Mitsubishi Montero Sport (2004+). Manual — part 250

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-413

DTC P0182: Fuel Tank Temperature Sensor Circuit Low Input

AK303787

Fuel Tank Temperature Sensor Circuit

BL

ACK

YELL

OW

-

BL

UE

BL

ACK

YELL

OW

-

RED

YELL

OW

-

RED

1 2 3

FUEL TANK TEMPERATURE SENSOR
(INTEGRATED IN FUEL GAUGE UNIT)

POWERTRAIN CONTROL MODULE (PCM)

2

3 4

10 11

5 6 7 8 9

1

C-85
MU801551

E-30

3

16

51

6

1

4

5V

1

10

15

2

11

3

12

4

13 14

5

16

6

17

7

18

8

19

9

20

E-44

47

41

42 43

48 49 50 51 52 53 54 55 56 57

46

45

44

58

59

60 61 62 63

64 65 66

C-90
(MU803781)

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

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MULTIPORT FUEL INJECTION (MFI)

13A-414

.

CIRCUIT OPERATION

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

ture sensor output terminal (terminal No. 1) from
the PCM (terminal No. 51) via the resistor in the
PCM.

• The fuel tank temperature sensor output voltage

increases when the resistance increases and
decreases when the resistance decreases. The
ground terminal (terminal No. 3) is grounded to
the vehicle body.

.

TECHNICAL DESCRIPTION

• The fuel tank temperature sensor converts the

fuel tank temperature to a voltage.

• The PCM detects the fuel tank temperature in the

fuel tank with this output voltage.

.

DESCRIPTIONS OF MONITOR METHODS
Fuel tank temperature sensor output voltage is out of

specified range.

.

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

.

AK103912AC

CONNECTOR: C-85

C-85

AK200017

CONNECTOR: E-30

AD

FUEL TANK
TEMPERATURE
SENSOR

E-30

AK103738AC

CONNECTOR: C-90

PCM

C-90(GR)

AK200018 AB

CONNECTOR: E-44

E-44

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

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MULTIPORT FUEL INJECTION (MFI)

13A-415

DTC SET CONDITIONS

Logic Flow Chart

.

Check Conditions

• 2 seconds or more have passed since the start-

ing sequence was completed.

Judgement Criteria

• Sensor output voltage has continued to be 0.1

volt or lower for 2 seconds.

.

OBD-II DRIVE CYCLE PATTERN
Refer to Diagnostic Function

− OBD-II Drive Cycle −

Procedure 6

− Other Monitor

P.13A-4

.

.

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

• Fuel tank temperature sensor failed.

• Shorted fuel tank temperature sensor circuit, or

connector damage.

• PCM failed.

DIAGNOSIS

Required Special Tools:

• MB991958: Scan Tool (MUT-III Sub Assembly)

• MB991824: V.C.I

• MB991827: USB Cable

• MB991911: Main Harness B

START

MONITORING

CONDITIONS

END

NO

NO

NO

YES

YES

YES

MALFUNCTION

GOOD

OUTPUT VOLTAGE

< 0.1V

CONTINUOUS

FAILURE FOR 2secs

OUTPUT VOLTAGE

> 4.6V

NO

YES

AK301445

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

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MULTIPORT FUEL INJECTION (MFI)

13A-416

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.00-7

.

NO : Go to Step 2.

STEP 2. Check the fuel tank temperature sensor.
(1) Disconnect the fuel tank temperature sensor connector

E-30

(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 3.
NO : Replace the fuel tank temperature sensor. Then go to

Step 5.

AK303629AB

MB991911

MB991827

MB991824

16-PIN

AK200019

3 2 1

CONNECTOR: E-30

AB

HARNESS
CONNECTOR:
COMPONENT
SIDE

E-30

AK000576

3

1 2

FUEL TANK TEMPERATURE
SENSOR CONNECTOR

AC