Mitsubishi Montero (2004+). Manual — part 371
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-971
98
Engine coolant
temperature
sensor
Ignition switch:
"ON"
When engine coolant
temperature is -20
°C (-4°F)
3.9
− 4.5 V
When engine coolant
temperature is 0
°C (32°F)
3.2
− 3.8 V
When engine coolant
temperature is 20
°C (68°F)
2.3
− 2.9 V
When engine coolant
temperature is 40
°C (104°F)
1.3
− 1.9 V
When engine coolant
temperature is 60
°C (140°F)
0.7
− 1.3 V
When engine coolant
temperature is 80
°C (176°F)
0.3
− 0.9 V
99
Intake air
temperature
sensor
Ignition switch:
"ON"
When Intake air temperature
is -20
°C (-4°F)
3.8
− 4.4 V
When Intake air temperature
is 0
°C (32°F)
3.2
− 3.8 V
When Intake air temperature
is 20
°C (68°F)
2.3
− 2.9 V
When Intake air temperature
is 40
°C (104°F)
1.5
− 2.1 V
When Intake air temperature
is 60
°C (140°F)
0.8
− 1.4 V
When Intake air temperature
is 80
°C (176°F)
0.4
− 1.0 V
100
Barometric
pressure sensor
Ignition switch:
"ON"
When altitude is 0 m (0 ft)
3.7
− 4.3 V
When altitude is 600 m
(1,969 ft)
3.4
− 4.0 V
When altitude is 1,200 m
(3,937 ft)
3.2
− 3.8 V
When altitude is 1,800 m
(5,906 ft)
2.9
− 3.5 V
101
Manifold absolute
pressure sensor
Engine: idling
0.8
− 2.4 V
• Engine: idling
• Revving (momentary wide open throttle)
Rises from 0.8
−
2.4 V suddenly
106
Power supply
voltage applied to
throttle position
sensor
Ignition switch: ON
4.5
− 5.5 V
107
Accelerator pedal
position sensor
(sub)
Ignition switch: ON Release the accelerator
pedal
0.905
− 1.165 V
Depress the accelerator
pedal fully
4.035 V or more
108
Left bank heated
oxygen sensor
(front)
Engine: warming up, 2,500 r/min (check using a
digital voltmeter)
0
⇔ 0.8 V
(changes
repeatedly)
TERMINAL NO. INSPECTION
ITEM
INSPECTION CONDITION (ENGINE
CONDITION)
NORMAL
CONDITION
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-972
109
Right bank heated
oxygen sensor
(front)
Engine: warming up, 2,500 r/min (check using a
digital voltmeter)
0
⇔ 0.8 V
(changes
repeatedly)
113
Throttle position
sensor (sub)
• Remove the
intake air hose
at the throttle
body
• Disconnect the
throttle position
sensor, and
then connect
terminal
numbers No. 1,
No. 2, No. 3 and
No. 4 with the
use of the
special tool:
MB991348.
• Ignition switch:
ON
Fully close the throttle valve
with your finger
2.2
− 2.8 V
Fully open the throttle valve
with your finger
3.8
− 4.9 V
114
Accelerator pedal
position sensor
(main)
Ignition switch: ON Release the accelerator
pedal
0.905
− 1.165 V
Depress the accelerator
pedal fully
4.035 V or more
115
Throttle position
sensor (main)
• Remove the
intake air hose
at the throttle
body
• Disconnect the
throttle position
sensor, and
then connect
terminal
numbers No. 1,
No. 2, No. 3 and
No. 4 with the
use of the
special tool:
MB991348.
• Ignition switch:
ON
Fully close the throttle valve
with your finger
0.2
− 0.8 V
Fully open the throttle valve
with your finger
3.8
− 4.9 V
116
Left bank heated
oxygen sensor
(rear)
• Engine: warming up
• Revving
0 and 0.6
− 1.0 V
alternates
117
Right bank heated
oxygen sensor
(rear)
• Engine: warming up
• Revving
0 and 0.6
− 1.0 V
alternates
TERMINAL NO. INSPECTION
ITEM
INSPECTION CONDITION (ENGINE
CONDITION)
NORMAL
CONDITION
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-973
TERMINAL RESISTANCE AND CONTINUITY CHECK
132
Power supply
voltage applied to
throttle actuator
control motor
Ignition switch: ON
B+
133
Throttle actuator
control motor (+)
• Ignition switch: ON
• Accelerator pedal: fully opened → fully closed
Decreases
slightly (approx.
2 V) from battery
voltage.
141
Throttle actuator
control motor (
−)
• Ignition switch: ON
• Accelerator pedal: fully closed → fully opened
Decreases
slightly (approx.
2 V) from battery
voltage.
TERMINAL NO. INSPECTION
ITEM
INSPECTION CONDITION (ENGINE
CONDITION)
NORMAL
CONDITION
AK201355
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
52
53
54
55
56
57
58
50
51
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
61
62
63
64
65
66
67
68
69
70
71
76
77
78
79
85
86
87
80
72
73
74
75
81
82
83
84
88
89
2
3
4
5
6
7
8
9
1
10
14
15
16
17
18
19
20
21
22
23
24
25
26
27
11
12
13
PCM Harness Side Connector Terminal Arrangement
AB
TERMINAL
NO.
INSPECTION ITEM
NORMAL CONDITION (INSPECTION
CONDITION)
1
− 34
No. 1 injector
13
− 16 Ω [at 20°C (68°F)]
5
− 34
No. 2 injector
14
− 34
No. 3 injector
21
− 34
No. 4 injector
2
− 34
No. 5 injector
6
− 34
No. 6 injector
10
− 34
Left bank heated oxygen sensor heater
(front)
4.5
− 8.0 Ω [at 20°C (68°F)]
25
− 34
Right bank heated oxygen sensor heater
(front)
4.5
− 8.0 Ω [at 20°C (68°F)]
4
− 34
Intake manifold tuning solenoid
29
− 35 Ω [at 20°C (68°F)]
3
− 34
Stepper motor coil (A1)
20
− 24 Ω [at 20°C (68°F)]
12
− 34
Stepper motor coil (A2)
19
− 34
Stepper motor coil (B1)
26
− 34
Stepper motor coil (B2)
18
− 34
Left bank heated oxygen sensor heater
(rear)
11
− 18 Ω [at 20°C (68°F)]
24
− 34
Right bank heated oxygen sensor heater
(rear)
11
− 18 Ω [at 20°C (68°F)]
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-974
23
− 34
Evaporative emission purge solenoid
30
− 34 Ω [at 20°C (68°F)]
11
− 34
Evaporative emission ventilation solenoid
17
− 21 Ω [at 20°C (68°F)]
33
− Body
ground
PCM ground
Continuity (2
Ω or less)
42
− Body
ground
PCM ground
144
− Body
ground
PCM ground
145
− Body
ground
PCM ground
98
− 96
Engine coolant temperature sensor
14
− 17 kΩ [when engine coolant temperature
is
−20°C (−4°F)]
5.1
− 6.5 kΩ [when engine coolant temperature
is 0
°C (32°F)]
2.1
− 2.7 kΩ [when engine coolant temperature
is 20
°C (68°F)]
0.9
− 1.3 kΩ [when engine coolant temperature
is 40
°C (104°F)]
0.48
− 0.68 kΩ [when engine coolant
temperature is 60
°C (140°F)]
0.26
− 0.36 kΩ [when engine coolant
temperature is 80
°C (176°F)]
99
− 88
Intake air temperature sensor
13
− 17 kΩ [when intake air temperature is
−20°C (−4°F)]
5.3
− 6.7 kΩ [when intake air temperature is
0
°C (32°F)]
2.3
− 3.0 kΩ [when intake air temperature is
20
°C (68°F)]
1.0
− 1.5 kΩ [when intake air temperature is
40
°C (104°F)]
0.56
− 0.76 kΩ [when intake air temperature is
60
°C (140°F)]
0.30
− 0.42 kΩ [when intake air temperature is
80
°C (176°F)]
133
− 141
Throttle actuator control motor
0.3
− 100 Ω [at 20°C (68°F)]
TERMINAL
NO.
INSPECTION ITEM
NORMAL CONDITION (INSPECTION
CONDITION)
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