Mitsubishi L200. Manual - part 97

TROUBLESHOOTING

DIESEL FUEL

13A-184

OPERATION

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

angle sensor power terminal (terminal No. 3) 
from the engine-ECU (terminal No. 68) and 
earthed to engine-ECU (terminal No. 91) from the 
crank angle sensor (terminal No. 1).

• The sensor signal is inputted to the engine-ECU 

(terminal No. 67) from the crank angle sensor 
output terminal (terminal No. 2).

FUNCTION

• The crank angle sensor detects the crank angle 

(position) and inputs a pulse signal to the engine-
ECU.

• In response to the signal, the engine ECU detects 

the engine speed, controls the fuel injection tim-
ing and fuel injection quantity, etc.

TROUBLE JUDGMENT

Check Condition

• Battery positive voltage is 6 − 16 V.

Judgment Criterion

• The number of output pulses from the crank 

angle sensor per engine rotation is one or less.

PROBABLE CAUSES

• Failed crank angle sensor

• Open/short circuit in crank angle 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

a. Item 2: Engine revolution

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-07 crank angle 
sensor connector

Q: Is the check result normal?

YES : 

Go to Step 3 .

NO : 

Repair or replace the connector.

STEP 3. Perform voltage measurement at A-07 
crank angle sensor connector.

• Use special tool test harness (MB991709) to con-

nect connector, and measure at pick-up harness.

• Ignition switch: ON

• Voltage between terminal No. 2 and earth.

OK: 4.9 

− 5.1 V

Q: Is the check result normal?

YES : 

Go to Step 9 .

NO : 

Go to Step 4 .

AK501329

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AB

Harness side 
connector

A-07 (B)

Connector: A-07

AK501329

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2

3

AB

Harness side 
connector

A-07 (B)

Connector: A-07

TROUBLESHOOTING

DIESEL FUEL

13A-185

STEP 4. Perform voltage measurement at C-105 
engine-ECU connector.

• Measure engine-ECU terminal voltage.

• Disconnect A-07 crank angle sensor connector.

• Ignition switch: ON

• Voltage between terminal No. 67 and earth.

OK: 4.9 

− 5.1 V

Q: Is the check result normal?

YES : 

Go to Step 5 .

NO : 

Go to Step 6 .

STEP 5. Connector check: C-105 engine-ECU 
connector

Q: Is the check result normal?

YES : 

Check intermediate connector A-133, and 

repair if necessary. If intermediate 
connector is normal, check and repair 
harness between A-07 (terminal No. 2) 
crank angle sensor connector and C-105 
(terminal No. 67) engine-ECU connector.

• Check output line for open circuit and 

damage.

NO : 

Repair or replace the connector.

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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

AK501329

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AB

Harness side 
connector

A-07 (B)

Connector: A-07

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

AK501329

1

2

3

AB

Harness side 
connector

A-07 (B)

Connector: A-07

TROUBLESHOOTING

DIESEL FUEL

13A-186

STEP 6. Connector check: C-105 engine-ECU 
connector

Q: Is the check result normal?

YES : 

Go to Step 7 .

NO : 

Repair or replace the connector.

STEP 7. Check harness between A-07 (terminal 
No. 2) crank angle sensor connector and C-105 
(terminal No. 67) engine-ECU connector.

NOTE: Before checking harness, check intermediate 
connector A-133, and repair if necessary.

• Check output line for short circuit.

Q: Is the check result normal?

YES : 

Go to Step 8 .

NO : 

Repair the damaged harness wire.

STEP 8. M.U.T.-III data list

• Refer to Data List Reference Table

a. Item 2: Engine revolution

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

AK501329

1

2

3

AB

Harness side 
connector

A-07 (B)

Connector: A-07

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-187

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 9. Perform voltage measurement at A-07 
crank angle sensor connector.

• Use special tool test harness (MB991709) to con-

nect connector, and measure at pick-up harness.

• Ignition switch: ON

• Voltage between terminal No. 3 and earth.

OK: 4.9 

− 5.1 V

Q: Is the check result normal?

YES : 

Go to Step 11 .

NO : 

Go to Step 10 .

STEP 10. Connector check: C-105 engine-ECU 
connector

Q: Is the check result normal?

YES : 

Check intermediate connector A-133, and 

repair if necessary. If intermediate 
connector is normal, check and repair 
harness between A-07 (terminal No. 3) 
crank angle sensor connector and C-105 
(terminal No. 68) engine-ECU connector.

• Check power supply line for open/

short circuit and damage.

NO : 

Repair or replace the connector.

AK501329

1

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3

AB

Harness side 
connector

A-07 (B)

Connector: A-07

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

AK501329

1

2

3

AB

Harness side 
connector

A-07 (B)

Connector: A-07