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

TSB Revision

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

TSB Revision

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

TSB Revision

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