Mitsubishi Eclipse. Manual — part 339
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L>
13A-849
STEP 8. Measure the power supply voltage at ECM harness
side connector C-53 <M/T> or PCM harness side connector
C-54 <A/T>.
(1) Disconnect the connector C-53 <M/T> or C-54 <A/T> and
measure at the harness side.
AK300417
34 33 32
36 35
37
42
45
31
39
38
46
40
41
43
44
CONNECTOR: C-53 <M/T>
C-53 (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-850
(2) Measure the voltage between terminal No. 38 <M/T> or No.
49 <A/T> and ground.
• Voltage should be battery positive voltage.
Q: Is battery positive voltage (approximately 12 volts)
present?
YES : Go to Step 9.
NO : Repair harness wire between MFI relay connector
A-18X (terminal No. 3) and ECM connector C-53
(terminal No. 38) <M/T> or PCM connector C-54
(terminal No. 49) <A/T> because of open circuit. Then
confirm that the malfunction symptom is eliminated.
AK000405
<M/T>
C-53 HARNESS
CONNECTOR:
COMPONENT SIDE
AI
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
AK000406AL
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
<A/T>
C-54 HARNESS
CONNECTOR:
COMPONENT SIDE
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L>
13A-851
STEP 9. Measure the power supply voltage at ECM harness
side connector C-49, C-53 <M/T> or PCM harness side
connector C-54 <A/T>.
(1) Disconnect the connector C-49, C-53 <M/T> or C-54 <A/T>
and measure at the harness side.
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
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-852
(2) Using a jumper wire, connect terminal No. 38 <M/T> or No.
49 <A/T> to ground.
(3) Measure the voltage between terminal (No. 12, No. 25)
<M/T> or (No. 41, No. 47) <A/T> and ground.
• Voltage should be battery positive voltage.
Q: Is battery positive voltage (approximately 12 volts)
present?
YES : Replace the ECM or PCM. Then confirm that the
malfunction symptom is eliminated.
NO : Repair harness wire between MFI relay connector
A-18X (terminal No. 4) and ECM connector C-49
(terminal No. 12, No. 25) <M/T> or PCM connector
C-54 (terminal No. 41, No. 47) <A/T> because of
open circuit. Then confirm that the malfunction
symptom is eliminated.
AK000407
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
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
<M/T>
HARNESS CONNECTOR:
COMPONENT SIDE
C-49
C-53
AH
AKX01438
<A/T>
C-54 HARNESS
CONNECTOR:
COMPONENT SIDE
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
AR
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