Mitsubishi Outlander GS45X. Manual - part 732

 

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Mitsubishi Outlander GS45X. Manual - part 732

 

 

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-751

Inspection procedure 11: When the engine is hot, it stalls at idle die out)

.

COMMENT

• In cases such as the above, the ignition system, 

air/fuel mixture or compression pressure may be 
faulty. In addition, if the engine suddenly stalls, 
the cause may also be a connector damage.

.

TROUBLESHOOTING HINTS (The most 
likely causes for this case:)

• Malfunction of the fuel pump system.

• Malfunction of the ignition system.

• Poor compression

• Malfunction of the EGR system.

• Improper operation of the PCV valve.

• Vacuum leak.

• Dirtiness around throttle valve.

• Malfunction of the ECM.

DIAGNOSIS

Required Special Tools:

• MB991958: Scan Tool (M.U.T.-III Sub Assembly)

• MB991824: V.C.I.

• MB991827: USB Cable

• MB991910: Main Harness A

STEP 1. Check if the EGR valve sounds during 
initialization.
Q: Is the initialization sound heard in the EGR valve?

YES : Go to Step 2.
NO :  Refer to GROUP 17, Emission Control 

− Exhaust Gas 

Recirculation (EGR) System 

− EGR Valve (Stepper 

Motor) Check 

P.17-81

.

STEP 2. Using scan tool MB991958, read the diagnostic 
trouble code (DTC).

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) Turn the ignition switch to the "ON" position.
(3) Read the DTC.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is any DTC set?

YES : Refer to Diagnostic Trouble Code Chart 

P.13A-49

.

NO :  Go to Step 3.

AK700568AB

MB991824

MB991827

MB991910

Data link
connector

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-752

STEP 3. Using scan tool MB991958, check actuator test 
item 1: injector.
(1) Turn the ignition switch to the "ON" position.
(2) Check following items in the actuator test. Refer to Actuator 

Test Reference Table 

P.13A-838

.

a. Item 1: Injector.

(3) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Are they operating properly?

YES : Go to Step 4.
NO :  Repair or replace it. Then confirm that the malfunction 

symptom is eliminated.

STEP 4. Using scan tool MB991958, check data list.
(1) Turn the ignition switch to the "ON" position.
(2) Check the following items in the data list. Refer to Data List 

Reference Table 

P.13A-818

.

a. Item 5: Intake Air Temperature Sensor.
b. Item 6: Engine Coolant Temperature Sensor.

c. Item 13: Throttle position sensor (main).

(3) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Are they operating properly?

YES : Go to Step 5.
NO :  Repair or replace it. Then confirm that the malfunction 

symptom is eliminated.

STEP 5. Inspection of throttle body (throttle valve area) for 
dirtiness.
Q: Is the throttle valve area dirty?

YES : Refer to On-vehicle Service 

− Throttle Body (Throttle 

Valve Area) Cleaning 

P.13A-865

.

NO :  Go to Step 6.

STEP 6. Check the fuel pressure.
Refer to Fuel Pressure Test 

P.13A-868

.

Q: Is the fuel pressure normal?

YES : Go to Step 7.
NO :  Repair or replace it. Then confirm that the malfunction 

symptom is eliminated.

STEP 7. Check the ignition timing.
Refer to GROUP 11A, On-vehicle Service 

− Ignition Timing 

Check 

P.11A-13

.

Q: Is the ignition timing normal?

YES : Go to Step 8.
NO :  Check for installed conditions of the timing chain. 

Then confirm that the malfunction symptom is 
eliminated.

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-753

STEP 8. Check the spark plugs.
Refer to GROUP 16, Ignition System 

− On-vehicle Service − 

Spark Plug Check And Cleaning 

P.16-45

.

Q: Are there any abnormalities?

YES : Replace the spark plug. Then confirm that the 

malfunction symptom is eliminated.

NO :  Go to Step 9.

STEP 9. Check the ignition coil.
Refer to GROUP 16, Ignition System 

− On-vehicle Service − 

Ignition Coil Check 

P.16-44

.

Q: Are there any abnormalities?

YES : Replace the ignition coil. Then confirm that the 

malfunction symptom is eliminated.

NO :  Go to Step 10.

STEP 10. Check the compression pressure.
Refer to GROUP 11A, On-vehicle Service 

− Compression 

Pressure Check 

P.11A-18

.

Q: Is the compression pressure normal?

YES : Go to Step 11.
NO :  Repair it. Then confirm that the malfunction symptom 

is eliminated.

STEP 11. Check the positive crankcase ventilation system.
Refer to GROUP 17, Emission Control 

− Positive Crankcase 

Ventilation System 

− Positive Crankcase Ventilation System 

Check 

P.17-74

.

Q: Is the positive crankcase ventilation system?

YES : Go to Step 12.
NO :  Repair it. Then confirm that the malfunction symptom 

is eliminated.

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-754

STEP 12. Engine stall reproduction test.
Q: Is it easy to reproduce the engine stall?

YES : Check the following items, and repair or replace the 

defective items.

a. Vacuum leak.
b. Check if fuel is contaminated.

c. Check if the injectors are clogged.

d. Check if the foreign materials (water, 

kerosene, etc.) got into fuel.

Then confirm that the malfunction symptom is 

eliminated.

NO :  Check if the following signals change suddenly by 

wiggling the circuit harness and connectors.

a. Crankshaft position sensor signal.
b. Mass airflow sensor signal.

c. Injector drive signal.

d. Primary and secondary ignition signal.
e. Fuel pump drive signal.

f. ECM power supply voltage.

Then confirm that the malfunction symptom is 

eliminated.

Inspection procedure 12: The engine stalls accelerating (pass out)

.

COMMENT

• In case such as the above, the cause is probably 

misfiring due to a weak spark, or an inappropriate 
air/fuel mixture when the accelerator pedal is 
depressed.

.

TROUBLESHOOTING HINTS (The most 
likely causes for this case:)

• Malfunction of the ignition system.

• Malfunction of the evaporative emission control 

system.

• Malfunction of the EGR system

• Improper operation of the PCV valve.

• Vacuum leak.

• Malfunction of the ECM.

DIAGNOSIS

Required Special Tools:

• MB991958: Scan Tool (M.U.T.-III Sub Assembly)

• MB991824: V.C.I.

• MB991827: USB Cable

• MB991910: Main Harness A

STEP 1. Check if the EGR valve sounds during 
initialization.
Q: Is the initialization sound heard in the EGR valve?

YES : Go to Step 2.
NO :  Refer to GROUP 17, Emission Control 

− Exhaust Gas 

Recirculation (EGR) System 

− EGR Valve (Stepper 

Motor) Check 

P.17-81

.

 

 

 

 

 

 

 

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