Mitsubishi Montero Sport (2004+). Manual - part 305

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-633

STEP 15. Check the evaporative emission canister for 
leaks and clogging.
(1) Remove the evaporative emission canister. (Refer to 

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

P.17-116

).

(2) Connect a hand vacuum pump to the canister instead of 

hose, and plug the other nipples.

(3) Apply a pressure on the hand vacuum pump, and confirm 

that air is maintained.

Q: Does the evaporative emission canister hold vacuum?

YES : Go to Step 14 .
NO :  Replace the evaporative emission canister. (Refer to 

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

P.17-116

). Then go to 

Step 16 .

STEP 16. Perform the OBD-II drive cycle.
(1) Confirm the repair by performing the appropriate drive 

cycle. (Refer to 

P.13A-4

).

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

YES : Return to Step 1 .
NO :  The procedure is complete.

AC004931

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-634

DTC P0461: Fuel Level Sensor Circuit Range/Performance

BL

ACK

BL

ACK

AK000579

Fuel Level Sensor Circuit

YELL

OW

YELL

OW

YELL

OW

3

6

5

3

60

2

POWERTRAIN CONTROL
MODULE (PCM)

FUEL GAUGE UNIT

METER AND GAUGE

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)

2

3 4

10 11

5 6 7 8 9

1

C-85
MU801551

1

10

15

2

11

3

12

4

13 14

5

16

6

17

7

18

8

19

9

20

E-44

1 2 3

E-30

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-635

.

CIRCUIT OPERATION

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

minal No. 60).

.

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

.

AK103912AC

CONNECTOR: C-85

C-85

AK200017

CONNECTOR: E-30

AC

FUEL 
GAUGE 
UNIT

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-636

DTC SET CONDITIONS

Logic Flow Chart

.

INDICATED FUEL LEVEL

CHANGE < 2L

ACCUMULATE FUEL CONSUMPTION

THROUGH FUEL INJECTORS.

ACCUMULATED FUEL 
CONSUMPTION WILL NOT 
RESET WHEN KEY-OFF/ON.

ACCUMULATED FUEL >= SPECIFIED

CONSUMPTION          VALUE

START

END

NO

NO

NO

YES

YES

YES

MALFUNCTION

GOOD

MONITORING

CONDITIONS

RESET ACCUMULATE

FUEL CONSUMPTION.

AK301450