Mitsubishi L200. Manual - part 149

TROUBLESHOOTING

DIESEL FUEL

13A-392

Judgment Criterion

• When the peak current is not detected in injector 

circuits No. 2 and No. 3

PROBABLE CAUSES

• Failed No. 2 injector

• Failed No. 3 injector

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

and No. 3 injector circuit or loose connector con-
tact

• Failed engine-ECU

DIAGNOSIS PROCEDURE

WARNING

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 volt-
age.

STEP 1. Connector check: A-41 No. 2 injector 
connector and A-130 No. 3 injector connector

Q: Are the check results normal?

YES : 

Go to Step 2 .

NO : 

Repair or replace the connector.

STEP 2. Check Injector itself

• Check No. 2 injector and No. 3 injector itself 

(Refer to 

P.13A-595

).

Q: Is the check result normal?

YES : 

Go to Step 3 .

NO : 

Replace the 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. Connector check: C-105 engine-ECU 
connector

Q: Is the check result normal?

YES : 

Go to Step 4 .

NO : 

Repair or replace the connector.

AKA00191

1

2

Connectors: A-41, A-130

A-41 (GR)

A-130 (GR)

Harness side 
connector

AB

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-393

STEP 4. Check harness between C-105 (terminal 
No. 73) engine-ECU connector and A-41 (terminal 
No. 2) No. 2 injector connector.

• Check power supply line for open circuit and 

damage.

Q: Is the check result normal?

YES : 

Go to Step 5 .

NO : 

Repair the damaged harness wire.

STEP 5. Check harness between C-105 (terminal 
No. 75) engine-ECU connector and A-41 (terminal 
No. 1) No. 2 injector connector.

• Check earthing line for open/short circuit and 

damage.

Q: Is the check result normal?

YES : 

Go to Step 6 .

NO : 

Repair the damaged harness wire.

AKA00089

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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

AKA00187

1

2

Connector: A-41

A-41 (GR)

Harness side 
connector

AB

AKA00089

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2

3

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96

C-105 (B)

C-105 (B)

<R.H. drive vehicles>

Harness side connector

<L.H. drive vehicles>

Connector: C-105

AB

AKA00187

1

2

Connector: A-41

A-41 (GR)

Harness side 
connector

AB

TROUBLESHOOTING

DIESEL FUEL

13A-394

STEP 6. Check harness between C-105 (terminal 
No. 49) engine-ECU connector and A-130 
(terminal No. 2) No. 3 injector connector.

• Check power supply line for open/short circuit 

and damage.

Q: Is the check result normal?

YES : 

Go to Step 7 .

NO : 

Repair the damaged harness wire.

STEP 7. Check harness between C-105 (terminal 
No. 50) engine-ECU connector and A-130 
(terminal No. 1) No. 3 injector connector.

• Check earthing line for open/short circuit and 

damage.

Q: Is the check result normal?

YES : 

Go to Step 8 .

NO : 

Repair the damaged harness wire.

STEP 8. M.U.T.-III diagnosis code.

• After erasing the diagnosis code through M.U.T.-

III, start the engine and confirm whether the diag-
nosis code is output.

Q: Is the diagnosis code set?

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

AKA00188

1

2

Connector: A-130

A-130 (GR)

Harness side 
connector

AB

AKA00089

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2

3

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96

C-105 (B)

C-105 (B)

<R.H. drive vehicles>

Harness side connector

<L.H. drive vehicles>

Connector: C-105

AB

AKA00188

1

2

Connector: A-130

A-130 (GR)

Harness side 
connector

AB

TROUBLESHOOTING

DIESEL FUEL

13A-395

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 ).

Code No. P2149: Injector Common 2 (cylinder No. 2 and No. 3) Circuit Open <Except Euro5>

OPERATION
Driving power is supplied from the engine-ECU (ter-
minal No. 25) to the No. 2 injector (terminal No. 2) 
and No. 3 injector (terminal No. 2).

FUNCTION

• The engine-ECU monitors peak current from the 

No. 2 and No. 3 injector drive circuits.

TROUBLE JUDGMENT

Check Conditions

• Ignition switch is in "ON" position.

• Except during the engine cranking period

• Battery positive voltage is 8 V or more.

• When an engine-ECU internal capacitor is 

allowed to be charged

Judgment Criterion

• When the peak current is not detected in injector 

circuits No. 2 and No. 3

PROBABLE CAUSES

• Failed No. 2 injector

• Failed No. 3 injector

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

and No. 3 injector circuit or loose connector con-
tact

• Failed engine-ECU

DIAGNOSIS PROCEDURE

WARNING

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 volt-
age.

STEP 1. Connector check: A-41 No. 2 injector 
connector and A-130 No. 3 injector connector

Q: Are the check results normal?

YES : 

Go to Step 2 .

NO : 

Repair or replace the connector.

STEP 2. Check Injector itself

• Check No. 2 injector and No. 3 injector itself 

(Refer to 

P.13A-595

).

Q: Is the check result normal?

AKA00191

1

2

Connectors: A-41, A-130

A-41 (GR)

A-130 (GR)

Harness side 
connector

AB