Mitsubishi Eclipse. Manual — part 553

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-755

STEP 2. Check evaporative emission purge solenoid for
leaks.
(1) Remove the battery.
(2) Remove the air intake hose. (Refer to GROUP 15, Air

Cleaner

P.15-6

.)

(3) Disconnect hose C from the evaporative emission purge

solenoid side, and connect a hand vacuum pump to the
nipple of the evaporative emission purge solenoid.

(4) Apply a pressure on the hand vacuum pump, and confirm

that air is maintained.

(5) Disconnect the hand vacuum pump, and connect hose C to

the evaporative emission purge solenoid.

Q: Is the evaporative emission purge solenoid in good

condition?
YES : Go to Step 3.
NO : Replace the evaporative emission purge solenoid.

Then go to Step 17.

AC106501

HOSE C

EVAPORATIVE
EMISSION
PURGE
SOLENOID

AD

<VEHICLES WITHOUT INTAKE MANIFOLD
TUNING SYSTEM>

AC106498

<VEHICLES WITH INTAKE MANIFOLD
TUNING SYSTEM>

AD

HOSE C

EVAPORATIVE
EMISSION
PURGE
SOLENOID

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-756

STEP 3. Check for leaks in the evaporator line hose A to
hose E <Vehicle without Intake Mnifold Tuning System> or
hose B, C, E <Vehicle with Intake Mnifold Tuning System>.

The leakage test with a hand vacuum pump on each hose
from hose A to hose E <vehicle without Intake Mnifold
Tuning System> or hose B, C, E <vehicle with Intake
Mnifold Tuning System>.

Q: Are the hoses in good condition?

YES : Go to Step 4.
NO : Replace the inferior hose. Then go to Step 17.

AC106521

HOSE E

HOSE D

HOSE A

AIR INTALE HOSE

EVAPORATIVE
EMISSION
PURGE
SOLENOID

HOSE C

HOSE B

<VEHICLES WITHOUT INTAKE MANIFOLD
TUNING SYSTEM>

AE

AC106522

<VEHICLES WITH INTAKE MANIFOLD
TUNING SYSTEM>

AC

EVAPORATIVE
EMISSION
PURGE
SOLENOID

EVAPORATIVE
EMISSION
PURGE
SOLENOID

HOSE B

HOSE C

HOSE C

HOSE E

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-757

STEP 4. Check the evaporative emission ventilation
solenoid using scan tool MB991958. (Actuator test item 29)

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) Disconnect the hose G from the evaporative emission

ventilation solenoid side.

(3) Connect the hand vacuum pump to the nipple of the

evaporative emission ventilation solenoid from which the
hoses have been disconnected.

(4) Turn the ignition switch to the "ON" position.
(5) Set scan tool MB991958 to actuator test mode for item 29:

Evaporative Emission Ventilation Solenoid. When the
evaporative emission ventilation solenoid is operated, apply
a pressure on the hand vacuum pump and confirm that air
is maintained.

(6) Turn the ignition switch to the "LOCK" (OFF) position, and

disconnect scan tool MB991958.

(7) Disconnect the hand vacuum pump, and connect hose G to

the evaporative emission canister.

Q: Is the evaporative emission ventilation solenoid in good

condition?
YES : Go to Step 5.
NO : Replace the evaporative emission ventilation

solenoid. Then go to Step 17.

AC303127

AB

MB991911

16-PIN

MB991827

MB991824

AC002030 AB

HOSE G

EVAPORATIVE EMISSION

VENTILATION SOLENOID

AC002031AB

EVAPORATIVE EMISSION

VENTILATION SOLENOID

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-758

STEP 5. Pressure test for evaporator line from hose F to
hose P.
(1) Remove the module bracket mounting bolts, and

disconnect hose G from the evaporative emission
ventilation solenoid side, and plug the hoses from which the
hoses have been disconnected.

(2) Confirm that the evaporative emission system pressure

pump (Miller number 6872A) is operating properly. Perform
the self-test as described in the manufacturer's instructions.

(3) Connect an evaporative emission system pressure pump to

the fuel filler neck.

(4) Pressure test the system to determine whether any leaks

are present.
NOTE: "Pressure test" in this procedure refers to the
I/M240 Simulation Test (8 simple steps) described in the
evaporative emission system pressure pump (Miller number
6872A) manufacturer's instructions located in the lid of the
pump box.

Q: Are the evaporator line in good condition?

YES : Go to Step 16.
NO : Go to Step 6.

STEP 6. Pressure test for evaporator line from hose I to
hose P.
(1) Disconnect hose I from the evaporative emission canister

side, and plug the hose from which the pipes have been
disconnected.

(2) Perform the pressure test again.
Q: Are the evaporator line in good condition?

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

AC002028 AB

HOSE G

AC000186

AC002036 AB

HOSE I