Mitsubishi Eclipse. Manual — part 340
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L>
13A-853
INSPECTION PROCEDURE 30: Fuel pump system.
AK103264
1 2 3
4
4 5 6
1 2
GREEN
GREEN-
BLA
CK
GREEN-
BLA
CK
WHITE
WHITE
3
BLA
CK
5
BLA
CK
BLA
CK
IG2
ST
LOCK
ACC
IG1
C-87
11
JUNCTION
BLOCK
R
IGNITION
SWITCH
RELAY BOX
ENGINE CONTROL
MODULE (ECM) <M/T>
OR
POWERTRAIN CONTROL
MODULE (PCM) <A/T>
FUEL
PUMP
RELAY (1)
C-107
FUEL
PUMP
RELAY (2)
C-105
FUEL PUMP
MODULE
12
2
D-17
(MU802058)
1
C-101
14
C-108
11
C-108
M
GREEN
BLA
CK
5
4
C-50 <A/T>
(MU803784)
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
3132 33
34 35
1
10
Fuel Pump Circuit
OFF
1
3
2
6
4
2
OFF
ON
ON
4
3
1
2
BATTERY
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
3 4
1 2
C-105
C-107
3 4
1 2
1
3
2
4 5 6
C-111
MU801331
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
C-89
22 <M/T>
21 <A/T>
C-49 <M/T>
(MU803773)
7
6
5
9
8
10
20
23
4
17
3
16
2
15
1
14
11
24
12
25
13
26
18 19
21 22
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
1
6
4 5
11
10
12 13 14
8 9
7
2 3
C-112
MU801857
1
6
4
5
11
10
12
1314
8 9
7
2 3
15
C-101
24
15A
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L>
13A-854
3
4
1
2
3
4
1
2
3
4
1
2
3
4
1
2
3
4
1
2
3
4
1
2
3
4
1
2
AK300127
CONNECTORS: C-105, 107
FUEL PUMP
RELAY (2)
JUNCTION BLOCK
AB
FUEL PUMP
RELAY (1)
C-105
C-107
AK300120AB
D-17 (GR)
CONNECTOR: D-17
FUEL TEMPERATURE
SENSOR
(INTEGRATED IN
FUEL PUMP MODULE)
AK300060
ECM
CONNECTOR: C-49 <M/T>
AC
C-49 (G)
AK300060AD
C-50 (GR)
PCM
CONNECTOR: C-50 <A/T>
AK300116
CONNECTOR: C-87
AB
C-87
AK300119
CONNECTOR: C-28
AB
C-28
AK300062AB
CONNECTOR: C-101
C-101
AK300123
CONNECTOR: C-108
AB
C-108
AK300124
CONNECTOR: C-111
AB
C-111
AK300125
CONNECTOR: C-112
AB
C-112
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L>
13A-855
.
CIRCUIT OPERATION
• Battery positive voltage is applied to the fuel
pump relay 1 (terminal No. 3) from the ignition
switch-IG.
Ground is provided through terminal No. 2 to
chassis ground.
• When the ignition switch is turned to the "ON"
position, the battery positive voltage is applied to
the fuel pump relay 2 (terminal No. 1) from the
fuel pump relay 1 (terminal No. 1).
• A battery positive voltage is applied on the fuel
pump relay 2 (terminal No. 3) from the ignition
switch-IG.
• During cranking and while the engine is running,
the ECM <M/T> or PCM <A/T> turns the power
transistor in the ECM <M/T> or PCM <A/T> ON
to ground the fuel pump relay 2 coil. With this, the
fuel pump relay turns ON, and the battery positive
voltage is supplied to the fuel pump from the fuel
pump relay 2 (terminal No. 4).
.
TROUBLESHOOTING HINTS (The most likely
causes for this code to be set are: )
• Malfunction of the fuel pump relay.
• Malfunction of the fuel pump.
• Improper connector contact, open or
short-circuited harness wire.
• Malfunction of the ECM <M/T> or PCM <A/T>.
DIAGNOSIS
Required Special Tools:
• MB991958 (MUT-III Sub Assembly)
• MB991824: V.C.I.
• MB991827: USB Cable
• MB991911: Main Harness B
AK300118
CONNECTOR: C-89
AC
C-89
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L>
13A-856
STEP 1. Using scan tool MB991958, check actuator test
item 07: Fuel Pump.
CAUTION
To prevent damage to scan tool MB991958, always turn the
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Set scan tool MB991958 to the actuator test mode for item
07, Fuel Pump.
• An operation sound of the fuel pump should be heard.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the fuel pump operating properly?
YES : That this malfunction is intermittent. Refer to GROUP
00, How to Use Troubleshooting/Inspection Service
Points
NO : Go to Step 2.
STEP 2. Check connector C-107 at fuel pump relay 1 and
connector C-105 at fuel pump relay 2 for damage.
Q: Is the connector in good condition?
YES : Go to Step 3.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection
. Then confirm that the
malfunction symptom is eliminated.
AK300810
AB
MB991911
16-PIN
MB991827
MB991824
3
4
1
2
3
4
1
2
3
4
1
2
3
4
1
2
3
4
1
2
3
4
1
2
3
4
1
2
AK300456
2 1
3
4
2 1
3
4
CONNECTORS: C-105, 107
C-105
C-107
AB
C-107 HARNESS CONNECTOR:
COMPONENT SIDE
C-105 HARNESS CONNECTOR:
COMPONENT SIDE
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