Mitsubishi Pajero Pinin. Manual — part 105
MPI <4G9> –
Special Tools
13C-6
SPECIAL TOOLS
Tool
Number
Name
Use
B
A
C
D
MB991223
A: MB991219
B: MB991220
C: MB991221
D: MB991222
Harness set
A: Test harness
B: LED harness
C: LED harness
adapter
D: Probe
D
Check at the ECU terminals
A:
Connector pin contact pressure inspection
B:
Power circuit inspection
C:
Power circuit inspection
D:
Commercial tester connection
MB991502
MUT-
II
sub
assembly
D
Reading diagnosis code
D
MPI system inspection
MB991348
Test harness set
D
Measurement of voltage during trouble-
shooting
D
Inspection using an analyzer
MB991709
Test harness
D
Measurement of voltage during trouble-
shooting
D
Inspection using an analyzer
D
Adjustment of throttle position sensor
MB991519
Alternator harness
connector
Measurement of voltage during troubleshoot-
ing
MD998478
Test harness
(3-pin, triangle)
D
Measurement of voltage during trouble-
shooting
D
Inspection using an analyzer
MPI <4G9> –
Special Tools
13C-7
Tool
Use
Name
Number
MD998709
Adaptor hose
Measurement of fuel pressure
MD998742
Hose adaptor
MB991637
Fuel pressure
gauge set
MD998706
Injector test set
Checking the spray condition of injectors
MB991607
Injector test
harness
MD998741
Injector test
adaptor
MB991608
Clip
MPI <4G9> –
Troubleshooting
13C-8
TROUBLESHOOTING
DIAGNOSIS TROUBLESHOOTING FLOW
Refer to GROUP 00 – How to Use Troubleshooting/Inspection
Service Point.
NOTE
If the engine-ECU for vehicles for GCC is replaced, the
immobilizer-ECU and ignition key should be replaced together
with it.
DIAGNOSIS FUNCTION
ENGINE WARNING LAMP (CHECK ENGINE LAMP)
If an abnormality occurs in any of the following items related
to the MPI system, the engine warning lamp will illuminate
or flash. If the lamp remains illuminated or if the lamp illuminates
while the engine is running, check the diagnosis code output.
However, the warning lamp will illuminate as bulb check for
five seconds whenever the ignition switch is turned to the
ON position.
Engine warning lamp inspection items
Code No.
Diagnosis item
–
Engine-ECU
P0100
Air flow sensor system
P0105
Barometric pressure sensor system
P0110
Intake air temperature sensor system
P0115
Engine coolant temperature sensor system
P0120
Throttle position sensor system
P0125
Feedback system
P0130
Oxygen sensor (front) system <sensor 1>
P0135
Oxygen sensor heater (front) system <sensor 1>
P0136
Oxygen sensor (rear) system <sensor 2>
P0141
Oxygen sensor heater (rear) system <sensor 2>
P0170
Abnormal fuel system
P0201
No. 1 injector system
P0202
No. 2 injector system
P0203
No. 3 injector system
P0204
No. 4 injector system
P0300
L
Ignition coil (power transistor) system
P0301
No. 1 cylinder misfire detected
P0302
No. 2 cylinder misfire detected
P0303
No. 3 cylinder misfire detected
P0304
No. 4 cylinder misfire detected
P0325
Detonation sensor system
Engine warning lamp
(check engine lamp)
MPI <4G9> –
Troubleshooting
13C-9
Code No.
Diagnosis item
P0335
Crank angle sensor system
P0340
Camshaft position sensor system
P0403
EGR valve system
P0420
Catalyst malfunction
P0443
Purge control solenoid valve system
P0500
Vehicle speed sensor system
P0505
Idle speed control system
P0551
Power steering fluid pressure switch system
P1603
Battery backup line system
NOTE
1.
If the engine warning lamp illuminates because of a malfunction of the engine-ECU, communication
between MUT-
II
and the engine-ECU is impossible. In this case, the diagnosis code cannot be read.
2.
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 “
L
”
in the diagnosis code number column, the engine warning lamp illuminates only on the first detection
of the malfunction.
3.
After the engine warning lamp illuminates, it will be switched off under the following conditions.
(1) When the engine-ECU monitored the power train malfunction three times* and met set condition
requirements, it detected no malfunction.
*:
In this case, “one time” indicates from engine start to stop.
(2) For misfiring malfunction, when driving conditions (engine speed, engine coolant temperature, etc.)
are similar to those when the malfunction was first recorded.
4.
Sensor 1 indicates the sensor mounted at a position closest to the engine, and sensor 2 indicates
the sensor mounted at the position second closest to the engine.
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