Mitsubishi Eclipse. Manual — part 343
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L>
13A-865
STEP 14. Check the power supply voltage at ECM
connector C-49 <M/T> or PCM connector C-50 <A/T>.
(1) Disconnect the connector C-49 <M/T> or C-50 <A/T> and
measure at the harness side.
(2) Turn the ignition switch to the "ON" position.
AK300413
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
CONNECTOR: C-49 <M/T>
C-49 (G)
AB
HARNESS CONNECTOR:
COMPONENT SIDE
AK300414
2
3
4
5
6
7
8
9
11
12
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15
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19
20
30
21
22
23
24
25
26
27
28
29
31
32
33
34
35
1
10
C-50 (GR)
CONNECTOR: C-50 <A/T>
AB
HARNESS CONNECTOR:
COMPONENT SIDE
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L>
13A-866
(3) Measure the voltage between terminal No. 22 <M/T> or No.
21 <A/T> and ground.
• Voltage should be battery positive voltage.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the voltage normal?
YES : Replace the ECM or PCM. Then confirm that the
malfunction symptom is eliminated.
NO : Check harness connector C-28 and C-108 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 fuel pump relay 2 connector C-105 (terminal
No. 2) and ECM connector C-49 (terminal No. 22)
<M/T> or PCM connector C-50 (terminal No. 21)
<A/T> because of open circuit. Then confirm that the
malfunction symptom is eliminated.
AK000408AJ
1
2
3
4
5
6
7
8
9
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12
13
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15
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17
18
19
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21
22
23
24
25
26
<M/T>
C-49 HARNESS
CONNECTOR:
COMPONENT SIDE
AK000409
AK000409 AS
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
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17
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19
20
21
22
23
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26
27
28
29
30
31
32
33
34
35
<A/T>
C-50 HARNESS
CONNECTOR:
COMPONENT SIDE
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L>
13A-867
INSPECTION PROCEDURE 31: Ignition Switch-ST System. <M/T>
AK101528
4 5 6
1 2 3
BL
ACK
-
RED
BL
ACK
-
RED
BL
ACK
-
RED
8
7
2
6
3
5
1
BL
ACK
-RED
4
BL
ACK
GREEN-
BL
ACK
GREEN-
BL
ACK
BL
ACK
-
RED
LOCK
ACC
C-87
Ignition Switch-ST Circuit
R
IGNITION
SWITCH
IG2
IG1
ST
16
5
5
2
3
1
STARTER
RELAY
71
2
2
INTERLOCK
SWITCH
C-02
1
OFF
ON
ENGINE
CONTROL
MODULE (ECM)
C-07
C-28
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
C-60
(MU803772)
82
78
81
80
89 90 91 92
79
87
71
74
73
72
76
75
77
85
88
83 84
86
1 2
A-13X
3
4
5
1 2
BL
ACK
-RED
TO STARTING
SYSTEM
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L>
13A-868
.
CIRCUIT OPERATION
• The battery positive voltage is supplied to the
ECM (terminal No. 71) via the starter relay during
engine cranking. With this, the ECM detects that
the engine is being cranked.
.
TROUBLESHOOTING HINTS (The most likely
causes for this case: )
• Malfunction of the ignition switch.
• Malfunction of the starter relay.
• Improper connector contact, open circuit or
short-circuited harness wire.
• Malfunction of the ECM.
AK300122
STARTER RELAY
CONNECTOR: A-13X
AB
A-13X
AK300119
CONNECTOR: C-28
AB
C-28
AK300060
ECM
CONNECTOR: C-60 <M/T>
AE
C-60 (G)
AK300092
CONNECTOR: C-07
AB
C-07
AK300116
CONNECTOR: C-87
AB
C-87
AK300743
CONNECTOR: C-02
AB
C-02
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