Mitsubishi Eclipse / Eclipse Spyder (2000-2002). Service and repair manual — part 161

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-343

STEP 2. Check for open circuit, short circuit to ground and
harness damage between data link connector C-29
terminal 1 and ECM connector C-56 terminal 56 <M/T> or
PCM connector C-57 terminal 84 <A/T>.
NOTE: Check harness after checking intermediate connectors
C-77 and C-28. If intermediate connectors are damaged, repair
or replace them. Refer to GROUP 00E, Harness Connector
Inspection (

P.00E-2

). Then check that the malfunction is

eliminated.

Q: Is the harness wire in good condition?

YES : Go to Step 3.
NO : Repair it. Then confirm that the malfunction symptom

is eliminated.

STEP 3. Check for open circuit, short circuit to ground and
harness damage between data link connector C-29
terminal 7 and ECM connector C-56 terminal 62 <M/T> or
PCM connector C-57 terminal 85 <A/T>.
NOTE: Check harness after checking intermediate connectors
C-77 and C-28. If intermediate connectors are damaged, repair
or replace them. Refer to GROUP 00E, Harness Connector
Inspection (

P.00E-2

). Then check that the malfunction is

eliminated.

Q: Is the harness wire in good condition?

YES : Refer to, INSPECTION PROCEDURE 29

−

Power

Supply System and Ignition Switch-IG System(

P.13A-

409

).

NO : Repair it. Then confirm that the malfunction symptom

is eliminated.

ACX02447

CONNECTOR:C-29

ACCELERATOR
PEDAL

DATA LINK
CONNECTOR

AI

AK000280

C-56,C-57

ECM<M/T>
OR
PCM<A/T>

CONNECTORS:C-56<M/T>,C-57<A/T>

BJ

ACX02447

CONNECTOR:C-29

ACCELERATOR
PEDAL

DATA LINK
CONNECTOR

AI

AK000280

C-56,C-57

ECM<M/T>
OR
PCM<A/T>

CONNECTORS:C-56<M/T>,C-57<A/T>

BJ

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-344

INSPECTION PROCEDURE 3: The Service Engine Soon/Malfunction Indicator Lamp Does Not
Illuminate Right after the Ignition Switch Is Turned to the "ON" Position.

AK000675

44 45

41

46 47

42 43

49 50 5152

48

55 56

54

53

3

2

4 5 6

1 2 3
4 5 6

GREEN

1

RED-

YELLO

W

RED-

YELLO

W

BLA

CK-

WHITE

C-104
(MU801457)

R

IG2

ST

LOCK

ACC

IG1

C-101
MU801331

IGNITION
SWITCH

C-87

2

6

6

JUNCTION
BLOCK

52

C-41

41

C-28

SERVICE ENGINE SOON/
MALFUNCTION
INDICATOR LAMP

C-53<M/T>
(MU803771)

C-50<A/T>
(MU803784)

ENGINE CONTROL
MODULE(ECM)<M/T>
OR
POWERTRAIN CONTROL
MODULE(PCM)<A/T>

21

36<M/T>
22<A/T>

1

6

4

5

11

10

12 13

15

17

16

14

19

18

8 9

7

20

2 3

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

6

34

33

32

36

35

37

42

45

31

39

38

46

40 41

43 44

2

3 4

5 6

7 8

9

11 12 13 14 15 16 17 18 19 20

30

21 22 23

24 25

26 27 28 29

3132 33

34 35

1

10

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-345

CIRCUIT OPERATION

•

The service engine soon/malfunction indicator
lamp power is supplied from the ignition switch.

•

The ECM <M/T> or PCM <A/T> controls the
ground of the service engine soon/malfunction
indicator lamp by turning the power transistor in
the ECM <M/T> or PCM <A/T> ON and OFF.

COMMENT

•

The ECM <M/T> or PCM <A/T> causes the
service engine soon/malfunction indicator lamp to
illuminate for 5 seconds immediately after the
ignition switch is turned to the "ON" position
occurred.

TROUBLESHOOTING HINTS (The most likely
causes for this case:)

•

Burnt-out bulb.

•

Defective service engine soon/malfunction
indicator lamp circuit.

•

Malfunction of the ECM <M/T> or PCM <A/T>.

DIAGNOSIS

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

AK000312AI

CONNECTOR:C-41

AK000733AC

CONNECTOR:C-28

AK000315

CONNECTOR:C-101

AC

AK000280

C-50

C-53

ECM<M/T>
OR
PCM<A/T>

CONNECTORS:C-53<M/T>,C-50<A/T>

BK

AK000311

AK000311

CONNECTOR:C-104

AC

AK000219

CONNECTOR:C-87

AC

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-346

STEP 1. Using scan tool MB991502, check data list item 16:
Power Supply Voltage.

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) Turn the ignition switch to the "ON" position.
(3) Set scan tool MB991502 to the data reading mode for item

16, Power Supply Voltage.

•

Voltage should be battery positive voltage.

(4) Turn the ignition switch to the "LOCK" (OFF) position.

Q: Is the voltage normal?

YES : Go to Step 2.
NO : Refer to INSPECTION PROCEDURE 29

−

Power

Supply System and Ignition Switch-IG System
(

P.13A-409

).

STEP 2. Check the burned-out bulb.

Q: Is the valve normal?

YES : Go to step 3.
NO : Replace the bulb. Then confirm that the malfunction

symptom is eliminated.

STEP 3. Check connector C-41 at the combination meter
for damage.
Q: Is the connector in good condition?

YES : Go to step 4.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection (

P.00E-2

). Then confirm that

the malfunction symptom is eliminated.

AKX01177

16 PIN

MB991502

AB

AK000312AI

CONNECTOR:C-41