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Mitsubishi Outlander GS45X. Manual - part 599

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

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MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-219

DESCRIPTIONS OF MONITOR METHODS

• If the air-fuel ratio detection signal has an abnor-

mality although the linear air-fuel ratio sensor is
sufficiently ready to operate, the DTC is stored as
a malfunction.

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)

• Linear air-fuel ratio sensor heater monitor

• Misfire monitor

• Fuel system monitor

Sensor (The sensor below is determined to be

normal)

• Mass airflow sensor

• Engine coolant temperature sensor

• Intake air temperature sensor

• Barometric pressure sensor

• Throttle position sensor

• Accelerator pedal position sensor

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

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MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-220

DTC SET CONDITIONS
Logic Flow Chart

Check Conditions

• Battery positive voltage is between 10 and 16.5

volts.

• More than 220 seconds have passed since the

engine starting sequence was completed.

Judgement Criteria

• The negative circuit voltage subtracted from the

pumping circuit voltage is be lower than

−2.1

volts or higher than 2.3 volts for 12 seconds.

• The pumping current is be lower than 0 milli

ampere or higher than 0 milli ampere for 12 sec-
onds.

OBD-II DRIVE CYCLE PATTERN

• Refer to Diagnostic Function − OBD-II Drive

Cycle

− Pattern 22

P.13A-11

End

Malfunction

(Positive circuit continuity)

Malfunction

(Circuit over voltage)

Good

Voltage diff*

> 2.3 V or < -2.1 V

*: Pumping circuit voltage
- Negative circuit voltage

AK900360

Start

Yes

Pumping current

= 0 mA

Yes

Continuous failure

for 2secs?

Continuous failure

for 12secs?

Monitoring
conditions

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

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MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-221

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

• Linear air-fuel ratio sensor failed.

• Connector damage.

• 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. Check harness connector C-142 at linear air-fuel
ratio sensor and harness connector B-10 at ECM for
damage.
Q: Is the harness connector in good condition?

YES : Go to Step 2.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection

P.00E-2

. Then go to Step 4.

STEP 2. Test the OBD-II drive cycle.

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 and delete the

DTC.

(3) Carry out the test drive with the drive cycle pattern. Refer to

Diagnostic Function

− OBD-II Drive Cycle − Pattern 22

P.13A-11

(4) Check the diagnostic trouble code (DTC).
Q: Is DTC P0130 set?

YES : Then go to Step 3.
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

AK700568AB

MB991824

MB991827

MB991910

Data link
connector

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

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MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

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STEP 3. Replace the linear air-fuel ratio sensor.
(1) Replace the linear air-fuel ratio sensor.
(2) Carry out a test drive with the drive cycle pattern. Refer to

Diagnostic Function

− OBD-II Drive Cycle − Pattern 22

P.13A-11

(3) Check the diagnostic trouble code (DTC).
Q: Is DTC P0130 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.