Mitsubishi L200. Manual - part 82

TROUBLESHOOTING

DIESEL FUEL

13A-124

Judgment Criterion

• The throttle position sensor output voltage is 0.15 

V or less for 0.5 second.

PROBABLE CAUSES

• Failed throttle position sensor

• Open/short circuit or harness damage in throttle 

position sensor circuit or loose connector contact

• Failed engine-ECU

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III data list

• Refer to Data List Reference Table 

P.13A-542

.

a. Item 45: Throttle position sensor

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. Connector check: A-132 electronic-
controlled throttle valve connector

Q: Is the check result normal?

YES : 

Go to Step 3 .

NO : 

Repair or replace the connector.

STEP 3. Perform voltage measurement at A-132 
electronic-controlled throttle valve connector.

• Disconnect connector, and measure at harness 

side.

• Ignition switch: ON 

• Voltage between terminal No. 2 and earth.

OK: 4.9 

− 5.1 V

Q: Is the check result normal?

YES : 

Go to Step 7 .

NO : 

Go to Step 4 .

STEP 4. Connector check: C-105 engine-ECU 
connector

Q: Is the check result normal?

YES : 

Go to Step 5 .

NO : 

Repair or replace the connector.

AK604705

1

6 5 4 3 2

AB

A-132 (B)

Connector: A-132

Harness side 
connector

AK604705

1

6 5 4 3 2

AB

A-132 (B)

Connector: A-132

Harness side 
connector

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-125

STEP 5. Check harness between A-132 (terminal 
No. 2) electronic-controlled throttle valve 
connector and C-105 (terminal No. 93) engine-
ECU connector.

• Check power supply line for open/short circuit.

Q: Is the check result normal?

YES : 

Go to Step 6 .

NO : 

Repair the damaged harness wire.

STEP 6. M.U.T.-III data list

• Refer to Data List Reference Table 

P.13A-542

.

a. Item 45: Throttle position sensor

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. 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 ).

STEP 7. Perform resistance measurement at A-
132 electronic-controlled throttle valve 
connector.

• Disconnect connector, and measure at harness 

side.

• Resistance between terminal No. 4 and earth.

OK: Continuity (2 

Ω or less)

Q: Is the check result normal?

YES : 

Go to Step 10 .

NO : 

Go to Step 8 .

AK604705

1

6 5 4 3 2

AB

A-132 (B)

Connector: A-132

Harness side 
connector

AKA00089

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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

AK604705

1

6 5 4 3 2

AB

A-132 (B)

Connector: A-132

Harness side 
connector

TROUBLESHOOTING

DIESEL FUEL

13A-126

STEP 8. Connector check: C-105 engine-ECU 
connector

Q: Is the check result normal?

YES : 

Go to Step 9 .

NO : 

Repair or replace the connector.

STEP 9. Check harness between A-132 (terminal 
No. 4) electronic-controlled throttle valve 
connector and C-105 (terminal No. 34) engine-
ECU connector.

• Check earthing line for damage.

Q: Is the check result normal?

YES : 

Go to Step 6 .

NO : 

Repair the damaged harness wire.

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

AK604705

1

6 5 4 3 2

AB

A-132 (B)

Connector: A-132

Harness side 
connector

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-127

STEP 10. Connector check: C-105 engine-ECU 
connector

Q: Is the check result normal?

YES : 

Go to Step 11 .

NO : 

Repair or replace the connector.

STEP 11. Perform voltage measurement at A-132 
electronic-controlled throttle valve connector.

• Use special tool test harness (MB991658) to con-

nect connector, and measure at pick-up harness.

• Ignition switch: ON

• Voltage between terminal No. 1 and earth.

OK: 3.7 V or higher.

Q: Is the check result normal?

YES : 

Go to Step 15 .

NO : 

Go to Step 12 .

STEP 12. Connector check: C-105 engine-ECU 
connector

Q: Is the check result normal?

YES : 

Go to Step 13 .

NO : 

Repair or replace the connector.

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

AK604705

1

6 5 4 3 2

AB

A-132 (B)

Connector: A-132

Harness side 
connector

AKA00089

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2

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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