Mitsubishi Montero (2004+). Manual — part 289

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-643

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.17-72

).

(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.17-72

). Go to Step 17

.

NO : Replace the evaporative emission canister. (Refer to

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

P.17-72

). Go to Step 18

.

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-644

STEP 17. Using scan tool MB991958, check evaporative
emission system monitor test.

CAUTION

• To prevent damage to scan tool MB991958, always turn

the ignition switch to the "LOCK" (OFF) position before
connecting or disconnecting scan tool MB991958.

• 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 MB991958 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Erase the DTCs using scan tool MB991958.
(4) Check that the fuel cap is securely closed. (Tighten until

three clicks are heard).

(5) Start the engine.
(6) Select "System Test".
(7) Select "Evap Leak Mon".
(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 MB991958 will change from "NO" to "YES".

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

disconnect scan tool MB991958.

Q: Is "Evap Leak Mon. Completed. Test Failed and DTCs

Set" displayed on scan tool MB991958?
YES : Replace the PCM (Refer to

P.13A-1014

). Then go to

Step 18 .

NO <"Evap Leak Mon. Completed. Test Passed" is
displayed on scan tool MB991958.> : The evaporative

emission system is working properly at this time. Then
go to Step 18.

NO <"Evap Leak Mon. Discontinued. Retest again from
the first" is displayed on scan tool MB991958.> : The

EVAP monitor has been interrupted during the test.
Turn the ignition switch to the "LOCK" (OFF) position
once, and repeat the monitoring from Step 17.

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

(Refer to Diagnostic Function

− OBD-ll Drive Cycle −

Procedure 1

− Evaporative Emission System Leak Monitor

P.13A-4

).

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

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

AC306409AF

MB991911

MB991824

MB991827

Continue

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

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MULTIPORT FUEL INJECTION (MFI)

13A-645

13A

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

C

K

BLA

C

K

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)

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

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MULTIPORT FUEL INJECTION (MFI)

13A-646

.

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.

.

DESCRIPTIONS OF MONITOR METHODS
Detect malfunction if change of fuel level sensor out-

put voltage is small when sum of fuel injection is
large.

.

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)

• Not applicable

.

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

AK304350

F-07 (B)

AB

CONNECTOR: F-07

AK201053

E-113

AB

CONNECTOR: E-113