Mitsubishi Montero (2002-2004). Manual — part 703

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DIAGNOSTIC TROUBLE CODE PROCEDURES

13Ac-509

STEP 16. Check for leaks in the evaporative emission
canister.
(1) Remove the evaporative emission canister. (Refer to

GROUP 17, Evaporative Emission Canister and Fuel Tank
Pressure Relief Valve

P.17-66

).

(2) Connect a hand vacuum pump to the vent nipple of the

evaporative emission canister.

(3) Plug the other two nipples or loop a hose between them.
(4) Apply vacuum with the hand vacuum pump and confirm that

the canister holds vacuum.

Q: Does the evaporative emission canister hold vacuum?

YES : Reinstall the evaporative emission canister. (Refer to

GROUP 17, Evaporative Emission Canister and Fuel
Tank Pressure Relief Valve

P.17-66

). Go to Step 17 .

NO : Replace the evaporative emission canister. (Refer to

GROUP 17, Evaporative Emission Canister and Fuel
Tank Pressure Relief Valve

P.17-66

). Go to Step 18 .

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DIAGNOSTIC TROUBLE CODE PROCEDURES

13Ac-510

STEP 17. Using scan tool MB991502, check evaporative
emission system monitor test.

CAUTION

• To prevent damage to scan tool MB991502, always turn

the ignition switch to the "LOCK" (OFF) position before
connecting or disconnecting scan tool MB991502.

• During this test, the PCM automatically increases the

engine speed to 1,600 r/min or greater. Check that the
transmission is set to "P" position.

(1) Connect scan tool MB991502 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Erase the DTCs using scan tool MB991502. (Refer to

GROUP 13A, Trouble Code Diagnosis

P.13Ab-2

).

(4) Check that the fuel cap is securely closed. (Tighten until

three clicks are heard).

(5) Start the engine.
(6) Select "System Test" and press the "YES" key.
(7) Select "Evap Leak Mon" and press the "YES" key.
(8) During this test, keep the accelerator pedal at the idling

position.

(9) Keep the engine speed and engine load within the specified

range. When the monitor test starts, the "In Progress" item
on scan tool MB991502 will change from "NO" to "YES".

(10)Turn the ignition switch to the "LOCK" (OFF) position and

disconnect scan tool MB991502.

Q: What is displayed on scan tool MB991502?

"Evap Leak Mon. Completed. Test Passed" : The

evaporative emission system is working properly at
this time. Go to Step 18 .

"Evap Leak Mon. Completed. Test Failed and DTCs Set"
:

Replace the PCM. Go to Step 18.

"Evap Lead Mon. discontinued. Retest again from the
first" : The monitor test was interrupted. Turn the ignition

switch to the "LOCK" (OFF) position once and repeat
evaporative emission system monitor test.

STEP 18. Perform the OBD-II drive cycle.
(1) Confirm the repair by performing the appropriate drive

cycle. [Refer to GROUP 13A, Trouble Code Diagnosis

−

OBD-II Drive Cycle (Procedure 1: Evaporative Emission
Control system Leak Monitor)

P.13Ab-2

].

(2) Read the DTC.
Q: Is DTC P0456 set?

YES : Repeat the troubleshooting procedure. Go to Step 1.
NO : The procedure is complete.

ACX01539

16-PIN

MB991502

AC

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DIAGNOSTIC TROUBLE CODE PROCEDURES

13Ac-511

DTC P0461: Fuel Level Sensor Circuit Range/Performance

POWERTRAIN CONTROL
MODULE (PCM)

METER AND GAUGE

Fuel Level Sensor Circuit

8

17

1

2

7

2

BLA

CK

BLA

CK

YELLO

W

-

GREEN

G-03

MU802337

1 2 3

AK201147

72

FUEL LEVEL SENSOR

YELLO

W

-

GREEN

YELLO

W

-

GREEN

YELLO

W

-

GREEN

YELLO

W

-

GREEN

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

61
656667686970 717273
74757677787980 8182
8384

858687

8889

62

6364

D-134

(MU803804)

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DIAGNOSTIC TROUBLE CODE PROCEDURES

13Ac-512

.

CIRCUIT OPERATION

• The fuel gauge drive signal is input in PCM (ter-

minal No. 72).

.

TECHNICAL DESCRIPTION

• Branch the drive signal from the fuel gauge cir-

cuit, and input it into PCM.

• The PCM detects the amount of fuel left in the

fuel tank with this signal, and also controls the
fuel level warning light.

.

DTC SET CONDITIONS

Check Conditions, Judgement Criteria

• When the fuel consumption calculated from the

operation time of the injector amounts to 20 litter,
the diversity of the amount of fuel in tank calcu-
lated from the fuel level sensor is 2 litter or less.

.

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

• Fuel level sensor failed.

• Open or shorted fuel level sensor circuit, or loose

connector.

• PCM failed.

AK201040 AB

CONNECTOR: G-03

G-03(B)

FUEL TANK TEMPERATURE SENSOR
(INTEGRATED IN FUEL
LEVEL SENSOR)

AK201038

CONNECTOR: D-134

AD

PCM

D-134(GR)

AK201055

CONNECTOR: D-111

D-111

AB

AK201054

F-07(B)

AB

CONNECTOR: F-07

AK201053

E-113

AB

CONNECTOR: E-113