Mitsubishi Outlander XL. Manual — part 399

(3)

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

Q:Are they operating properly?

YES:

Go to Step 6.

NO:

Repair or replace it. Then confirm that the

malfunction symptom is eliminated.

STEP 6. 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:

Check the ignition coil. Refer to GROUP 16, Ignition

System - Then confirm that the malfunction symptom is
eliminated.

INSPECTION PROCEDURE 14: Hesitation, sag, stumble, Poor acceleration or Surge.

M11310100291USA0000010001

COMMENT

｠

Defective ignition system, abnormal air/fuel ratio,
poor compression pressure, etc. are suspected.

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.

｠

Clogged air cleaner.

｠

Clogged exhaust system.

｠

Increased resistance to the transmission drive

｠

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-791

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. Using scan tool MB991958, check actuator test
items 1, 2, 3, 4, 5, 6: Injector.

(1)

Turn the ignition switch to the "ON" position.

(2)

Test Reference Table P.13Ab-857.

a
.

Item 01: Injector.

b
.

Item 103: Variable intake air solenoid

(3)

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

Q:Are thy operating properly?

YES:

Go to Step 4.

NO:

Repair or replace it. Then confirm that the

malfunction symptom is eliminated.

STEP 4. Check the ignition timing.

(1)

Refer to GROUP 11A, On-vehicle Service - Ignition Timing
Check P.11A-14.

Q:Is the ignition timing normal?

YES:

Go to Step 5.

NO:

Check for installed conditions of the timing belt.

Then confirm that the malfunction symptom is eliminated.

STEP 5. Using scan tool MB991958, check data list and
actuator test.

(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 05: Intake Air Temperature Sensor.

13Ab-792

MULTIPORT INJECTION SYSTEM (MFI) <DIAGNOSIS>

SYMPTOM PROCEDURES

b
.

Item 06: Engine Coolant Temperature Sensor.

c
.

Item 13: Throttle Position Sensor (main).

d
.

Item 15: Throttle Position Sensor (sub).

e
.

Item 11: Accelerator Pedal Position Sensor (main).

f
.

Item 12: Accelerator Pedal Position Sensor (sub).

(3)

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

Q:Are they operating properly?

YES:

Go to Step 6.

NO:

Repair or replace it. Then confirm that the

malfunction symptom is eliminated.

STEP 6. Check the fuel pressure.
Refer to Fuel Pressure Test P.13Aa-17.

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 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 8.

STEP 8. 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.

NO:

Go to Step 9.

STEP 9. 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.

b
.

Clogged air cleaner.

c
.

Clogged exhaust system.

MULTIPORT INJECTION SYSTEM (MFI) <DIAGNOSIS>

13Ab-793

SYMPTOM PROCEDURES

d
.

Check if fuel is contaminated.

e
.

Check if the injectors are clogged.

f
.

Check if the foreign materials (water, kerosene, etc.) got into
fuel.

g
.

Increased resistance to the transmission drive

Then confirm that the malfunction symptom is eliminated.

NO:

Repair it. Then confirm that the malfunction symptom

is eliminated.

INSPECTION PROCEDURE 15: Acceleration shock.

M11310100292USA0000010000

COMMENT

｠

There may be an ignition leak accompanying the
increase in the spark plug demand voltage during
acceleration.

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

｠

Malfunction of the ignition 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. 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 2.

13Ab-794

MULTIPORT INJECTION SYSTEM (MFI) <DIAGNOSIS>

SYMPTOM PROCEDURES