Mitsubishi L200. Manual — part 95

TROUBLESHOOTING

DIESEL FUEL

13A-176

DIAGNOSIS PROCEDURE

CAUTION

A high-tension voltage is flowing between the
engine-ECU and the injectors while the engine is
running. Handle them carefully to avoid receiving
electric shocks from the voltage.

STEP 1. Connector check: A-129 No. 4 injector
connector

Q: Is the check result normal?

YES :

Go to Step 2 .

NO :

Repair or replace the connector.

STEP 2. Check No. 4 injector itself.

• Check No. 4 injector itself (Refer to

P.13A-595

).

Q: Is the check result normal?

YES :

Go to Step 3 .

NO :

Replace the No. 4 injector. After replacing
the Injector, register the injector
identification code and learn fuel injection
(Refer to GROUP 00

− Precautions Before

Service

− What The Common Rail Engine

Learns ).

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

Check harness between A-129 (terminal No. 1) No. 4
injector connector and C-105 (terminal No. 27)
engine-ECU connector.

• Check earthing line for open/short circuit and

damage.

Q: Are the check results normal?

YES :

Go to Step 4 .

NO :

Repair the damaged harness wire.

AKA00189

1

2

Connector: A-129

Harness side
connector

AB

A-129 (GR)

AKA00189

1

2

Connector: A-129

Harness side
connector

AB

A-129 (GR)

AKA00089

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C-105 (B)

C-105 (B)

<R.H. drive vehicles>

Harness side connector

<L.H. drive vehicles>

Connector: C-105

AB

TROUBLESHOOTING

DIESEL FUEL

13A-177

STEP 4. Check harness between A-129 (terminal
No. 2) No. 4 injector connector and C-105
(terminal No. 1) engine-ECU connector.

• Check power supply line for open/short circuit

and damage.

Q: Is the check result normal?

YES :

Go to Step 5 .

NO :

Repair or replace the connector.

STEP 5. Connector check: C-105 engine-ECU
connector

Q: Is the check result normal?

YES :

Go to Step 6 .

NO :

Repair or replace the connector.

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

• Reconfirmation of diagnosis code.

Q: Is the diagnosis code set?

YES :

Replace the engine-ECU. When the engine-

ECU is replaced, write the chassis number
(Refer to GROUP 00

− Precautions Before

Service

− How to Perform Chassis Number

Writing ). After replacing the engine-ECU,
register the injector identification code and
learn fuel injection (Refer to GROUP 00

−

Precautions Before Service

− What The

Common Rail Engine Learns ).

NO :

Intermittent malfunction (Refer to GROUP
00

− How to Use Troubleshooting/

Inspection Service Points

− How to Cope

with Intermittent Malfunctions ).

Code No. P0219: Engine Overspeed Condition

OPERATION

• Refer to Code No. P0335: Crank Angle Sensor

System

P.13A-184

.

AKA00189

1

2

Connector: A-129

Harness side
connector

AB

A-129 (GR)

AKA00089

1

2

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C-105 (B)

C-105 (B)

<R.H. drive vehicles>

Harness side connector

<L.H. drive vehicles>

Connector: C-105

AB

AKA00089

1

2

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C-105 (B)

C-105 (B)

<R.H. drive vehicles>

Harness side connector

<L.H. drive vehicles>

Connector: C-105

AB

TROUBLESHOOTING

DIESEL FUEL

13A-178

FUNCTION

• The engine-ECU monitors the engine speeds

based on the signals from the crank angle sen-
sor.

• The engine-ECU checks whether the engine

speeds are too high.

TROUBLE JUDGMENT

Check Condition

• Ignition switch is in ON position

Judgment Criterion

• Engine speed is 5,500 r/min or more

PROBABLE CAUSE

• Failed engine-ECU

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III diagnosis code

Q: Is any other diagnosis code than P0219 output?

YES :

Inspection chart for diagnosis codes (Refer

to

P.13A-21

).

NO :

Replace the engine-ECU. When the engine-
ECU is replaced, write the chassis number
(Refer to GROUP 00

− Precautions Before

Service

− How to Perform Chassis Number

Writing ). After replacing the engine-ECU,
register the injector identification code and
learn fuel injection (Refer to GROUP 00

−

Precautions Before Service

− What The

Common Rail Engine Learns ). After
registering the injector identification code,
the vehicle equipped with the DPF carries
out the forcible DPF regeneration. (Refer to
GROUP 17

− Emission Control − Diesel

Particulate Filter (DPF) System

− Forcible

DPF Regeneration ).

Code No. P0234: Turbocharger Overboost Condition <Except Euro5>

FUNCTION

• The engine-ECU checks whether the boost pres-

sure is not higher than the specified value.

TROUBLE JUDGMENT

Check Condition

• Engine is running

Judgement Criterion

• The boost pressure exceeds the abnormality

determination value for 3 seconds.

PROBABLE CAUSES

• Failed the waste gate actuator

• Failed the engine-ECU

DIAGNOSIS

STEP 1. Check waste gate actuator itself.

• Check waste gate actuator itself (Refer to

GROUP 15

− On-vehicle Service − Waste Gate

Actuator Check ).

Q: Is the check result normal?

YES :

Go to Step 2 .

NO :

Replace the waste gate actuator.

STEP 2. M.U.T.-III diagnosis code

• Reconfirmation of diagnosis code.

Q: Is the diagnosis code set?

YES :

Replace the engine-ECU. When the engine-

ECU is replaced, write the chassis number
(Refer to GROUP 00

− Precautions Before

Service

− How to Perform Chassis Number

Writing ). After replacing the engine-ECU,
register the injector identification code and
learn fuel injection (Refer to GROUP 00

−

Precautions Before Service

− What The

Common Rail Engine Learns ). After
registering the injector identification code,
carry out the forcible DPF regeneration.
(Refer to GROUP 17

− Emission Control −

Diesel Particulate Filter (DPF) System

−

Forcible DPF Regeneration ).

NO :

Intermittent malfunction (Refer to GROUP
00

− How to Use Troubleshooting/

Inspection Service Points

− How to Cope

with Intermittent Malfunctions ).

TROUBLESHOOTING

DIESEL FUEL

13A-179

Code No. P0299: Turbocharger Under Boost Condition

FUNCTION

• The engine-ECU checks whether the boost pres-

sure is not lower than the specified value.

TROUBLE JUDGMENT

Check Condition

• Engine is running

Judgment Criterion

• The opening degree of accelerator pedal is 23%

for 3 seconds and the boost pressure is not lower
than the specified value.

PROBABLE CAUSES

• Intercooler air hose disconnected or damaged

• Vacuum hose of manifold absolute pressure sen-

sor disconnected or damaged

• Failed manifold absolute pressure sensor

• Failed engine-ECU

DIAGNOSIS

STEP 1. Check on intercooler air hose.

• Check whether the intercooler air hose is discon-

nected or damaged.

Q: Is the check result normal?

YES :

Go to Step 2 .

NO :

Repair.

STEP 2. Check on vacuum hose of manifold
absolute pressure sensor.

• Check whether the vacuum hose of manifold

absolute pressure sensor is disconnected or
damaged.

Q: Is the check result normal?

YES :

Go to Step 3 .

NO :

Repair.

STEP 3. Check turbocharger supercharging
pressure..

• Check turbocharger supercharging pressure

(Refer to GROUP 15

− On-vehicle − Turbo-

charger Supercharging Pressure Check ).

Q: Is the check result normal?

YES :

Go to Step 4 .

NO :

Repair.

STEP 4. M.U.T.-III diagnosis code

• Reconfirmation of diagnosis code.

Q: Is the check result normal?

YES :

Replace the engine-ECU. When the engine-

ECU is replaced, write the chassis number
(Refer to GROUP 00

− Precautions Before

Service

− How to Perform Chassis Number

Writing ). After replacing the engine-ECU,
register the injector identification code and
learn fuel injection (Refer to GROUP 00

−

Precautions Before Service

− What The

Common Rail Engine Learns ). After
registering the injector identification code,
the vehicle equipped with the DPF carries
out the forcible DPF regeneration. (Refer to
GROUP 17

− Emission Control − Diesel

Particulate Filter (DPF) System

− Forcible

DPF Regeneration ).

NO :

Intermittent malfunction (Refer to GROUP
00

− How to Use Troubleshooting/

Inspection Service Points

− How to Cope

with Intermittent Malfunctions ).

Code No. P0301: No. 1 Cylinder Injector Malfunction (No Injection)

FUNCTION

• The Engine-ECU, by monitoring the variation in

the engine revolution, detects the non-fuel injec-
tion state.

TROUBLE JUDGMENT

Check Conditions

• During the normal engine operation

• Engine coolant temperature is 80°C or higher.

• Crank angle sensor is normal.

Judgment Criterion

• The variation in the engine revolution is more

than the specified value.

PROBABLE CAUSES

• Failed No. 1 injector

• No. 1 fuel injection pipe clogged

• Failed Engine-ECU