Mitsubishi Eclipse. Manual — part 348
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L>
13A-885
STEP 9. Check connector A-12X at engine speed detection
and connector C-56 at ECM <M/T> or connector C-54 at
PCM <A/T> for damage.
Q: Is the connector in good condition?
YES : Go to Step 10.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection
. Then confirm that the
malfunction symptom is eliminated.
AK300747
1
CONNECTOR: A-12X
AB
A-12X
HARNESS CONNECTOR:
COMPONENT SIDE
AK300416
58
60
61
53 52 51
55 54
56
59
62
57
CONNECTOR: C-56 <M/T>
C-56 (G)
AB
HARNESS CONNECTOR:
COMPONENT SIDE
AK300412
42
43
48
49
50
51
52
53
54
55
56
57
46 45 44
58
59
60
61
62
63
64
65
66
47
41
C-54 (GR)
CONNECTOR: C-54 <A/T>
AB
HARNESS CONNECTOR:
COMPONENT SIDE
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L>
13A-886
STEP 10. Check for open circuit and short circuit to
ground and harness damage between engine speed
detection connector A-12X and ECM connector C-56
(terminal No. 58) <M/T> or PCM connector C-54 (terminal
No. 43) <A/T>
Q: Is the harness wire in good condition?
YES : Replace the ECM or PCM. Then confirm that the
malfunction symptom is eliminated.
NO : Repair it. Then confirm that the malfunction symptom
is eliminated.
AK300747
1
CONNECTOR: A-12X
AB
A-12X
HARNESS CONNECTOR:
COMPONENT SIDE
AK300416
58
60
61
53 52 51
55 54
56
59
62
57
CONNECTOR: C-56 <M/T>
C-56 (G)
AB
HARNESS CONNECTOR:
COMPONENT SIDE
AK300412
42
43
48
49
50
51
52
53
54
55
56
57
46 45 44
58
59
60
61
62
63
64
65
66
47
41
C-54 (GR)
CONNECTOR: C-54 <A/T>
AB
HARNESS CONNECTOR:
COMPONENT SIDE
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L>
13A-887
INSPECTION PROCEDURE 34: A/C system.
.
COMMENT
• When the A/C is "ON", the battery positive volt-
age is applied on the ECM (terminals No. 45)
<M/T> PCM (terminals No. 83) <A/T> from the
automatic compressor controller.
When battery positive voltage is applied to the
ECM <M/T> or PCM <A/T>, the ECM <M/T> or
PCM <A/T> turns "ON" the power transistor in the
ECM <M/T> or PCM <A/T>. The ECM <M/T> or
PCM <A/T> delays A/C engagement momentarily
while it increases idle rpm. Then the A/C com-
pressor clutch relay coil will be energized.
With this, the A/C compressor clutch relay turns
"ON", and the A/C compressor clutch functions.
.
TROUBLESHOOTING HINTS (The most likely
causes for this case: )
• Malfunction of the A/C control system.
• Malfunction of the A/C switch.
• Improper connector contact, open circuit or
short-circuited harness wire.
• Malfunction of the ECM <M/T> or PCM <A/T>.
AK000684
GREEN-
RED
GREEN
ENGINE CONTROL
MODULE (ECM) <M/T>
OR
POWERTRAIN CONTROL
MODULE (PCM) <A/T>
45 <M/T>*2
83 <A/T>*4
8 <M/T>*1
20 <A/T>*3
C-49 <M/T>
(MU803773)
C-53 <M/T>
(MU803771)
C-50 <A/T>
(MU803784)
C-57 <A/T>
(MU803782)
A/C COMPRESSOR
RELAY
NOTE
*1:ECM connector C-49 <M/T>
*2:ECM connector C-53 <M/T>
*3:PCM connector C-50 <A/T>
*4:PCM connector C-57 <A/T>
AUTOMATIC
COMPRESSOR
CONTROLLER
6
17
8
15
9
18
7
20
16
2
10
13
12
23 24 25 26
11
21
3
1
14
4
19
5
22
12
11
16
5 6
7 8
21
13
27
14
28
15
29
17
30
18
31
19
32
20
33
22
34
23
35
1
24
3
26
9
2
25
10
4
34
33
32
36
35
37
42
45
31
39
38
46
40 41
43 44
98
78
71
88 89
76 77
72
79
91
73
80
74
75
81
92
8283
93
8485
94
8687
9596
90
97
A/C Circuit
AK300060
ECM
CONNECTORS: C-49, C-53 <M/T>
AK
C-53 (G)
C-49 (G)
AK300060
PCM
CONNECTORS: C-50, C-57 <A/T>
AL
C-57 (GR)
C-50 (GR)
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L>
13A-888
DIAGNOSIS
STEP 1. Check connector C-49, C-53 at ECM <M/T> or
connector C-50, C-57 at PCM <A/T> for damage.
Q: Is the connector in good condition?
YES : Go to Step 2.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection
. Then confirm that the
malfunction symptom is eliminated.
AK300419
1
14
4
19
5
22
6
17
8
15
9
18
7
20
16
2
21
23
26
24
25
3
10
11
12
13
34 33 32
36 35
37
42
45
31
39
38
46
40
41
43
44
CONNECTORS: C-49, C-53 <M/T>
C-53 (G)
C-49 (G)
AB
C-53 HARNESS CONNECTOR:
COMPONENT SIDE
C-49 HARNESS CONNECTOR:
COMPONENT SIDE
AK300420
2
3
4
5
6
7
8
9
11
12
13
14
15
16
17
18
19
20
30
21
22
23
24
25
26
27
28
29
31
32
33
34
35
1
10
98
78
71
88
89
76
77
72
79
91
73
80
74
75
81
92
82
83
93
84
85
94
86
87
95
96
90
97
CONNECTORS: C-50, C-57 <A/T>
C-57 (GR)
C-50 (GR)
AB
C-57 HARNESS CONNECTOR:
COMPONENT SIDE
C-50 HARNESS CONNECTOR:
COMPONENT SIDE
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