel tank differential pressure sensor 
connector D-19 (terminal No. 3) and ECM connector 
B-11 (terminal No. 114). Then go to Step 8 .

NO :  Go to Step 5 .

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ECM

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Body side harness 

MB992110

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Special tool 48-pin connector 
component side

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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

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MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-523

STEP 5. Check for short circuit to ground between fuel 
tank differential pressure sensor connector D-19 and ECM 
connector B-11.
(1) Disconnect the connector D-19 and B-11 measure at the 

harness side.

(2) Check for the continuity between connector B-11 (terminal 

No. 114) and ground.

• Not continuity.

Q: Is the harness wire in good condition?

YES : Replace the ECM. When the ECM is replaced, 

register the ID code. Refer to GROUP 42B, ID Code 
Registration Judgment Table <Vehicles with KOS> 

P.42B-15

 or GROUP 42C, ID Code Registration 

Judgment Table <Vehicles with WCM> 

P.42C-10

. 

Then go to Step 8 .

NO :  Check harness connector C-129 at intermediate 

connector for damage, and repair or replace as 
required. Refer to GROUP 00E, Harness connector 
Inspection 

P.00E-2

. If intermediate connector C-129 

is in good condition, repair it because of open circuit 
or harness damage fuel tank differential pressure 
sensor connector D-19 (terminal No. 3) and ECM 
connector B-11 (terminal No. 114). Then go to Step 8 .

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B-11 Harness connector: 
component side

AB

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

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MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-524

STEP 6. Check for open circuit or short circuit to ground or 
harness damage between fuel tank differential pressure 
sensor connector D-19 and ECM connector B-11.
(1) Disconnect the connector D-19 and B-11 measure at the 

harness side.

(2) Measure the resistance between fuel tank differential 

pressure sensor connector D-19 and the ECM connector 
B-11.

a. Connector D-19 (terminal No. 3) and connector B-11 

(terminal No. 114).

b. Connector D-19 (terminal No. 1) and connector B-11 

(terminal No. 112).

• Should be less than 2 ohms.

(3) Check for the continuity between the ECM connector B-11 

and ground.

a. Connector B-11 (terminal No. 112) and ground
b. Connector B-11 (terminal No. 114) and ground

• Not continuity.

Q: Is the harness connector in good condition?

YES : Then go to Step 7 .
NO :  Repair it. Then go to Step 8 .

STEP 7. Replace the fuel tank differential pressure sensor.
(1) Replace the fuel tank differential pressure sensor.
(2) Carry out test drive with the drive cycle pattern. Refer to 

Diagnostic Function. OBD-II Drive Cycle. Pattern 22 

P.13B-11

.

(3) Check the diagnostic trouble code (DTC).
Q: Is DTC P0452 set?

YES : Replace the ECM. When the ECM is replaced, 

register the ID code. Refer to GROUP 42B, ID Code 
Registration Judgment Table <Vehicles with KOS> 

P.42B-15

 or GROUP 42C, ID Code Registration 

Judgment Table <Vehicles with WCM> 

P.42C-10

. 

Then go to Step 8 .

NO :  The inspection is complete.

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D-19 harness connector:
component side 

B-11 harness connector:
component side 

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B-11 Harness connector: 
component side

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