Mitsubishi Pajero Pinin. Manual — part 88
GDI –
Troubleshooting
13A-101
CHECK AT THE ENGINE-ECU TERMINALS
TERMINAL VOLTAGE CHECK CHART
Engine-ECU Connector Terminal Arrangement
Terminal No.
Check item
Check requirements (engine condition)
Normal condition
1
No. 1 injector
Engine: Warm up, and then depress
the accelerator pedal suddenly from
Decreases slightly for short
time from 9 – 13 V
9
No. 2 injector
the accelerator pedal suddenly from
the idle speed.
time from 9 – 13 V
24
No. 3 injector
2
No. 4 injector
3
No. 1 ignition coil
Engine: 3,000 r/min
0.3 – 3.0 V
13
No. 2 ignition coil
12
No. 3 ignition coil
4
No. 4 ignition coil
5
EGR valve (D)
Ignition switch: Immediately after
turning ON
5 – 8 V (fluctuates for
approx three seconds)
6
EGR valve (C)
turning ON
approx. three seconds)
32
EGR valve (B)
34
EGR valve (A)
34
EGR valve (A)
8
Alternator G terminal
Engine: Warm up, and then idling
Radiator fan: Not operating
Headlamp: OFF
→
ON
Stop lamp: OFF
→
ON
Rear defogger switch: OFF
→
ON
Voltage increases by
0.2 – 3.5 V
14
GDI ECO indication lamp
Ignition switch: OFF
→
ON
0 – 3 V (System voltage
after five seconds)
Engine: When the accelerator pedal is
suddenly depressed while the engine
is idling
System voltage
16
Purge control solenoid
valve
Engine cool-
ant tempera-
Engine: Stopped
System voltage
valve
ant tempera-
ture:
80 – 95
C
Ignition
switch: ON
Engine: Start the
engine, and then
increase engine
speed up to 3,500
r/min.
Voltage decreases
GDI –
Troubleshooting
13A-102
Terminal No.
Normal condition
Check requirements (engine condition)
Check item
18
Fan controller
Radiator and condenser fans are not
operating.
0 – 0.3 V
Radiator and condenser fans are
operating.
0.7 V or more
20
A/C relay
Engine: Idling
A/C switch: OFF
→
ON
(Compressor is operating)
System voltage, or changes
from momentarily 6 V or
more to 0
→
3 V
21
Fuel pump relay
Ignition switch:
ON
Engine: Stopped
System voltage
ON
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 (1st channel)
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 tempera-
ture sensor
Ignition switch:
ON
Engine coolant
temperature: 0
C
3.2 – 3.5 V
Engine coolant
temperature:
20
C
2.3 – 2.9 V
Engine coolant
temperature:
40
C
1.5 – 2.1 V
Engine coolant
temperature:
80
C
0.4 – 1.0 V
45
Engine ignition signal
Engine: 3,000 r/min
0.3 – 3.0 V
47
Power supply
Ignition switch: ON
System voltage
59
50
Camshaft position sensor
Engine: Cranking
0.4 – 3.0 V
Engine: Idling
0.5 – 2.0 V
51
Barometric pressure
sensor
Ignition switch:
ON
Altitude: 0 m
3.7 – 4.3 V
sensor
ON
Altitude: 1,200 m
3.2 – 3.8 V
52
Alternator FR terminal
Engine: Warm up, and then idling
Radiator fan: Not operating
Headlamp: OFF
→
ON
Stop lamp: OFF
→
ON
Rear defogger: OFF
→
ON
Voltage decreases
GDI –
Troubleshooting
13A-103
Terminal No.
Normal condition
Check requirements (engine condition)
Check item
53
Oxygen sensor (rear)
Transmission: 2nd gear
Engine speed: 3,500 r/min or more
Driving with the throttle valve widely
open
0.6 – 1.0 V
54
Power steering fluid
pressure switch
Engine: Warm
up, and then
idling
Steering wheel
stationary
System voltage
idling
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
57
Engine control relay
Ignition switch: OFF
0 – 3 V
Ignition switch: ON
System voltage
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 temper-
ature: 0
C
3.2 – 3.8 V
Intake air temper-
ature: 20
C
2.3 – 2.9 V
Intake air temper-
ature: 40
C
1.5 – 2.1 V
Intake air temper-
ature: 80
C
0.4 – 1.0 V
63
Stop lamp switch
Depress the brake pedal.
System voltage
Release the brake pedal.
0 – 3 V
68
Ignition switch-ST
Engine: Cranking
8 V or more
71
Oxygen sensor (front)
Engine: Warm up, and then hold the
engine speed at 2,500 r/min (Use a
digital voltmeter).
0
↔
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
GDI –
Troubleshooting
13A-104
Terminal No.
Normal condition
Check requirements (engine condition)
Check item
78
Throttle position sensor
(2nd channel)
Ignition switch:
ON
Release the
accelerator pedal.
4.0 – 4.8 V
Depress the
accelerator pedal
fully.
0.1 – 1.1 V
79
Accelerator pedal position
switch
Ignition switch:
ON
Release the
accelerator pedal.
0 – 1 V
Depress the
accelerator pedal
fully.
4 V or more
80
Vehicle speed sensor
Ignition switch: ON
Move the vehicle forward.
0
↔
system voltage
alternates.
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
(front)
Engine: Idling
0 – 3 V
(front)
Engine: 3,500 r/min
System voltage
90
Oxygen sensor heater
(rear)
Engine: Idling
0 – 3 V
(rear)
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 acceler-
ator pedal.
0.935 – 1.135 V
*
1
Depress the
accelerator pedal
fully.
4.1 V or more
*
2
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
Temperature at sensing portion:
Approx 25
°
C
Ignition switch: ON
2.0 – 2.9 V
99
Ignition switch-IG
Ignition switch: ON
System voltage
NOTE
Check if the difference in output between *1 and *2 is 4 V or more.
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