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.
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