Mitsubishi Outlander GS45X. Manual — part 727

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-731

STEP 18. Using scan tool MB991958, check actuator test.
(1) Turn the ignition switch to the "ON" position.
(2) Check the following items in the actuator test. Refer to

Actuator Test Reference Table

P.13A-838

.

a. Item 9: Fuel pump

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

YES : Go to Step 19.
NO : Repair or replace it. Then confirm that the malfunction

symptom is eliminated.

STEP 19. Check the fuel pressure.
Refer to Fuel Pressure Test

P.13A-868

.

Q: Is the fuel pressure normal?

YES : Go to Step 20.
NO : Repair or replace it. Then confirm that the malfunction

symptom is eliminated.

STEP 20. Check the ignition system.
(1) Connect the timing light to terminal No. 3 of the ignition coil

connector B-01, B-19, B-04 or B-18 in order.

(2) Crank the engine.

• The timing light flashes.

(3) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Does the timing light flash?

YES : Go to Step 21.
NO : Refer to inspection procedure 25

− Ignition circuit

system

P.13A-807

.

STEP 21. 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 22.

STEP 22. 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 23.

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

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MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

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STEP 23. 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 24.
NO : Repair it. Then confirm that the malfunction symptom

is eliminated.

STEP 24. Check the ignition timing.
Refer to GROUP 11A, On-vehicle Service

− Ignition Timing

Check

P.11A-13

.

Q: Is the ignition timing normal?

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

defective items.

a. Check if the injectors are clogged.
b. Check if fuel is contaminated.

Then confirm that the malfunction symptom is

eliminated.

NO : Check for installed conditions of the timing chain.

Then confirm that the malfunction symptom is
eliminated.

Inspection procedure 5: Starts up and dies

.

COMMENT

• In such cases as the above, the cause is usually

improper air/fuel mixture. It is possible, though
less likely, that the spark plugs are generating
sparks but the sparks are weak.

.

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

• Malfunction of the fuel pump system.

• Malfunction of the ignition system.

• Malfunction of the injector system.

• Poor compression.

• Malfunction of the EGR system.

• Contaminated fuel.

• 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

.

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

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MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-733

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 DTC set?

YES : Refer to Diagnostic Trouble Code Chart

P.13A-49

.

NO : Go to Step 3.

STEP 3. 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 1: Power Supply Voltage
b. Item 6: Engine Coolant Temperature Sensor

(3) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the sensor 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 actuator test.
(1) Turn the ignition switch to the "ON" position.
(2) Check the following items in the actuator test. Refer to

Actuator Test Reference Table

P.13A-838

.

a. Item 9: Fuel Pump.

(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.

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

YES : Refer to Throttle Body (Throttle Valve Area) Cleaning

P.13A-865

.

NO : Go to Step 6.

STEP 6. 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 7.
NO : Check for installed conditions of the timing chain.

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 harness connector B-101, B-120, B-103,
B-116 at injector for damage.
Q: Is the harness connector in good condition?

YES : Go to Step 9.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection

P.00E-2

.Then confirm that the

malfunction symptom is eliminated.

STEP 9. Check the injector resistance.
(1) Disconnect the left bank injector connector B-101, B-120,

B-103, B-116.

(2) Measure the resistance between each injector side

connector terminal No. 1 and No. 2.

Standard value: 10.5

− 13.5 Ω [at 20°C (68°F)]

Q: Is the measured resistance between 10.5 and 13.5 ohms

[at 20

°C (68°F)]?

YES : Go to Step 10.
NO : Replace the faulty injector. Then confirm that the

malfunction symptom is eliminated.

AK604038

1 2

AB

Injector side
connector