Mitsubishi Eclipse / Eclipse Spyder (2000-2002). Service and repair manual — part 334
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>
13B-535
TERMINAL RESISTANCE AND CONTINUITY CHECK
92
91
Manifold
differential
pressure sensor
Engine: idling
0.8
−
2.4 V
•
Engine: idling
•
Suddenly depress the accelerator pedal
Rises from 0.8
−
2.4 V suddenly
93
92
Fuel tank
differential
pressure sensor
Engine: idling
1.2
−
3.8 V
99
98
Ignition switch-IG
Ignition switch: "ON"
B+
TERMINAL
NO. <M/T>
TERMINAL
NO. <A/T>
INSPECTION ITEM
INSPECTION CONDITION (ENGINE CONDITION)
NORMAL
CONDITION
AK000059
ECM <M/T> or PCM <A/T> Connector Terminal Arrangement
<M/T>
<A/T>
AB
78
91
71
59
68
47
58
67
56
66
55 54
65
53
64
52
63
46
51
62
44
49
61
42
48
60
41
23
35
8
22 21
34
7
20
33
6
19
32
18
31
17 16
30
15
29
14
28
5
13
27
4
12 11
26
3
10
25
2
9
24
1
23
35
8
47
58
41
48
59
50
60
51
61
52
62
53
54
63
42
55
64
44
56
65
45
57
66
46
78
90
71
79
91
72
81
92
82
93
83
84
94
85
95
86
96
74
88
97
76
89
98
77
108
121
101
109
122
110
123
102
112
124
113
114
125
115
126
116
127
117
128
104
119
129
106
120
130
107
118
105
111
103
87
75
80
73
49
43
22 21
34
7
20
33
6
19
32
18
31
17 16
30
15
29
14
28
5
13
27
4
12 11
26
3
10
25
2
9
24
1
50
43
57
45
79
92
80
93
83
84
95
86
97
87
98
89
99
72
82
94
74
85
96
76
90
100
77
88
75
81
73
TERMINAL
NO.
TERMINAL
NO.
INSPECTION ITEM
NORMAL CONDITION (INSPECTION
CONDITION)
1
−
47
1
−
41
No.1 injector
13
−
16
Ω
[at 20
°
C (68
°
F)]
9
−
47
9
−
41
No.2 injector
24
−
47
24
−
41
No.3 injector
2
−
47
2
−
41
No.4 injector
10
−
47
10
−
41
No.5 injector
25
−
47
25
−
41
No.6 injector
3
−
47
3
−
41
Left bank heated oxygen sensor heater
(front)
4.5
−
8.0
Ω
[at 20
°
C (68
°
F)]
4
−
47
4
−
41
Right bank heated oxygen sensor
heater (front)
4.5
−
8.0
Ω
[at 20
°
C (68
°
F)]
6
−
47
6
−
41
EGR solenoid
29
−
35
Ω
[at 20
°
C (68
°
F)]
14
−
47
14
−
41
Stepper motor coil (A1)
28
−
33
Ω
[at 20
°
C (68
°
F)]
28
−
47
28
−
41
Stepper motor coil (A2)
15
−
47
15
−
41
Stepper motor coil (B1)
29
−
47
29
−
41
Stepper motor coil (B2)
26
−
47
26
−
41
Left bank heated oxygen sensor heater
(rear)
11
−
18
Ω
[at 20
°
C (68
°
F)]
27
−
47
27
−
41
Right bank heated oxygen sensor
heater (rear)
11
−
18
Ω
[at 20
°
C (68
°
F)]
16
−
47
34
−
41
Evaporative emission purge solenoid
30
−
34
Ω
[at 20
°
C (68
°
F)]
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>
13B-536
INSPECTION PROCEDURE USING AN
OSCILLOSCOPE
M1131009300069
VOLUME AIR FLOW SENSOR
Required Special Tool:
MB991709: Test Harness
Measurement Method
1. Disconnect the volume air flow sensor connector, and
connect the test harness special tool (MB991709) in
between. (All terminals should be connected.)
2. Connect the oscilloscope probe to volume air flow sensor
connector terminal 3.
Alternate method (Test harness not available)
<M/T>
1. Connect the oscilloscope probe to ECM terminal 61.
<A/T>
1. Connect the oscilloscope probe to PCM terminal 65.
35
−
47
35
−
41
Evaporative emission ventilation
solenoid
17
−
21
Ω
[at 20
°
C (68
°
F)]
46
−
Body
ground
42
−
Body
ground
ECM or PCM ground
Continuity (0
Ω
)
58
−
Body
ground
48
−
Body
ground
ECM or PCM ground
44
−
4944
−
57
Engine coolant temperature sensor
5.1
−
6.5 k
Ω
[when engine coolant
temperature is 0
°
C (32
°
F)]
2.1
−
2.7 k
Ω
[when engine coolant
temperature is 20
°
C (68
°
F)]
0.9
−
1.3 k
Ω
[when engine coolant
temperature is 40
°
C (104
°
F)]
0.26
−
0.36 k
Ω
[when engine coolant
temperature is 80
°
C (176
°
F)]
62
−
4964
−
57
Intake air temperature sensor
5.3
−
6.7 k
Ω
[when intake air
temperature is 0
°
C (32
°
F)]
2.3
−
3.0 k
Ω
[when intake air
temperature is 20
°
C (68
°
F)]
1.0
−
1.5 k
Ω
[when intake air
temperature is 40
°
C (104
°
F)]
0.30
−
0.42 k
Ω
[when intake air
temperature is 80
°
C (176
°
F)]
TERMINAL
NO.
TERMINAL
NO.
INSPECTION ITEM
NORMAL CONDITION (INSPECTION
CONDITION)
AKX01594
OSCILLOSCOPE
OSCILLOSCOPE
PLOBE
4 5 6
1 2 3
7
AKX01594AB
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>
13B-537
Standard Wave Pattern
Wave Pattern Observation Points
1. Check that cycle time T becomes shorter and the frequency
increases when the engine speed is increased.
Observation conditions
Function
Special pattern
Pattern height
Low
Pattern selector
Display
Engine r/min
Idle speed
Observation conditions
Rev engine, observe T1 and T2 remain equal.
AKX01595
THE TIME (CYCLE TIME) T IS REDUCED WHEN THE
AMOUNT OF INTAKE AIR INCREASES.
TIMES T
1
AND T
2
ARE EQUAL
T
T
1
T
2
10
0
(V)
TIME
AB
Standard wave pattern
AKX01596
10
0
(V)
T
TIME
AB
Standard wave pattern
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>
13B-538
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
Damaged rectifier or vortex generation column.
•
Wave pattern characteristics
Unstable wave pattern with non-uniform frequency. An
ignition leak will distort the wave pattern temporarily, even if
the volume air flow sensor is normal.
CAMSHAFT POSITION SENSOR AND
CRANKSHAFT POSITION SENSOR
Required Special Tools:
MB991348: Test Harness
MD998478: Test Harness
Measurement Method
1. Disconnect the camshaft position sensor connector, and
connect the test harness special tool (MB991348) in
between. (All terminals should be connected.)
2. Connect the oscilloscope probe to camshaft position sensor
connector terminal 5.
3. Disconnect the crankshaft position sensor connector, and
connect the test harness special tool (MD998478) in
between.
4. Connect the oscilloscope probe to crankshaft position
sensor connector terminal 2 (black clip of special tool).
Alternate method (Test harness not available)
<M/T>
1. Connect the oscilloscope probe to ECM terminal 50. (Check
the camshaft position sensor signal wave pattern.)
2. Connect the oscilloscope probe to ECM terminal 43. (Check
the crankshaft position sensor signal wave pattern.)
<A/T>
1. Connect the oscilloscope probe to PCM terminal 56. (Check
the camshaft position sensor signal wave pattern.)
2. Connect the oscilloscope probe to PCM terminal 45. (Check
the crankshaft position sensor signal wave pattern.)
AKX01597
AK000061
1 2 3 4 5 6 7
OSCILLOSCOPE
CAMSHAFT POSITION
SENSOR CONNECTOR
OSCILLO-
SCOPE
PROBE
AB
AKX01500
CRANKSHAFT POSITION
SENSOR CONNECTOR
OSCILLOSCOPE
1 2
3
AB
OSCILLO-
SCOPE
PROBE
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