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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2
3
AB
Harness side
connector
A-07 (B)
Connector: A-07
AK501329
1
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.
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
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
2
3
AB
Harness side
connector
A-07 (B)
Connector: A-07
AKA00089
1
2
3
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5
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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
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