Mitsubishi Outlander GS45X. Manual — part 734

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-759

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.

STEP 3. Using scan tool MB991958, read the diagnostic
trouble code (DTC).
NOTE: When the CVT has a malfunction, the TCM might out-
put the request signal of reducing the engine torque in order to
protect the CVT.
(1) Turn the ignition switch to the "ON" position.
(2) Read the TCM-DTC.
(3) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the TCM-DTC set?

YES : Refer to GROUP 23A, Diagnosis

− Diagnostic

Trouble Code Chart

P.23A-29

.

NO : Go to Step 4 .

STEP 4. Using scan tool MB991958, check actuator test
item 1: injector.
(1) Turn the ignition switch to the "ON" position.
(2) Test Reference Table

P.13A-838

.

a. Item 1: Injector.

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

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

symptom is eliminated.

AK700568AB

MB991824

MB991827

MB991910

Data link
connector

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

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MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

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STEP 5. Check the ignition timing.
(1) Refer to GROUP 11A, On-vehicle Service

− Ignition Timing

Check

P.11A-13

.

Q: Is the ignition timing normal?

YES : Go to Step 6.
NO : Check for installed conditions of the timing chain.

Then confirm that the malfunction symptom is
eliminated.

STEP 6. 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.13A-818

.

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

c. Item 11: Accelerator Pedal Position Sensor (main).

d. Item 12: Accelerator Pedal Position Sensor (sub).
e. Item 13: Throttle Position Sensor (main).

f. Item 15: Throttle Position Sensor (sub).

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

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

symptom is eliminated.

STEP 7. Check the fuel pressure.
Refer to Fuel Pressure Test

P.13A-868

.

Q: Is the fuel pressure normal?

YES : Go to Step 8.
NO : Repair or replace it. Then confirm that the malfunction

symptom is eliminated.

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.
(1) Remove the intake manifold.
(2) 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.

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

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MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-761

STEP 10. Check the positive crankcase ventilation system.
Refer to GROUP 17, Emission Control System

− Positive

Crankcase Ventilation System

− Positive Crankcase Ventilation

System Check

P.17-74

.

Q: Is the positive crankcase ventilation system?

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

defective items.

a. Vacuum leak.
b. Clogged air cleaner.

c. Clogged exhaust system.

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.

Then confirm that the malfunction symptom is

eliminated.

NO : Repair it. Then confirm that the malfunction symptom

is eliminated.

Inspection procedure 15: Acceleration shock

.

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 CVT 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

NOTE: To protect the CVT, the TCM outputs, into the ECM, the
request signal to reduce the engine torque according to the
operation condition. Based on the signal, the ECM closes the
throttle valve, retards the ignition or carries out fuel cut. At that
time, the engine output seems to temporarily reduce, but there
is no malfunction.

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-762

STEP 1. 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 2.

STEP 2. Using scan tool MB991958, read the diagnostic
trouble code (DTC).
NOTE: When the CVT has a malfunction, the TCM might out-
put the request signal of reducing the engine torque in order to
protect the CVT.
(1) Turn the ignition switch to the "ON" position.
(2) Read the TCM-DTC.
(3) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the TCM-DTC set?

YES : Refer to GROUP 23A, Diagnosis

− Diagnostic

Trouble Code Chart

P.23A-29

.

NO : Go to Step 3 .

STEP 3. 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 4.

AK700568AB

MB991824

MB991827

MB991910

Data link
connector