Mitsubishi Outlander GS45X. Manual — part 957

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-761

STEP 14. Check harness connector B-21 at intermediate
connector for damage.
Q: Is the harness connector in good condition?

YES : Go to Step 15.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection

P.00E-2

. Then confirm that the

malfunction symptom is eliminated.

STEP 15. Check harness connector B-10 at ECM and
harness connector B-115, B-116, B-120 at left bank injector
for damage.
Q: Is the harness connector in good condition?

YES : Go to Step 16.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection

P.00E-2

. Then confirm that the

malfunction symptom is eliminated.

STEP 16. Check for harness damage between injector
connector and ECM connector.
(1) Disconnect the injector connector and ECM connector.
(2) Measure the resistance between injector connector and

ECM connector.

a. Injector connector B-101 (terminal No. 2) and ECM con-

nector B-10 (terminal No. 2) at No. 1 cylinder injector.

b. Injector connector B-120 (terminal No. 2) and ECM con-

nector B-10 (terminal No. 3) at No. 2 cylinder injector.

c. Injector connector B-103 (terminal No. 2) and ECM con-

nector B-10 (terminal No. 18) at No. 3 cylinder injector.

d. Injector connector B-116 (terminal No. 2) and ECM con-

nector B-10 (terminal No. 19) at No. 4 cylinder injector.

e. Injector connector B-104 (terminal No. 2) and ECM con-

nector B-10 (terminal No. 50) at No. 5 cylinder injector.

f. Injector connector B-115 (terminal No. 2) and ECM con-

nector B-10 (terminal No. 51) at No. 6 cylinder injector.

• Should be less than 2 ohms.

Q: Is the measured resistance less than 2 ohms?

YES : Go to Step 17.
NO : Repair it. Then confirm that the malfunction symptom

is eliminated.

AK700206

M

1

2

16 15 14 13 12 11 10 9 8 7 6 5 4 3

2

1

32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17

48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33

64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49

B-101, B-103, B-104,
B-115, B-116,B-120
harness connector:
component side

AB

B-10 harness
connector:
component side

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

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MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-762

STEP 17. Check the ignition system.
(1) Connect the timing light to terminal No. 1 of the ignition coil

connector B-01, B-04, B-05, B-15, B-18 or B-19 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 18.
NO : Refer to INSPECTION PROCEDURE 24

− Ignition

Circuit System

P.13B-823

.

STEP 18. 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 19.

STEP 19. 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 20.

STEP 20. Check the compression pressure.
Refer to GROUP 11C, On-vehicle Service

− Compression

Pressure Check

P.11C-18

.

Q: Is the compression pressure normal?

YES : Go to Step 21.
NO : Repair it. Then confirm that the malfunction symptom

is eliminated.

STEP 21. Check the ignition timing.
(1) Check the ignition timing at cranking.

Standard value: 5

° BTDC ± 3°

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 belt. Then

confirm that the malfunction symptom is eliminated.

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

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MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-763

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.

• 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 DTC set?

YES : Refer to Diagnostic Trouble Code Chart

P.13B-50

.

NO : Go to Step 3.

AK700568AB

MB991824

MB991827

MB991910

Data link
connector

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

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MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-764

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.13B-836

.

a. Item 1: Power Supply Voltage (at Cranking)
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.13B-858

.

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.

STEP 5. Check the ignition timing.
(1) Check the ignition timing at cranking.

Standard value: 5

° BTDC ± 3°

Q: Is the ignition timing normal?

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

confirm that the malfunction symptom is eliminated.

STEP 6. Check the left bank injector resistance.
(1) Disconnect the left bank injector connector B-115, B-116,

B-120.

(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 7.
NO : Replace the faulty injector. Then confirm that the

malfunction symptom is eliminated.

AK700204

1 2

AB

Injector side
connector