Mitsubishi Galant 9G. Manual — part 1135

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>

13B-840

DTC P0463: Fuel Level Sensor Circuit High Input

1

2 3

4

5

22

21

23 24 25

26 27 28 29

30 31 32 33 34

35 36 37 38

39 40 41 42 43

1

2

AK401489

Fuel Level Sensor Circuit

FUEL LEVEL
SENSOR (SUB)

FUEL LEVEL SENSOR (MAIN)
(INTEGRATED IN FUEL PUMP MODULE)

13

2

1

2

1

11

PINK-

BLA

CK

BLA

CK

PINK-
BLACK

PINK-

BLA

CK

PINK-BLA

CK

24

GRA

Y

GRA

Y

POWERTRAIN
CONTROL
MODULE (PCM)

C-28

C-25

D-18

(MU802058)

D-17

CONBINATION METER

B-20

13

31

G

G

32 33 34 35 36 37 38 39 40 41

42 43 44 45 46 47 48 49 50 51 52

C-101

AK303875AB

CONNECTOR: D-17

FUEL LEVEL
SENSOR (SUB)

D-17

SERVICE
HOLE

AK303876AB

CONNECTOR: D-18

SERVICE
HOLE

FUEL LEVEL SENSOR (MAIN)
(INTEGRATED IN FUEL PUMP MODULE)

D-18 (GR)

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>

13B-841

.

CIRCUIT OPERATION

• The fuel level sensor output voltage is input in

combination meter (terminal No. 13).

.

TECHNICAL DESCRIPTION

• The fuel level sensor converts the rest of the fuel

to a voltage.

• The combination meter sends the data regarding

the rest of the fuel to the PCM.

• The PCM checks whether this data is within a

specified range.

.

DESCRIPTIONS OF MONITOR METHODS

An open circuit is detected while monitoring the

intake air temperature sensor output.

.

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

.

AK303838AB

C-25

CONNECTOR: C-25

AK303877AB

C-28

CONNECTOR: C-28

AK303085

CONNECTOR: B-20

PCM

AB

AIR CLEANER

B-20

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>

13B-842

DTC SET CONDITIONS
Logic Flow Chart

.

Check Conditions

• Battery positive voltage is between 11 and 16.5

volts.

• 2 seconds or more have passed since the engine

staring sequence was completed.

Judgement Criterion

• Fuel level sensor output voltage has continued to

be higher than 4.6 volts for 2 seconds.

.

OBD-II DRIVE CYCLE PATTERN

Refer to Diagnostic Function

− OBD-II Drive Cycle −

Procedure 6

− Other Monitor

P.13B-6

.

.

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 con-

nector damage.

• PCM failed.

END

MALFUNCTION

YES

YES

YES

NO

NO

NO

CONTINUOUS

FAILURE FOR 2secs

OUTPUT VOLTAGE

< 0.3V

OUTPUT VOLTAGE

> 4.6V

MONITORING

CONDITIONS

GOOD

START

AK401534

YES

NO

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>

13B-843

DIAGNOSIS

Required Special Tools:

• MB991958: Scan tool (MUT-III Sub Assembly)

• MB991824: V.C.I.

• MB991827: USB Cable

• MB991910: Main Harness A

STEP 1. Check fuel gauge.
Q: Is the fuel gauge functioning?

YES : Go to Step 2.
NO : Refer to GROUP 54A, Chassis Electrical

−

Combination Meters Assembly and Vehicle Speed
Sensor

− Equipment Diagnosis − Symptom Chart

P.54A-16

.

STEP 2. Check harness connector B-20 at PCM and
harness connector D-17 at fuel level sensor (sub) for
damage.
Q: Is the harness connector in good condition?

YES : Go to Step 3.
NO : Repair or replace them. Refer to GROUP 00E,

Harness Connector Inspection

P.00E-2

Then go to

Step 7.

AK303878

1

2

AB

CONNECTOR: D-17

D-17

HARNESS
CONNECTOR:
COMPONENT SIDE

AK303092

25

21

24 23 22

29 28 27 26

34 33 32 31 30

38 37 36 35

43 42 41 40 39

CONNECTOR: B-20

B-20

PCM

AB

HARNESS CONNECTOR:
COMPONENT SIDE

AIR CLEANER