Mitsubishi Pajero Pinin. Manual - part 112

MPI <4G9> – 

Troubleshooting

13C-34

OK

Check the harness wires between
the crank angle sensor and the
engine-ECU crank angle sensor and
the engine control relay, and the
crank angle sensor and earth. Then,
repair if necessary.

OK

Check the trouble symptoms.

OK

Check the harness wire between the
crank angle sensor and the engine
control relay, and repair if necessary.

Check the following connectors:
A-36, A-43X

NG

Repair

OK

Check the trouble symptoms.

NG

Replace the engine-ECU.

(3) NG

OK

Use an analyzer to measure the
output waveform at the crank angle
sensor connector A-77.

D

Use the test harness
(MB991658) to connect the
connector, and measure at the
pick-up harness side.

D

Engine: Idling

D

The voltage between terminal 3
and earth
OK: A normal waveform should

be displayed as described
on P.13C-87 (Inspection
Procedure Using an Ana-
lyzer). Its maximum value
should be 4.8 V or more,
and its minimum value
should be 0.6 V or less
with no noise in waveform.

NG

Check the crank angle sensor vane.

NG

Replace

OK

Replace the crank angle sensor.

Check the trouble symptoms.

NG

Check the following connectors:
A-77, C-90

NG

Repair

NG

Replace the engine-ECU.

OK

Check the harness wire between
the crank angle sensor and the
engine-ECU, and repair if necessary.

OK

Measure at the crank angle sensor
connector A-77.

D

Disconnect the connector and
measure at the harness side.

(1) The resistance between terminal

1 and earth
OK: 2 

Ω

 or less

(2) The voltage between terminal 3

and earth
(Ignition switch: ON)
OK: 4.8  – 5.2 V

(3) The voltage between terminal 2

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

(1) NG

Check the harness between the
crank angle sensor and earth, and
repair if necessary.

NG

Repair

NG

Check the following connector:
C-90

NG

Repair

(2) NG

Measure at engine-ECU connector
C-90.

D

Measure the voltage at the
engine-ECU terminal.

D

Disconnect the connector A-77

D

Ignition switch: ON

D

The voltage between terminal 89
and earth
OK: 4.8  – 5.2 V

OK

Check the following connector:
C-90

OK

Check the harness wire between
the crank angle sensor and the
engine-ECU.

NG

Repair

From the previous page

MPI <4G9> – 

Troubleshooting

MPI <4G9> – 

Troubleshooting

13C-35

Code No. P0340 Camshaft position sensor system

Probable cause

Range of Check

D

After the engine was started

Set Conditions

D

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

D

Malfunction of the camshaft position sensor

D

Open or short circuit in the camshaft position
sensor circuit or loose connector contact.

D

Malfunction of engine-ECU

OK

Check the trouble symptoms.

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

OK

Check the harness wire between the
camshaft position sensor connector
and earth, and repair if necessary.

(3) NG

OK

Check the harness wire between
the camshaft position sensor
connector and the engine-ECU, and
repair if necessary.

NG

Repair

NG

NG

Repair

NG

Repair

(2) NG

Measure at engine-ECU connector
C-90.

D

Measure the voltage at the
engine-ECU terminal.

D

Disconnect connector A-66.

D

Ignition switch: ON

D

The voltage between terminal 2
and earth
OK: 4.8  – 5.2 V

OK

Check the following connector:
C-90

OK

Check the harness wire between
the camshaft position sensor
connector and the engine control
relay, and repair if necessary.

OK

Measure at camshaft position
sensor connector A-66.

D

Disconnect the connector and
measure at the harness side.

(1) The voltage between terminal 3

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

(2) The voltage between terminal 2

and earth
(Ignition switch: ON)
OK: 4.8  – 5.2 V

(3) The resistance between terminal

1 and earth
OK: 2 

Ω

 or less

(1) NG

Check the following connectors:
A-66, A-43X

NG

Repair

Replace the camshaft position
sensor.

Check the trouble symptoms.

OK

NG

Repair

OK

Check the harness wires between the camshaft position sensor connector and the
engine-ECU, the camshaft position sensor connector and the engine control relay, and
the camshaft position sensor connector and earth. Then, repair if necessary.

NG

Replace the engine-ECU.

OK

Check the harness wire between
the intermediate connector and the
engine-ECU.

NG

Repair

OK

Use an analyzer to measure the
output waveform at camshaft
position sensor connector A-66.

D

Use test harness (MB991709) 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 Ana-
lyzer), its maximum value
should be 4.8 V or more,
and its minimum value
should be 0.6 V or less
with no noise in waveform.

NG

NG

Check the camshaft position sensing
cylinder.

NG

OK

Check the trouble symptoms.

NG

Replace the engine-ECU.

Replace

Check the following connector:
A-66

Check the following connector:
C-90

Check the following connector:
A-66

MPI <4G9> – 

Troubleshooting

13C-36

Code No. P0403 EGR control solenoid valve system

Probable cause

Range of Check

D

Ignition switch: ON

D

Battery voltage is 10 V or more.

Set Conditions

D

The solenoid coil surge voltage (battery voltage + 2 V) is not detected
when the purge control solenoid valve is turned from on to off.

D

Malfunction of the EGR control solenoid valve

D

Open or short circuit in the EGR control solenoid
valve circuit or loose connector contact

D

Malfunction of engine-ECU

NG

Replace the engine-ECU.

OK

Check the trouble symptoms.

OK

NG

Repair

Check the harness wires between
the EGR control solenoid valve and
the engine control relay, and
between the purge control solenoid
valve and the engine-ECU.

OK

Check the following connector:
C-87

NG

Repair

OK

Replace the engine-ECU.

Repair

OK

NG

Check the harness wire between
the EGR control solenoid valve and
the engine-ECU.

NG

Check the following connector:
C-87

NG

Repair

OK

Measure at engine-ECU connector
C-87.

D

Measure the voltage at the
engine-ECU terminal.

D

Ignition switch: ON

D

The voltage between terminal 6
and earth
OK: System voltage

NG

Check the harness wire between
the EGR control solenoid valve and
the engine control relay, and repair
if necessary.

NG

Check the following connector:
A-36

NG

Repair

OK

Measure at the EGR control
solenoid valve connector A-03.

D

Disconnect the connector and
measure at the harness side.

D

Ignition switch: ON

D

The voltage between terminal 1
and earth
OK: System voltage

OK

Check the following connector:
A-03

NG

Repair

NG

Measure at the EGR control
solenoid valve connector A-03.

D

Disconnect the connector, and
measure at the solenoid valve
side.

D

The resistance between
terminals 1 and 2
OK: 28  – 36 

Ω

 (at 20

_

C)

NG

Replace

MUT-

II

 Actuator Test

10 EGR control solenoid valve

OK: Operating sound can be

heard and the valve vibrates.

OK

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

MPI <4G9> – 

Troubleshooting

13C-37

Code No. P0420 Catalyst malfunction

Probable cause

Range of Check

D

The engine speed is 3,000 r/min or less.

D

During driving

D

During air/fuel ratio feedback control

Set Conditions

D

The ratio between the oxygen sensor (rear) and the oxygen sensor (front)
output frequencies reaches 0.8 per 12 seconds on average.

D

Malfunction of catalyst

D

Malfunction of the oxygen sensor (front)

D

Malfunction of the oxygen sensor (rear)

D

Malfunction of engine-ECU

NG

Replace the engine-ECU.

Check the trouble symptoms.

NG

Replace the catalytic converter.

Check the trouble symptoms.

OK

Replace the oxygen sensor (rear).

Replace the oxygen sensor (front).

NG

OK

MUT-

II

 Data list

11 Oxygen sensor (front)

D

Transmission: 2nd gear <M/T>, L range <A/T>
OK: Changeover between 0 – 400 mV and 600 – 1,000

mV occur 15 times in 10 seconds.

NG

Check the oxygen sensor (front) system <sensor 1>
(Refer to P.13C-25, INSPECTION PROCEDURE FOR
DIAGNOSTIC TROUBLE CODE P0130.)

MUT-

II

 Data list

11 Oxygen sensor (front)

OK: 600  – 1,000 mV when racing suddenly

OK

NG

Check the oxygen sensor (rear) system <sensor 2>
(Refer to P.13C-27, INSPECTION PROCEDURE FOR
DIAGNOSTIC TROUBLE CODE P0136.)

OK

MUT-

II

 Data list

59 Oxygen sensor (rear)

D

Transmission: 2nd gear <M/T>, L range <A/T>

D

Drive with wide open throttle
OK: 600  – 1,000 mV

Check the exhaust manifold. (Are there any cracks?)

NG

Repair