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
2
Ignition cycle
−
4
Accumulated minute
*1
min
500
*2
Air flow sensor
g/s
501
*2
Throttle position sensor (main)
%
507
*2
Target exhaust gas recirculation valve
%
508
*2
Barometric pressure sensor
kPa
509
*2
Relative throttle position sensor
%
511
*2
Accelerator pedal position sensor (main)
%
512
*2
Accelerator pedal position sensor (sub)
%
516
*2
Engine coolant temperature sensor
°C
525
*2
Manifold absolute pressure sensor
kPa
526
*2
Crank angle sensor
r/min
527
*2
Vehicle speed
km/h
529
*2
Intake air temperature sensor
°C
530
*2
Time since engine running
*3
sec
537
*2
Power supply voltage
V
541
*2
Throttle valve control servo
%
560
*2
Rail pressure sensor
kPa
573
*2
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
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст