Mitsubishi Eclipse. Manual — part 311
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L>
13A-737
SYMPTOM PROCEDURES
INSPECTION PROCEDURE 1: Communication with Scan Tool Is Not Possible. (Comunication with All
Systems Is Not Possible.)
AK103261
15
14
13
12
11
10
1 2 3 4 5 6 7 8
9
16
1
15 16
26 27 28 29
32 33 34
17 18 19 20 21 22 23 24 25
30 31
36 37
35
38
10
11 12 13
1 2 3
4 5 6 7 8 9
14
RED
RED
RED-BLA
C
K
BLA
C
K
BLA
C
K
BLA
C
K
FUSIBLE LINK (1)
Data Link Connector Circuit
C-89
C-113
C-29
DATA LINK
CONNECTOR
38
1
12
16
4
5
JUNCTION
BLOCK
1
6
4 5
11
10
1213
15
17
16
14
19
18
8 9
7
20
2 3
2122 23 2425 26 27 28
C-108
10
15A
AK300113
CONNECTOR: C-29
ACCELERATOR
PEDAL
DATA LINK
CONNECTOR
AB
C-29 (B)
AK300126
CONNECTOR: C-113
AB
C-113 (B)
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L>
13A-738
.
CIRCUIT OPERATION
• A battery positive voltage is applied on the data
link connector power terminal (terminal No. 16).
The ground terminals (terminal No. 4, No. 5) are
grounded to the vehicle body.
.
COMMENT
• The cause is probably a defect in power supply
system (including ground) for the on-board diag-
nostic test mode line.
.
TROUBLESHOOTING HINTS (The most likely
causes for this case: )
• Malfunction of the data link connector.
• Damaged harness wire.
DIAGNOSIS
STEP 1. Measure the power supply voltage at data link
connector C-29.
(1) Measure voltage between terminal No. 16 and ground.
• Voltage should be battery positive voltage.
Q: Is battery positive voltage (approximately 12 volts)
present?
YES : Go to step 2.
NO : Check harness connectors C-108, C-113 and C-89 at
intermediate connector for damage, and repair or
replace as required. Refer to GROUP 00E, Harness
Connector Inspection
. If intermediate
connectors are in good condition, repair harness wire
between fusible link (1) and data link connector C-29
(terminal No. 16) because of open circuit. Then
confirm that the malfunction symptom is eliminated.
AK300123
CONNECTOR: C-108
AB
C-108
AK300118
CONNECTOR: C-89
AC
C-89
AK300450
1 2 3 4 5 6
12
11
10
1516
14
13
9
7 8
CONNECTOR: C-29
AB
C-29 (B)
HARNESS CONNECTOR:
COMPONENT SIDE
AKX01430AS
1 2 3 4 5 6 7 8
9 10 111213141516
C-29 HARNESS
CONNECTOR:
COMPONENT SIDE
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L>
13A-739
STEP 2. Check the continuity at data link connector C-29.
(1) Check for the continuity between terminal No. 4, No. 5 and
ground.
• Should be less than 2 ohms.
Q: Is the continuity normal?
YES : Replace the scan tool. Then confirm that the
malfunction symptom is eliminated.
NO : Repair harness wire between data link connector
C-29 (terminal No. 4, No. 5) and ground because of
open circuit or harness damage. Then confirm that
the malfunction symptom is eliminated.
AK300450
1 2 3 4 5 6
12
11
10
1516
14
13
9
7 8
CONNECTOR: C-29
AB
C-29 (B)
HARNESS CONNECTOR:
COMPONENT SIDE
AKX01431AP
1 2 3 4 5 6 7 8
9 10 111213141516
C-29 HARNESS
CONNECTOR:
COMPONENT SIDE
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L>
13A-740
INSPECTION PROCEDURE 2: Communication with Scan Tool Is Not Possible (Communication with
ECM or PCM Only Is Not Possible)
AK101524
58
60 61
53
52
51
55
54
56
59
62
57
RED-
WHITE
RED-
WHITE
RED-
WHITE
ENGINE CONTROL
MODULE (ECM) <M/T>
OR
POWERTRAIN CONTROL
MODULE (PCM) <A/T>
JOINT
CONNECTOR (1)
DATA LINK
CONNECTOR
C-57 <A/T>
(MU803782)
C-56 <M/T>
(MU803770)
C-28
C-77
C-29
62 <M/T>
85 <A/T>
9
12
15
7
98
78
71
88 89
76 77
72
79
91
73
80
74
75
81
92
8283
93
8485
94
8687
9596
90
97
7 8
5
3 4
35
34
10 11 12
2122 23 24
13 14 15
25 26 27
16
28
17
18 19 20
29
30 31
32 33
36 37
38
9
1 2
6
16
15
18
17
14
20
22
21
9
7
1 2
5
19
3
33
32
30 31
29
28
25
24
23
27
26
6
11
13
4
10
8
12
15
14
13
12
11
10
1 2 3 4 5 6 7 8
9
16
Data Link Connector Circuit
AK300113
CONNECTOR: C-29
ACCELERATOR
PEDAL
DATA LINK
CONNECTOR
AB
C-29 (B)
AK300060
ECM
CONNECTOR: C-56 <M/T>
AF
C-56 (G)
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