Mitsubishi L200. Manual - part 81

TROUBLESHOOTING

DIESEL FUEL

13A-120

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. Check harness between A-107 (terminal 
No. 1) engine coolant temperature sensor 
connector and C-105 (terminal No. 63) engine-
ECU connector.

• Check output line for open circuit.

Q: Is the check result normal?

YES : 

Go to Step 7 .

NO : 

Repair the damaged harness wire.

STEP 7. M.U.T.-III data list

• Item 7: Engine coolant temperature sensor

OK:

Engine cold state: At ambient temperature 

(atmospheric temperature) or equivalent.

Engine hot state: At 80 

− 120 °C

Q: Is the check result normal? 

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

AK501323

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2

AB

A-107 (B)

Harness side 
connector

Connector: A-107

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-121

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 8. Perform resistance measurement at A-
107 engine coolant temperature sensor 
connector.

• Disconnect connector, and measure at harness 

side.

• Resistance between terminal No. 2 and earth.

OK: Continuity (2 

Ω or less)

Q: Is the check result normal?

YES : 

Go to Step 7 .

NO : 

Go to Step 9 .

STEP 9. Connector check: C-105 engine-ECU 
connector

Q: Is the check result normal? 

YES : 

Go to Step 10 .

NO : 

Repair or replace the connector.

AK501323

1

2

AB

A-107 (B)

Harness side 
connector

Connector: A-107

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-122

STEP 10. Check harness between A-107 (terminal 
No. 2) engine coolant temperature sensor 
connector and C-105 (terminal No. 87) engine-
ECU connector.

• Check earthing line for open circuit.

Q: Is the check result normal?

YES : 

Go to Step 7 .

NO : 

Repair the damaged harness wire.

AK501323

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2

AB

A-107 (B)

Harness side 
connector

Connector: A-107

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-123

Code No. P0122: Throttle Position Sensor Circuit Low Input

OPERATION

• A power voltage of 5 V is applied to the elec-

tronic-controlled throttle valve (terminal No. 2) 
from the engine-ECU (terminal No. 93).

• The power voltage is earthed to the engine-ECU 

(terminal No. 34) from the electronic-controlled 
throttle valve (terminal No. 4).

• The sensor signal is inputted to the engine-ECU 

(terminal No. 40) from the electronic-controlled 
throttle valve output terminal (terminal No. 1).

FUNCTION

• The throttle position sensor converts the throttle 

valve position into voltage and inputs it into the 
engine-ECU.

• The engine-ECU control the throttle valve posi-

tion.

TROUBLE JUDGMENT

Check Conditions

• Battery positive voltage is 8 − 16 V

• 2 seconds later after the ignition switch has been 

in "ON" position or the engine has started up

AKA00096

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93

2

Electronic-controlled 
throttle valve

R

W

Engine-ECU

40

34

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Throttle Position Sensor Circuit

C-105

A-132

(MU805200)

Wire colour code
B: Black  LG: Light green  G: Green  L: Blue  W: White  Y: Yellow  SB: Sky blue  BR: Brown  O: Orange  GR: Gray
R: Red  P: Pink  V: Violet  PU: Purple  SI: Silver

Hall IC

5 V

B

B

AB