Mitsubishi L200. Manual - part 83

TROUBLESHOOTING

DIESEL FUEL

13A-128

STEP 13. Check harness between A-132 (terminal 
No. 1) electronic-controlled throttle valve 
connector and C-105 (terminal No. 40) engine-
ECU connector.

• Check output line for short circuit.

Q: Is the check result normal?

YES : 

Go to Step 14 .

NO : 

Repair the damaged harness wire.

STEP 14. 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 damage.

Q: Is the check result normal?

YES : 

Replace the electronic-controlled throttle 

valve.

NO : 

Repair the damaged harness wire.

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

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-129

STEP 15. Check harness between A-132 (terminal 
No. 1) electronic-controlled throttle valve 
connector and C-105 (terminal No. 40) engine-
ECU connector.

• Check output line for open circuit and damage.

Q: Is the check result normal?

YES : 

Go to Step 6 .

NO : 

Repair the damaged harness wire.

AK604705

1

6 5 4 3 2

AB

A-132 (B)

Connector: A-132

Harness side 
connector

AKA00089

1

2

3

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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-130

Code No. P0123: Throttle Position Sensor Circuit High 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

6

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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

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93

2

Electronic-controlled 
throttle valve

R

W

Engine-ECU

40

34

1

4

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

TROUBLESHOOTING

DIESEL FUEL

13A-131

Judgment Criterion

• The throttle position sensor output voltage is 4.85 

V or more for 0.5 second.

PROBABLE CAUSES

• Failed throttle position sensor

• Open circuit or harness damage in throttle posi-

tion 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 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 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

1

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