Mitsubishi Outlander GS45X. Manual - part 574

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-119

STEP 2. Using scan tool MB991958, check data list item 8: 
Manifold Absolute Pressure Sensor.
(1) Turn the ignition switch to the "ON" position.
(2) Set scan tool MB991958 to the data reading mode for item 

8, Manifold Absolute Pressure Sensor.

• When altitude is 0 m (0 foot), 101 kPa (29.8 in.Hg).

• When altitude is 600 m (1,969 feet), 95 kPa (28.1 in.Hg).

• When altitude is 1,200 m (3,937 feet), 88 kPa (26.0 

in.Hg).

• When altitude is 1,800 m (5,906 feet), 81 kPa (23.9 

in.Hg).

(3) Start the engine.

• When the engine is idling, 16 − 36 kPa (4.7 − 10.6 

in.Hg).

• When the engine is suddenly revved, manifold absolute 

pressure varies.

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

YES : Go to Step 3.
NO :  Refer to, DTC P0106 

− Manifold Absolute Pressure 

Circuit Range/Performance Problem 

P.13A-139

, DTC 

P0107 

− Manifold Absolute Pressure Circuit Low 

Input 

P.13A-148

, DTC P0108 

− Manifold Absolute 

Pressure Circuit High Input 

P.13A-156

.

STEP 3. Using scan tool MB991958, read the diagnostic 
trouble code (DTC).
(1) Turn the ignition switch to the "ON" position.
(2) Erase the DTC.
(3) Start the engine.
(4) Turn the ignition switch to "LOCK" (OFF) position and then 

wait 2 seconds.

(5) Turn the ignition switch to the "ON" position.
(6) Set scan tool MB991958, read the DTC.
(7) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is DTC P0069 set?

YES : 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 

Codes Registration Judgment Table <Vehicles with 
WCM> 

P.42C-10

. Then go to Step 4.

NO :  It can be assumed that this malfunction is intermittent. 

Refer to GROUP 00, How to Use 
Troubleshooting/Inspection Service Points 

− How to 

Cope with Intermittent Malfunctions 

P.00-15

.

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-120

STEP 4. Using scan tool MB991958, read the diagnostic 
trouble code (DTC).
(1) Turn the ignition switch to the "ON" position.
(2) Erase the DTC.
(3) Start the engine.
(4) Turn the ignition switch to "LOCK" (OFF) position and then 

wait 2 seconds.

(5) Turn the ignition switch to the "ON" position.
(6) Set scan tool MB991958, read the DTC.
(7) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is DTC P0069 set?

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

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-121

DTC P0101: Mass Airflow Circuit Range/Performance Problem

AK604114

71 72 73 74 75 76 77 78 79 80 81 82

83 84 85 86 87 88 89 90 91 92 93 94

95 96 97 98 99

100 101 102 103 104

112 113 114

109

108

107

110 111

115 116

106

105

118

117

1

3

2

4

3 4

2

1

AC

MASS AIRFLOW SENSOR CIRCUIT

MASS AIRFLOW SENSOR

87

88

3

2

HEAT
SENSITIZING
RESISTANCE

BLUE

A-07

(MU805110)

4

20A

WHITE

WHITE

WHITE

A-33X

4

3

1

2

22

B-11

36

FUSIBLE LINK

OFF

ON

RELAY BOX
(ENGINE COMPARTMENT)

ENGINE
CONTROL
MODULE

TO ECM

MFI
RELAY

BLA

CK-WHITE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-122

.

CIRCUIT OPERATION

• The mass airflow sensor power is supplied from 

the MFI relay (terminal No. 2), and the ground is 
provided on the ECM (terminal No. 88).

• A voltage that is according to the mass airflow 

rate is sent to the ECM (terminal No. 87) from the 
mass airflow sensor output terminal (terminal No. 
3).

.

TECHNICAL DESCRIPTION

• While the engine is running, the mass airflow 

sensor outputs electric current which corre-
sponds to the mass airflow rate.

• The ECM converts the electric current into the 

voltage and checks whether the voltage is within 
a specified range while the engine is running.

.

DESCRIPTIONS OF MONITOR METHODS

Compare load value with mass airflow sensor output 

voltage.

.

MONITOR EXECUTION

Continuous

.

MONITOR EXECUTION CONDITIONS 
(Other monitor and Sensor)

Other Monitor (There is no temporary DTC stored 

in memory for the item monitored below)

• Not applicable

Sensor (The sensor below is determined to be 

normal)

• Throttle position sensor

.

AK704096

AB

Air cleaner
assembly

Mass airflow sensor

Connector: A-07

A-07 (GR)

AK704088

MFI relay

AB

Connector: A-33X

A-33X

AK704097AB

Connector: B-11

B-11 (GR)