Mitsubishi L200. Manual — part 235

EMISSION CONTROL

ENGINE AND EMISSION CONTROL

17-44

If the PM accumulates more than the standard, the
engine-ECU carries out the control that automatically
regenerates the DPF under certain conditions to
remove the PM. At the DPF regeneration, the DPF
temperature gets high and high temperature exhaust
gases are given off.

SYSTEM DIAGRAM

AKB00299

Engine-ECU

Rail pressure sensor

Accelerator pedal position
sensor

Vehicle speed sensor

AB

Air flow sensor

No. 1 intake air temperature
sensor

EGR gas temperature sensor

Crank angle sensor

Engine coolant temperature
sensor

Manifold absolute pressure
sensor

Injector

No. 1 exhaust gas temperature sensor

No. 2 exhaust gas temperature sensor
(catalyst temperature)

No. 3 exhaust gas temperature
sensor (DPF temperature)

Exhaust differential
pressure sensor

Catalytic
converter

Catalytic
converter

DPF

Variable geometry
control solenoid valve

Throttle valve control
servo (DC motor)

EMISSION CONTROL

ENGINE AND EMISSION CONTROL

17-45

DPF LAMP

AKB00242

DPF lamp

AB

When the engine oil level or the amount of accumu-
lated PM within the DPF exceeds the specified value,
the DPF lamp is lit or blinked. When the vehicle is
brought into the shop with the DPF lamp blinked,
service the vehicle in accordance with the following
procedures.

DPF
lamp

Engine
warning
lamp

State and service

Being
blinked

Being lit

Carry out the forcible DPF
regeneration using M.U.T.-III
because PM being
excessively accumulated
within DPF is assumed.
(Refer to

P.17-46

)

Being
blinked

Not
being lit

Replace engine oil because
engine oil level excessively
increasing is assumed. (Refer
to GROUP 12

− On-vehicle

service

− Engine Oil

Replacement )

After turning the ignition switch to "ON" position, the
DPF lamp is lit for the purpose of the operational
check for about 5 seconds.

COMPONENT LOCATION (DPF SYSTEM)

M1175006700138

AKB00300 AB

No. 1 exhaust gas
temperature sensor

AKB00301

No. 2 exhaust gas
temperature sensor
(catalyst temperature)

No. 2 exhaust gas
temperature sensor
(catalyst temperature)
connector

AB

AKB00302 AB

No. 3 exhaust gas
temperature sensor
(DPF temperature)

No. 3 exhaust gas
temperature sensor
(DPF temperature)
connector

AKB00303AB

Exhaust differential
pressure sensor

EMISSION CONTROL

ENGINE AND EMISSION CONTROL

17-46

FORCIBLE DPF REGENERATION

M1175006800221

WARNING

When the forcible DPF regeneration is car-
ried out, confirm that no people or no com-
bustible material is within its vicinity. If
people or combustible material is around the
muffler, serious injury or damage such as
heat injury or fires may occur because high
temperature exhaust gases are put out.

WARNING

Perform the forcible DPF regeneration in a
well-ventilated and flat place when the vehi-
cle is stopped (If perform the forcible DPF
regeneration indoors, surely carry out
enforced ventilation).

WARNING

If the engine warning lamp is lit, the DPF sys-
tem might be abnormal. Carry out the inspec-
tion chart for diagnosis code, and then
perform the forcible DPF regeneration (Refer
to , GROUP 13A

−

Troubleshooting

−

Inspec-

tion Chart For Diagnosis codes).

Set the vehicle to the pre-inspection condition.

CAUTION

Connection and disconnection of M.U.T.-III
should be always performed with the ignition
switch turned to the "LOCK" (OFF) position.

AC509179

AB

Diagnosis

connector

MB991827

MB991824

MB991910

<LH drive vehicles>

AC501413AC

Diagnosis

connector

MB991827

MB991824

MB991910

<RH drive vehicles>

1. Connect the M.U.T.-III to the diagnosis connector.
2. Start the engine and let it run at idle.
3. From "FUNCTION MENU" on M.U.T.-III, select

"SPECIAL FUNCTION".

4. From "SPECIAL FUNCTION", select "DPF

REGENERATION".

EMISSION CONTROL

ENGINE AND EMISSION CONTROL

17-47

CAUTION

If the forcible regeneration of the DPF is carried
out while the accumulated amount of the PM in
the DPF exceeds the limit, the forcible regenera-
tion might not be correctly completed. This could
be caused by the detection in the DPF system
malfunction. Carry out the check procedure for
the diagnosis code and solve the malfunction.
(Refer to , GROUP 13A

− Troubleshooting −

Inspection Chart For Diagnosis Codes)
5. Perform Item No. 33, DPF Regeneration.

NOTE: Carrying out the forcible DPF regeneration
increases the engine speed 1,500

−

2,000 r/min

(the temperature increases within the DPF and is
maintained at approximately 600

°

C).

NOTE: When performed for about 25 minutes, the
forcible DPF regeneration automatically stops.
Depressing the accelerator pedal during the
regeneration, however, can cancel the forcible
DPF regeneration.
NOTE: If the DPF regeneration is carried out
while the DPF lamp is illuminated or blinked due
to the accumulated PM, the DPF lamp is turned
off as soon as the forcible regeneration is cor-
rectly completed.

6. Turn the ignition switch to the "LOCK" (OFF)

position and then remove the M.U.T.-III.

No. 1 EXHAUST GAS TEMPERATURE
SENSOR CHECK

M1175006900206

AKB00304

1 2

AB

No. 1 exhaust gas
temperature sensor

Equipment side
connector

1. Disconnect the No. 1 exhaust gas temperature

sensor connector.

2. Measure resistance between terminals No. 1 and

No. 2.

Standard value: 120

− 560 kΩ (at 20°C)

3. Remove the No. 1 exhaust gas temperature

sensor.

AKB00243

Exhaust gas
temperature sensor

AB

4. Measure resistance while heating the sensor

using a hair drier.

Normal condition:

Temperature (

°C)

Resistance (k

Ω)

Higher

Smaller

5. If the value deviates from the standard value or

the resistance remains unchanged, replace the
No. 1 exhaust gas temperature sensor assembly.

6. Install the No. 1 exhaust gas temperature sensor

and tighten it to the specified torque.

Tightening torque: 30

± 5 N⋅m

No. 2 EXHAUST GAS TEMPERATURE
SENSOR (CATALYST TEMPERATURE)
CHECK

M1175007000198

AKB00305

1 2

No. 2 exhaust gas
temperature sensor
(catalyst temperature)

No. 2 exhaust gas
temperature sensor
(catalyst temperature)
connector

AB

Equipment side
connector

1. Disconnect the No. 2 exhaust gas temperature

sensor (catalyst temperature) connector.

2. Measure resistance between terminals No. 1 and

No. 2.