Mitsubishi Outlander GS45X. Manual - part 798

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-125

DIAGNOSIS

Required Special Tools:

• MB991958: Scan Tool (M.U.T.-III Sub Assembly)

• MB991824: V.C.I.

• MB991827: USB Cable

• MB991910: Main Harness A

STEP 1. 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) Read the DTC.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the diagnostic trouble code other than P0068 set?

YES : Refer to Diagnostic Trouble Code Chart 

P.13B-50

.

NO :  Go to Step 2. 

STEP 2. Check for intake system vacuum leak.
Q: Are there any abnormalities?

YES : Repair it. Then go to Step 6.
NO :  Go to Step 3.

STEP 3. Check for foreign matter being around the mass 
airflow sensor.
Q: Are there any foreign matter?

YES : Repair it. Then go to Step 6.
NO :  Go to Step 4.

AK700568AB

MB991824

MB991827

MB991910

Data link
connector

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-126

STEP 4. Using scan tool MB991958, check data list item 10: 
Mass Airflow Sensor.
(1) Start the engine and run at idle.
(2) Set scan tool MB991958 to the data reading mode for item 

10, Mass Airflow Sensor.

(3) Warm up the engine to normal operating temperature: 80

°C 

to 95

°C (176°F to 203°F).

• The standard value during idling should be between 

1,350 and 1,670 millivolts.

• When the engine is revved, the mass airflow rate should 

increase according to the increase in engine speed.

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

YES : Go to Step 5.
NO :  Refer to DTC P0101 

− Mass Airflow Circuit 

Range/Performance Problem 

P.13B-132

, DTC P0102 

− Mass Airflow Circuit Low Input 

P.13B-139

, DTC 

P0103 

− Mass Airflow Circuit High Input 

P.13B-145

.

STEP 5. Check the trouble symptoms.
(1) Carry out a test drive with the drive cycle pattern. Refer to 

Diagnostic Function 

− OBD-II Drive Cycle Pattern 17 

P.13B-11

.

(2) Check the diagnostic trouble code (DTC).
Q: Is DTC P0068 set?

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

register the ID code. Refer to GROUP 42B, Diagnosis 
− ID Codes 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 6.

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

. 

STEP 6. 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 Pattern 17 

P.13B-11

.

(2) Check the diagnostic trouble code (DTC).
Q: Is DTC P0068 set?

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

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-127

DTC P0069: Abnormal Correlation Between Manifold Absolute Pressure Sensor And Barometric 
Pressure Sensor

.

TECHNICAL DESCRIPTION

• The ECM detects abnormality in the sensor by 

comparing the manifold absolute pressure sensor 
output with the barometric pressure sensor out-
put.

.

DESCRIPTIONS OF MONITOR METHODS

The ECM compares the manifold absolute pressure 

sensor output with the barometric pressure sen-
sor output while the engine control relay is in 
"ON" position after the ignition switch is in 
"LOCK" (OFF) position. When the difference 
exceeds the specified value between them, the 
ECM determines whether the manifold absolute 
pressure sensor / the barometric pressure sensor 
has malfunction or not.

.

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)

• Engine coolant temperature sensor

• Manifold absolute pressure sensor

.

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

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MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-128

DTC SET CONDITION

Logic Flow Chart

.

Check Conditions

• Ignition switch is in "LOCK" (OFF) position.

• After 2 seconds pass from the time when the 

engine is stopped.

• Engine coolant temperature is higher than 0°C 

(32

°F).

Judgement Criterion

• Difference between manifold absolute pressure 

sensor output and barometric pressure sensor 
output is more than 9 kPa (2.7 in.Hg) for 2 sec-
onds.

.

OBD-II DRIVE CYCLE PATTERN

None.

.

TROUBLESHOOTING HINTS (The most 
likely causes for this code to be set are: )

• Manifold absolute pressure sensor failed.

• Barometric pressure sensor failed.

• ECM failed.

No

No

No

|Barometric pressure-

manifold pressure| > 9kPa

(2.7 in. Hg)

Malfunction

End

Good

AK704095

Start

Yes

Yes

Yes

Continuous
failure for 2secs

Monitoring
conditions