Mitsubishi L200. Manual - part 75

 

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Mitsubishi L200. Manual - part 75

 

 

TROUBLESHOOTING

DIESEL FUEL

13A-96

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.

STEP 10. Check harness between A-157 (terminal 
No. 1) EGR gas temperature sensor connector 
and C-105 (terminal No. 30) engine-ECU 
connector.

• Check earthing line for damage.

Q: Is the check result normal?

YES : 

Go to Step 7 .

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

AKB00263

1

2

AB

A-157 (B)

Harness side
connector

Connector: A-157

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-97

STEP 11. Connector check: C-105 engine-ECU 
connector

Q: Is the check result normal?

YES : 

Go to Step 12 .

NO : 

Repair or replace the connector.

STEP 12. 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 damage.

Q: Is the check result normal? 

YES : 

Go to Step 7 .

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

AKB00263

1

2

AB

A-157 (B)

Harness side
connector

Connector: A-157

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-98

Code No. P0112: Intake Air Temperature Sensor No. 1 Circuit Low Input <Except Euro5>

OPERATION

• A power voltage of 5 V is applied to the intake air 

temperature sensor No. 1 output terminal (termi-
nal No. 2) from the engine-ECU (terminal No. 62).

• The power voltage is earthed to the engine-ECU 

(terminal No. 86) from the intake air temperature 
sensor No. 1 (terminal No. 1).

FUNCTION

• The intake air temperature sensor No. 1 converts 

the intake air temperature into a voltage and 
inputs the voltage signal to the engine-ECU.

• In response to the signal, the engine-ECU cor-

rects the fuel injection amount, etc.

• The intake air temperature sensor No. 1 is a kind 

of resistor, which has characteristics to reduce its 
resistance as the intake air temperature rises. 
Therefore, the sensor output voltage varies with 
the intake air temperature, and becomes lower as 
the intake air 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 intake air temperature sensor No. 1 output 

voltage is 0.09 V or less for 0.5 second.

PROBABLE CAUSES

• Failed intake air temperature sensor No. 1

• Short circuit or harness damage in intake air tem-

perature sensor No.1 circuit or loose connector 
contact

• Failed engine-ECU

AKA00356

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10 1112 13 14 15 16 17 18 19 20 21 22 23 24

25 26

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49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72

43 44 45 46 47 48

73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96

5

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2

1

86

62

Intake air temperature 
sensor No. 1 (integrated in
air flow sensor)

Engine-ECU 

1

2

Intake Air Temperature Sensor No. 1 Circuit

B-L

Y-L

A-135

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: Gray
R: Red  P: Pink  V: Violet  PU: Purple  SI: Silver

5 V

AB

TROUBLESHOOTING

DIESEL FUEL

13A-99

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III data list

• Item 43: Intake air temperature sensor No. 1

OK: At ambient temperature (atmospheric 
temperature) or equivalent.

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-135 air flow sensor 
connector

Q: Is the check result normal?

YES : 

Go to Step 3 .

NO : 

Repair or replace the connector.

STEP 3. Check intake air temperature sensor No. 
1 itself.

• Check intake air temperature sensor No. 1 itself 

(Refer to 

P.13A-595

).

Q: Is the check result normal?

YES : 

Go to Step 4 .

NO : 

Replace the air flow sensor.

STEP 4. Perform Voltage measurement at A-135 
air flow 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.

AKA00399

AB

Harness side 
connector

A-135 (B)

Connector: A-135

AKA00399

AB

Harness side 
connector

A-135 (B)

Connector: A-135

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

 

 

 

 

 

 

 

Content   ..  73  74  75  76   ..