Mitsubishi Outlander GS45X. Manual - part 659

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-459

STEP 7. Check harness connector D-19 at the fuel tank 
differential pressure sensor for damage.
Q: Is the connector in good condition?

YES : Repair harness wire between fuel tank differential 

pressure sensor connector D-19 (terminal No. 3) and 
ECM connector B-11 (terminal No. 114) because of 
open circuit. 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.

STEP 8. Check harness connector D-19 at the fuel tank 
differential pressure sensor and connector B-11 at ECM for 
damage.
Q: Is the harness connector in good condition?

YES : Go to Step 9.
NO :  Repair or replace it. Refer to GROUP 00E, Harness 

Connector Inspection 

P.00E-2

. Then go to Step 12.

STEP 9. Measure the sensor output voltage at ECM 
connector B-11 by using power plant ECU 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 No. 112 and ground.

• Voltage should be between 1.5 and 3.5 volts.

(5) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the measured voltage normal?

YES : Go to Step 11.
NO :  Go to Step 10.

AK604171

ECM

AB

Body side harness 

MB992110

82 81 80 79 78 77 76 75 74 73 72 71

94 93 92 91 90 89 88 87 86 85 84 83

99 98 97 96 95

100

101

102

103

104

105

106

112

113

114

109 108

107

110

111

115

116

117

118

AK704398 AB

Power plant ECU
check harness connector

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-460

STEP 10. Check for open or short circuit to ground 
between fuel tank differential pressure sensor connector 
D-19 (terminal No. 1) and ECM connector B-11 (terminal 
No. 112).
Q: Is the harness wire in good condition?

YES : Replace the fuel tank differential pressure sensor. 

Then go to Step 12.

NO :  Repair it. Then go to Step 12.

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

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MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

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STEP 11. Using scan tool MB991958, check data list item 
52: Fuel Tank Differential Pressure 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) Disconnect hose D from the evaporative emission canister, 

and plug the hose.

(3) Turn the ignition switch to the "ON" position.
(4) Remove the fuel cap.
(5) Set scan tool MB991958 to the data reading mode for item 

52, Fuel Tank Differential Pressure Sensor.

• Output voltage should be between 1,500 to 3,500 mV.

(6) Connect the evaporative emission system pressure pump 

(Miller number 6872A) to the fuel tank filler tube by using 
fuel tank adapter (MLR-8382) and pressurize the fuel tank.

• The fuel tank pressure reading should increase.

(7) Turn the ignition switch to the "LOCK" (OFF) position. Then 

disconnect scan tool MB991958.

(8) Remove the evaporative emission system pressure pump 

(Miller number 6872A) and the fuel tank adapter 
(MLR-8382), and reinstall the fuel cap.

(9) Connect hose D to the evaporative emission canister.
Q: Is the sensor operating properly?

YES : It can be assumed that this malfunction is intermittent. 

Refer to GROUP 00, How to Use 
Troubleshooting/Intermittent Malfunctions 

P.00-15

.

NO :  Replace the ECM. When the ECM is replaced, 

register the ID code. Refer to GROUP 42B, Diagnosis 
− ID Code Registration Judgment Table <Vehicles 

with KOS> 

P.42B-15

 or GROUP 42C, Diagnosis 

− ID 

AK700568AB

MB991824

MB991827

MB991910

Data link
connector

AK704159

Hose D

Plug

AC

AK704160

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

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MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

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Code Registration Judgment Table <Vehicles with 
WCM> 

P.42C-10

. Then go to Step 12.

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

Diagnostic Function 

− OBD-II Drive Cycle − Pattern 23 

P.13A-11

.

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

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

DTC P0453: Evaporative Emission Control System Pressure Sensor High Input

AK901208

AB

K

A

B

C

E

G

F

H

I

J

Air filter

D

Chamber

System diagram

Intake manifold

Evaporative emission
purge solenoid

Fuel tank

Evaporative
emission canister

Fuel tank differential
pressure sensor

Vent pipe

Evaporative emission
ventilation solenoid