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Mitsubishi Outlander GS45X. Manual - part 926

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-637

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)

• Not applicable

DTC SET CONDITIONS

Check Conditions

• The difference between the actual volumetric effi-

ciency and the volumetric efficiency estimated by
the throttle position sensor (main) is 0 % or more.
Or, the volumetric efficiency is 60 % or less.

• Engine speed is 750 r/min or higher.

Judgment Criterion

• For 0.5 second, the difference between the actual

volumetric efficiency and the volumetric efficiency
estimated by the throttle position sensor (main) is
35 % or more.

AK604351

Start

Yes

Continuous failure

for specified time

Malfunction

End

Good

Monitoring
conditions

|Ec-calculated Ec|
> specified value

Ec: load value

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-638

Check Condition

• The difference between the actual volumetric effi-

ciency and the volumetric efficiency estimated by
the throttle position sensor (sub) is 0% or more.
Or, the volumetric efficiency is 60% or less.

• Engine speed is 750 r/min or higher.

Judgment Criterion

• For 0.5 second, the difference between the actual

volumetric efficiency and the volumetric efficiency
estimated by the throttle position sensor (sub) is
35 % or more.

OBD-II DRIVE CYCLE PATTERN

Refer to Diagnostic Function

− OBD-II Drive Cycle

Pattern 17

P.13B-11

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

• Mass airflow sensor system failed.

• ECM failed.

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 P1238 set?

YES : Refer to Diagnostic Trouble Code Chart

P.13B-50

NO : Go to Step 2.

AK700568AB

MB991824

MB991827

MB991910

Data link
connector

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-639

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.13B-132

, DTC P0102

− Mass Airflow Circuit Low Input

P.13B-139

, DTC

P0103

− Mass Airflow Circuit High Input

P.13B-145

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.13B-11

(2) Check the diagnostic trouble code (DTC).
Q: Is DTC P1238 set?

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

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.13B-11

(2) Check the diagnostic trouble code (DTC).
Q: Is DTC P1238 set?

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

Next>>

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-640

13B

DTC P1240: Ignition Angle

TECHNICAL DESCRIPTION

Checks for an abnormal ignition timing retard angle
demand signal from the active stability control (ASC).

DTC SET CONDITIONS

Check Condition

• Ignition switch is "ON" position.

Judgment Criterion

• The ignition timing retard angle demand signal is

not normal.

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

• ECM failed.

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

YES : Refer to GROUP 35C, ASC Diagnosis

− Diagnosis

Code Chart

P.35C-18

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

with KOS>

P.42B-15

or GROUP 42C, Diagnosis

− ID

Codes Registration Judgment Table <Vehicles with
WCM>

P.42C-10

AK700568AB

MB991824

MB991827

MB991910

Data link
connector

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