Mitsubishi Space Star. Manual - part 24

GDI  – 

Troubleshooting

13A-23

OK

Measure at throttle valve controller
connector B-15.



Measure voltage at the throttle
valve controller connector
terminals.



Ignition switch: ON



Voltage between terminal 7 and
earth
OK: Accelerator pedal fully re-

leased: 0.4 – 0.8 V
Accelerator pedal fully de-
pressed: 4.2 – 4.8 V

NG

Check the following connector:
B-15

NG

Repair

OK

Check the harness wire between
the throttle position sensor and the
throttle valve controller, and repair if
necessary.

OK

Check the following connector:
B-15

OK

Check the trouble symptoms.

NG

Replace the throttle valve controller.

From the previous page

NG

Repair

OK

Measure at throttle position sensor
connector A-66.



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



Ignition switch: ON

(1) Voltage between terminal 1 and

earth
OK: 4.8  – 5.2 V

(2) Voltage between terminal 2 and

earth
OK: Accelerator pedal fully re-

leased: 0.4 – 0.8 V
Accelerator pedal fully de-
pressed: 4.2 – 4.8 V

(3) Voltage between terminal 3 and

earth
OK: 0.5 V or less

(1) NG

Check the following connector:
B-15

NG

Repair

(3) NG

OK

Check the harness wire between
the throttle position sensor and the
throttle valve controller, and repair if
necessary.

(2) NG

Adjust the throttle position sensor.
(Refer to P.13A-96*.)

Check the following connector:
B-15

NG

Repair

OK

Check the harness wire between
the throttle position sensor and the
throttle valve controller, and repair if
necessary.

NOTE
*:

Refer to the ’99 SPACE STAR Workshop Manual (Pub. No. CMXE99E1)

GDI  – 

Troubleshooting

13A-24

Code No. P0125 Feedback system

Probable cause

Range of Check



The engine coolant temperature is approx. 80



C or more.



During stoichiometric feedback control



The vehicle is not being decelerated.

Set Conditions



Oxygen sensor (front) output voltage has been higher or lower than 0.5 V
for at least thirty seconds.



Malfunction of oxygen sensor (front)



Open or short circuit in the oxygen sensor (front)
circuit or loose connector contact



Malfunction of engine-ECU <M/T>



Malfunction of engine-A/T-ECU <A/T>

GDI  – 

Troubleshooting

13A-25

Repair

OK

Measure at oxygen sensor (front)
connector A-55.



Disconnect the connector and
measure at the harness side.



Resistance between terminal 2
and earth
OK: 2 

Ω

 or less

NG

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

NG

OK

Check the trouble symptoms.

Check the following connector:
A-55

NG

Repair

(2) NG

Check the oxygen sensor (front). 
(Refer to P.13A-128.)

NG

Replace

OK

Check the harness wire between
the oxygen sensor (front) and the
engine-ECU <M/T> or
engine-A/T-ECU <A/T>.

NG

Repair

NG

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

Repair

OK

Measure at oxygen sensor (front)
connector A-55.



Use the test harness
(MD998464) to connect the
connector, and measure at the
pick-up harness side.



Engine: 2,500 r/min (after
warming up)

(1) Voltage between terminal 2 and

earth
OK: 0.5 V or less

(2) Voltage between terminal 4 and

earth
OK: 0 V and 0.8 V alternate.

(1) NG

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

NG

OK

Check the harness wire between
the oxygen sensor (front) and the
engine-ECU <M/T> or
engine-A/T-ECU <A/T>, and repair if
necessary.

OK

NG

Repair

OK

Check the harness wire between
the oxygen sensor (front) and the
engine-ECU <M/T> or
engine-A/T-ECU <A/T>, and repair if
necessary.

OK

NG

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

NG

OK

Check the harness wire between
the oxygen sensor (front) 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>

OK

Repair

NG

Check the trouble symptoms.

OK

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

NG

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

Repair

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

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: 2,500 r/min (after
warming up)



Voltage between terminal 71 and
earth
OK: 0 V and 0.8 V alternate.

GDI  – 

Troubleshooting

13A-26

Code No. P0130 Oxygen sensor (front) system 
<sensor 1>

Probable cause

Range of Check



Three minutes have been passed since the engine has been started.



The engine coolant temperature is approx. 80



C or more.



Intake air temperature is 20 – 50



C



Engine speed is 1,200 r/min or more



Driving on a level surface at constant speed.

Set Conditions



The oxygen sensor (front) output voltage is 4.5 V or more when the sensor
output voltage is 0.2 V or less and a voltage of 5 V is applied to the
oxygen sensor (front) inside the engine-ECU.



Malfunction of oxygen sensor (front)



Open or short circuit in the oxygen sensor (front)
circuit or loose connector contact



Malfunction of engine-ECU <M/T>



Malfunction of engine-A/T-ECU <A/T>

Range of Check



Engine speed is 3,000 r/min or less



During driving



During air/fuel ratio feedback control

Set Conditions



The oxygen sensor (front) output frequency is five or less per 12 seconds
on average.