Mitsubishi Pajero Pinin. Manual - part 111

MPI <4G9> – 

Troubleshooting

13C-30

Code No. P0201 No. 1 injector system

Code No. P0202 No. 2 injector system

Code No. P0203 No. 3 injector system

Code No. P0204 No. 4 injector system

Probable cause

Range of Check

D

Engine speed is approx. 50 – 1,000 r/min

D

The throttle position sensor output voltage is 1.15 V or less.

D

Actuator test by MUT-

II

 is not carried out.

Set Conditions

D

Surge voltage of injector coil is not detected for 4 seconds.

D

Malfunction of the injector

D

Improper connector contact, open circuit or short-cir-
cuited harness wire of the injector circuit

D

Malfunction of engine-ECU

NG

Replace the engine-ECU.

NG

Use an analyzer to measure the signal waveform at injector
connector A-61, A-62, A-63, A-64.

D

Use a test harness (MB991348) to connect the connector, and
measure at the pick-up harness side.

D

Engine: Idling

D

The voltage between terminal 2 and earth
OK: A normal waveform should be displayed as de-

scribed on P.13C-87 (INSPECTION PROCEDURE
USING AN ANALYZER).

OK

Intermittent malfunction 
(Refer to GROUP 00 – Points to Note for Intermittent Malfunctions.)

OK

Check the trouble symptoms.

OK

Measure at the engine-ECU connector C-87.

D

Disconnect the connector, and measure at the harness side.

D

Voltage between 1, 2, 14, 15 and earth (Ignition switch: ON)
OK: System voltage

NG

Check the harness wire between the engine-ECU and the injector
connector, and repair if necessary.

OK

Check the following connector: C-87

NG

Repair

OK

Measure at the injector connector A-61, A-62, A-63, A-64.

D

Disconnect the connector, and measure at the harness side.

D

Voltage between 1 and earth (Ignition switch: ON)
OK: System voltage

NG

Check the harness wire between the engine control relay and the
injector connector, and repair if necessary.

OK

Check the injector. (Refer to P.13C-106.)

NG

Replace

NG

Check the following connectors:
A-61, A-62, A-63, A-64

NG

Repair

MUT-

II

 Actuator Test

01 No. 1 injector
02 No. 2 injector
03 No. 3 injector
04 No. 4 injector

OK: The idling condition should change

OK

Intermittent malfunction 
(Refer to GROUP 00 – Points to Note for Intermittent Malfunctions.)

MPI <4G9> – 

Troubleshooting

MPI <4G9> – 

Troubleshooting

13C-31

Code No. P0300 Ignition coil (power transistor) system

Probable cause

Range of Check

D

Engine speed is approx. 50 – 4,000 r/min.

D

Engine is not cranking.

Set Conditions

D

The ignition failure sensor does not send a signal about a certain cylinder
for 4 seconds.

D

Malfunction of the ignition coil

D

Malfunction of the ignition failure sensor

D

Malfunction of spark plug

D

Open or short circuit in  the primary ignition
circuit or loose connector contact

D

Malfunction of engine-ECU

OK

Check the following connector:
C-87

NG

Repair

OK

Check the spark plug and the
ignition coil for a defective cylinder.
(Refer to GROUP 16 – Ignition
System.)

NG

Replace

OK

Use an analyzer to measure the signal waveform at engine-ECU connector C-87
connector.

D

Engine: Idling

D

The voltage between the ignition coil primary signal terminal for a defective
cylinder and earth
OK: A normal waveform should be displayed as described on P.13C-87 (Inspec-

tion Procedure Using an Analyzer).

OK

Repair the ignition coil assembly for
a defective cylinder and the spark
plug.

NG

Replace the engine-ECU.

NG

Check the spark plug and the
ignition coil for a defective cylinder.
(Refer to GROUP 16 – Ignition
System.)

Check the trouble symptoms.

NG

Replace the engine-ECU.

MUT-

II

 Actuator Test

01 No. 1 injector
02 No. 2 injector
03 No. 3 injector
04 No. 4 injector

OK: The idling condition should

change.

Reference
When the cylinder (defective
cylinder) where idling condition does
not change is detected after
suspending the injector, go to (1)
and inspect the spark plug, the
ignition coil, the connector, and the
harness of the defective cylinder.
(When more than one cylinder are
detected, inspect all of them.)
When all the cylinders are OK, go
to (2).

(1)

Check the following connectors:
The ignition coil connectors, which
correspond to defective cylinders
(A-13, A-14).

NG

Repair

(2)

Use an analyzer to measure the
signal waveform at the ignition
failure sensor connector A-90.

D

Use test harness (MB991536) to
connect the connector, and
measure at the pick-up harness.

D

Engine: Idling

D

The voltage between terminal 2
and earth
OK: A normal waveform should

be displayed as described
on P.13C-87 (INSPECTION
PROCEDURE USING AN
ANALYZER).

Reference
When a normal waveform is
displayed, compare it with that of
the ignition coil primary signal at the
engine-ECU terminal to determine
the cylinder  (defective cylinder) with
an abnormal waveform.

→

When one or more cylinders are

abnormal, go to (1)

→

When all of the cylinders are

abnormal, go to (3)

→

When a normal waveform is

displayed, go to (4).

(3)

Check the following connector:
C-89

NG

Repair

OK

Check the harness wires between
the ignition failure sensor and the
engine-ECU, and between the
ignition failure sensor and earth.

NG

Repair

OK

Repair the ignition failure sensor.

(4)

Check the trouble symptoms.

OK

Intermittent malfunction 
(Refer to GROUP 00 – Points to
Note for Intermittent Malfunctions.)

(1)

MPI <4G9> – 

Troubleshooting

13C-32

Code No. P0301 No. 1 cylinder misfire detected

Code No. P0302 No. 2 cylinder misfire detected

Code No. P0303 No. 3 cylinder misfire detected

Code No. P0304 No. 4 cylinder misfire detected

Probable cause

Range of Check

D

The engine speed is 500 – 4,500 r/min.

D

While the engine is running except deceleration and sudden acceleration.

Set Conditions

D

The number of misfires exceeds a predetermined number per 200 engine
revolutions (Misfire has occurred in only one cylinder).

or

D

The number of misfires exceeds a predetermined number per 100 engine
revolutions (Misfire has occurred in only one cylinder).

D

Malfunction of the ignition system

D

Abnormal compression

D

Malfunction of injector

D

Malfunction of engine-ECU

NG

Check the harness wire between the
ignition coil and the engine-ECU.

NG

Replace

NG

Repair

(2) NG

OK

Check the ignition failure sensor
(Refer to GROUP 16 – Ignition
System.)

OK

Check the harness wire between
the ignition coil and the earth, and
repair if necessary.

(3) NG

OK

Measure at ignition coil connectors
A-13, A-14.

D

Disconnect the connector and
measure at the harness side.

(1) The voltage between terminal 1

and earth
(Ignition switch: ON)
OK: System voltage

(2) The voltage between terminal 3

and earth
(Engine: Cranking)
OK: 0.5  – 4.0 V

(3) The resistance between terminal

2 and earth
OK: 2 

Ω

 or less

(1) NG

Check the following connectors:
A-13, A-14, A-90

NG

Repair

Check the ignition coil (Refer to
GROUP 16 – Ignition System.)

Check the compression pressure.
(Refer to GROUP 11B – On-vehicle
Service.)

Repair

Replace the engine-ECU.

OK

Check the harness wire between the
ignition coil and the ignition failure
sensor, and between the ignition
switch and the ignition failure sensor.

NG

Repair

OK

NG

NG

Repair

OK

Replace

NG

Check the spark plugs.

Check the trouble symptoms.

OK

Check the trouble symptoms.

NG

Replace the engine-ECU.

Check the following connectors:
A-13, A-14

Check the following connectors:
A-13, A-14, C-87

OK

MPI <4G9> – 

Troubleshooting

MPI <4G9> – 

Troubleshooting

13C-33

Code No. P0325 Detonation sensor system

Probable cause

Range of Check

D

Engine: Two seconds after the engine has been started

Set Conditions

D

Changes in sensor output voltage (detonation sensor peak voltage per 1/2
crankshaft rotation) in 200 consecutive cycles are 0.06 V or less.

D

Malfunction of the detonation sensor

D

Open or short circuit in the detonation sensor
circuit or loose connector contact

D

Malfunction of engine-ECU

OK

Check the trouble symptoms.

OK

Intermittent malfunction 
(Refer to GROUP 00 – Points to Note for Intermittent
Malfunctions.)

Check the following connector: A-81

NG

Repair

OK

Measure at the detonation sensor connector A-81.

D

Disconnect the connector and measure at the harness
side.

D

The resistance between terminal 2 and earth
OK: 2 

Ω

 or less

NG

Check the harness wire between the detonation sensor and
earth, and repair if necessary.

OK

Check the following connector: C-90

NG

Repair

OK

Check the harness wire between the detonation sensor and
the engine-ECU.

NG

Repair

NG

Replace the detonation sensor.

Check the trouble symptoms.

NG

Replace the engine-ECU.

Code No. P0335 Crank angle sensor system

Probable cause

Range of Check

D

Engine is cranking

Set Conditions

D

Sensor output voltage does not change for 4 seconds (no pulse signal
input).

D

Malfunction of the crank angle sensor.

D

Open or short circuit in the crank angle sensor
circuit or loose connector contact.

D

Malfunction of engine-ECU

NG

Check the following connector:
A-77

NG

Repair

MUT-

II

 Data list

22 Crank angle sensor

OK: Refer to P.13C-74, DATA

LIST REFERENCE TABLE.

OK

Intermittent malfunction 
(Refer to GROUP 00 – Points to
Note for Intermittent Malfunctions.)

OK

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