Mitsubishi L200. Manual — part 153

TROUBLESHOOTING

DIESEL FUEL

13A-408

STEP 4. Check harness between C-105 (terminal
No. 115) engine-ECU connector and A-45
(terminal No. 6) EGR valve assembly connector.

• Check output line for open/short circuit and dam-

age.

Q: Is the check result normal?

YES :

Go to Step 5 .

NO :

Repair the damaged harness wire.

STEP 5. Check harness between C-105 (terminal
No. 130) engine-ECU connector and A-45
(terminal No. 4) EGR valve connector.

• Check output line for open/short circuit and dam-

age.

Q: Is the check result normal?

YES :

Go to Step 6 .

NO :

Repair the damaged harness wire.

STEP 6. M.U.T.-III diagnosis code.

• After erasing the diagnosis code through M.U.T.-

III, start the engine and confirm whether the diag-
nosis code is output.

Q: Is the diagnosis code set?

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

AK501331

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5

6

AB

Harness side
connector

A-45 (GR)

Connector: A-45

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

AK501331

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3

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6

AB

Harness side
connector

A-45 (GR)

Connector: A-45

TROUBLESHOOTING

DIESEL FUEL

13A-409

YES :

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 ).

NO :

Intermittent malfunction (Refer to GROUP
00

− How to Use Troubleshooting/

Inspection Service Points

− How to Cope

with Intermittent Malfunctions ).

TROUBLESHOOTING

DIESEL FUEL

13A-410

Code No. P2454: Exhaust Differential Pressure Sensor Circuit Low Input <Euro5>

OPERATION

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

differential pressure sensor power terminal (ter-
minal No. 3) from the engine-ECU (terminal No.
94) and earthed to the engine-ECU (terminal No.
80) from exhaust differential pressure sensor (ter-
minal No. 2).

• The sensor signal is inputted to the engine-ECU

(terminal No. 56) from the exhaust differential
pressure sensor output terminal (terminal No. 1).

FUNCTION

• The exhaust differential pressure sensor outputs

the voltage to the engine-ECU in accordance with
the difference in the voltage between the DPF
upstream area and the DPF downstream area.

• The engine-ECU anticipates the amount of PM

accumulated in the DPF through this output volt-
age.

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 exhaust differential pressure sensor output

voltage is 0.49 V or less.

PROBABLE CAUSES

• Failed exhaust differential pressure sensor

• Open/short circuit or harness damage in exhaust

differential pressure sensor circuit or loose con-
nector contact

• Failed engine-ECU

AKB00280

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1 2 3

AB

80

GR-B

P-G

B-O

56

94

A-148

Exhaust differential
pressure sensor

2

1

3

Exhaust Differential Pressure Sensor Circuit

C-105

5 V

Earth

Output signal

Power source

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

TROUBLESHOOTING

DIESEL FUEL

13A-411

DIAGNOSTIC PROCEDURE

STEP 1. M.U.T.-III data list

• Refer to Data List Reference Table

P.13A-542

.

a. Item 120: exhaust differential 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 .

STEP 2. Connector check: A-148 exhaust
differential pressure 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-148
exhaust differential pressure sensor connector.

• Disconnect connector, and measure at harness

side.

• 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 9 .

NO :

Go to Step 4 .

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

• Measure engine-ECU terminal voltage.

• Ignition switch: ON

• Voltage between terminal No. 94 and earth.

OK: 4.9

− 5.1 V

Q: Is the check result normal?

YES :

Go to Step 8 .

NO :

Go to Step 5 .

AKB00281

3 2 1

AB

A-148 (B)

Harness side
connector

Connector: A-148

AKB00281

3 2 1

AB

A-148 (B)

Harness side
connector

Connector: A-148

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