Mitsubishi Outlander (2013+). Manual - part 296

TROUBLESHOOTING

MULTIPOINT FUEL INJECTION (MPI)

13A-65

STEP 3. Perform voltage measurement at No. 2 
injector connector.

• Disconnect connector, and measure at harness 

side.

• Ignition switch: "ON"

• Voltage between terminal power supply line and 

body earth.

OK: System voltage

Q: Is the check result normal?

YES : 

Go to Step 5.

NO : 

Go to Step 4.

STEP 4. Check harness between engine control 
relay connector terminal and No. 2 injector 
connector terminal power supply line.

• Check power supply line for damage.

Q: Is the check result normal?

YES : 

Go to Step 5.

NO : 

Repair or replace the connector, or repair 
the damaged harness wire.

STEP 5. Check harness between No. 2 injector 
connector terminal and engine-ECU connector 
terminal INJ2.

• Check output line for open/short circuit and dam-

age.

Q: Is the check result normal?

YES : 

Go to Step 6.

NO : 

Repair or replace the connector, or repair 
the damaged harness wire.

STEP 6. Perform signal wave pattern 
measurement at engine-ECU connector (Using 
an oscilloscope).

• Disconnect engine-ECU connector, and connect 

special tool power plant ECU check harness 
(MB992110) to measure at connector for inspec-
tion.

• Engine: Idling

• Transmission: P range

• Voltage between terminal INJ2 and body earth.

OK: Waveforms should be displayed on 
inspection procedure using an oscilloscope 
(Refer to 

P.13A-174

).

Q: Is the check result normal?

YES : 

Intermittent malfunction (Refer to GROUP 

00 

− How to Use 

Troubleshooting/Inspection Service Points 

− 

How to Cope with Intermittent Malfunctions 
).

NO : 

Replace the engine-ECU.

Code No. P0265: No. 2 Injector Circuit High Input

OPERATION

• Power is supplied to the injector connector termi-

nal from the engine control relay connector termi-
nal.

• The engine-ECU connector terminal INJ2 makes 

the power transistor in the unit be in ON position, 
and that makes currents go on the injector con-
nector terminal.

FUNCTION

• The engine-ECU controls the power supply inter-

val of the injector.

• The fuel injection amount of the injector depends 

on the power supply interval.

TROUBLE JUDGMENT

Check Condition

• Engine is running.

Judgement Criterion

• The coil current is more than 4.5 A with the injec-

tor driving.

FAIL-SAFE AND BACKUP FUNCTION

• None

PROBABLE CAUSES

• Failed No. 2 injector

• Open/short circuit or harness damage in No. 2 

injector circuit or loose connector contact

• Failed engine-ECU

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III actuator test

• Item 1: No. 2 injector

OK: Idling state varies.

Q: Is the check result normal?

TROUBLESHOOTING

MULTIPOINT FUEL INJECTION (MPI)

13A-66

YES : 

Intermittent malfunction (Refer to GROUP 

00 

− How to Use 

Troubleshooting/Inspection Service Points 

− 

How to Cope with Intermittent Malfunctions 
).

NO : 

Go to Step 2.

STEP 2. Check No. 2 injector itself.

• No. 2 Injector connector check.

• Injector check (Refer to 

P.13A-188

).

Q: Is the check result normal?

YES : 

Go to Step 3.

NO : 

Repair or replace the connector, or replace 
the No. 2 injector.

STEP 3. Check harness between No. 2 injector 
connector terminal and engine-ECU connector 
terminal INJ2.

• Check output line for open/short circuit and dam-

age.

Q: Is the check result normal?

YES : 

Go to Step 4.

NO : 

Repair or replace the connector, or repair 
the damaged harness wire.

STEP 4. Perform signal wave pattern 
measurement at engine-ECU connector (Using 
an oscilloscope).

• Disconnect engine-ECU connector, and connect 

special tool power plant ECU check harness 
(MB992110) to measure at connector for inspec-
tion.

• Engine: Idling

• Transmission: P range

• Voltage between terminal INJ2 and body earth.

OK: Waveforms should be displayed on 
inspection procedure using an oscilloscope 
(Refer to 

P.13A-174

).

Q: Is the check result normal?

YES : 

Intermittent malfunction (Refer to GROUP 

00 

− How to Use 

Troubleshooting/Inspection Service Points 

− 

How to Cope with Intermittent Malfunctions 
).

NO : 

Replace the engine-ECU.

Code No. P0267: No. 3 Injector Circuit Low Input

OPERATION

• Power is supplied to the injector connector termi-

nal from the engine control relay connector termi-
nal.

• The engine-ECU connector terminal INJ3 makes 

the power transistor in the unit be in ON position, 
and that makes currents go on the injector con-
nector terminal.

FUNCTION

• The engine-ECU controls the power supply inter-

val of the injector.

• The fuel injection amount of the injector depends 

on the power supply interval.

TROUBLE JUDGMENT

Check Condition

• Engine is running.

Judgement Criterion

• The supply voltage is less than 3 V without the 

injector driving.

FAIL-SAFE AND BACKUP FUNCTION

• None

PROBABLE CAUSES

• Failed No. 3 injector

• Open/short circuit or harness damage in No. 3 

injector circuit or loose connector contact

• Failed engine-ECU

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III actuator test

• Item 1: No. 3 injector

OK: Idling state varies.

Q: Is the check result normal?

YES : 

Intermittent malfunction (Refer to GROUP 

00 

− How to Use 

Troubleshooting/Inspection Service Points 

− 

How to Cope with Intermittent Malfunctions 
).

NO : 

Go to Step 2.

STEP 2. Check No. 3 injector itself.

• No.3 Injector connector check.

• Injector check (Refer to 

P.13A-188

).

Q: Is the check result normal?

TROUBLESHOOTING

MULTIPOINT FUEL INJECTION (MPI)

13A-67

YES : 

Go to Step 3.

NO : 

Repair or replace the connector, or replace 
the No. 3 injector.

STEP 3. Perform voltage measurement at No. 3 
injector connector.

• Disconnect connector, and measure at harness 

side.

• Ignition switch: "ON"

• Voltage between terminal power supply line and 

body earth.

OK: System voltage

Q: Is the check result normal?

YES : 

Go to Step 5.

NO : 

Go to Step 4.

STEP 4. Check harness between engine control 
relay connector terminal and No. 3 injector 
connector terminal power supply line.

• Check power supply line for damage.

Q: Is the check result normal?

YES : 

Go to Step 5.

NO : 

Repair or replace the connector, or repair 
the damaged harness wire.

STEP 5. Check harness between No. 3 injector 
connector terminal and engine-ECU connector 
terminal INJ3.

• Check output line for open/short circuit and dam-

age.

Q: Is the check result normal?

YES : 

Go to Step 6.

NO : 

Repair or replace the connector, or repair 
the damaged harness wire.

STEP 6. Perform signal wave pattern 
measurement at engine-ECU connector (Using 
an oscilloscope).

• Disconnect engine-ECU connector, and connect 

special tool power plant ECU check harness 
(MB992110) to measure at connector for inspec-
tion.

• Engine: Idling

• Transmission: P range

• Voltage between terminal INJ3 and body earth.

OK: Waveforms should be displayed on 
inspection procedure using an oscilloscope 
(Refer to 

P.13A-174

).

Q: Is the check result normal?

YES : 

Intermittent malfunction (Refer to GROUP 

00 

− How to Use 

Troubleshooting/Inspection Service Points 

− 

How to Cope with Intermittent Malfunctions 
).

NO : 

Replace the engine-ECU.

Code No. P0268: No. 3 Injector Circuit High Input

OPERATION

• Power is supplied to the injector connector termi-

nal from the engine control relay connector termi-
nal.

• The engine-ECU connector terminal INJ3 makes 

the power transistor in the unit be in ON position, 
and that makes currents go on the injector con-
nector terminal.

FUNCTION

• The engine-ECU controls the power supply inter-

val of the injector.

• The fuel injection amount of the injector depends 

on the power supply interval.

TROUBLE JUDGMENT

Check Condition

• Engine is running.

Judgement Criterion

• The coil current is more than 4.5 A with the injec-

tor driving.

FAIL-SAFE AND BACKUP FUNCTION

• None

PROBABLE CAUSES

• Failed No. 3 injector

• Open/short circuit or harness damage in No. 3 

injector circuit or loose connector contact

• Failed engine-ECU

TROUBLESHOOTING

MULTIPOINT FUEL INJECTION (MPI)

13A-68

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III actuator test

• Item 1: No. 3 injector

OK: Idling state varies.

Q: Is the check result normal?

YES : 

Intermittent malfunction (Refer to GROUP 

00 

− How to Use 

Troubleshooting/Inspection Service Points 

− 

How to Cope with Intermittent Malfunctions 
).

NO : 

Go to Step 2.

STEP 2. Check No. 3 injector itself.

• No. 3 Injector connector check.

• Injector check (Refer to 

P.13A-188

).

Q: Is the check result normal?

YES : 

Go to Step 3.

NO : 

Repair or replace the connector, or replace 
the No. 3 injector.

STEP 3. Check harness between No. 3 injector 
connector terminal and engine-ECU connector 
terminal INJ3.

• Check output line for open/short circuit and dam-

age.

Q: Is the check result normal?

YES : 

Go to Step 4.

NO : 

Repair or replace the connector, or repair 
the damaged harness wire.

STEP 4. Perform signal wave pattern 
measurement at engine-ECU connector (Using 
an oscilloscope).

• Disconnect engine-ECU connector, and connect 

special tool power plant ECU check harness 
(MB992110) to measure at connector for inspec-
tion.

• Engine: Idling

• Transmission: P range

• Voltage between terminal INJ3 and body earth.

OK: Waveforms should be displayed on 
inspection procedure using an oscilloscope 
(Refer to 

P.13A-174

).

Q: Is the check result normal?

YES : 

Intermittent malfunction (Refer to GROUP 

00 

− How to Use 

Troubleshooting/Inspection Service Points 

− 

How to Cope with Intermittent Malfunctions 
).

NO : 

Replace the engine-ECU.

Code No. P0270: No. 4 Injector Circuit Low Input

OPERATION

• Power is supplied to the injector connector termi-

nal from the engine control relay connector termi-
nal.

• The engine-ECU connector terminal INJ4 makes 

the power transistor in the unit be in ON position, 
and that makes currents go on the injector con-
nector terminal.

FUNCTION

• The engine-ECU controls the power supply inter-

val of the injector.

• The fuel injection amount of the injector depends 

on the power supply interval.

TROUBLE JUDGMENT

Check Condition

• Engine is running.

Judgement Criterion

• The supply voltage is less than 3 V without the 

injector driving.

FAIL-SAFE AND BACKUP FUNCTION

• None

PROBABLE CAUSES

• Failed No. 4 injector

• Open/short circuit or harness damage in No. 4 

injector circuit or loose connector contact

• Failed engine-ECU

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III actuator test

• Item 1: No. 4 injector

OK: Idling state varies.

Q: Is the check result normal?