Mitsubishi Eclipse. Manual - part 247

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-481

STEP 5. 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 E 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 E to 

the evaporative emission canister.

Q: Is the evaporative emission ventilation solenoid in good 

condition?
YES : Go to Step 6.
NO :  Replace the evaporative emission ventilation 

solenoid. Then go to Step 18.

AC303127

AB

MB991911

16-PIN

MB991827

MB991824 

AC002030

EVAPORATIVE EMISSION 

VENTILATION SOLENOID

HOSE E

AC

AC002031AB

EVAPORATIVE EMISSION 

VENTILATION SOLENOID

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-482

STEP 6. Pressure test for evaporator line from hose D to 
hose N.
(1) Remove the module bracket mounting bolts, and 

disconnect hose E 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 17.
NO :  Go to Step 7.

STEP 7. Pressure test for evaporator line from hose G to 
hose N.
(1) Disconnect hose G 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 8.
NO :  Go to Step 10.

AC002028

HOSE E

AC

AC000186

AC002036 AC

HOSE G

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-483

STEP 8. Check for leaks in the evaporator line hose D to 
hose F.
(1) Remove the fuel tank. (Refer to GROUP 13C, Fuel Tank 

P.13C-13

.)

(2) The leakage test with a hand vacuum pump on each hose 

from hose D to hose F.

Q: Are the hoses in good condition?

YES : Go to Step 9.
NO :  Replace that hose, reinstall the fuel tank. (Refer to 

GROUP 13C, Fuel Tank 

P.13C-13

.) Then go to Step 

18.

STEP 9. Check for leaks in the evaporative emission 
canister.
(1) Connect a hand vacuum pump to the vent nipple of the 

evaporative emission canister.

(2) Plug the other two nipples or loop a hose between the other 

nipples.

(3) Apply a vacuum with the hand vacuum pump, and confirm 

that the applied vacuum does not fluctuate.

Q: Is the evaporation emission canister in good condition?

YES : Go to Step 18.
NO :  Replace the evaporative emission canister (Refer to 

GROUP 17, Evaporative Emission Canister and Fuel 
Tank Pressure Relief Valve 

P.17-117

.) and reinstall 

the fuel tank. (Refer to GROUP 13C, Fuel Tank 

P.13C-13

.) Then go to Step 18.

AC002037AE

HOSE D

HOSE F

HOSE E

AC000191AB

VENT
NIPPLE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-484

STEP 10. Check for leaks in the evaporator line from hose 
H and hose I.
(1) Remove the fuel filler neck protector. (Refer to GROUP 

13C, Fuel Tank 

P.13C-13

.)

(2) Disconnect hose H at the liquid separator, and then connect 

a hand vacuum pump to the hose.

(3) Disconnect hose I at the fuel tank side, and then plug the 

hose.

(4) Apply vacuum with the hand vacuum pump, and confirm 

that the applied vacuum does not fluctuate.

Q: Are the evaporator line in good condition?

YES : Go to Step 11.
NO :  Replace that hose, reinstall the fuel filler neck 

protector. (Refer to GROUP 13C, Fuel Tank 

P.13C-13

.) Then go to Step 18.

STEP11. Check for leaks in the evaporator line hose G, J, 
K, L and M.
(1) Remove the fuel tank and fuel filler neck assembly. (Refer 

to GROUP 13C, Fuel Tank 

P.13C-13

.)

(2) The leakage test with a hand vacuum pump on each hose 

from hose G, J, K, L and M.

Q: Are the hoses in good condition?

YES : Go to Step 12.
NO :  Replace the hose, reinstall the fuel tank and fuel filler 

neck assembly. (Refer to GROUP 13C, Fuel Tank 

P.13C-13

.) Then go to Step 18.

AC02040 AC

HOSE H

AC002038

HOSE I

AC

AC002032

AB

HOSE G

AC

AC002039

AB

HOSE L

AC

HOSE K

HOSE M

HOSE J