Mitsubishi Outlander GS45X. Manual — part 613

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-275

.

CIRCUIT OPERATION

• 5-volt voltage is applied to the fuel tank tempera-

ture sensor output terminal (terminal No. 3) from
the ECM (terminal No. 115) via the resistor in the
ECM.

• The fuel tank temperature sensor output voltage

increases when the resistance increases and
decreases when the resistance decreases. The
ground terminal (terminal No. 1) is grounded to
the vehicle body.

.

TECHNICAL DESCRIPTION

• The fuel tank temperature sensor converts the

fuel tank temperature to a voltage.

• The ECM detects the fuel tank temperature with

this output voltage.

.

DESCRIPTIONS OF MONITOR METHODS

Fuel tank temperature at engine start is higher than

engine coolant temperature at engine start by
specified value when engine is cold start condi-
tion.

.

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

Sensor (The sensor below is determined to be

normal)

• Engine coolant temperature sensor

• Intake air temperature sensor

.

AK704107

AB

Fuel tank differential
pressure sensor

Fuel pump module (incorporating
fuel level sensor (main) and
fuel tank temperature sensor)

Connector: D-20

D-20 (GR)

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-276

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.

• The engine coolant temperature is higher than

60

°C (140°F).

• Maximum vehicle speed is higher than 30 km/h

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

Judgement Criterion

• The fuel tank temperature − engine coolant tem-

perature is 15

°C (27°F) or more when the engine

is started.

No

No

No

No

End

No

No

Malfunction

Good

“Fuel temp. at

engine start”-

“engine coolant temp. at

engine start”

> 15˚C (59˚F)

Engine

coolant temp.

> =60˚C (140˚F)

Engine

coolant temp.

> =60˚C (140˚F)

Max.

vehicle speed

> 30km/h (19mph)

Max.

vehicle speed

> 30km/h (19mph)

AK604329

Start

Yes

Yes

Yes

Yes

Yes

Yes

Monitoring
conditions

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-277

.

OBD-II DRIVE CYCLE PATTERN

Refer to Diagnostic Function

− OBD-II Drive Cycle −

Pattern 14

P.13A-11

.

.

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

• Fuel tank temperature sensor failed.

• Fuel tank temperature sensor circuit harness

damage, or connector damage.

• ECM failed.

NOTE: A diagnostic trouble code (DTC) could be
output if the engine and the radiator have been
flushed repeatedly when the engine coolant temper-
ature was high (or the fuel tank temperature was
high). Because this is not a failure, the DTC must be
erased.
Make sure to test drive the vehicle in accordance
with the OBD-II drive cycle pattern in order to verify
that a DTC will not be output.

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, check data list item 53:
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

53, Fuel Tank Temperature Sensor.

• Approximately the same as the ambient air temperature

when the engine is cooled.

(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

− How to

Cope with Intermittent Malfunctions

P.00-15

.

NO : Go to Step 2.

STEP 2. Check harness connector D-20 at the fuel tank
temperature sensor for damage.
Q: Is the harness 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 7.

AK700568AB

MB991824

MB991827

MB991910

Data link
connector

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-278

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

D-20.

(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 measured 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 7.

STEP 4. Check the continuity at fuel tank temperature
sensor harness side connector D-20.
(1) Disconnect the connector D-20 and measure at the harness

side.

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

ground.

• Continuity (2 ohms or less)

Q: Does continuity exist?

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

sensor connector D-20 (terminal No. 1) and ground
because of harness damage. Then go to Step 7.

STEP 5. Check harness connector B-11 at ECM for
damage.
Q: Is the harness connector in good condition?

YES : Go to Step 6.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection

P.00E-2

. Then go to Step 7.

1

2 3

4

5

AK203165

Fuel tank temperature
sensor connector

AC

1

2

3

4

5

AK704111

D-20 harness
connector:
component side

AB