Mitsubishi Galant (2004+). Manual — part 1004

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-833

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CIRCUIT OPERATION

• The fuel level sensor (sub) drive signal is input in

combination meter (terminal No. 13).

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TECHNICAL DESCRIPTION

• Branch the drive signal from the fuel level sensor

circuit, and input it into combination meter.

• The combination meter detects the amount of

fuel left in the fuel tank with this signal, and also
controls the fuel level warning light.

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DESCRIPTIONS OF MONITOR METHODS
Detect malfunction if change of fuel level sensor out-

put voltage is small when sum of fuel injection is
large.

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MONITOR EXECUTION
Continuous

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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

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AK303838AB

C-25

CONNECTOR: C-25

AK303085

CONNECTOR: B-20

PCM

AB

AIR CLEANER

B-20

AK303877AB

C-28

CONNECTOR: C-28

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-834

DTC SET CONDITIONS

Logic Flow Chart

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INDICATED

FUEL LEVEL CHANGE

< 2L (0.5gal)

ACCUMULATE FUEL CONSUMPTION

THROUGH FUEL INJECTORS.

ACCUMULATED FUEL
CONSUMPTION WILL NOT
RESET WHEN KEY-OFF/ON.

ACCUMULATED

FUEL CONSUMPTION

> =SPECIFIED VALVE

START

END

NO

NO

NO

YES

YES

YES

MALFUNCTION

GOOD

MONITORING

CONDITIONS

RESET ACCUMULATE

FUEL CONSUMPTION.

AK302040

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-835

Check Conditions, Judgement Criteria

• When the fuel consumption calculated from the

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

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OBD-II DRIVE CYCLE PATTERN
Refer to Diagnostic Function

− OBD-II Drive Cycle −

Procedure 6

− Other Monitor

P.13A-5

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

• Fuel pump module or fuel level sensor (sub)

failed.

• PCM failed.

DIAGNOSIS

Required Special Tools:

• MB991958: Scan tool (MUT-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 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, Chassis Electrical

−

Combination Meters Assembly and Vehicle Speed
Sensor

− Symptom Chart

P.54A-77

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AK303804AB

MB991910

DATA LINK
CONNECTOR

MB991824

MB991827

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-836

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 − Procedure 6 −

Other Monitor

P.13A-5

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(2) Check the diagnostic trouble code (DTC).
Q: Is DTC P2066 set?

YES : Replace the PCM. Then go to Step 6.
NO : It can be assumed that this malfunction is intermittent.

Refer to GROUP 00, How to Use
Troubleshooting/Inspection Service Points

P.00-6

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STEP 4. Check the fuel level sensor (sub).

Check to see if the fuel level sensor is normal. Refer to GROUP
54A, Chassis Electrical

− Combination Meters Assembly and

Vehicle Speed Sensor

− On-Vehicle Service − Fuel Level Sen-

sor Check

P.54A-108

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

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

6.

STEP 5. Check the trouble symptoms.
(1) Carry out a test drive with the drive cycle pattern. Refer to

Diagnostic Function

− OBD-II Drive Cycle − Procedure 6 −

Other Monitor

P.13A-5

.

(2) Check the diagnostic trouble code (DTC).
Q: Is DTC P2066 set?

YES : Replace the PCM. Then go to Step 6.
NO : It can be assumed that this malfunction is intermittent.

Refer to GROUP 00, How to Use
Troubleshooting/Inspection Service Points

P.00-6

.

STEP 6. 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 − Procedure 6 −

Other Monitor

P.13A-5

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(2) Check the diagnostic trouble code (DTC).
Q: Is DTC P2066 set?

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