Mitsubishi L200. Manual - part 74

TROUBLESHOOTING

DIESEL FUEL

13A-92

STEP 5. Check harness between A-105 (terminal 
No. 3) manifold absolute pressure sensor 
connector and C-105 (terminal No. 31) engine-
ECU connector.

• Check earthing line for open 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 6: Manifold absolute pressure 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. M.U.T.-III data list

• Refer to Data List Reference Table 

P.13A-542

.

a. Item 6: Manifold absolute pressure 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 manifold absolute pressure 
sensor.

AK900797

1

3 2

AB

Harness side 
connector

A-105 (L)

Connector: A-105

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

TROUBLESHOOTING

DIESEL FUEL

13A-93

Code No. P0112: EGR Gas Temperature Sensor Circuit Low Input <Euro5>

OPERATION

• A power voltage of 5 V is applied to the EGR gas 

temperature sensor output terminal (terminal No. 
2) from the engine-ECU (terminal No. 36).

• The power voltage is earthed to the engine-ECU 

(terminal No. 30) from the EGR gas temperature 
sensor (terminal No. 1).

FUNCTION

• The EGR gas temperature sensor converts the 

EGR gas temperature into a voltage and inputs 
the voltage signal to the engine-ECU.

• The EGR gas temperature sensor is a kind of 

resistor, which has characteristics to reduce its 
resistance as the EGR gas temperature rises. 
Therefore, the sensor output voltage varies with 
the EGR gas temperature, and becomes lower as 
the EGR gas temperature rises.

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.

Judgment Criterion

• The EGR gas temperature sensor output voltage 

is 0.11 V or less (the EGR gas temperature is 
above 500

°C or equivalent).

PROBABLE CAUSES

• Failed EGR gas temperature sensor

• Short circuit or harness damage in EGR gas tem-

perature sensor circuit or loose connector contact

• Failed engine-ECU

AKB00262

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1 2

AB

30

36

EGR gas temperature
sensor

Engine-ECU 

1

2

EGR Gas Temperature Sensor Circuit

B-P

L-R

A-157

C-105

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

TROUBLESHOOTING

DIESEL FUEL

13A-94

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III data list

• Refer to Data List Reference Table 

P.13A-542

a. Item 8: EGR gas temperature 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-157 EGR gas 
temperature sensor connector

Q: Is the check result normal?

YES : 

Go to Step 3 .

NO : 

Repair or replace the connector.

STEP 3. Check EGR gas temperature sensor 
itself.

• Check EGR gas temperature sensor itself (Refer 

to GROUP 17 

− Emission Control − Exhaust Gas 

Recirculation (EGR) System 

− EGR Gas Temper-

ature Sensor Check ).

Q: Is the check result normal?

YES : 

Go to Step 4 .

NO : 

Replace the EGR gas temperature sensor.

STEP 4. Perform voltage measurement at A-157 
EGR gas temperature sensor connector.

• Disconnect connector, and measure at harness 

side.

• Ignition switch: ON

• Voltage between terminal No. 2 and earth.

OK: 4.5 

− 4.9 V

Q: Is the check result normal?

YES : 

Go to Step 8 .

NO : 

Go to Step 5 .

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.

AKB00263

1

2

AB

A-157 (B)

Harness side
connector

Connector: A-157

AKB00263

1

2

AB

A-157 (B)

Harness side
connector

Connector: A-157

AKA00089

1

2

3

4

5

6

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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

TROUBLESHOOTING

DIESEL FUEL

13A-95

STEP 6. Check harness between A-157 (terminal 
No. 2) EGR gas temperature sensor connector 
and C-105 (terminal No. 36) engine-ECU 
connector.

• Check output line for short 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

• Refer to Data List Reference Table 

P.13A-542

a. Item 8: EGR gas temperature 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, 
carry 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-
157 EGR gas temperature sensor connector.

• Disconnect connector, and measure at harness 

side.

• Resistance between terminal No. 1 and earth.

OK: Continuity (2 

Ω or less)

Q: Is the check result normal?

YES : 

Go to Step 11 .

NO : 

Go to Step 9 .

AKB00263

1

2

AB

A-157 (B)

Harness side
connector

Connector: A-157

AKA00089

1

2

3

4

5

6

7

8

9

10

11

12

13

14

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55

56

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60

61

62

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64

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70

71

72

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48

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76

77

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79

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81

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83

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85

86

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88

89

90

91

92

93

94

95

96

C-105 (B)

C-105 (B)

<R.H. drive vehicles>

Harness side connector

<L.H. drive vehicles>

Connector: C-105

AB

AKB00263

1

2

AB

A-157 (B)

Harness side
connector

Connector: A-157