Mitsubishi Outlander GS45X. Manual — part 690

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-583

STEP 14. 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) After the DTC has been deleted, read the DTC again.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is DTC P0657 set?

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

DTC P1231: Active Stability Control Plausibility

.

TECHNICAL DESCRIPTION

• Checks for an abnormal signal of active stability

control (ASC) via the CAN communication.

.

DTC SET CONDITIONS

Check Condition

• Ignition switch is "ON" position.

Judgment Criterion

• A torque demand signal from the active stability

control is abnormal.

.

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

• Active stability control 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

AK700568AB

MB991824

MB991827

MB991910

Data link
connector

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-584

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 DTC P1231 set?

YES : Go to Step 2.
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 2. Using scan tool MB991958, read the diagnostic
trouble code (DTC).
(1) Turn the ignition switch to the "ON" position.
(2) After the DTC has been deleted, read the ASC-DTC.
(3) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the ASC-DTC set?

YES : Refer to GROUP 35C, Diagnosis

− Diagnostic

Trouble Code Chart

P.35C-18

.

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

Codes Registration Judgment Table <Vehicles with
WCM>

P.42C-10

.

DTC P1238: Mass Airflow Sensor Plausibility (Torque Monitor)

.

TECHNICAL DESCRIPTION

Compare the actual measurement of volumetric effi-
ciency by a mass airflow sensor signal with volumet-
ric efficiency estimated from a throttle position
sensor (main or sub) signal.

.

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

AK700568AB

MB991824

MB991827

MB991910

Data link
connector

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-585

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 percent or
more. Or, the volumetric efficiency is 60 percent
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 percent or more.

Check Conditions

• The difference between the actual volumetric effi-

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

AK604354

Start

Yes

Yes

Yes

No

No

No

Continuous failure

for 0.5sec

Malfunction

End

Good

Monitoring
conditions

|Ec-calculated Ec|
> 35 percent

Ec: load value

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-586

• 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 percent or more.

.

OBD-II DRIVE CYCLE PATTERN

Refer to Diagnostic Function

− OBD-II Drive Cycle

Pattern 17

P.13A-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.13A-49

.

NO : Go to Step 2.

AK700568AB

MB991824

MB991827

MB991910

Data link
connector