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Mitsubishi Pajero Pinin. Manual - part 105

MPI <4G9> –

Special Tools

13C-6

SPECIAL TOOLS

Tool

Number

Name

Use

MB991223
A: MB991219
B: MB991220
C: MB991221
D: MB991222

Harness set
A: Test harness
B: LED harness
C: LED harness

adapter

D: Probe

Check at the ECU terminals

Connector pin contact pressure inspection

Power circuit inspection

Commercial tester connection

MB991502

MUT-

sub

assembly

Reading diagnosis code

MPI system inspection

MB991348

Test harness set

Measurement of voltage during trouble-
shooting

Inspection using an analyzer

MB991709

Test harness

Measurement of voltage during trouble-
shooting

Inspection using an analyzer

Adjustment of throttle position sensor

MB991519

Alternator harness
connector

Measurement of voltage during troubleshoot-
ing

MD998478

Test harness
(3-pin, triangle)

Measurement of voltage during trouble-
shooting

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

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-

and the engine-ECU is impossible. In this case, the diagnosis code cannot be read.

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 diagnosis code number column, the engine warning lamp illuminates only on the first detection
of the malfunction.

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.

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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