Mitsubishi Eclipse. Manual — part 213

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

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MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-345

DTC SET CONDITIONS

Logic Flow Chart

.

Check Conditions

• The engine coolant temperature − intake air tem-

perature is 5

°C (9°F) or less when the engine is

started.

• The engine coolant temperature is between

−10°C (14°F) and 36°C (97°F) when the engine is

started.

• Engine coolant temperature sensor is higher than

60

°C (140°F).

• Maximum vehicle speed is higher than 30 km/h

(19 mph) after the starting sequence has been
completed.

Judgement Criteria

• The fuel tank temperature − engine coolant tem-

perature is 15

°C (27°F) or more when the engine

is started.

.

START

NO

YES

YES

YES

YES

NO

NO

NO

END

NO

YES

YES

NO

MALFUNCTION

GOOD

MONITORING

CONDITIONS

“FUEL TEMP. AT

ENGINE START” -

“ENGINE COOLANT TEMP. AT

ENGINE START”

> 15˚C (27˚F)

ENGINE COOLANT TEMP.

> =60˚C (140˚F)

ENGINE COOLANT TEMP.

> =60˚C (140˚F)

MAX.VEHICLE SPEED

> 30km/h (17mph)

MAX.VEHICLE SPEED

> 30km/h (17mph)

AK301444

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

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MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-346

OBD-ll DRIVE CYCLE PATTERN
Refer to Diagnostic Function

− OBD-ll Drive Cycle −

Procedure 6

− Other Monitor

P.13A-5

.

.

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

• Fuel tank temperature sensor failed.

• Open or shorted fuel tank temperature sensor cir-

cuit, harness damage or connector damage.

• ECM failed. <M/T>

• PCM failed. <A/T>

NOTE: A diagnostic trouble code (DTC) could be
output if the engine coolant is changed as indicated
below. Because this is not a failure, the DTC must be
erased.
Make sure to test drive the vehicle in accordance
with the drive cycle pattern in order to verify that a
DTC will not be output.

.

•

The engine and the radiator have been flushed
repeatedly when the engine coolant temperature
was high (or the fuel tank temperature was high).

DIAGNOSIS

Required Special Tools:

• MB991958 (MUT-III Sub Assembly)

• MB991824: V.C.I.

• MB991827: USB Cable

• MB991911: Main Harness B

STEP 1. Using scan tool MB991958, check data list item
4A: Fuel Tank Temperature Sensor.

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) Set scan tool MB991958 to the data reading mode for item

4A, Fuel Tank Temperature Sensor.

• With the engine cool, the Fuel Tank Temperature should

be approximately the same as ambient air temperature.

(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the sensor operating properly?

YES : It can be assumed that this malfunction is intermittent.

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

P.00-6

.

NO : Go to Step 2.

AK300810

AB

MB991911

16-PIN

MB991827

MB991824

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

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MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-347

STEP 2. Check connector D-17 at the fuel tank temperature
sensor for damage.
Q: Is the connector in good condition?

YES : Go to Step 3.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection

P.00E-2

. Then go to Step 12.

STEP 3. Check the fuel tank temperature sensor.
(1) Disconnect the fuel tank temperature sensor connector

D-17

(2) Measure the resistance between terminal No. 1 and No. 3

of the fuel tank temperature sensor.

Standard value:

0.5

− 12.0 kΩ

Q: Is the resistance between 0.5 and 12.0 k

Ω?

YES : Go to Step 4.
NO : Replace the fuel tank temperature sensor. Then go to

Step 12.

AK300453

1

2

3

4

5

D-17 (GR)

AB

CONNECTOR: D-17

HARNESS CONNECTOR:
COMPONENT SIDE

AK300453

1

2

3

4

5

D-17 (GR)

AB

CONNECTOR: D-17

HARNESS CONNECTOR:
COMPONENT SIDE

AK101374

1 2 3

4 5

AB

1 2 3

4 5

FUEL TEMPERATURE SENSOR
SIDE CONNECTOR

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

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MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-348

STEP 4. Check the continuity at fuel tank temperature
sensor harness side connector D-17.
(1) Disconnect the connector D-17 and measure at the harness

side.

(2) Check for the continuity between terminal No. 1 and

ground.

• Should be less than 2 ohms.

Q: Is the continuity normal?

YES : Go to Step 5.
NO : Repair harness wire between fuel tank temperature

sensor connector D-17 (terminal No. 1) and ground
because of open circuit or harness damage. Then go
to Step 12.

STEP 5. Measure the sensor supply voltage at fuel tank
temperature sensor harness side connector D-17.
(1) Disconnect the connector D-17 and measure at the harness

side.

(2) Turn the ignition switch to the "ON" position.

(3) Measure the voltage between terminal No. 3 and ground.

• Voltage should be between 4.5 and 4.9 volts

(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the measured voltage between 4.5 and 4.9 volts?

YES : Go to Step 6.
NO : Go to Step 10.

AK300453

1

2

3

4

5

D-17 (GR)

AB

CONNECTOR: D-17

HARNESS CONNECTOR:
COMPONENT SIDE

AK101375

1

2

3

4

5

AH

1

2

3

4

5

D-17 HARNESS
CONNECTOR:
COMPONENT SIDE

AK300453

1

2

3

4

5

D-17 (GR)

AB

CONNECTOR: D-17

HARNESS CONNECTOR:
COMPONENT SIDE

AK101376

1

2

3

4

5

AH

1

2

3

4

5

D-17 HARNESS
CONNECTOR:
COMPONENT SIDE