Mitsubishi Pajero Pinin. Manual - part 53

GDI – 

Troubleshooting

13A-78

Terminal
No.

Normal condition

Check requirements (engine condition)

Check item

21

Fuel pump relay

Ignition switch: ON

Engine: stopped

System voltage

Engine: Idling

0 – 3 V

31

Engine warning lamp

Ignition switch: OFF 

→

 ON

0 – 3 V 

→

 System

voltage (after several
seconds)

41

Sensor power supply

Ignition switch: ON

4.5 – 5.5 V

42

Power supply to
accelerator pedal
position sensor

Ignition switch: ON

4.5 – 5.5 V

43

Crank angle sensor

Engine: Cranking

0.4 – 4.0 V

Engine: Idling

1.5 – 2.5 V

44

Engine coolant
temperature sensor

Ignition switch: ON

Engine coolant
temperature: 0

_

C

3.2 – 3.8 V

Engine coolant
temperature: 20

_

C

2.3 – 2.9 V

Engine coolant
temperature: 40

_

C

1.3 – 1.9 V

Engine coolant
temperature: 80

_

C

0.3 – 0.9 V

45

Tachometer output

Engine: 3,000 r/min

2.0 – 9.0 V

47

Power supply

Ignition switch: ON

System voltage

59

50

Camshaft position
sensor

Engine: Cranking

0.3 – 3.0 V

sensor

Engine: Idling

0.5 – 3.5 V

51

Barometric pressure
sensor

Ignition switch: ON

Altitude: 0 m

3.7 – 4.3 V

sensor

Altitude: 1,200 m

3.2 – 3.8 V

52

Alternator FR terminal

D

Engine: Warm up, and then idling

D

Radiator fan: not operating

D

Headlamp: OFF 

→

 ON

D

Stop lamp: OFF 

→

 ON

D

Rear defogger switch: OFF 

→

 ON

Voltage decrease

54

Power steering fluid
pressure switch

Engine: Warm up, and
then idling

Steering wheel
stationary

System voltage

Steering wheel turning

0 – 3 V

55

Injector driver relay

Ignition switch: OFF

0 – 0.1 V

Ignition switch: ON

0.5 – 1.0 V

56

Throttle valve control
servo relay

Ignition switch: OFF

0 – 0.3 V

servo relay

Ignition switch: ON

0.5 – 1.0 V

GDI – 

Troubleshooting

13A-79

Terminal
No.

Normal condition

Check requirements (engine condition)

Check item

57

Engine control relay

Ignition switch: OFF

System voltage

Ignition switch: ON

0 – 3 V

60

Back-up power source

Ignition switch: OFF

System voltage

61

Air flow sensor

Engine: Idling

2.2 – 3.2 V

Engine: 2,500 r/min

62

Intake air temperature
sensor

Ignition switch: ON

Intake air temperature:
0

_

C

3.2 – 3.8 V

Intake air temperature:
20

_

C

2.3 – 2.9 V

Intake air temperature:
40

_

C

1.5 – 2.1 V

Intake air temperature:
80

_

C

0.4 – 1.0 V

63

Stop lamp switch

Depress the brake pedal.

System voltage

Release the brake pedal.

0 – 3 V

67

Inhibitor switch <A/T>

Ignition switch: ON

Selector  lever: P or N
range

0 – 3 V

Selector  lever: Other
than P or N range

8 – 14 V

68

Ignition switch – ST

Engine: Cranking

8 V or more

71

Oxygen sensor

Engine: Warm up, and then hold the engine
speed at 2,500 r/min (Use a digital voltmeter).

0 V 

↔

 0.8 V alternates

74

Brake vacuum sensor

Engine: Stop the engine from idle speed, turn
the ignition switch ON, and then depress the
brake pedal several times.

Voltage increases

76

Air flow sensor reset
signal

Engine: Idling

0 – 1 V

signal

Engine: 3,000 r/min

6 – 9 V

78

Throttle position
sensor (2nd channel)

Ignition switch: ON

Release the accelera-
tor pedal.

4.0 – 4.8 V

Depress the accelera-
tor pedal fully.

0.1 – 1.1 V

79

Accelerator pedal
position switch

Ignition switch: ON

Release the accelera-
tor pedal.

0 – 1 V

Depress the accelera-
tor pedal slightly.

4 V or more

80

Vehicle speed sensor

D

Ignition switch: ON

D

Move the vehicle forward.

0 V 

↔

 Battery voltage

(alternates repeatedly)

GDI – 

Troubleshooting

13A-80

Terminal
No.

Normal condition

Check requirements (engine condition)

Check item

83

A/C switch

Engine: idling

A/C switch: OFF

0 – 3 V

A/C switch: ON
(Compressor is
operating)

System voltage

88

Small lamp switch

Lighting switch: OFF

0 – 3 V

Lighting switch: ON (Taillamp: ON)

System voltage

89

Oxygen sensor heater

Engine: Idling

0 – 3 V

Engine: 3,500 r/min

System voltage

92

Fuel pressure sensor

Engine: Idling

0.3 – 4.7 V

94

Accelerator pedal
position sensor (1st
channel)

Ignition switch: ON

Release the accelera-
tor pedal.

0.935 – 1.135 V

channel)

Depress the accelera-
tor pedal fully.

4.1 V or more

96

Injector open circuit
check signal

Engine: Increase engine speed from idle speed
to 4,000 r/min.

Decreases slightly
(approx.0.7 V) from 
4.5 V – 5.0 V.

97

A/C thermo sensor

D

Temperature at sensing portion: Approx. 25

_

C

D

Ignition switch: ON

2.0 – 2.9 V

99

Ignition switch – IG

Ignition switch: ON

System voltage

GDI – 

Troubleshooting

13A-81

CHECK CHART FOR RESISTANCE AND CONTINUITY
BETWEEN TERMINALS

1.

Turn the ignition switch to OFF.

2.

Disconnect the engine-ECU connector.

3.

Measure the resistance and check for continuity between
the terminals of the engine-ECU harness-side connector
while referring to the check chart.

NOTE
(1) When measuring resistance and checking continuity,

a harness for checking contact pin pressure should
be used instead of inserting a test probe.

(2) Checking need not be carried out in the order given

in the chart.

Caution
If the terminals that should be checked are mistaken,
or if connector terminals are not correctly shorted
to earth, damage may be caused to the vehicle wiring,
sensors, engine-ECU and/or ohmmeter.
Be careful to prevent this!

4.

If the ohmmeter shows any deviation from the standard
value, check the corresponding sensor, actuator and
related electrical wiring, and then repair or replace.

5.

After repair or replacement, recheck with the ohmmeter
to confirm that the repair or replacement has corrected
the problem.