Mitsubishi Outlander XL. Manual - part 391

｠

Malfunction of the fuel pump system.

｠

Malfunction of the ignition system.

｠

Malfunction of the injector system.

｠

Poor compression

｠

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. 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 after cranking the
engine for at least 2 sec.

(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.13Ab-44.

NO:

 Go to Step 2.

STEP 2. Check harness connector A-24X at injector relay for
damage.

Q:Is the connector in good condition?

YES:

 Go to Step 3.

NO:

 Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection P.00E-2. Then confirm that the
malfunction symptom is eliminated.

STEP 3. Check the injector relay.

(1)

Remove the injector relay.

MULTIPORT INJECTION SYSTEM (MFI) <DIAGNOSIS>

13Ab-759

SYMPTOM PROCEDURES

ZK603860

Injector relay side connector

AA00

1

2

3
4

(2)

Check for continuity between the injector relay terminals No.
1 and No. 2.

｠

There should be continuity. (approximately 2 ohms)

ZK603861

1

2

3
4

Injector relay side connector

AA00

(3)

Use jumper wires to connect injector relay terminal No. 1 to
the  positive  battery  terminal  and  terminal  No.  2  to  the
negative battery terminal.

(4)

Check for continuity between the injector relay terminals No.
3 and No. 4 while connecting and disconnecting the jumper
wire at the negative battery terminal.

｠

Should  be  less  than  2  ohms.  (Negative  battery  terminal
connected)

｠

Should  be  open  loop.  (Negative  battery  terminal
disconnected)

(5)

Install the MFI relay.

Q:Is the measured resistance within the specified range?

YES:

 Go to Step 4.

NO:

 Replace the injector relay. Then confirm that the

malfunction symptom is eliminated.

STEP 4. Measure the power supply voltage at injector relay
harness side connector A-24X.

(1)

Disconnect the connector A-24X and measure at the harness
side.

2

1

3
4

ZK603862

A-24X harness 
connector: 
component side

AA00

(2)

Measure the voltage between terminal No. 4 and ground.

｠

Voltage should measure battery positive voltage.

Q:Is  battery  positive  voltage  (approximately  12  volts)

present?

YES:

 Go to Step 5.

NO:

 Repair harness wire between MFI relay connector A-33X

(terminal No. 2) and injector relay connector A-24X
(terminal No. 4) because of open circuit or harness
damage. Then confirm that the malfunction symptom is
eliminated.

STEP 5. Measure the power supply voltage at injector relay
harness side connector A-24X.

(1)

Disconnect the connector A-24X and measure at the harness
side.

(2)

Turn the ignition switch to the "ON" position.

13Ab-760

MULTIPORT INJECTION SYSTEM (MFI) <DIAGNOSIS>

SYMPTOM PROCEDURES

ZK603863

2

1

3
4

A-24X harness
connector: 
component side

AA00

(3)

Measure the voltage between terminal No. 1 and ground.

｠

Voltage should be battery positive voltage.

(4)

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

Q:Is  battery  positive  voltage  (approximately  12  volts)

present?

YES:

 Go to Step 6.

NO:

 Repair harness wire between ETACS-ECU connector

C-304 (terminal No. 10) and injector relay connector
A-24X (terminal No. 1) because of open circuit or harness
damage. Then confirm that the malfunction symptom is
eliminated.

STEP 6. Check for continuity at injector relay harness side
connector A-24X.

(1)

Disconnect the connector A-24X and measure at the harness
side.

ZK603864

2

1

3
4

A-24X harness
connector: 
component side

AA00

(2)

Check for the continuity between terminal No. 2 and ground.

｠

Should be less than 2 ohms.

Q:Does continuity exist?

YES:

 Go to Step 7.

NO:

 Repair harness wire between injector relay connector

A-24X (terminal No. 2) and ground because of open circuit
or harness damage. Then confirm that the malfunction
symptom is eliminated.

STEP 7. 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 01: Power Supply Voltage (at cranking).

(3)

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

Q:Are they operating properly?

YES:

 Go to Step 8.

NO:

 Repair or replace it. Then confirm that the

malfunction symptom is eliminated.

STEP 8. 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.13Ab-857.

a
.

Item 09: Fuel pump.

(3)

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

Q:Is the actuator operating properly?

YES:

 Go to Step 9.

NO:

 Repair or replace it. Then confirm that the

malfunction symptom is eliminated.

STEP 9. Check the fuel pressure.
Refer to Fuel Pressure Test P.13Aa-17.

MULTIPORT INJECTION SYSTEM (MFI) <DIAGNOSIS>

13Ab-761

SYMPTOM PROCEDURES

Q:Is the fuel pressure normal?

YES:

 Go to Step 10.

NO:

 Check the following items, and repair or replace the

defective items.

｠

Insufficient fuel pump discharge.

｠

Fuel pump filter clogged.

STEP 10. Check the left bank injector resistance.

(1)

Disconnect  the  left  bank  injector  connector  B-115,  B-116,
B-120.

ZK603186AA00

Injector side
connector

1 2

(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 11.

NO:

 Replace the faulty injector. Then confirm that the

malfunction symptom is eliminated.

STEP 11. Check the right bank injector resistance at
intermediate connector B-21.

(1)

Disconnect the intermediate connector B-21.

ZK603187AA00

B-21
Injector side
connector

1

2

3

6

7

8

4

5

9 10

(2)

Measure the resistance between each male connector side
terminal.

a
.

Measure the resistance between terminal No. 6 and No. 7
at No. 1 cylinder injector.

b
.

Measure the resistance between terminal No. 6 and No. 8
at No. 3 cylinder injector.

c
.

Measure the resistance between terminal No. 6 and No. 9
at No. 5 cylinder injector.

｠

Resistance should be between 10.5 and 13.5 ohms [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 14.

NO:

 Go to Step 12.

STEP 12. Check the right bank injector resistance.

(1)

Remove the intake manifold.

(2)

Disconnect the right bank injector connector, which deviates
from the standard value at Step 11.

13Ab-762

MULTIPORT INJECTION SYSTEM (MFI) <DIAGNOSIS>

SYMPTOM PROCEDURES