Mitsubishi Eclipse / Eclipse Spyder (2000-2002). Service and repair manual — part 175

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-399

DIAGNOSIS

STEP 1. Check the evaporative emission purge solenoid
Refer to GROUP 17, Emission Control System

−

Evaporative

Emission Purge Solenoid Check (

P.17-93

).

Q: Is the evaporative emission purge solenoid normal?

YES : Go to Step 2.
NO : Repair or replace. Then confirm that the malfunction

symptom is eliminated.

STEP 2. Check the evaporative emission ventilation
solenoid.
Refer to GROUP 17, Emission Control System

−

Evaporative

Emission Ventilation Solenoid Check (

P.17-95

).

Q: Is the evaporative emission ventilation solenoid

normal?
YES : Check the following items, and repair or replace the

defective items.

a. Check for leaks from the vapor line or

evaporative emission canister.

b. Check for leaks from the fuel tank.

Then confirm that the malfunction symptom is

eliminated.

NO : Repair or replace. Then confirm that the malfunction

symptom is eliminated.

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-400

INSPECTION PROCEDURE 26: Generator output voltage is low (approximately 12.3 volts)

AK000676

4

3

2

6

3 4
7 8

1 2

5

1

BLA

CK-RED

BLA

CK-RED

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

GENERATOR

VOLTAGE
REGULATOR

B-45

1

2

B-13
MU802749

33<M/T>
8<A/T>

C-53<M/T>
(MU803771)

C-50<A/T>
(MU803784)

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

AK000547AB

CONNECTOR:B-13

AK000546AC

CONNECTOR:C-45

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-401

CIRCUIT OPERATION

•

The EMC <M/T> or PCM <A/T> controls
generator out put current by duty-controlling
continuity between the generator G terminal
(terminal 1) and ground.

TROUBLESHOOTING HINTS (The most likely
causes for this charging system:)

•

Malfunction of the charging system.

•

Short circuit in the harness between generator G
terminal and ECM <M/T> or PCM <A/T>.

•

ECM <M/T> or PCM <A/T> failed.

DIAGNOSIS

STEP 1. Check the voltage at generator intermediate
connector B-13 by backprobing
(1) Do not disconnect the connector B-13.
(2) Start the engine and run at idle.
(3) Measure the voltage between terminal 2 and ground by

backprobing.

a. Engine: warming up
b. Radiator fan: stopped

c. Headlight switch: OFF to ON

d. Rear defogger switch: OFF to ON
e. Stoplight switch: OFF to ON

•

Voltage rises by 0.2-3.5 volts.

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

Q: Is the voltage normal?

YES : Replace the generator. Then confirm that the

malfunction symptom is eliminated.

NO : Go to Step 2.

STEP 2. Check connector B-13 at generator intermediate
connector for damage.
Q: Is the connector in good condition?

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

Connector Inspection (

P.00E-2

). Then confirm that

the malfunction symptom is eliminated.

AK000280

C-50

C-53

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

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

BK

AK000365 AB

B-13 CONNECTOR
HARNESS
SIDE VIEW

1 2 3 4

5 6 7 8

AK000547AB

CONNECTOR:B-13

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-402

STEP 3. Check connector B-45 at generator connector 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.

STEP 4. Check connector C-53 at ECM <M/T> or connector
C-50 at PCM <A/T> 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.

AK000546AC

CONNECTOR:C-45

AK000280

C-50

C-53

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

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

BK