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Mitsubishi Outlander GS45X. Manual - part 698

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-615

DTC SET CONDITIONS

Logic Flow Chart

Check Condition, Judgement Criterion

• When the fuel consumption calculated from the

operation time of the injector amounts to 30 litters
(7.9 gal), the diversity of the amount of fuel in
tank calculated from the fuel level sensor is 2 lit-
ters (0.5 gal) or less.

OBD-II DRIVE CYCLE PATTERN

None.

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

• Fuel pump module or fuel level sensor (sub)

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

AK604341

Good

Malfunction

End

Indicated fuel level

change < 2L (0.5gal)

Reset fuel consumption accumulator

Start

Yes

Monitoring
conditions

Accumulate fuel consumption

through fuel injectors

Accumulated fuel consumption

will not reset when key-off/on.

Accumulated fuel >= specified

consumption value

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

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MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-616

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 DTC P0461 set?

YES : Go to Step 2.
NO : Go to Step 4.

STEP 2. Check fuel gauge.
Q: Is the fuel gauge functioning?

YES : Go to Step 3.
NO : Refer to GROUP 54A, Combination Meter

− Trouble

Symptom Chart

P.54A-69

STEP 3. Check the trouble symptoms.
Check that the fuel gauge operates correctly.
Q: Does the fuel gauge operates correctly?

YES : 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

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

. Then go to Step 6.

AK700568AB

MB991824

MB991827

MB991910

Data link
connector

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

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MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-617

STEP 4. Check the fuel level sensor (sub).
Check to see if the fuel level sensor is normal. Refer to GROUP
54A, Combination Meter

− On-vehicle Service − Fuel Gauge

Unit Check

P.54A-107

Q: Is the fuel level sensor (sub) normal?

YES : Go to Step 5.
NO : Replace the fuel level sensor (sub). Then go to Step

STEP 5. Check the trouble symptoms.
Check that the fuel gauge operates correctly.
Q: Does the fuel gauge operates correctly?

YES : 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

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

. Then go to Step 6.

STEP 6. Check the trouble symptoms.
Check that the fuel gauge operates correctly.
Q: Does the fuel gauge operates correctly?

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

DTC P2096: Post Catalyst Fuel Trim System too Lean

TECHNICAL DESCRIPTION

• The ECM effects air/fuel ratio feedback control in

accordance with the signals from the linear
air-fuel ratio sensor.

• If the linear air-fuel ratio sensor has deteriorated,

corrections will be made by the heated oxygen
sensor (rear).

DESCRIPTIONS OF MONITOR METHODS

• When an abnormality exists in the linear air-fuel

ratio sensor, the amount of compensated fuel
injection is abnormal. When this situation contin-
ues, it is judged to be faulty.

• If an abnormality exists in the heated oxygen sen-

sor (rear), also it is judged to be faulty even
though the linear air-fuel ratio sensor is normal.

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 monitor

• Heated oxygen sensor (rear) monitor

• Linear air-fuel ratio sensor heater monitor

• Heated oxygen sensor (rear) heater monitor

• Heated oxygen sensor offset voltage monitor

• Misfire monitor

• Fuel system monitor

Sensor (The sensor below is determined to be

normal)

• Mass airflow sensor

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

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MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-618

• Engine coolant temperature sensor

• Intake air temperature sensor

• Barometric pressure sensor

• Throttle position sensor

• Accelerator pedal position sensor

DTC SET CONDITIONS

Logic Flow Chart

Check Conditions

• Engine coolant temperature is more than 76°C

(169

°F).

• The closed loop air/fuel control continues for

more than 10 seconds.

• More than 90 seconds have passed since the

engine starting sequence was completed.

• Mass airflow sensor output is more than 8 g/sec.

• After the engine start, the accumulated time

where the four conditions mentioned above are
satisfied is more than 60 seconds.

AKA00454

End

Malfunction

TAF <= TAFmin

TAF >= TAFmax

TAF: Fuel trim based on heated oxygen sensor (rear)
TAFmin: Minimum limit of TAF
TAFmax: Maximum limit of TAF

Good

Start

Yes

Continuous
failure for 5secs

Monitoring
conditions

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