Mitsubishi L200. Manual - part 73

TROUBLESHOOTING

DIESEL FUEL

13A-88

STEP 15. Perform voltage measurement at C-105 
engine-ECU connector.

• Measure engine-ECU terminal voltage.

• Ignition switch: ON

• Voltage between terminal No. 37 and earth.

OK: 0.7 

− 1.2 V

Q: Is the check result normal?

YES : 

Go to Step 17 . 

NO : 

Go to Step 16 . 

STEP 16. Connector check: C-105 engine-ECU 
connector

Q: Is the check result normal?

YES : 

Check and repair check harness between 

A-105 (terminal No. 2) manifold absolute 
pressure sensor connector and C-105 
(terminal No. 37) engine-ECU connector.

• Check output line for open circuit and 

damage.

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

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

AK900797

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3 2

AB

Harness side 
connector

A-105 (L)

Connector: A-105

TROUBLESHOOTING

DIESEL FUEL

13A-89

STEP 17. Connector check: C-105 engine-ECU 
connector

Q: Is the check result normal?

YES : 

Go to Step 7 .

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

TROUBLESHOOTING

DIESEL FUEL

13A-90

Code No. P0108: Manifold Absolute Pressure Sensor Circuit High Input

OPERATION

• A power voltage of 5 V is applied to the manifold 

absolute pressure sensor power terminal (termi-
nal No. 1) from the engine-ECU (terminal No. 72) 
and earthed to the engine-ECU (terminal No. 31) 
from the manifold absolute pressure sensor (ter-
minal No. 3).

• The sensor signal is inputted to the engine-ECU 

(terminal No. 37) from the manifold absolute 
pressure sensor output terminal (terminal No. 2).

FUNCTION

• The manifold absolute pressure sensor converts 

the manifold absolute pressure into a voltage sig-
nal and inputs the signal to the engine-ECU.

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

rects the fuel injection amount, etc.

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 manifold absolute pressure sensor output 

voltage should exceed 4.72 V for 0.5 seconds.

PROBABLE CAUSES

• Failed manifold absolute pressure sensor

• Open circuit in manifold absolute pressure 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 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 : 

Go to Step 2 .

AKA00093

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Engine-ECU

31

LG-B

G-L

GR

37

72

A-105

Manifold 
absolute 
pressure 
sensor 

3

2

1

Manifold Absolute Pressure Sensor Circuit 

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

C-105

5 V

AB

TROUBLESHOOTING

DIESEL FUEL

13A-91

STEP 2. Connector check: A-105 manifold 
absolute pressure sensor 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-
105 manifold absolute pressure sensor 
connector.

• Disconnect connector, and measure at harness 

side.

• Resistance between terminal No. 3 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.

AK900797

1

3 2

AB

Harness side 
connector

A-105 (L)

Connector: A-105

AK900797

1

3 2

AB

Harness side 
connector

A-105 (L)

Connector: A-105

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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