Mitsubishi Space Star. Manual - part 46

GDI  – 

Troubleshooting

13A-111

Engine-ECU Harness Side Connector Terminal Arrangement

Terminal No.

Check item

Standard value, normal condition (check require-
ments)

5 – 47

EGR valve (D)

15 – 20 

Ω

 (at 20



C)

6 –

 47

EGR valve (C)

32 – 47

EGR valve (B)

34 – 47

EGR valve (A)

16 – 47

Purge control solenoid valve

36 – 44 

Ω

 (at 20



C)

44 – 72

Engine coolant temperature sensor

5.1  – 6.5 k

Ω

 (when engine coolant temperature is

0



C)

2.1  – 2.7 k

Ω

 (when engine coolant temperature is

20



C)

0.9  – 1.3 k

Ω

 (when engine coolant temperature is

40



C)

0.26 – 0.36 k

Ω

 (when engine coolant temperature is

80



C)

46 – Body earth

Earth

Continuity (0 

Ω

)

58 – Body earth

62 – 72

Intake air temperature sensor

5.3 – 6.7 k

Ω

 (when intake air temperature is 0



C)

2.3 – 3.0 k

Ω

 (when intake air temperature is 20



C)

1.0 – 1.5 k

Ω

 (when intake air temperature is 40



C)

0.30 – 0.42 k

Ω

 (when intake air temperature is 80



C)

79 – 49

Accelerator pedal position switch

Continuity (when the accelerator pedal is released)

No continuity (when the accelerator pedal is slightly
depressed)

89 – 47

Oxygen sensor heater control (front)

4.5 – 8.0 

Ω

 (at 20



C)

90 – 47

Oxygen sensor heater (rear)

11 – 18 

Ω

 (at 20



C)

GDI  – 

Troubleshooting

13A-112

CHECK AT THE ENGINE-A/T-ECU TERMINALS <A/T>

TERMINAL VOLTAGE CHECK CHART

Engine-A/T-ECU Connector Terminal Arrangement

Terminal
No.

Check item

Check condition (Engine condition)

Normal condition

1

No. 1 injector

While engine is idling after having warmed up,
suddenly depress the accelerator pedal

From 9 – 13 V, momen-
tarily drops slightly

9

No. 2 injector

suddenly depress the accelerator pedal.

tarily drops slightly

24

No. 3 injector

2

No. 4 injector

3

Oxygen sensor heater
(front)

Engine: Idling

0 – 3 V

(front)

Engine: 3,500 r/min

System voltage

6

Injector driver relay

Ignition switch: OFF

0 – 0.1 V

Ignition switch: ON

0.5 – 1.0 V

8

Alternator G terminal



Engine: Idling after warming-up



Radiator fan: Not operating



Headlamp: OFF to ON



Stop lamp: OFF to ON



Defogger switch: OFF to ON

The voltage increases
by 0.2 – 3.5 V

54

Alternator FR terminal



Engine: Idling after warming-up



Radiator fan: Not operating



Headlamp: OFF to ON



Stop lamp: OFF to ON



Defogger switch: OFF to ON

The voltage drops

11

No. 1 ignition coil

Engine speed: 3,000 r/min

0.3 – 3.0 V

12

No. 2 ignition coil

31

No. 3 ignition coil

30

No. 4 ignition coil

14

Throttle control servo
relay

Ignition switch: OFF

0 – 0.1 V

relay

Ignition switch: ON

0.5 – 1.0 V

18

Fan controller

Condenser fan not operating

System voltage

Condenser fan operating

0 – 3 V or more

19

Air flow sensor reset
signal

Engine: Idling

0 – 1 V

signal

Engine speed: 3,000 r/min

6 – 9 V

GDI  – 

Troubleshooting

13A-113

Terminal
No.

Normal condition

Check condition (Engine condition)

Check item

20

A/C relay



Engine: Idling



A/C switch: OFF to ON (Compressor operating)

System voltage or
changes momentarily 6
V or more to 0 – 3 V

21

Fuel pump relay

Ignition switch: ON

System voltage

Engine: Idling

0 – 3 V

22

Engine warning lamp

Ignition switch: OFF to ON

System voltage

23

GDI ECO indication
lamp

Ignition switch: OFF 

→

 ON

0 – 3 V (System voltage
after five seconds)

Rev the engine suddenly.

System voltage

26

Oxygen sensor heater
(rear)

Engine: Idling

0 – 3 V

(rear)

Engine: 3,500 r/min

System voltage

34

Purge control solenoid
valve



Engine coolant
temperature:

Engine: Stopped

System voltage

valve

temperature: 
80  – 95



C



Ignition switch:
ON

Engine: After starting, in-
crease the engine speed
up to 3,500 r/min

The voltage drops

41

Power supply

Ignition switch: ON

System voltage

47

43

Engine ignition signal

Engine speed: 3,000 r/min

0.3 – 3.0 V

44

Engine coolant temper-
ature sensor

Ignition switch: ON

When engine coolant tem-
perature is 0



C

3.2 – 3.8 V

When engine coolant tem-
perature is 20



C

2.3 – 2.9 V

When engine coolant tem-
perature is 40



C

1.3 – 1.9 V

When engine coolant tem-
perature is 80



C

0.3 – 0.9 V

45

Crank angle sensor

Engine: Cranking

0.4 – 4.0 V

Engine: Idling

1.5 – 2.5 V

46

Power supply voltage
applied to accelerator
pedal position sensor
(1st channel)

Ignition switch: ON

4.5 – 5.5 V

49

Engine control relay

Ignition switch: OFF

0 – 3 V

Ignition switch: ON

System voltage

51

EGR valve (A)

Ignition switch: OFF to ON

5 – 8 V
(Repeatedly changes for

53

EGR valve (C)

(Repeatedly changes for
approx. 3 seconds)

60

EGR valve (B)

62

EGR valve (D)

GDI  – 

Troubleshooting

13A-114

Terminal
No.

Normal condition

Check condition (Engine condition)

Check item

52

Power steering fluid
pressure switch

Engine: Idling after
warming-up

When steering wheel is
stationary

System voltage

When steering wheel is
turned

0 – 3 V

55

Barometric pressure
sensor

Ignition switch: ON

At an altitude of 0 m

3.7 – 4.3 V

sensor

At an altitude of 1,200 m

3.2 – 3.8 V

56

Camshaft position sen-
sor

Engine: Cranking

0.4 – 3.0 V

sor

Engine: Idling

0.5 – 2.0 V

58

Ignition switch-ST

Engine: Cranking

8 V or more

61

A/C switch 2

Refer to GROUP 55 – Troubleshooting (Check at A/C-ECU or Engine-ECU
Terminal).

63

Injector open circuit
check signal

Engine: Increases from idling up to 4,000 r/min

The voltage decreases
slightly (approx. 0.7 V)
from 4.5 – 5.0 V.

64

Intake air temperature
sensor

Ignition switch: ON

When intake air tempera-
ture is 0



C

3.2 – 3.8 V

When intake air tempera-
ture is 20



C

2.3 – 2.9 V

When intake air tempera-
ture is 40



C

1.5 – 2.1 V

When intake air tempera-
ture is 80



C

0.4 – 1.0 V

65

Air flow sensor

Engine: Idling

2.2 – 3.2 V

Engine speed: 2,500 r/min

66

Backup power supply

Ignition switch: OFF

System voltage

71

Oxygen sensor (front)

Engine: Running at 2,500 r/min after warming-up
(Check by using a digital voltmeter.)

Voltages of 0 V and 0.8 V
alternate

73

Oxygen sensor (rear)



Transmission: L range



Engine speed: 3,500 r/min or more



Driving with the throttle valve widely open

0.6 – 1.0 V

78

Throttle position sen-
sor (2nd channel)

Ignition switch: ON

Release the accelerator
pedal.

4.5 – 5.5 V

Depress the accelerator
pedal fully.

0.4 – 0.6 V

79

Accelerator pedal posi-
tion switch

Ignition switch: ON

Release the accelerator
pedal.

0 – 1 V

Depress the accelerator
pedal slightly.

4 V or more

80

Vehicle speed sensor



Ignition switch: ON



Move the vehicle slowly forward

Voltages of 0 and 8 –12
V alternate (changes
repeatedly)