Mitsubishi Pajero Pinin. Manual - part 106

 

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Mitsubishi Pajero Pinin. Manual - part 106

 

 

MPI <4G9> – 

Troubleshooting

13C-10

METHOD OF READING AND ERASING DIAGNOSIS
CODES

Refer to GROUP 00 – How to Use Troubleshooting/Inspection
Service Points.

INSPECTION USING MUT-

II

 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 harnesses and components.

2.

After repairing, re-check using the MUT-

II

 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 MUT-

II

, and then start the engine again and

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

MPI <4G9> – 

Troubleshooting

13C-11

FAIL-SAFE FUNCTION REFERENCE TABLE

When the main sensor malfunctions are detected by the diagnosis function, the vehicle is controlled by
means of the pre-set control logic to maintain safe conditions for driving.

Malfunctioning item

Control contents during malfunction

Air flow sensor

1.

Uses the throttle position sensor signal and engine speed signal (crank angle sensor
signal) to take reading of the basic injector drive time and basic ignition timing from
the pre-set mapping.

2.

Fixes the ISC servo in the appointed position so idle control is not performed.

Intake air temperature
sensor

Controls as if the intake air temperature is 25

_

C.

Throttle position 
sensor (TPS)

No increase in fuel injection amount during acceleration due to the throttle position sensor
signal.

Engine coolant 
temperature sensor

Controls as if the engine coolant temperature is 80

_

C.

Camshaft position sen-
sor

Injects fuel to all cylinders simultaneously. 
(However, after the ignition switch is turned to ON, the No.1 cylinder top dead centre is not
detected at all.)

Barometric pressure
sensor

Controls as if the barometric pressure is 101 kPa.

Detonation sensor

Switches the ignition timing from ignition timing for super petrol to ignition timing for standard
petrol.

Ignition coil, power
transistor

Cuts off the fuel supply to cylinders with an abnormal ignition.

Oxygen sensor (front)

Air/fuel ratio feedback control (closed loop control) is not performed.

Oxygen sensor (rear)

Performs the feedback control (closed loop control) of the air/fuel ratio by using only the signal
of the oxygen sensor (front) installed on the front of the catalytic converter.

Alternator FR terminal

Does not control the output of the alternator according to an electrical load. (works as a
normal alternator)

Misfiring

If the detected misfiring causes damage to the catalyst, the misfiring cylinder will be shut
down.

MPI <4G9> – 

Troubleshooting

13C-12

INSPECTION CHART FOR DIAGNOSIS CODES

Code No.

Diagnosis item

Reference page

P0100

Air flow sensor system

13C-14

P0105

Barometric pressure sensor system

13C-16

P0110

Intake air temperature sensor system

13C-18

P0115

Engine coolant temperature sensor system

13C-20

P0120

Throttle position sensor 1 system

13C-22

P0125

Feedback system

13C-24

P0130

Oxygen sensor (front) system

13C-25

P0135

Oxygen sensor heater (front) system

13C-26

P0136

Oxygen sensor (rear) system

13C-27

P0141

Oxygen sensor heater (rear) system

13C-28

P0170

Abnormal fuel system

13C-29

P0201

No. 1 injector system

13C-30

P0202

No. 2 injector system

13C-30

P0203

No. 3 injector system

13C-30

P0204

No. 4 injector system

13C-30

P0300

L

Ignition coil (power transistor) system

13C-31

P0301

No. 1 cylinder misfire detected

13C-32

P0302

No. 2 cylinder misfire detected

13C-32

P0303

No. 3 cylinder misfire detected

13C-32

P0304

No. 4 cylinder misfire detected

13C-32

P0325

Detonation sensor system

13C-33

P0335

Crank angle sensor system

13C-33

P0340

Camshaft position sensor system

13C-35

P0403

EGR valve system

13C-36

P0420

Catalyst malfunction

13C-37

P0443

Purge control solenoid valve system

13C-38

P0500

Vehicle speed sensor system

13C-39

P0505

Idle speed control system

13C-40

P0551

Power steering fluid pressure switch system

13C-43

P1603

Battery backup circuit malfunction

13C-44

P1610

Immobilizer system

13C-45

MPI <4G9> – 

Troubleshooting

13C-13

NOTE
1.

Do not replace the engine-ECU until a through terminal check reveals there are no short/open circuit.

2.

Check that the engine-ECU earth circuit is normal before checking for the cause of the problem.

3.

After the engine-ECU has detected a malfunction, a diagnosis code is recorded the next time the
engine is started and the same malfunction is re-detected. However, for items marked with a “

L

”,

the diagnosis code is recorded on the first detection of the malfunction.

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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