Mitsubishi Eclipse / Eclipse Spyder (2000-2002). Service and repair manual — part 183

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-431

STEP 4. Check connector C-54 at PCM for damage.
Q: Is the connector in good condition?

YES : Go to Step 5.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection (

P.00E-2

). Then confirm that

the malfunction symptom is eliminated.

STEP 5. Check for open circuit and short circuit to ground
and harness damage between park/neutral position switch
connector B-41 terminal 9 and PCM connector C-54
terminal 58.
Q: Is the harness wire in good condition?

YES : Replace the PCM. Then confirm that the malfunction

symptom is eliminated.

NO : Repair it. Then confirm that the malfunction symptom

is eliminated.

AK000280

CONNECTOR:C-54

BN

AK000547AE

CONNECTOR:B-41

AK000280

CONNECTOR:C-54

BN

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-432

INSPECTION PROCEDURE 33 : Ignition Circuit System

AK000383

3

3

1

1

2

2

1 2

4

1 2 3

1

3

4 5 6

1

GREEN

3

2

4 5 6

7

2

6

3

5

1

4

BL

ACK

-

WHITE

3

8

2

WHITE-RED

WHITE-

RED

WHITE-

RED

BL

ACK

-BL

UE

BL

ACK

WHITE-

GREEN

BL

ACK

BL

ACK

BL

ACK

-

RED

BL

ACK

-

RED

BL

ACK

-

RED

BL

ACK

-WHITE

BL

ACK

-WHITE

TO
TACHOMETER

LOCK

ACC

IG1

IGNITION
SWITCH

C-87

2

6

5

29

C-89

R

C-101
MU801331

C-54<A/T>
(MU803781)

C-50<A/T>
(MU803784)

C-49<M/T>
(MU803773)

C-56<M/T>
(MU803770)

NOTE
*1:ECM connector C-49<M/T>
*2:ECM connector C-56<M/T>
*3:PCM connector C-50<A/T>
*4:PCM connector C-54<A/T>

58
<M/T>*2
43
<A/T>*4

10
<M/T>*1
11
<A/T>*3

23
<M/T>*1
12
<A/T>*3

IG2

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

ENGINE
SPEED
DETECTION
CONNECTOR

IGNITION
COIL 1

IGNITION
COIL 2

B-16
(MU802053)

A-16X

B-21
(MU802053)

3

C-07
MU801333

B-03
(MU802724)

JUNCTION
BLOCK

ST

2

2

1

1

3

3

1

2

3

3

4

SPARK PLUG

IGNITOIN FAILURE SENSOR

15 16

26 27 28 29

32 33 34

17 18 19 20 21 22 23 24 25

30 31

36 37

35

38

10

11 12 13

1 2 3

4 5 6 7 8 9

14

1

14

4

19

5

22

6

17

8

15

9

18

7

20

16

2

13

12

23 24 25 26

21

3

10 11

42 43
48 49 50 51 52 53 54 55 56 57

46

45

44

58 59

60 61 62 63

64 65 66

47

41

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

58

60 61

53

52

51

55

54

56

59

62

57

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-433

CIRCUIT OPERATION

•

The ignition coil is energized by Battery positive
voltage from the ignition switch through the
ignition failure sensor.

•

When the ECM <M/T> or PCM <A/T> turns off its
internal power transistor, battery positive voltage
is applied to the ignition power transistor
(terminal 3) inside the ignition coil, causing the
ignition power transistor to be turned on.

•

If the ignition power transistor is turned on, the
primary circuit of the ignition coil is energized by
grounding the ignition coil through terminal 2,
causing the primary current to flow to the ignition
coil.

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

•

Malfunction of the ignition coil.

•

Malfunction of the ignition power transistor.

ACX02471

CONNECTOR : B-03

AF

IGNITION
FAILURE
SENSOR

AK000315

CONNECTOR:C-101

AC

AK000362AB

AK000362

CONNECTORS : B-16, B-21

B-21 B-16

AK000312AJ

CONNECTOR:C-07

AK000280

C-49,
C-50

C-54

C-60

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

CONNECTORS:C-49,C-56<M/T>,
C-50,C-54<A/T>

BO

AK000345AE

CONNECTOR:C-89

AK000219

CONNECTOR:C-87

AC

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-434

•

Malfunction of the ignition failure sensor.

•

Improper connector contact, open circuit or short-
circuited harness wire.

•

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

DIAGNOSIS

STEP 1. Check the ignition failure sensor.
Refer to GROUP 16, Ignition System

−

On-vehicle sErvice

−

Ignition Failure Sensor Check (

P.16-36

).

Q: Are there any abnormalities?

YES : Go to Step 2.
NO : Replace the ignition failure sensor. Then confirm that

the malfunction symptom is eliminated.

STEP 2. Check the ignition coil.
Refer to GROUP 16, Ignition System

−

On-vehicle sErvice

−

Ignition Coil Check (

P.16-34

).

Q: Are there any abnormalities?

YES : Go to Step 3.
NO : Replace the ignition coil. Then confirm that the

malfunction symptom is eliminated.

STEP 3. Check harness connectors B-03 at ignition failure
sensor for damage.
Q: Is the harness 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.

ACX02471

CONNECTOR : B-03

AF

IGNITION
FAILURE
SENSOR