Mitsubishi Space Star. Manual - part 78

DIESEL FUEL – 

Troubleshooting

13D-11

Code No. 14 Accelerator pedal position sensor (2nd
channel) system

Probable cause

Range of Check



Ignition switch: ON

Set Conditions



Sensor output voltage is 200 mV or less

or



Sensor output voltage is 2,500 mV or more

Range of Check



Ignition switch: ON

Set Conditions



Output difference compared to accelerator pedal position sensor (1st
channel) is 6 % or more



Malfunction of the accelerator pedal position
sensor (2nd channel)



Improper connector contact, open circuit or
short-circuited harness wire of the accelerator
pedal position sensor (2nd channel) circuit



Malfunction of the engine-ECU

Repair

NG

OK

Measure at the accelerator pedal position sensor connector B-93.



Disconnect the connector and measure at the harness
side.



Voltage between 2 and earth (Ignition switch: ON)
OK: 4.8  – 5.2 V



Continuity between 6 and earth
OK: Continuity

NG

Check the following connectors: B-89, A-122

OK

MUT-

II

 Data list

09 Accelerator pedal position sensor (2nd channel) 
(Refer to P.13D-46.)

OK

Check the harness wire between the accelerator pedal
position sensor and the engine-ECU.

Replace

NG

Check the following connectors: B-89, B-93, A-122

NG

Repair

NG

NG

OK

Check the harness wire between the accelerator pedal
position sensor and the engine-ECU (sensor signal line).

OK

Check trouble symptom.

OK

Check trouble symptom.

Repair

NG

Replace the engine-ECU.

NG

NG

Replace the engine-ECU.

INTERMITTENT MALFUNCTIONS
Refer to GROUP 00 – Points to Note for Intermittent
Malfunctions*

Check the accelerator pedal position sensor (2nd channel)
(Refer to P.13D-53.)

NG

OK

Repair

NG

*:

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

DIESEL FUEL – 

Troubleshooting

13D-12

Code No. 15 Fuel pressure sensor system

Probable cause

Range of Check



Ignition switch: ON

Set Conditions



Sensor output voltage is 250 mV or less

or



Sensor output voltage is 4,750 mV or more

Range of Check



During engine running

Set Conditions



Fuel pressure varies greatly from command value



Malfunction of the fuel pressure sensor



Improper connector contact, open circuit or
short-circuited harness wire of the fuel pressure
sensor circuit



Malfunction of the engine-ECU

OK

Replace the engine-ECU.

NG

Repair

NG

NG

Check the harness wire between the fuel pressure sensor
and the engine-ECU (sensor signal line).

NG

Check trouble symptom.

Replace the fuel pressure sensor.

NG

OK

Check trouble symptom.

OK

Repair

NG

Check the following connectors: A-119, A-121

OK

Repair

NG

Replace the engine-ECU.

Check the harness wire between the fuel pressure sensor and
the engine-ECU.

NG

OK

Check trouble symptom.

Repair

NG

NG

Check the following connector: A-120, A-121

Measure at the fuel pressure sensor connector A–119.



Disconnect the connector and measure at the harness
side.



Voltage between 1 and earth (Ignition switch: ON)
OK: 4.8  – 5.2 V



Continuity between 3 and earth
OK: Continuity

NG

OK

INTERMITTENT MALFUNCTIONS
Refer to GROUP 00 – Points to Note for Intermittent
Malfunctions*

MUT-

II

 Data list

06 Fuel pressure sensor (Refer to P.13D-46.)

OK

NG

Replace the engine-ECU.

NG

Check trouble symptom.

MUT-

II

 Data list

07 Fuel pressure sensor (command value)
(Refer to P.13D-46.)

*:

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

DIESEL FUEL – 

Troubleshooting

13D-13

Code No. 16 Boost sensor system

Probable cause

Range of Check



Ignition switch: ON

Set Conditions



Sensor output voltage is 100 mV or less for 1 second

or



Sensor output voltage is 4,900 mV or more for 1 second

Range of Check



Engine speed: 900 r/min or less

Set Conditions



Variation from barometric pressure sensor output signal is 15 kPa or more
for 4.6 seconds



Malfunction of the boost sensor



Improper connector contact, open circuit or
short-circuited harness wire of the boost sensor
circuit



Malfunction of the engine-ECU

OK

Replace the engine-ECU.

NG

Repair

Check the harness wire between the boost sensor and the
engine-ECU (sensor signal line).

NG

Check trouble symptom.

Replace the boost sensor.

NG

OK

Check trouble symptom.

OK

Repair

NG

Check the following connectors: A-112, A-121

Replace the engine-ECU.

NG

Check trouble symptom.

OK

Repair

NG

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

OK

Repair

NG

NG

Check the following connectors: A-120, A-121

Measure at the boost sensor connector A-122.



Disconnect the connector and measure at the harness
side.



Voltage between 1 and earth (Ignition switch: ON)
OK: 4.8  – 5.2 V



Continuity between 3 and earth
OK: Continuity

NG

OK

INTERMITTENT MALFUNCTIONS
Refer to GROUP 00 – Points to Note for Intermittent
Malfunctions*

MUT-

II

 Data list

04 Boost sensor (Refer to P.13D-46.)

*:

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

DIESEL FUEL – 

Troubleshooting

13D-14

Code No. 17 Barometric pressure sensor system

Probable cause

Range of Check



Ignition switch: ON

Set Conditions



Sensor output voltage is 200 mV or less for 1 second

or



Sensor output voltage is 4,950 mV or more for 1 second



Malfunction of the barometric pressure sensor



Malfunction of the engine-ECU

OK

Replace the engine-ECU.

INTERMITTENT MALFUNCTIONS
Refer to GROUP 00 – Points to Note for Intermittent
Malfunctions*

MUT-

II

 Data list

05 Barometric pressure sensor (Refer to P.13D-46.)

Check trouble symptom.

NG

NG

*:

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