Mitsubishi Space Star. Manual - part 27

GDI  – 

Troubleshooting

13A-35

NG

(2) NG

OK

(1) NG

Check the following connector:
B-86

From the previous page

OK

Check the harness wire between
the fuel pressure sensor connector
and the engine-ECU <M/T> or
engine-A/T-ECU <A/T>, and repair if
necessary.

Replace the fuel pressure sensor.

Check the trouble symptoms.

Check the following connectors:
B-87 <M/T>, B-86 <A/T>

NG

Repair

NG

Check the harness wire between
the fuel pressure sensor connector
and the engine-ECU <M/T> or
engine-A/T-ECU <A/T>, and repair if
necessary.

OK

Measure at engine-ECU connector
B-87 <M/T> or engine-A/T-ECU
connector B-86 <A/T>.



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



Engine: Idling



Voltage between terminal 92
<M/T>, 93 <A/T> and earth
OK: 0.3  – 4.7 V

NG

Check the following connectors:
B-87 <M/T> , B-86 <A/T>

NG

Repair

OK

Check the harness wire between
the fuel pressure sensor connector
and the engine-ECU <M/T> or
engine-A/T-ECU <A/T>, and repair if
necessary.

OK

Check the following connectors:
B-87 <M/T> , B-86 <A/T>

NG

Repair

OK

Check the trouble symptoms.

OK

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

OK

Repair

NG

(3) NG

Check the following connectors:
B-87 <M/T>, B-86 <A/T>

OK

Check the harness wire between
the fuel pressure sensor connector
and the engine-ECU <M/T> or
engine-A/T-ECU <A/T>, and repair if
necessary.

Repair

Measure at fuel pressure sensor
connector A-83.



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



Engine: Idling

(1) Voltage between terminal 1 and

earth
OK: 4.8  – 5.2 V

(2) Voltage between terminal 2 and

earth
OK: 0.3  – 4.7 V

(3) Voltage between terminal 3 and

earth
OK: 0.5 V or less

Code No. P0201 No. 1 injector system

Probable cause

Range of Check



The engine speed is 4,000 r/min or less.



The battery voltage is 10 V or more.



The fuel cut operation or the injector operation (by carrying out the Actuator
Test) is not in progress.

Set Conditions



The injector driver is not transmitting  a injector open circuit check signal
for four seconds.



Malfunction of No. 1 injector



Open or short circuit in the No. 1 injector circuit
or loose connector contact



Malfunction of engine-ECU <M/T>



Malfunction of engine-A/T-ECU <A/T>

GDI  – 

Troubleshooting

13A-36

NG

Check the following connector:
A-82

NG

Repair

OK

NG

Repair

MUT-

II

 Actuator Test

01 No. 1 injector

OK: The idling condition should

change.

OK

Check the trouble symptoms.

OK

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

NG

Replace the injector driver.

Check the trouble symptoms.

NG

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

OK

Measure at intermediate connector
A-82



Disconnect the connector and
measure at the harness side.



Resistance between terminals 1
and 2
OK: 0.9  – 1.1 

Ω

NG

Check the following connector:
A-48

NG

Repair

OK

Replace the No. 1 injector.

OK

Check the following connector:
A-52

NG

Repair

OK

Check the harness wire between
the injector driver and the
intermediate connector.

NG

Repair

OK

Check the following connector:
B-84

NG

Repair

OK

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

NG

Repair

OK

Use an analyzer to measure the
signal waveform at engine-ECU
connectors B-84 and B-87 <M/T> or
engine-A/T-ECU connector B-84 and
B-85 <A/T>.



Engine: Idling



Voltage between terminal 1 and
earth
OK: A normal waveform should

be displayed as described
on P.13A-118 (INSPEC-
TION PROCEDURE US-
ING AN ANALYZER).

NG

Check the following connector:
A-48

OK

Check the following connector:
A-48

NG

Repair

NG

OK

OK

Check the harness wire between
the No. 1 injector and the
intermediate connector.

NG

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

Repair

Repair

Check the harness wire between
No. 1 injector and the intermediate
connector.

OK

Check the harness wire between
No. 1 injector and the intermediate
connector.

NG

Repair

OK

Check the trouble symptoms.

NG

Replace the injector driver.

Replace the No. 1 injector.

GDI  – 

Troubleshooting

13A-37

Code No. P0202 No. 2 injector system

Probable cause

Range of Check



The engine speed is 4,000 r/min or less.



The battery voltage is 10 V or more.



The fuel cut operation or the injector operation (by carrying out the Actuator
Test) is not in progress.

Set Conditions



The injector driver is not transmitting  a injector open circuit check signal
for four seconds.



Malfunction of No. 2 injector



Open or short circuit in the No. 2 injector circuit
or loose connector contact



Malfunction of engine-ECU <M/T>



Malfunction of engine-A/T-ECU <A/T>

NG

Check the following connector:
A-82

NG

Repair

OK

NG

Repair

MUT-

II

 Actuator Test

02 No. 2 injector

OK: The idling condition should

change.

OK

Check the trouble symptoms.

OK

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

NG

Replace the injector driver.

Check the trouble symptoms.

NG

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

OK

Measure at intermediate connector
A-82



Disconnect the connector and
measure at the harness side.



Resistance between terminals 3
and 4
OK: 0.9  – 1.1 

Ω

NG

Check the following connector:
A-49

NG

Repair

OK

Replace the No. 2 injector.

OK

Check the following connector:
A-52

NG

Repair

OK

Check the harness wire between
the injector driver and the
intermediate connector.

NG

Repair

OK

Check the following connector:
B-84

NG

Repair

OK

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

NG

Repair

OK

Use an analyzer to measure the
signal waveform at engine-ECU
connectors B-84 and B-87 <M/T> or
engine-A/T-ECU connectors B-84
and B-85 <A/T>.



Engine: Idling



Voltage between terminal 9 and
earth
OK: A normal waveform should

be displayed as described
on P.13A-118 (INSPEC-
TION PROCEDURE US-
ING AN ANALYZER).

NG

Check the following connector:
A-49

OK

Check the following connector:
A-49

NG

Repair

OK

To the next page

NG

OK

OK

Check the harness wire between
the No. 2 injector and the
intermediate connector.

NG

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

Repair

Repair

Check the harness wire between
No. 2 injector and the intermediate
connector.

GDI  – 

Troubleshooting

GDI  – 

Troubleshooting

13A-38

OK

Check the harness wire between
No. 2 injector and the intermediate
connector.

NG

Repair

From the previous page

OK

Check the trouble symptoms.

NG

Replace the injector driver.

Replace the No. 2 injector.

Code No. P0203 No. 3 injector system

Probable cause

Range of Check



The engine speed is 4,000 r/min or less.



The battery voltage is 10 V or more.



The fuel cut operation or the injector operation (by carrying out the Actuator
Test) is not in progress.

Set Conditions



The injector driver is not transmitting  a injector open circuit check signal
for four seconds.



Malfunction of No. 3 injector



Open or short circuit in the No. 3 injector circuit
or loose connector contact



Malfunction of engine-ECU <M/T>



Malfunction of engine-A/T-ECU <A/T>

NG

Check the following connector:
A-82

NG

Repair

OK

NG

Repair

MUT-

II

 Actuator Test

03 No. 3 injector

OK: The idling condition should

change.

OK

Check the trouble symptoms.

OK

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

NG

Replace the injector driver.

Check the trouble symptoms.

NG

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

OK

Measure at intermediate connector
A-82.



Disconnect the connector and
measure at the harness side.



Resistance between terminals 5
and 6
OK: 0.9  – 1.1 

Ω

NG

Check the following connector:
A-54

NG

Repair

OK

Replace the No. 3 injector.

OK

Check the following connector:
A-54

NG

Repair

OK

Check the harness wire between
the injector driver and the
intermediate connector.

NG

Repair

OK

Check the following connector:
B-84

NG

Repair

OK

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

NG

Repair

OK

To the next page

Check the harness wire between
No. 3 injector and the intermediate
connector.