Mitsubishi Eclipse. Manual — part 530

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-663

Judgment Criteria

• The evaporative emission ventilation solenoid

coil surge voltage (battery positive voltage + 2
volts) is not detected for 1 second. When the
evaporative emission ventilation solenoid is
turned OFF.

.

OBD-ll DRIVE CYCLE PATTERN
Refer to , Diagnostic Function

− OBD-ll Drive Cycle −

Procedure 6

− Other Monitor

P.13B-7

.

.

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

• Evaporative emission ventilation solenoid failed.

• Open or shorted evaporative emission ventilation

solenoid circuit, or harness damage, or connector
damage.

• ECM failed. <M/T>

• PCM failed. <A/T>

DIAGNOSIS

Required Special Tools:

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

• MB991824: V.C.I.

• MB991827: USB Cable

• MB991911: Main Harness B

STEP 1. Using scan tool MB991958, check actuator test
item 29: Evaporative Emission Ventilation Solenoid.

CAUTION

To prevent damage to scan tool MB991958, always turn the
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Set scan tool MB991958 to the actuator test mode for item

29, Evaporative emission ventilation solenoid.

• An operation sound should be heard and vibration

should be felt when the evaporative emission ventilation
solenoid is operated.

(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the solenoid 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.

AK300810

AB

MB991911

16-PIN

MB991827

MB991824

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-664

STEP 2. Check connector D-10 at the evaporative emission
ventilation solenoid 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 go to Step 12.

STEP 3. Check the evaporative emission ventilation
solenoid.
(1) Disconnect the evaporative emission ventilation solenoid

connector D-10.

(2) Measure the resistance between evaporative emission

ventilation solenoid side connector terminal No. 1 and No.
2.

Standard value: 17

− 21 ohms [at 20°C (68°F)]

Q: Is the resistance between 17 and 21 ohms?

YES : Go to Step 4.
NO : Replace the over vent valve module. Then go to Step

12.

AK300452

1

2

CONNECTOR: D-10

AB

D-10 (B)

HARNESS CONNECTOR:
COMPONENT SIDE

AK300452

1

2

CONNECTOR: D-10

AB

D-10 (B)

HARNESS CONNECTOR:
COMPONENT SIDE

AK000004

2

1

EVAPORATIVE EMISSION
VENTILATION SOLENOID

AB

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-665

STEP 4. Check the power supply voltage at evaporative
emission ventilation solenoid harness side connector
D-10.
(1) Disconnect the connector D-10 and measure at the harness

side.

(2) Turn the ignition switch to the "ON" position.

(3) Measure the voltage between terminal No. 2 and ground.

• Voltage should be battery positive voltage.

(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is battery positive voltage (approximately 12 volts)

present?
YES : Go to Step 6.
NO : Go to Step 5.

STEP 5. Check connector A-18X at MFI relay for damage.
Q: Is the connector in good condition?

YES : Check connectors C-28, C-90 and D-16 at

intermediate connector for damage, and repair or
replace as required. Refer to GROUP 00E, Harness
Connector Inspection

P.00E-2

. If intermediate

connectors are in good condition, repair harness wire
between MFI relay connector A-18X (terminal No. 4)
and evaporative emission ventilation solenoid
connector D-10 (terminal No. 2) because of open
circuit or short circuit to ground. Then go to Step 12.

NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection

P.00E-2

. Then go to Step 12.

AK300452

1

2

CONNECTOR: D-10

AB

D-10 (B)

HARNESS CONNECTOR:
COMPONENT SIDE

AKX01502

1

2

D-10 HARNESS
SIDE CONNECTOR

AI

AK300454

2

1

3

4

CONNECTOR: A-18X

AB

A-18X

HARNESS CONNECTOR:
COMPONENT SIDE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-666

STEP 6. Check the power supply voltage at ECM connector
C-51 <M/T> or PCM connector C-52 <A/T> by backprobing.
(1) Do not disconnect the connector C-51 <M/T> or C-52

<A/T>.

(2) Turn the ignition switch to the "ON" position.

(3) Measure the voltage between terminal 35 and ground by

backprobing.

• Voltage should be battery positive voltage.

(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is battery positive voltage (approximately 12 volts)

present?
YES : Go to Step 9.
NO : Go to Step 7.

AK300443

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

31

32

33

34

35

1

10

CONNECTOR: C-51 <M/T>

C-51 (GR)

AB

HARNESS CONNECTOR:
COMPONENT SIDE

AK300458

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

31

32

33

34

35

1

10

CONNECTOR: C-52 <A/T>

C-52 (GR)

AB

HARNESS CONNECTOR:
COMPONENT SIDE

AKX01548

1

2

3 4

5 6

7 8

10 11 12 13 14 15 16 17 18 19 20 21 22 23

24 25

26 27 28 29

30 31 32 33

34 35

C-51<M/T>, C-52<A/T>
HARNESS CONNECTOR:
HARNESS SIDE

AG

9