Mitsubishi Eclipse / Eclipse Spyder (2000-2002). Service and repair manual — part 275

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-299

DIAGNOSIS

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

STEP 1. Using scan tool MB991502, check actuator test
item 29: Evaporative Emission Ventilation Solenoid.

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 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.

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.

AKX01177

16 PIN

MB991502

AB

ACX02516

CONNECTOR:D-10

EVAPORATIVE EMISSION
VENTILATION SOLENOID

AJ

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-300

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 1 and 2.

Standard value: 17

−

21

Ω

[at 20

°

C (68

°

F)]

Q: Is the resistance at the standard value?

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

12.

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 2 and ground.

•

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 6.
NO : Go to Step 5.

STEP 5. Check connector A-21X at MFI relay for damage.
Q: Is the connector in good condition?

YES : Check connectors D-16, C-28 and C-90 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-21X terminal 1 and
evaporative emission ventilation solenoid connector
D-10 terminal 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.

ACX02516

CONNECTOR:D-10

EVAPORATIVE EMISSION
VENTILATION SOLENOID

AJ

AK000004

2

1

EVAPORATIVE EMISSION
VENTILATION SOLENOID

AB

AKX01502

1

2

D-10 HARNESS
SIDE CONNECTOR

AI

AK000226

AK000226AB

CONNECTOR : A-21X

MFI RELAY

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-301

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 the voltage normal?

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

STEP 7. Check connector C-51 at ECM <M/T> or connector
C-52 at PCM <A/T> for damage.
Q: Is the connector in good condition?

YES : Go to Step 8.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection (

P.00E-2

). Then go to Step 12.

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>
CONNECTOR HARNESS
SIDE VIEW

AE

9

AK000225

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

C-52

C-51

PCM<A/T>

ECM<M/T>

AJ

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-302

STEP 8. Check for open circuit and short circuit to ground
between evaporative emission ventilation solenoid
connector D-10 terminal 1 and ECM connector C-51
terminal 35 <M/T> or PCM connector C-52 terminal 35 <A/
T>.
NOTE: Check harness after checking intermediate connectors
D-16, C-28 and C-90. If intermediate connectors are damaged,
repair or replace them. Refer to GROUP 00E, Harness
Connector Inspection (

P.00E-2

). Then go to Step 12.

Q: Is the harness wire in good condition?

YES : Replace the ECM or PCM. Then go to Step 12.
NO : Repair it. Then go to Step 12.

STEP 9. Check connector C-51 at ECM <M/T> or connector
C-52 at PCM <A/T> for damage.
Q: Is the connector in good condition?

YES : Go to Step 10.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection (

P.00E-2

). Then go to Step 12.

ACX02516

CONNECTOR:D-10

EVAPORATIVE EMISSION
VENTILATION SOLENOID

AJ

AK000225

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

C-52

C-51

PCM<A/T>

ECM<M/T>

AJ

AK000225

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

C-52

C-51

PCM<A/T>

ECM<M/T>

AJ