Mitsubishi Eclipse / Eclipse Spyder (2000-2002). Service and repair manual — part 145

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-279

STEP 33. Check for clogging in the evaporator line from
hose D and hose N.
(1) Remove the filler neck assembly. (Refer to GROUP 13C,

Fuel tank

P.13C-6

.)

(2) Carry out the clogging test with a hand vacuum pump on

each hose from hose D and hose N.

Q: Are there any clogs?

YES : Replace that hose, reinstall the fuel tank, and perform

the OBD-II drive cycle

P.13A-5

.

NO : Reinstall the fuel tank. Then go to Step 34.

STEP 34. Evaporative Emission System Monitor Test using
scan tool MB991502.
(1) Turn the ignition switch to the "ON" position.
(2) Erase the DTCs using the scan tool MB991502.
(3) Check that the fuel cap is securely closed. (Tighten until

three clicks are heard.)

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

position.

NOTE: If the engine speed does not reach 2,000 r/min
during the monitor test, adjustment of the Speed Adjusting
Screw may be needed. Refer to

P.13A-474

and adjust to

the standard value.

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

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

Q: What kind of message is displayed on scan tool

MB991502?
When the message "Evap Leak Mon. Completed. Test
Passed" is displayed : The evaporative emission system

is working properly at this time. Explain to customer
that improperly tightened fuel cap can cause MIL to
turn on, and return the vehicle.

When the message "Evap Leak Mon. Completed. Test
Failed and DTCs Set" is displayed : Go to Step 1.
When the message "Evap Lead Mon. discontinued.
Retest again from the first" is displayed : Turn the

ignition switch to the "LOCK" (OFF) position once,
then repeat this monitor test from the start.

AC000195 AE

HOSE D

HOSE N

AC001252

MB991502

16 PIN

AB

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

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MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-280

DTC P0500: Vehicle Speed Sensor Malfunction <M/T>

AK000668

3

1

2 3

12 13

15

17

16

14

19

18

8 9

7

20

2 3

1

6

4

5

3

2

4 5 6

1 2 3
4 5 6

1

11

WHITE

BLUE

WHITE-

BLUE

WHITE-

BLUE

BLA

CK

BLA

CK

7 8

5

3 4

35

34

10 11 12

2122 23 24

13 14 15

25 26 27

16

28

17

18 19 20

29

30 31

32 33

36 37

38

9

1 2

16

15

18

17

14

20

22

21

9

7

1 2

5

19

3

33

32

30 31

29

28

25

24

23

27

26

6

11

13

4

10

8

BLA

CK-

WHITE

BLA

CK-

WHITE

BLA

CK-

WHITE

BLA

CK-

WHITE

GREEN

1

10

12

6

2

C-60
(MU803772)

AUTO-CRUISE
CONTROL SYSTEM
METER AND
GAUGE
MULTI CENTER
DISPLAY

5V

B-39
(MU802723)

VEHICLE SPEED
SENSOR

B-36

86

ENGINE CONTROL
MODULE(ECM)

C-104
MU801457

R

IG2

ST

LOCK

ACC

IG1

C-101
MU801331

IGNITION
SWITCH

C-87

2

6

6

1

2

2

3

3

C-28

C-78

1

4

4

1

JOINT
CONNECTOR(2)

JUNCTION
BLOCK

82

78

81

80

89 90 91 92

79

87

71

74

73

72

76

75

77

85

88

83 84

86

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

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MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-281

CIRCUIT OPERATION

•

A 5-volt voltage is applied to the vehicle speed
sensor output terminal (terminal 3) from the ECM
(terminal 86). The vehicle speed sensor
generates a pulse signal when the output
terminal is opened and grounded.

TECHNICAL DESCRIPTION

•

The vehicle speed sensor converts the vehicle
speed into pulse signals and inputs them to the
ECM.

•

The vehicle speed sensor outputs a pulse signal
while the vehicle is driven.

•

The ECM checks whether the pulse signal is
output.

AK000547AC

CONNECTOR:B-39

AK000312AG

CONNECTOR:C-78

AK000219

CONNECTOR:C-87

AC

AK000733AC

CONNECTOR:C-28

AK000311

AK000311

CONNECTOR:C-104

AC

AK000315

CONNECTOR:C-101

AC

AK000547AD

CONNECTOR:B-36

AK000280

CONNECTOR:C-60

BI

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

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MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-282

DTC SET CONDITIONS

Check Conditions

•

Two seconds or more have passed the starting
sequence was completed.

•

The throttle valve is opener than its idling
position.

•

Engine speed is at between 2,000 and 4,000 r/
min.

•

Volumetric efficiency is at between 48 and 65
percent.

Judgement Criteria

•

Vehicle speed sensor output voltage has not
changed (no pulse signal is input) for 2 seconds.

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

•

Vehicle speed sensor failed.

•

Open or shorted vehicle speed sensor circuit, or
loose connector.

•

ECM failed.

DIAGNOSIS

Required Special Tools
MB991502: Scan Tool (MUT-II)

STEP 1. Using scan tool MB991502, check data list item 24:
Vehicle Speed Sensor.

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.
(1) Connect scan tool MB991502 to the data link connector.
(2) Start the engine.
(3) Set scan tool MB991502 to the data reading mode for item

24, Vehicle Speed Sensor.

•

Check that the speedometer and MUT-II display speed
match when traveling at a vehicle speed of 40km/h
(25mph).

(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 speed meter.

Q: Is the speed meter functioning?

YES : Go to Step 3.
NO : Go to Step 8.

AKX01177

16 PIN

MB991502

AB