Mitsubishi Eclipse. Manual - part 523

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-635

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-636

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-637

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-638

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