Mitsubishi L200. Manual — part 197
TROUBLESHOOTING
DIESEL FUEL
13A-584
Engine-ECU Harness Side Connector Terminal Arrangement
AK800888
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
43
44
45
46
47
48
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
146
147
148
149
150
151
152
153
154
155
156
157
158
117
145
116
144
AB
D-215
D-213
Engine-ECU harness side connector
Terminal No.
Inspection item
Normal condition (Check condition)
1
− 2
No. 1 injector
Approximately 0.45
Ω (at 20°C)
73
− 75
<Euro5>
25
− 75 <Except
Euro5>
No. 2 injector
49
− 50
<Euro5>
25
− 50 <Except
Euro5>
No. 3 injector
25
− 27
<Euro5>
1
− 27 <Except
Euro5>
No. 4 injector
17
− 101
Variable geometry control solenoid
valve <Euro5>
10
− 14 Ω (at 20°C)
30
− 36
EGR gas temperature sensor
<Euro5>
55
− 78 kΩ (at −20°C)
29
− 41 kΩ (at 0°C)
17
− 23 kΩ (at 20°C)
10
− 14 kΩ (at 40°C)
7.1
− 8.8 kΩ (at 60°C)
4.8
− 5.9 kΩ (at 80°C)
32
− 38
No. 2 intake air temperature sensor
<Except Euro5>
13
− 18 kΩ (at −20°C)
5.1
− 6.9 kΩ (at 0°C)
2.0
− 3.0 kΩ (at 20°C)
0.9
− 1.5 kΩ (at 40°C)
0.40
− 0.78 kΩ (at 60°C)
0.23
− 0.42 kΩ (at 80°C)
39
− 155
Battery temperature sensor <Euro5> 4.9
− 5.3 kΩ (at 0°C)
2.2
− 2.6 kΩ (at 20°C)
1.0
− 1.4 kΩ (at 40°C)
55
− 79
Fuel temperature sensor
2.0
− 3.0 kΩ (at 20 °C)
58
− 82
No. 1 exhaust gas temperature
sensor
<Euro5>
120
− 560 kΩ (at 20°C)
TROUBLESHOOTING
DIESEL FUEL
13A-585
INSPECTION PROCEDURE USING
OSCILLOSCOPE
M1133004600588
The output signals of the sensors and the conditions
of the actuation signals of the actuators can be
inspected visually by observing the waveforms on
the oscilloscope.
CAMSHAFT POSITION SENSOR AND
CRANK ANGLE SENSOR
Measurement Method
1. Disconnect the camshaft position sensor
connector and connect the special tool test
harness (MB991709) in between (All terminals
should be connected).
59
− 83
No. 2 exhaust gas temperature
sensor (catalyst temperature)
<Euro5>
120
− 560 kΩ (at 20°C)
60
− 84
No. 3 exhaust gas temperature
sensor (DPF temperature)
<Euro5>
120
− 560 kΩ (at 20°C)
62
− 86
No. 1 intake air temperature sensor
13
− 18 kΩ (at −20°C)
4.8
− 7.0 kΩ (at 0°C)
2.1
− 2.8 kΩ (at 20°C)
0.9
− 1.5 kΩ (at 40°C)
0.47
− 0.69 kΩ (at 60°C)
0.27
− 0.39 kΩ (at 80°C)
63
− 87
Engine coolant temperature sensor
14
− 17 kΩ (at −20°C)
5.1
− 6.5 kΩ (at 0°C)
2.1
− 2.7 kΩ (at 20°C)
0.9
− 1.3 kΩ (at 40°C)
0.48
− 0.68 kΩ (at 60°C)
0.26
− 0.36 kΩ (at 80°C)
116
− Body
earth
Engine-ECU earth
Continuity (2
Ω or less)
117
− Body
earth
145
− Body
earth
114
− 129
Throttle valve control servo
0.3
− 100 Ω (at 20 °C)
131
− 146
Suction control valve
Approximately 2.1
Ω (at 20°C)
Terminal No.
Inspection item
Normal condition (Check condition)
3
2
1
3
2
1
AK501436
Special patterns
pick-up
Oscilloscope
AB
Camshaft position
sensor connector
Crank angle sensor
connector
TROUBLESHOOTING
DIESEL FUEL
13A-586
2. Connect the oscilloscope special pattern pickup to
camshaft position sensor terminal No. 2.
3. Disconnect the crank angle sensor intermediate
connector and connect the special tool test
harness (MB991709) in between.
4. Connect the oscilloscope special pattern pickup to
crank angle sensor terminal No. 2.
Alternate Method (Test harness not available)
1. Connect the oscilloscope special pattern pickup to
engine-ECU terminal No. 66 (When checking the
camshaft position sensor signal wave pattern.)
2. Connect the oscilloscope special pattern pickup to
engine-ECU terminal No. 67 (When checking the
crank angle sensor signal wave pattern.)
Standard Wave Pattern
Observation conditions
Wave Pattern Observation Points
• Check that cycle time T becomes shorter when
the engine speed increases.
Examples of Abnormal Wave Patterns
•
Example 1
Cause of problem
Sensor interface malfunction
Wave pattern characteristics
Rectangular wave pattern is output even when
the engine is not started.
•
Example 2
Cause of problem
Loose timing belt
Abnormality in sensor disk
Wave pattern characteristics
Function
Special patterns
Pattern height
Low
Pattern selector
Display
Engine speed
Idle
AK501437
0
0
5
5
(V)
Time
Crank angle
sensor output
wave pattern
Camshaft
position
sensor output
wave pattern
Standard Wave Pattern
2 engine revolutions
(1 camshaft revolution)
AB
AK501438
AK501439
TROUBLESHOOTING
DIESEL FUEL
13A-587
Wave pattern is displaced to the left or right.
SUCTION CONTROL VALVE
Measurement Method
1. Disconnect the suction control valve connector,
and then connect the special tool test harness
(MB991658) in between (All terminals should be
connected).
2. Connect the oscilloscope special pattern pickup to
terminal No. 1, of the suction control valve
connector.
Alternate Method (Test harness not available)
1. Connect the oscilloscope special pattern pickup to
engine-ECU terminal No. 131.
Standard Wave Pattern
Observation conditions
Wave Pattern Observation Points
When fuel pressure rises while the engine load is
high, the driving time of the suction control valve
becomes short.
AK900016
1
2
AB
Special
patterns
pickup
Oscilloscope
AK501441
0
5
(V)
Time
Standard Wave Pattern
AB
Function
Special patterns
Pattern height
Variable
Variable knob
Adjust while viewing
the wave pattern
Pattern selector
Display
Engine
Idle
AK501442
Engine load is high
AB
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