Mitsubishi Outlander GS45X. Manual — part 573

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-115

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.13A-49

.

NO : Go to Step 2.

STEP 2. 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 3.
NO : Refer to, DTC P0101

− Mass Airflow Circuit

Range/Performance Problem

P.13A-121

, DTC P0102

− Mass Airflow Circuit Low Input

P.13A-127

, DTC

P0103

− Mass Airflow Circuit High Input

P.13A-134

.

AK700568AB

MB991824

MB991827

MB991910

Data link
connector

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-116

STEP 3. 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.13A-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 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

.

STEP 4. 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.13A-11

.

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

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

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

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-117

DTC SET CONDITIONS
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

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-118

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) Set scan tool MB991958, read the DTC.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the diagnostic trouble code other than P0069 set?

YES : Refer to, Diagnostic Trouble Code Chart

P.13A-49

.

NO : Go to Step 2.

AK700568AB

MB991824

MB991827

MB991910

Data link
connector