Mitsubishi Outlander GS45X. Manual — part 621

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-307

STEP 4. Measure the power supply voltage at No. 2
cylinder injector connector.
(1) Disconnect connector B-120 and measure at the harness

side.

(2) Turn the ignition switch to the "ON" position.
(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 14.
NO : Go to Step 5.

STEP 5. Check harness connector A-24X at injector relay
for damage.
Q: Is the harness connector in good condition?

YES : Go to Step 6.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection

P.00E-2

. Then go to Step 20.

STEP 6. Check the injector relay.
(1) Remove the injector relay.
(2) Check for continuity between the injector relay terminal No.

1 and No. 2.
There should be continuity.

(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 terminal No.

3 and No. 4 while connecting and disconnecting the jumper
wire at the negative battery terminal.

• Continuity (2 ohms or less). <Negative battery terminal

connected>

• Should be open loop. <Negative battery terminal discon-

nected>

(5) Install the injector relay.
Q: Is the measured resistance normal?

YES : Go to Step 7.
NO : Replace the injector relay. Then go to Step 20.

AK604192

M

1

2

AC

B-120 harness
connector:
component side

AK604033

1

2

3
4

Injector relay side connector

AB

AK604034

1

2

3
4

AB

Injector relay side connector

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-308

STEP 7. Check for continuity at injector relay harness side
connector A-24X.
(1) Disconnect the connector A-24X and measure at the

harness side.

(2) Check for the continuity between terminal No. 2 and

ground.

• Continuity (2 ohms or less).

Q: Does continuity exist?

YES : Go to Step 8.
NO : Repair harness wire between injector relay connector

A-24X (terminal No. 2) and ground because of open
circuit or harness damage. Then go to Step 20.

STEP 8. 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.
(3) Measure the voltage between terminal No. 1 and ground.

• Voltage should be battery positive voltage.

Q: Is battery positive voltage (approximately 12 volts)

present?
YES : Go to Step 10.
NO : Go to Step 9.

STEP 9. Check harness connector C-304 at ETACS-ECU for
damage.
Q: Is the harness connector in good condition?

YES : Repair harness wire between injector relay connector

A-24X (terminal No. 1) and ETACS-ECU connector
C-304 (terminal No. 10) because of open circuit or
short circuit to ground. Then go to Step 20.

NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection

P.00E-2

. Then go to Step 20.

AK604037

2

1

3
4

AC

A-24X harness
connector:
component side

AK604036

2

1

3
4

AC

A-24X harness
connector:
component side

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-309

STEP 10. 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.
(3) Measure the voltage between terminal No. 4 and ground.

• Voltage should be battery positive voltage.

Q: Is battery positive voltage (approximately 12 volts)

present?
YES : Go to Step 12.
NO : Go to Step 11.

STEP 11. Check harness connector A-33X at MFI relay for
damage.
Q: Is the harness connector in good condition?

YES : 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
short circuit to ground. Then go to Step 20.

NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection

P.00E-2

. Then go to Step 20.

STEP 12. Check for open circuit and short circuit to
ground between injector relay connector A-24X (terminal
No. 3) and No. 2 cylinder injector connector B-120
(terminal No. 1).
NOTE: Check harness after checking intermediate connector
A-13. If intermediate connector is damaged, repair or replace it.
Refer to GROUP 00E, Harness Connector Inspection

P.00E-2

.

Then go to Step 20 .
Q: Is the harness wire in good condition?

YES : Go to Step 13.
NO : Repair it. Then go to Step 20.

STEP 13. Check harness connector C-304 at ETACS-ECU
for damage.
Q: Is the harness connector in good condition?

YES : Repair harness wire between injector relay connector

A-24X (terminal No. 1) and ETACS-ECU connector
C-304 (terminal No. 10) because of harness damage.
Then go to Step 20.

NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection

P.00E-2

. Then go to Step 20.

2

1

3
4

AK604035 AC

A-24X harness
connector:
component side

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-310

STEP 14. Check harness connector A-33X at MFI relay 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 go to Step 20.

STEP 15. Check for harness damage between MFI relay
connector A-33X (terminal No. 2) and injector relay
connector A-24X (terminal No. 4).
Q: Is the harness wire in good condition?

YES : Go to Step 16.
NO : Repair it. Then go to Step 20.

STEP 16. Check for harness damage between injector
relay connector A-24X (terminal No. 3) and No. 2 cylinder
injector connector B-120 (terminal No. 1).
NOTE: Check harness after checking intermediate connector
A-13. If intermediate connector is damaged, repair or replace it.
Refer to GROUP 00E, Harness Connector Inspection

P.00E-2

.

Then go to Step 20 .
Q: Is the harness wire in good condition?

YES : Go to Step 17.
NO : Repair it. Then go to Step 20.

STEP 17. Check harness connector B-10 at ECM for
damage.
Q: Is the harness connector in good condition?

YES : Go to Step 18.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection

P.00E-2

. Then go to Step 20.

STEP 18. Check for open circuit, short circuit to ground
and harness damage between No. 2 cylinder injector
connector B-120 (terminal No. 2) and ECM connector B-10
(terminal No. 3).
Q: Is the harness wire in good condition?

YES : Go to Step 19.
NO : Repair it. Then go to Step 20.