Mitsubishi Montero Sport (2004+). Manual - part 275

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-513

STEP 2. Check the evaporative emission purge solenoid 
valve using scan tool MB991958 (Actuator test item 08).

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 hoses A to B from the evaporative emission 

purge solenoid valve side.

(3) Connect a hand vacuum pump to the evaporative emission 

purge solenoid valve instead of hose B.

(4) Turn the ignition switch to the "ON" position.
(5) Set scan tool MB991958 to actuator rest mode.

• Item 08: evaporative Emission Purge solenoid valve.

• When the evaporative emission purge solenoid 

valve is operated, apply a pressure on the hand vac-
uum pump and confirm that air is blown from the 
other side nipple.

(6) Turn the ignition switch to the "LOCK" (OFF) position.
(7) Disconnect the hand vacuum pump, and connect hoses A 

and B to the evaporative emission purge solenoid valve.

Q: Does the evaporative emission purge solenoid hold 

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

Then go to Step 16 .

AK303629AB

MB991911

MB991827

MB991824 

16-PIN

ACX01696 AD

HOSE A

EVAPORATIVE EMISSION

PURGE SOLENOID

HOSE B

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-514

STEP 3. Check for leaks in the evaporator emission 
system hose A through hose C.
Use a hand vacuum pump to test each hose from hose A to 
hose C.
Q: Do the hoses hold vacuum?

YES : Go to Step 4 .
NO :  Replace any damaged hose. Then go to Step 16 .

AC005143 AC

HOSE A

HOSE B

HOSE C

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-515

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 hose M from the evaporative emission 

ventilation solenoid side.

AK303629AB

MB991911

MB991827

MB991824 

16-PIN

AC004932

HOSE M

AF

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-516

(3) Connect a hand vacuum pump to the hose M.
(4) Turn the ignition switch to the "ON" position.
(5) Set scan tool MB991958 to actuator test mode.

• Item 29: Evaporative Emission Ventilation Solenoid.

• While the evaporative emission ventilation solenoid 

is energized, operate the hand vacuum pump and 
confirm that solenoid holds vacuum.

(6) Turn the ignition switch to the "LOCK" (OFF) position.
(7) Disconnect the hand vacuum pump, and connect hose M to 

the evaporative emission ventilation solenoid.

Q: Does the evaporative emission ventilation solenoid hold 

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

solenoid. (Refer to GROUP 17, Evaporative Emission 
Canister and Fuel Tank Pressure Relief Valve 

P.17-116

). Then go to Step 16 .

STEP 5. Check for vacuum leak in evaporative emission 
system hose M.
Perform a leakage test with a hand vacuum pump on hose M.
Q: Does the hose M hold vacuum?

YES : Go to Step 6 .
NO :  Replace the Hose M. (Refer to GROUP 17, 

Evaporative Emission Canister and Fuel Tank 
Pressure Relief Valve 

P.17-116

). Then go to Step 16 .

STEP 6. Check for vacuum leak in evaporative emission 
system hose D.
Perform a leakage test with a hand vacuum pump on hose D.
Q: Does the hose D hold vacuum?

YES : Go to Step 7 .
NO :  Replace the Hose D. (Refer to GROUP 17, 

Evaporative Emission Canister and Fuel Tank 
Pressure Relief Valve 

P.17-116

). Then go to Step 16 .

AC004935

AC004932

HOSE M

AF

AC004932

HOSE D

AG