Mitsubishi Galant (2004+). Manual - part 978

 

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Mitsubishi Galant (2004+). Manual - part 978

 

 

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-729

STEP 1. Using scan tool MB991958, check the evaporative 
emission system monitor test.

CAUTION

• To prevent damage to scan tool MB991958, always turn 

the ignition switch to the "LOCK" (OFF) position before 
connecting or disconnecting scan tool MB991958.

• During this test, the PCM will automatically increase 

the engine speed to 1,600 r/min or greater. Check that 
the transaxle is set to the "P" position.

(1) Connect scan tool MB991958 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Erase the DTCs using scan tool MB991958.
(4) Check that the fuel cap is securely closed (Tighten until 

three clicks are heard). 

(5) Start the engine.
(6) Select "System Test."
(7) Select "Evap Leak Mon."
(8) During this test, keep the accelerator pedal at the idle 

position.

(9) Keep the engine speed and engine load within the specified 

range. When the monitor test starts, the "In Progress" item 
on scan tool MB991958 will change from "NO" to "YES."

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

disconnect scan tool MB991958.

Q: Is "Evap Leak Mon. Completed. Test Failed and DTCs 

Set" displayed on scan tool MB991958?
YES : 
A malfunction has been detected during the monitor 

test. Refer to the Diagnostic Trouble Code Chart and 
diagnose any other DTCs that are set 

P.13A-34

. If n

other DTC's have been set, go to Step 2.

NO <"Evap Leak Mon. Completed. Test Passed" is 
displayed on scan tool MB991958.> : 
The evaporative 

emission system is working properly at this time. 
Explain to the customer that an improperly tightened 
fuel cap can cause the MIL to illuminate. Return the 
vehicle to the customer.

NO <"Evap Leak Mon. Discontinued. Retest again from 
the first" is displayed on scan tool MB991958.> : 
The 

EVAP monitor has been interrupted during the test. 
Turn the ignition switch to the "LOCK" (OFF) position 
once, and repeat the monitoring from Step 1.

AC305412

AB

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-730

STEP 2. Check the evaporative emission purge solenoid 
for leaks.

(1) Disconnect hose C from the evaporative emission purge 

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

(2) Use the hand vacuum pump to confirm that the evaporative 

emission purge solenoid holds vacuum.

(3) Disconnect the hand vacuum pump, and reconnect hose C 

to the evaporative emission purge solenoid.

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 15.

STEP 3. Check for leaks in evaporative emission hoses A 
through E.

Use a hand vacuum pump to test each hose from hose A to 
hose E.

Q: Do the hoses hold vacuum?

YES : Go to Step 4.
NO :  Replace any damaged hose. Then go to Step 15.

STEP 4. Check for leaks in the chamber.

(1) Connect a hand vacuum pump to the nipple.
(2) Plug the other nipple.

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

that the applied vacuum does not fluctuate.

Q: Is the chamber in good condition?

YES : Go to Step 5.
NO :  Replace the chamber. Then go to Step 15.

AC306393

HOSE C

AB

AC306392

HOSE A

HOSE B

HOSE C

HOSE D

HOSE E

AB

AC306392

AC

CHAMBER

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-731

STEP 5. Check for leaks in evaporative emission hoses F 
through H.

Use a hand vacuum pump to test each hose from hose F to 
hose H.

Q: Do the hoses hold vacuum?

YES :  Go to Step 6.
NO :  Replace any damaged hose. Then go to Step 15.

AC306710

HOSE F

AB

AC306401

HOSE H

HOSE G

AB

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-732

STEP 6. Using scan tool MB991958, check data list item 29: 
Evaporative emission ventilation solenoid.

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) Remove the fuel tank filler tube protector (Refer to GROUP 

13C, Fuel Tank 

P.13C-10

).

(3) Disconnect hose H from evaporative emission canister and 

connect hand vacuum pump to hose H.

(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 the solenoid holds vacuum.

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

disconnect scan tool MB991958.

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

the evaporative emission canister.

(8) Reinstall the fuel tank filler tube protector (Refer to GROUP 

13C, Fuel Tank 

P.13C-10

).

Q: Did the evaporative emission ventilation solenoid hold 

vacuum?
YES : 
Go to Step 7.
NO :  Replace the evaporative emission ventilation solenoid 

(Refer to GROUP 17, Evaporative emission canister 
and fuel tank pressure relief valve removal and 
installation 

P.17-97

). Then go to Step 15.

AC305412

AB

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827

AC306777

AB

HOSE H

 

 

 

 

 

 

 

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