Mitsubishi Outlander XL. Manual - part 398

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 or PCM power supply voltage.

Then confirm that the malfunction symptom is eliminated.

INSPECTION PROCEDURE 12: The Engine Stalls when Accelerating (pass out).

M11310100289USA0000010000

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 purge 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.

MULTIPORT INJECTION SYSTEM (MFI) <DIAGNOSIS>

13Ab-787

SYMPTOM PROCEDURES

NO:

 Refer to GROUP 17, Emission Control - EGR Valve

(Stepper Motor) Check P.17c-14.

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

ZC501967

AC404789

ZC5019680000

MB991824

MB991827

MB991910

Data link

connector

To prevent damage to scan tool MB991958, always turn the
ignition  switch  to  the  "LOCK"  (OFF)  position  before
connecting 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.13Ab-44.

NO:

 Go to Step 3.

STEP 3. Using scan tool MB991958, check actuator test.

(1)

Turn the ignition switch to the "ON" position.

(2)

Check  the  following  item  in  the  actuator  test.  Refer  to
Actuator Test Reference Table P.13Ab-857.

a
.

Item 08: Evaporative Emission Purge Solenoid.

(3)

Turn the ignition switch to the "LOCK" (OFF) position.

Q:Is the actuator operating properly?

YES:

 Go to Step 4.

NO:

 Repair or replace it. Then confirm that the

malfunction symptom is eliminated.

STEP 4. Check the spark plugs.
Refer  to  GROUP  16,  Ignition  System  -  On-vehicle  service  -
Spark Plug Check P.16c-4.

Q:Are there any abnormalities?

YES:

 Replace the spark plug. Then confirm that the

malfunction symptom is eliminated.

NO:

 Go to Step 5.

STEP 5. Check the ignition coil.

(1)

Remove the intake manifold.

(2)

Refer to GROUP 16, Ignition System - On-vehicle service -
Ignition Coil Check P.16c-3.

Q:Are there any abnormalities?

YES:

 Replace the ignition coil. Then confirm that the

malfunction symptom is eliminated.

13Ab-788

MULTIPORT INJECTION SYSTEM (MFI) <DIAGNOSIS>

SYMPTOM PROCEDURES

NO:

 Go to Step 6.

STEP 6. Check the positive crankcase ventilation valve.
Refer  to  GROUP  17,  Emission  Control  System  -  Positive
Crankcase Ventilation Check P.17c-8.

Q:Is the positive crankcase ventilation valve?

YES:

 Check the following items, and repair or replace the

defective items.

a
.

Vacuum leak.

Then confirm that the malfunction symptom is eliminated.

NO:

 Repair it. Then confirm that the malfunction symptom

is eliminated.

INSPECTION PROCEDURE 13: The engine stalls when decelerating.

M11310100290USA0000010000

COMMENT

｠

Abnormal air/fuel ratio or other similar defects due
to insufficient intake air volume and defective EGR
system is suspected to be the causes.

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

｠

Malfunction of the ignition system.

｠

Malfunction of the purge control system.

｠

Malfunction of the EGR system.

｠

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 - EGR Valve

(Stepper Motor) Check P.17c-14.

MULTIPORT INJECTION SYSTEM (MFI) <DIAGNOSIS>

13Ab-789

SYMPTOM PROCEDURES

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

ZC501967

AC404789

ZC5019680000

MB991824

MB991827

MB991910

Data link

connector

To prevent damage to scan tool MB991958, always turn the
ignition  switch  to  the  "LOCK"  (OFF)  position  before
connecting 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.13Ab-44.

NO:

 Go to Step 3.

STEP 3. Engine stall reproduction test.

Q:Does the engine stall during the decrease in engine speed

after running?

YES:

 Go to Step 5.

NO:

 Go to Step 4.

STEP 4. Using scan tool MB991958, check actuator test.

(1)

Turn the ignition switch to the "ON" position.

(2)

Check  the  following  item  in  the  actuator  test.  Refer  to
Actuator Test Reference Table P.13Ab-857.

a
.

Item 10: Evaporative Emission Purge Solenoid.

(3)

Turn the ignition switch to the "LOCK" (OFF) position.

Q:Is the actuator operating properly?

YES:

 Go to Step 5.

NO:

 Repair or replace it. Then confirm that the

malfunction symptom is eliminated.

STEP 5. 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.13Ab-837.

a
.

Item 13: Throttle Position Sensor (main).

b
.

Item 15: Throttle Position Sensor (sub).

c
.

Item 11: Accelerator Pedal Position Sensor (main).

d
.

Item 12: Accelerator Pedal Position Sensor (sub).

13Ab-790

MULTIPORT INJECTION SYSTEM (MFI) <DIAGNOSIS>

SYMPTOM PROCEDURES