Mitsubishi L200. Manual - part 55

TROUBLESHOOTING

DIESEL FUEL

13A-16

NOTE:

•

After the engine-ECU has detected a malfunction, the engine warning lamp illuminates when the engine is
next turned on and the same malfunction is re-detected. However, for items marked with a "*" in the diag-
nosis code number column, the engine warning lamp illuminates only on the first detection of the malfunc-
tion.

•

When the fuel runs out, the engine warning lamp would illuminate possibly. Supplying the fuel turns off the
engine warning lamp, but the diagnosis code No. P1272 and P1273 are stored.

METHOD OF READING AND ERASING
DIAGNOSIS CODES

Refer to , GROUP 00

− How to Use Troubleshooting/

Inspection Service Points

− How to Cope with Inter-

mittent Malfunctions.

INSPECTION USING M.U.T.-III DATA LIST
AND ACTUATOR TESTING

1. Carry out inspection by means of the data list and

the actuator test function, if there is an
abnormality, check and repair the chassis harness
and components.

2. After repairing, re-check using the M.U.T.-III and

check that the abnormal input and output have
returned to normal as a result of the repairs.

3. Erase the diagnosis code memory.
4. Remove the M.U.T.-III, and then start the engine

again and carry out a road test to confirm that the
problem has disappeared.

P1498*

Excessive PM accumulated in DPF <Euro5>

P1499*

Abnormally high DPF temperature <Euro5>

P1608*

Battery current sensor system <Euro5>

P1625*

Injection quantity compensation valve error

P1626*

Injection quantity compensation valve not coding

P2118

Throttle valve control (DC motor) current malfunction

P2122*

Accelerator pedal position sensor (main) circuit low input

P2123*

Accelerator pedal position sensor (main) circuit high input

P2127*

Accelerator pedal position sensor (sub) circuit low input

P2128*

Accelerator pedal position sensor (sub) circuit high input

P2138*

Accelerator pedal position sensor (main and sub) range/performance problem

P2146*

Injector common 1 (cylinder No. 1 and No. 4) circuit open

P2147*

Injector common circuit earth short

P2148*

Injector common circuit battery short

P2149*

Injector common 2 (cylinder No. 2 and No. 3) circuit open

P2150*

Injector common 2 circuit earth short <Euro5>

P2151*

Injector common 2 circuit battery short <Euro5>

P2228

Barometric pressure sensor circuit low input

P2229

Barometric pressure sensor circuit high input

P2413

EGR system performance

P2454*

Exhaust differential pressure sensor circuit low input <Euro5>

P2455*

Exhaust differential pressure sensor circuit high input <Euro5>

Code No.

Diagnosis item

TROUBLESHOOTING

DIESEL FUEL

13A-17

PROVISIONAL DIAGNOSIS CODE CON-
FIRMED

If detecting the malfunction during the first drive
cycle, the engine-ECU temporarily stores the diagno-
sis code as the provisional diagnosis code. If detect-
ing the same malfunction during the next drive cycle,
the engine-ECU determines that the malfunction
exists. The engine-ECU outputs the diagnosis code.
On the M.U.T.-III it is possible to display the stored
provisional diagnosis code which the engine-ECU
had detected during the first drive cycle. This makes
it possible to confirm in one drive cycle whether the
malfunction could happen again after the repair.
CONFIRMATION METHOD
1. After the ignition switch is in "LOCK" (OFF)

position, connect the M.U.T.-III to the diagnosis
connector.

2. Turn the ignition switch to the "ON" position.
3. Select "MPI/GDI/DIESEL" from System select

Screen of the M.U.T.-III.

4. Select "Special Function" from MPI/GDI/DIESEL

Screen.

5. Select "Provisional DTCs" from Special Function

Screen.

FREEZE FRAME DATA

When the engine-ECU detects a malfunction and
stores a diagnosis code, it also stores a current sta-
tus of the engine. This function is called "Freeze
frame data". By analyzing this "Freeze frame" data
with the M.U.T.-III, an effective troubleshooting can
be performed.
The display items of freeze frame data are shown
below.

DISPLAY ITEM LIST

NOTE:

1: Accumulated time of current malfunction from time point when malfunction is detected.

NOTE:

2: The items of Freeze Frame Data can be seen by selecting "Freeze Frame Data (OBD)" on "Self-

diagnosis" screen of M.U.T.-III. When system malfunctions are detected, the first detected malfunction data
only is stored.

Item No.

Data

Unit

Ignition cycle

−

Accumulated minute

min

500

Air flow sensor

g/s

501

Throttle position sensor (main)

507

Target exhaust gas recirculation valve

508

Barometric pressure sensor

kPa

509

Relative throttle position sensor

511

Accelerator pedal position sensor (main)

512

Accelerator pedal position sensor (sub)

516

Engine coolant temperature sensor

°C

525

Manifold absolute pressure sensor

kPa

526

Crank angle sensor

r/min

527

Vehicle speed

km/h

529

Intake air temperature sensor

°C

530

Time since engine running

sec

537

Power supply voltage

541

Throttle valve control servo

560

Rail pressure sensor

kPa

573

Exhaust gas recirculation error

TROUBLESHOOTING

DIESEL FUEL

13A-18

NOTE:

3: Time between engine start and malfunction detection.

FAIL-SAFE FUNCTION REFERENCE TABLE

When the diagnostic function detects a sensor or actuator fault or an abnormality in the control condition, the
vehicle is controlled by means of the pre-set control logic to maintain safe conditions for driving.

Malfunctioning item

Control contents during malfunction

Accelerator pedal position
sensor

• The accelerator pedal opening is controlled as 0%.

• Idle rotations are 1,300 r/min (both main and sub are faulty or have a

characteristic error).

Accelerator pedal position
sensor (main)

The amount of depression of the accelerator pedal is detected with using the
accelerator pedal position sensor (sub) signal, which is calculated by taking
half of the normal value.

Accelerator pedal position
sensor (sub)

The amount of depression of the accelerator pedal is detected with using the
accelerator pedal position sensor (main) signal, which is calculated by taking
half of the normal value.

Throttle position sensor

Power to the throttle valve control servo is interrupted.

Crank angle sensor

The engine is stopped (fuel injection and pump pressure feed are stopped).

Camshaft position sensor

• Rail pressure is controlled in the range from 50 to 100 MPa.

• Fuel injection is restricted (output restriction).

• The open angle of the accelerator pedal is controlled.

• The engine is stopped when a characteristic error of the crank angle

sensor occurs (fuel injection and pump pressure feed are stopped).

Engine coolant temperature
sensor

• Engine coolant temperature is controlled as 80 °C (−25 °C at startup).

• EGR control is stopped (fully closed).

Rail pressure sensor

• Rail pressure is controlled in the range from 50 to 100 MPa.

• Fuel injection is restricted (output restriction).

• The open angle of the accelerator pedal is controlled.

• The throttle valve is shut (opening fixed)

• EGR control is stopped (fully closed).

Fuel temperature sensor

Fuel temperature is controlled as 45

°C (−25 °C at startup).

Air flow sensor

• EGR control is stopped (fully closed).

• Control is performed using the previous value.

Manifold absolute pressure
sensor

• Manifold absolute pressure is controlled as 100 kPa.

• EGR control is stopped (fully closed).

Barometric pressure sensor

• Barometric pressure is controlled as 100 kPa.

• EGR control is stopped (fully closed).

Intake air temperature
sensor No. 1

• Intake air temperature is controlled as 50 °C.

• EGR control is stopped (fully closed).

Intake air temperature
sensor No. 2 <Except
Euro5>

• Intake air temperature is controlled as 50 °C.

• EGR control is stopped (fully closed).

EGR valve position sensor

EGR control is stopped (fully closed).

No. 1 exhaust gas
temperature sensor <Euro5>

• The throttle valve is shut (fully closed).

• Exhaust gas recirculation control is stopped (fully closed).

• DPF regeneration prohibited

No. 2 exhaust gas
temperature sensor (catalyst
temperature) <Euro5>

• The throttle valve is shut (fully closed).

• Exhaust gas recirculation control is stopped (fully closed).

• DPF regeneration prohibited

TROUBLESHOOTING

DIESEL FUEL

13A-19

No. 3 exhaust gas
temperature sensor (DPF
temperature) <Euro5>

• The throttle valve is shut (fully closed).

• Exhaust gas recirculation control is stopped (fully closed).

• DPF regeneration prohibited

Exhaust differential pressure
sensor <Euro5>

• The throttle valve is shut (fully closed).

• Exhaust gas recirculation control is stopped (fully closed).

• DPF regeneration prohibited

Injector

EGR control is stopped (fully closed).

Suction control valve

• Rail pressure is controlled in the range from 50 to 100 MPa.

• Fuel injection is restricted (output restriction).

• The open angle of the accelerator pedal is controlled.

• The throttle valve is shut (opening fixed)

• EGR control is stopped (fully closed).

EGR valve (DC motor)

EGR control is stopped (fully closed).

Throttle valve control servo

Power to the throttle valve control servo is interrupted.

Rail pressure too high

• The throttle valve is shut (opening fixed)

• The engine is stopped (fuel injection and pump pressure feed are

stopped).

Fuel leak

The engine is stopped (fuel injection and pump pressure feed are stopped).

Engine overrun

• The throttle valve is shut (opening fixed)

• The engine is stopped (fuel injection and pump pressure feed are

stopped).

Boost pressure too high

• Fuel injection is restricted (output restriction).

• EGR control is stopped (fully closed).

Engine-ECU (RAM error)

The engine is stopped (fuel injection and pump pressure feed are stopped).

Engine-ECU (sensor power
error)

• The accelerator pedal opening is controlled as 0%.

• Idle rotations are 1,300 r/min.

Engine-ECU (flash ROM
error, CPU error)

• Rail pressure is controlled in the range from 50 to 100 MPa.

• Fuel injection is restricted (output restriction).

• The open angle of the accelerator pedal is controlled.

• The throttle valve is shut (opening fixed)

• EGR control is stopped (fully closed).

Engine-ECU (insufficient
charging of capacitor for
injector)

• Rail pressure is controlled in the range from 50 to 100 MPa.

• Fuel injection is restricted (output restriction).

• The open angle of the accelerator pedal is controlled.

• EGR control is stopped (fully closed).

Engine-ECU (excessive
charging of capacitor for
injector)

The engine is stopped. (The fuel injection and pump delivery pressure are
stopped).

Injector drive circuit error

The engine is stopped. (The fuel injection and pump delivery pressure are
stopped).

Pressure limiter open valve
error

• Rail pressure is controlled in the range from 50 to 100 MPa.

• Fuel injection is restricted (output restriction).

• The open angle of the accelerator pedal is controlled.

• EGR control is stopped (fully closed).

Malfunctioning item

Control contents during malfunction

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