Mitsubishi Space Star. Manual - part 31

GDI  – 

Troubleshooting

13A-51

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
<M/T> or engine-A/T-ECU <A/T>,
and repair if necessary.

NG

Repair

NG

NG

Repair

NG

Repair

(2) NG

Measure at engine-ECU connector
B-86 <M/T> or engine-A/T-ECU
connector B-85 <A/T>.



Measure the voltage at the
engine-ECU terminal <M/T> or
engine-A/T-ECU terminal <A/T>.



Disconnect connector A-81.



Ignition switch: ON



The voltage between terminal 50
<M/T>, 56<A/T>  and earth
OK: 4.8  – 5.2 V

OK

Check the following connectors:
B-86 <M/T>, B-85 <A/T>

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-81.



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 connector:
B-26

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 <M/T> or engine-A/T-ECU <A/T>, 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 <M/T> or
engine-A/T-ECU <A/T>.

OK

Check the harness wire between
the intermediate connector and the
engine-ECU <M/T> or
engine-A/T-ECU <A/T>.

NG

Repair

OK

Use an analyzer to measure the
output waveform at camshaft
position sensor connector A-81.



Use test harness (MB991709) to
connect the connector, and
measure at the pick-up harness.



Engine: Idling



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

be displayed as described
on P.13A-118 (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 <M/T> or
engine-A/T-ECU <A/T>.

Replace

Check the following connector:
A-81

Check the following connectors:
B-86 <M/T>, B-85 <A/T>

Check the following connectors:
B-86 <M/T>, B-85 <A/T>, B-26

GDI  – 

Troubleshooting

13A-52

Code No. P0403 EGR valve system

Probable cause

Range of Check



Ignition switch: OFF to ON



EGR valve is in operation after the engine starting process is complete.

Set Conditions



Off–surge voltage is not generated from the motor coil while the EGR valve
control motor is running.



Malfunction of the EGR valve



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



Malfunction of engine-ECU <M/T>



Malfunction of engine-A/T-ECU <A/T>

GDI  – 

Troubleshooting

13A-53

OK

Check the following connector:
A-62

NG

Repair

Measure at EGR valve connector
A-62.



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



The resistance between terminals
1 and 2



The resistance between terminals
2 and 3



The resistance between terminals
4 and 5



The resistance between terminals
5 and 6
OK: 10  – 20 

Ω

NG

Replace

OK

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

NG

Replace the engine-ECU <M/T> or
engine-A/T-ECU <A/T>.

OK

NG

Check the following connector: B-26

NG

Repair

OK

Measure at engine-ECU connector
B-84<M/T> or engine-A/T-ECU
connector B-85 <A/T>.



Measure the voltage at the
engine-ECU terminal <M/T> or
engine-A/T-ECU terminal <A/T>.



The voltage between terminal 5
<M/T>, 51 <A/T> and earth.



The voltage between terminal 6
<M/T>, 53 <A/T> and earth.



The voltage between terminal 32
<M/T>, 60 <A/T> and earth.



The voltage between terminal 34
<M/T>, 62 <A/T> and earth.

OK: The voltage changes as follows

for three seconds when the
ignition switch is turned ON. 
(When using a circuit tester) 
5 V and 8 V alternates 
(When  using an analyzer)
1 V or less and system voltage
alternates

NG

Check the following connectors: 
B-84 <M/T>, B-85 <A/T>

NG

Repair

OK

Check the harness wire between the
EGR valve and the engine-ECU <M/T>
or engine-A/T-ECU <A/T>.

OK

Check the following connectors: 
B-84 <M/T>, B-85 <A/T>

NG

Repair

OK

Check the harness wires between
the EGR valve and the engine
control relay, and between the EGR
valve and the engine-ECU <M/T> or
engine-A/T-ECU <A/T>.

NG

Repair

OK

Check the trouble symptoms.

OK

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

NG

Repair

OK

Replace the engine-ECU <M/T> or
engine-A/T-ECU <A/T>.

Measure at EGR valve connector
A-62.



Disconnect the connector and
measure at the harness side.



Ignition switch: ON



The voltage between terminal 2
and earth



The voltage between terminal 5
and earth
OK: System voltage

GDI  – 

Troubleshooting

13A-54

Code No. P0420 Catalyst malfunction

Probable cause

Range of Check



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



During driving



During air/fuel ratio feedback control

Set Conditions



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



Malfunction of catalyst



Malfunction of the oxygen sensor (front)



Malfunction of the oxygen sensor (rear)



Malfunction of engine-ECU <M/T>



Malfunction of engine-A/T-ECU <A/T>

Check the trouble symptoms.

NG

Replace the catalytic converter.

Check the trouble symptoms.

OK

Replace the oxygen sensor (rear).

OK

MUT-

II

 Data list

11 Oxygen sensor (front)



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.

Replace the oxygen sensor (front).

NG

MUT-

II

 Data list

11 Oxygen sensor (front)

OK: 600  – 1,000 mV when racing suddenly

OK

NG

Check the oxygen sensor (front) system <sensor 1>
(Refer to P.13A-26, INSPECTION PROCEDURE FOR
DIAGNOSTIC TROUBLE CODE P0130.)

OK

MUT-

II

 Data list

59 Oxygen sensor (rear)



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



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

NG

Check the oxygen sensor (rear) system <sensor 2>
(Refer to P.13A-29, INSPECTION PROCEDURE FOR
DIAGNOSTIC TROUBLE CODE P0136.)

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

NG

NG

Replace the engine-ECU <M/T> or engine-A/T-ECU <A/T>.

Repair