Mitsubishi Outlander (2013+). Manual - part 297

TROUBLESHOOTING

MULTIPOINT FUEL INJECTION (MPI)

13A-69

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. 4 injector itself.

• No. 4 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. 4 injector.

STEP 3. Perform voltage measurement at No. 4 
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. 4 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. 4 injector 
connector terminal and engine-ECU connector 
terminal INJ4.

• 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 INJ4 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. P0271: No. 4 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 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 coil current is more than 4.5 A with the injec-

tor driving.

FAIL-SAFE AND BACKUP FUNCTION

• None

PROBABLE CAUSES

• Failed No. 4 injector

TROUBLESHOOTING

MULTIPOINT FUEL INJECTION (MPI)

13A-70

• 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?

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. 4 injector itself.

• No. 4 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. 4 injector.

STEP 3. Check harness between No. 4 injector 
connector terminal and engine-ECU connector 
terminal INJ4.

• 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 INJ4 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. P0300: Random/Multiple Cylinder Misfire Detected

OPERATION

• Check code No. P0261: No. 1 injector circuit low 

input (Refer to 

P.13A-62

).

• Check code No. P0262: No. 1 injector circuit high 

input (Refer to 

P.13A-63

).

• Check code No. P0264: No. 2 injector circuit low 

input (Refer to 

P.13A-64

).

• Check code No. P0265: No. 2 injector circuit high 

input (Refer to 

P.13A-65

).

• Check code No. P0267: No. 3 injector circuit low 

input (Refer to 

P.13A-66

).

• Check code No. P0268: No. 3 injector circuit high 

input (Refer to 

P.13A-67

).

• Check code No. P0270: No. 4 injector circuit low 

input (Refer to 

P.13A-68

).

• Check code No. P0271: No. 4 injector circuit high 

input (Refer to 

P.13A-69

).

FUNCTION

• If a misfire occurs while the engine is running, the 

engine speed changes for an instant.

• The engine-ECU checks for such changes in 

engine speed.

TROUBLE JUDGMENT

Check Conditions

• Engine speed is more than 440 r/min and is less 

than 4,500 r/min.

• Engine coolant temperature is more than −10°C.

• Barometric pressure is more than 76 kPa.

• Volumetric efficiency is more than 20 % and is 

less than 40 %. <4B11>

• Volumetric efficiency is more than 30 % and is 

less than 60 %. <4B12>

• Adaptive learning is complete for the vane which 

generates a crankshaft position signal.

TROUBLESHOOTING

MULTIPOINT FUEL INJECTION (MPI)

13A-71

• While the engine is running, excluding gear shift-

ing, deceleration, sudden acceleration/decelera-
tion and A/C compressor switching.

• The throttle deviation is -0.06 V/10 ms to +0.06 

V/10 ms.

Judgement Criterion (change in the angular 

acceleration of the crankshaft is used for mis-
fire detection).

• Misfire has occurred more frequently than 

allowed during the last 200 revolutions (when the 
catalyst temperature is more than 1,000

°C).

or

• Misfire has occurred in 15 or more of the last 

1,000 revolutions (corresponding to 1.5 times the 
limit of emission standard).

FAIL-SAFE AND BACKUP FUNCTION

• The supply of fuel to the misfiring cylinder can 

possibly be cut.

PROBABLE CAUSES

• Ignition system related part(s) failed

• Failed crank angle sensor

• Failed injector

• Incorrect air-fuel ratio

• Low compression pressure

• Failed intake air temperature sensor

• Failed engine coolant temperature sensor

• Failed air flow sensor

• Skipping of timing chain teeth.

• Failed engine-ECU

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III data list

• Data list reference table (Refer to 

P.13A-155

).

a. Item 2: Crank angle sensor
b. Item 5: Intake air temperature sensor

c. Item 6: Engine coolant temperature sensor

d. Item 10: Air flow sensor
e. Item 26: Long-term fuel trim

f. Item 28: Short-term fuel trim

Q: Are the check results normal?

YES  : 

Go to Step 2.

NO : 

Perform the diagnosis code classified check 
procedure for the sensor that has shown an 
abnormal data value. Inspection chart for 
diagnosis code (Refer to 

P.13A-23

).

STEP 2. Visual check of ignition spark.

• Remove the spark plug and install it to the ignition 

coil.

• Connect the ignition coil connector.

• Disconnect all injector connectors.

• At the engine start, check each spark plug pro-

duces a spark.

Q: Is the check result normal?

YES : 

Go to Step 3.

NO : 

Check Inspection Procedure 

− ignition 

circuit system (Refer to 

P.13A-152

).

STEP 3. Check injector itself.

a. No. 1 injector connector
b. No. 2 injector connector

c. No. 3 injector connector

d. No. 4 injector connector
e. Injector check (Refer to 

P.13A-188

).

Q: Are the check results normal?

YES : 

Go to Step 4.

NO : 

Repair or replace the connector or replace 
the injector.

STEP 4. Check air intake from inlet hose and inlet 
manifold.

Q: Is the check result normal?

YES : 

Go to Step 5.

NO : 

Repair.

STEP 5. Fuel pressure measurement.

• Fuel pressure test (Refer to 

P.13A-179

)

Q: Is the check result normal?

YES : 

Go to Step 6.

NO : 

Repair.

STEP 6. Check for skipped timing chain teeth.

Q: Is the check result normal?

YES : 

Go to Step 7.

NO : 

Replace the timing chain.

STEP 7. Check compression pressure.

• Check the compression pressure (Refer to 

GROUP 11A 

− On-vehicle Service − Compres-

sion Pressure Check ).

Q: Is the check result normal?

YES : 

Go to Step 8.

NO : 

Repair.

TROUBLESHOOTING

MULTIPOINT FUEL INJECTION (MPI)

13A-72

STEP 8. Replace the engine-ECU.

• After replacing the engine-ECU, reconfirm 

whether the diagnosis code is set.

Q: Is the diagnosis code set?

YES : 

Check for foreign matters (water, diesel fuel, 

etc.) in fuel and replace if necessary.

NO : 

Check end.

Code No. P0301: No. 1 Cylinder Misfire Detected

OPERATION

• Check code No. P0261: No. 1 injector circuit low 

input (Refer to 

P.13A-62

).

• Check code No. P0262: No. 1 injector circuit high 

input (Refer to 

P.13A-63

).

FUNCTION

• If a misfire occurs while the engine is running, the 

engine speed changes for an instant.

• The engine-ECU checks for such changes in 

engine speed.

TROUBLE JUDGMENT

Check Conditions

• Engine speed is more than 440 r/min and is less 

than 4,500 r/min.

• Engine coolant temperature is more than −10°C. 

(However, 20

°C when the engine coolant temper-

ature at engine start is -10

°C or less).

• Barometric pressure is more than 76 kPa.

• Volumetric efficiency is more than 20 % and is 

less than 60 %. <4B11>

• Volumetric efficiency is more than 30 % and is 

less than 60 %. <4B12>

• Adaptive learning is complete for the vane which 

generates a crankshaft position signal.

• While the engine is running, excluding gear shift-

ing, deceleration, sudden acceleration/decelera-
tion and A/C compressor switching.

• The throttle deviation is -0.06 V/10 ms to +0.06 

V/10 ms.

Judgement Criterion (change in the angular 

acceleration of the crankshaft is used for mis-
fire detection).

• Misfire has occurred more frequently than 

allowed during the last 200 revolutions (when the 
catalyst temperature is more than 1,000

°C).

or

• Misfire has occurred a predetermined value (2%) 

or more in the first 1,000 revolutions from engine 
start-up (corresponding to 1.5 times the limit of 
emission standard).

or

• After the first 1,000 revolutions, the following cri-

terion is safisfied 4 times cumulatively.

• Misfire counts per 1,000 revolutions exceeds a 

predetermined value (2%) (corresponding to 1.5 
times the limit of emission standard).

FAIL-SAFE AND BACKUP FUNCTION

• The supply of fuel to the misfiring cylinder can 

possibly be cut.

PROBABLE CAUSES

• Ignition system related part(s) failed

• Failed No. 1 injector

• Harness damage in No. 1 injector circuit

• Low compression pressure

• Failed engine-ECU

DIAGNOSIS PROCEDURE

STEP 1. Visual check of ignition spark on No. 1 
cylinder. 

• Remove the spark plug and install it to the ignition 

coil.

• Connect the ignition coil connector.

• Disconnect all injector connectors.

• At the engine start, check spark plug produces a 

spark.

Q: Is the check result normal?

YES : 

Go to Step 2

NO : 

Check Inspection Procedure 

− ignition 

circuit system (Refer to 

P.13A-152

).

STEP 2. Check No. 1 injector itself.

• 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. 1 injector.