Mitsubishi L200. Manual - part 166

TROUBLESHOOTING

DIESEL FUEL

13A-460

STEP 24. Connector check: A-16X starter relay 
connector

Q: Is the check result normal?

YES : 

Go to Step 25.

NO : 

Repair or replace.

STEP 25. Check harness between A-16X 
(terminal No. 2) starter relay connector and B-14 
(terminal No. 9) inhibitor switch connector 

NOTE: Before checking harness, check starter relay 
connectors A-115 and B-10, and repair if necessary.

• Check power supply line for damage.

Q: Is the check result normal?

YES : 

Go to Step 26.

NO : 

Repair the damaged harness wire.

STEP 26. Check harness between A-16X 
(terminal No. 3) starter relay connector and A-110 
(terminal No. 1) starter connector

NOTE: Before checking harness, check starter relay 
connectors A-27, and repair if necessary.

• Check output line for damage.

Q: Is the check result normal?

YES : 

Go to Step 27.

NO : 

Repair the damaged harness wire.

STEP 27. Check harness between A-10 (terminal 
No. 1) starter connector and battery.

• Check power supply line for damage.

Q: Is the check result normal?

YES : 

Replace the starter.

NO : 

Repair the damaged harness wire.

AK501014

2

1

3
4

AC

A-16X

Connector: A-16X

Relay box's side connector

AK501014

2

1

3
4

AC

A-16X

Connector: A-16X

Relay box's side connector

AK700823

3

4

5

8

9

1

2

6

7

10

AB

Connector: B-14

B-14 (B)

Harness side
connector

AK501014

2

1

3
4

AC

A-16X

Connector: A-16X

Relay box's side connector

AK700920

1

Harness side connector

Connector: A-110

AB

A-110 (B)

1

AK700921

Harness side connector

Connector: A-10

AB

A-10

TROUBLESHOOTING

DIESEL FUEL

13A-461

Inspection Procedure 5: Starting Impossible (Starter operative but no initial combustion)

PROBABLE CAUSES

• Failed battery

• Improper fuel used

• Fuel contaminated with foreign matter

• Injector leaking or clogged

• Failed injector

• Fuel injection learning failure

• Fuel filter clogged

• Fuel line leaking or clogged

• Failed fuel pressure limiter valve

• Failed rail pressure sensor

• Failed supply pump (suction control valve)

• Failed glow system

• Timing belt broken

• Failed engine-ECU

• Air cleaner clogged

• Compression pressure low

DIAGNOSIS PROCEDURE

STEP 1. Check battery voltage.

• Measure battery voltage at cranking.

OK: 8 V or more

Q: Is the check result normal?

YES : 

Go to Step 2 .

NO : 

Check battery (Refer to GROUP 54A 

− 

Battery 

− On-vehicle Service − Battery test 

).

STEP 2. M.U.T.-III diagnosis code.

Q: Is the diagnosis code set?

YES : 

Inspection chart for diagnosis code (Refer 

to 

P.13A-21

).

NO : 

Go to Step 3 .

STEP 3. Check injector identification code.

• Check injector identification code (Refer to 

GROUP 00 

− Precautions Before Service − Injec-

tor Identification code Registration Procedure ).

Q: Is the check result normal?

YES : 

Go to Step 4 .

NO : 

Register the injector ID.

STEP 4. M.U.T.-III data list.

• Item 40: Starter switch

OK:

ON (Ignition switch: ST)
OFF (Ignition switch: ON)

Q: Is the check result normal?

YES : 

Go to Step 5 .

NO : 

Check for starting impossible to operate 
(Refer to Inspection Procedure 4 

P.13A-445

 

<M/T> or 

P.13A-453

 <A/T>).

STEP 5. Check timing belt for breakage.

Q: Is the check result normal?

YES : 

Go to Step 6 .

NO : 

Replace the timing belt.

STEP 6. Confirm the using fuel.

Q: Is the specified fuel being used?

YES : 

Go to Step 7 .

NO : 

Replace fuel.

STEP 7. Check glow system.

• Check glow system (Refer to Code No. P0381 

P.13A-200

 <Euro5> or Inspection Procedure 25 

P.13A-520

 <Except Euro5>).

Q: Is the check result normal?

YES : 

Go to Step 8 .

NO : 

Repair or replace the failed item.

STEP 8. Check fuel supply line.

• Check for fuel leakage and clogging

• Check fuel filter for clogging

Q: Is the check result normal?

YES : 

Go to Step 9 .

NO : 

Repair or replace the failed item.

STEP 9. Priming (air bleeding)

• Bleed air

Q: Does trouble symptom persist?

YES : 

Go to Step 10 .

NO : 

The procedure is complete.

TROUBLESHOOTING

DIESEL FUEL

13A-462

STEP 10. M.U.T.-III actuator test.

• Refer to Actuator Test Reference Table 

P.13A-

574

.

a. Item 19: Suction control valve

Q: Is the check result normal?

YES : 

Go to Step 11 .

NO : 

Replace the suction control valve. After 
replacing the suction control valve, learn the 
supply pump (Refer to GROUP 00 

− 

Precautions Before Service 

− What The 

Common Rail Engine Learns ).

STEP 11. Check suction control value itself.

• Check suction control value itself (Refer to 

P.13A-596

).

Q: Is the check result normal?

YES : 

Go to Step 12 .

NO : 

Replace the suction control valve. After 
replacing the suction control valve, learn the 
supply pump (Refer to GROUP 00 

− 

Precautions Before Service 

− What The 

Common Rail Engine Learns ).

STEP 12. M.U.T.-III data list.

• Refer to Data List Reference Table 

P.13A-542

.

a. Item 63: Rail pressure sensor
b. Item 64: Rail pressure target

Q: Are the check results normal?

YES : 

Go to Step 14 .

NO : 

Go to Step 13 .

STEP 13. Replace the rail pressure sensor.

• Replace the common-rail assembly.

Q: Does trouble symptom persist?

YES : 

Go to Step 18 .

NO : 

The procedure is complete.

STEP 14. Check the waveforms of crank angle 
sensor and camshaft position sensor.

• Check the waveforms during cranking.

Q: Are waveforms being output?

YES : 

Go to Step 15 .

NO : 

Proceed to the diagnostic code procedure 
for the sensor that does not output 
waveforms (Refer to Inspection Chart for 
Diagnosis Code 

P.13A-21

).

STEP 15. Check compression pressure.

• Check compression pressure (Refer to GROUP 

11A 

− On-vehicle Service − Compression Pres-

sure Check ).

Q: Is the check result normal?

YES : 

Go to Step 16 .

NO : 

Check and repair the engine itself.

STEP 16. Check injector itself.

• Check injector itself (Refer to 

P.13A-595

).

Q: Is the check result normal?

YES : 

Go to Step 17 .

NO : 

Replace the injector at the failed cylinder. 
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 17. M.U.T.-III data list.

• Refer to Data List Reference Table 

P.13A-542

.

a. Item 5: Barometric pressure sensor
b. Item 7: Engine coolant temperature sensor

c. Item 8: EGR gas temperature sensor 

<Euro5>

d. Item 8: Intake air temperature sensor No. 2 

<Except Euro5>

e. Item 21: Fuel temperature sensor

f. Item 43: Intake air temperature sensor No. 1

Q: Are the check results normal?

YES : 

Go to Step 18 .

NO : 

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

P.13A-21

).

STEP 18. Check the trouble symptoms.

Q: Does trouble symptom persist?

TROUBLESHOOTING

DIESEL FUEL

13A-463

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 Malfunction ).

Inspection Procedure 6: Improper Starting (Long time to start)

PROBABLE CAUSES

• Failed battery

• Improper fuel used

• Fuel contaminated with foreign matter

• Injector leaking or clogged

• Failed injector

• Fuel injection learning failure

• Fuel filter clogged

• Fuel line leaking or clogged

• Failed fuel pressure limiter valve

• Failed rail pressure sensor

• Failed supply pump (suction control valve)

• Failed supply pump correction learning

• Failed glow system

• Failed EGR system operation

• Failed engine-ECU

• Compression pressure low

DIAGNOSIS PROCEDURE

STEP 1. Check battery voltage.

• Measure battery voltage during cranking.

OK: 8 V or more

Q: Is the check result normal?

YES : 

Go to Step 2 .

NO : 

Check battery (Refer to GROUP 54A 

− 

Battery 

− On-vehicle Service − Battery Test 

).

STEP 2. M.U.T.-III diagnosis code.

Q: Is the diagnosis code set?

YES : 

Inspection chart for diagnosis code (Refer 

to 

P.13A-21

).

NO : 

Go to Step 3 .

STEP 3. M.U.T.-III data list.

• Refer to Data List Reference Table (Refer to 

P.13A-542

).

a. Item 5: Barometric pressure sensor
b. Item 7: Engine coolant temperature sensor

c. Item 8: EGR gas temperature sensor 

<Euro5>

d. Item 8: Intake air temperature sensor No. 2 

<Except Euro5>

e. Item 16: EGR valve position sensor

f. Item 17: EGR valve target position

g. Item 21: Fuel temperature sensor
h. Item 43: Intake air temperature sensor No. 1

Q: Are the check results normal?

YES : 

Go to Step 4 .

NO : 

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

P.13A-21

).