Mitsubishi Outlander (2013+). Manual — part 298

TROUBLESHOOTING

MULTIPOINT FUEL INJECTION (MPI)

13A-73

STEP 3. Check harness between engine control
relay connector terminal and No. 1 injector
connector terminal power supply line.

• Check power supply line for damage.

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. Check harness between No. 1 injector
connector terminal and engine-ECU connector
terminal INJ1.

• Check output 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 compression pressure of No. 1
cylinder.

• 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 6

NO :

Repair.

STEP 6. M.U.T.-III diagnosis code

• Reconfirmation of diagnosis code.

Q: Is the diagnosis code set?

YES :

Replace the engine-ECU.

NO :

Intermittent malfunction (Refer to GROUP
00

− How to Use

Troubleshooting/Inspection Service Points

−

How to Cope with Intermittent Malfunctions
).

Code No. P0302: No. 2 Cylinder Misfire Detected

OPERATION

• 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

).

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. 2 injector

• Harness damage in No. 2 injector circuit

• Low compression pressure

• Failed engine-ECU

TROUBLESHOOTING

MULTIPOINT FUEL INJECTION (MPI)

13A-74

DIAGNOSIS PROCEDURE

STEP 1. Visual check of ignition spark on No. 2
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. 2 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. 2 injector.

STEP 3. 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 4

NO :

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

STEP 4. Check harness between No. 2 injector
connector terminal and engine-ECU connector
terminal INJ2.

• Check output 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 compression pressure of No. 2
cylinder.

• 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 6

NO :

Repair.

STEP 6. M.U.T.-III diagnosis code

• Reconfirmation of diagnosis code.

Q: Is the diagnosis code set?

YES :

Replace the engine-ECU.

NO :

Intermittent malfunction (Refer to GROUP
00

− How to Use

Troubleshooting/Inspection Service Points

−

How to Cope with Intermittent Malfunctions
).

Code No. P0303: No. 3 Cylinder Misfire Detected

OPERATION

• 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

).

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.

TROUBLESHOOTING

MULTIPOINT FUEL INJECTION (MPI)

13A-75

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. 3 injector

• Harness damage in No. 3 injector circuit

• Low compression pressure

• Failed engine-ECU

DIAGNOSIS PROCEDURE

STEP 1. Visual check of ignition spark on No. 3
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. 3 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, replace the
No. 3 injector.

STEP 3. 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 4

NO :

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

STEP 4. Check harness between No. 3 injector
connector terminal and engine-ECU connector
terminal INJ3.

• Check output 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 compression pressure of No. 3
cylinder.

• 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 6

NO :

Repair.

STEP 6. M.U.T.-III diagnosis code

• Reconfirmation of diagnosis code.

Q: Is the diagnosis code set?

YES :

Replace the engine-ECU.

NO :

Intermittent malfunction (Refer to GROUP
00

− How to Use

Troubleshooting/Inspection Service Points

−

How to Cope with Intermittent Malfunctions
).

Code No. P0304: No. 4 Cylinder Misfire Detected

OPERATION

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

input (Refer to

P.13A-68

).

TROUBLESHOOTING

MULTIPOINT FUEL INJECTION (MPI)

13A-76

• 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.

(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. 4 injector

• Harness damage in No. 4 injector circuit

• Low compression pressure

• Failed engine-ECU

DIAGNOSIS PROCEDURE

STEP 1. Visual check of ignition spark on No. 4
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. 4 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. 4 injector.

STEP 3. 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 4

NO :

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

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

• Check output 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.