Mitsubishi Montero (2002-2004). Manual — part 652

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DIAGNOSTIC TROUBLE CODE PROCEDURES

13Ac-305

DTC P0182: Fuel Tank Temperature Sensor Circuit Low Input

POWERTRAIN CONTROL
MODULE (PCM)

Fuel Tank Temperature Sensor Circuit

2

16

3

2

7

1

BLA

CK

BLA

CK

LIGHT

GREEN-

RED

G-03

MU802337

1 2 3

AK201139

81

FUEL TANK TEMPERATURE SENSOR
(INTEGRATED IN FUEL LEVEL SENSOR)

4

17

1

12 13 14

18

30

41

34

3

16

10

6 7

19

31

42

20

32

43

21

33

25

24

26

36

35

37

29

28

15

27

38

8 9

39 40

11

2

22

5

23

D-111

8

7

6

5

1 2 3 4

F-07

MU802609

11

1

9 10

13

2

12

3 4

7

5

14

6

8

E-113

5 V

LIGHT

GREEN-

RED

LIGHT

GREEN-

RED

LIGHT GREEN-

RED

61
656667686970 717273
74757677787980 8182
8384

858687

8889

62

6364

D-134

(MU803804)

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DIAGNOSTIC TROUBLE CODE PROCEDURES

13Ac-306

.

CIRCUIT OPERATION

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

ture sensor output terminal (terminal No. 3) from
the PCM (terminal No. 81) 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. 2) 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.

.

DTC SET CONDITIONS

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.

.

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, or loose connector.

• PCM failed.

AK201038

CONNECTOR: D-134

AD

PCM

D-134(GR)

AK201053

E-113

AB

CONNECTOR: E-113

AK201055

CONNECTOR: D-111

D-111

AB

AK201040 AB

CONNECTOR: G-03

G-03(B)

FUEL TANK TEMPERATURE SENSOR
(INTEGRATED IN FUEL
LEVEL SENSOR)

AK201054

F-07(B)

AB

CONNECTOR: F-07

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DIAGNOSTIC TROUBLE CODE PROCEDURES

13Ac-307

DIAGNOSIS

Required Special Tool:

• MB991502: Scan Tool (MUT-II)

STEP 1. Using scan tool MB991502, check data list item
4A: Fuel Tank Temperature Sensor.

CAUTION

To prevent damage to scan tool MB991502, always turn the
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991502.
(1) Connect scan tool MB991502 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Set scan tool MB991502 to the data reading mode for item

4A, 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

P.00-6

.

NO : Go to Step 2.

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

03.

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

of the fuel tank temperature sensor.

Standard value:

0.5

− 12.0 kiloohms

Q: Is the resistance between 0.5 and 12.0 kiloohms?

YES : Go to Step 3.
NO : Replace the fuel tank temperature sensor. Then go to

Step 5.

ACX01539

16-PIN

MB991502

AC

AK200959

1

2

3

AB

CONNECTOR: G-03

G-03(B)

HARNESS
CONNECTOR:
COMPONENT SIDE

1 2 3

AK101072

FUEL TANK TEMPERATURE
SENSOR SIDE
CONNECTOR

AC

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DIAGNOSTIC TROUBLE CODE PROCEDURES

13Ac-308

STEP 3. Check connector G-03 at the fuel tank temperature
sensor and connector D-134 at PCM for damage.
Q: Is the connector in good condition?

YES : Go to Step 4.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection

P.00E-2

. Then go to Step 5.

AK200959

1

2

3

AB

CONNECTOR: G-03

G-03(B)

HARNESS
CONNECTOR:
COMPONENT SIDE

AK201166

61

62

63

64

65

66

67

68

69

70

71

76

77

78

79

85

86

87

80

72

73

74

75

81

82

83

84

88

89

CONNECTOR: D-134

AB

PCM

D-134(GR)

HARNESS CONNECTOR:
COMPONENT SIDE