Mitsubishi Outlander GS45X. Manual — part 741
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>
13A-787
STEP 22. Check for harness damage between MFI relay
connector A-33X (terminal No. 2) and ECM connector B-11
(terminal No. 82).
Q: Is the harness wire in good condition?
YES : Replace the ECM. When the ECM is replaced,
register the ID code. Refer to GROUP 42B, Diagnosis
− ID Code Registration Judgment Table <Vehicles
with KOS>
P.42B-15
or GROUP 42C, Diagnosis
− ID
Codes Registration Judgment Table <Vehicles with
WCM>
P.42C-10
. Then confirm that the malfunction
symptom is eliminated.
NO : Repair it. Then confirm that the malfunction symptom
is eliminated.
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>
13A-788
Inspection procedure 23: Fuel pump system
1
3
2
4
71 72 73 74 75 76 77 78 79 80 81 82
83 84 85 86 87 88 89 90 91 92 93 94
95 96 97 98 99
100 101 102 103 104
112 113 114
109
108
107
110 111
115 116
106
105
118
117
AK604016
1 2 3
4 5 6
1
2 3
4
5
1 2 3 4
5 6 7
15
14
13
12
11
10
9
8
1 2
1 2
1 2 3 4
5 6 7
12
11
10
15 16
14
13
9
8
M
R
IG2
ST
LOCK
IG1
2
TO ECM
5
4
BLUE
1
C-314
MU801323
C-307
MU801325
C-317
PINK
FUEL PUMP
MODULE
D-20
(MU802058)
FUEL PUMP RELAY
ETACS-ECU
B-11
11
96
C-304
BLA
CK
15A
A-33X
4
3
1
2
23
OFF
ON
OFF
ON
FUEL PUMP CIRCUIT
WHITE
IGNITION SWITCH
C-210
AC
WHITE
FUSIBLE LINK
WHITE
GREEN
36
1
6
ACC
MFI
RELAY
RELAY BOX
(ENGINE COMPARTMENT)
ENGINE
CONTROL
MODULE
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>
13A-789
.
CIRCUIT OPERATION
• The fuel pump drive power is supplied from MFI
relay (terminal No. 2) to fuel pump relay (C-307
ETACS-ECU connector terminal No. 1) in the
ETACS-ECU.
• The battery positive voltage is applied by the igni-
tion switch to the fuel pump coil (C-317
ETACS-ECU connector terminal No. 6) in the
ETACS-ECU. The ECM turns "ON" the relay by
turning "ON" the power transistor in the unit so as
to conduct power to the fuel pump relay coil (via
the C-304 ETACS-ECU connector terminal No.
11).
• When the fuel pump relay is turned "ON", the bat-
tery positive voltage will be supplied from the fuel
pump relay (C-314 ETACS-ECU connector termi-
nal No. 5) to the fuel pump.
.
COMMENT
• When the ignition switch ON signal is inputted
into the ECM, the ECM turns ON the fuel pump
relay. This causes the battery voltage to be sup-
plied to the fuel pump.
.
TROUBLESHOOTING HINTS (The most
likely causes for this code to be set are:)
• Malfunction of the fuel pump relay.
• Malfunction of the fuel pump.
• Open or shorted fuel pump circuit, harness dam-
age, or connector damage.
• Malfunction of the ECM.
AK704088
MFI relay
AB
Connector: A-33X
A-33X
AK704097AB
Connector: B-11
B-11 (GR)
AK900601
Connector: C-210
C-210
AB
AK700444AB
ETACS-ECU
C-317
Connectors: C-304, C-307, 314 and C-317
C-304
C-307 (B)
C-314
AK700446
AB
Fuel pump module
D-20 (GR)
Connector: D-20
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>
13A-790
DIAGNOSIS
Required Special Tools:
• MB991958: Scan Tool (M.U.T.-III Sub Assembly)
• MB991824: V.C.I.
• MB991827: USB Cable
• MB991910: Main Harness A
STEP 1. Using scan tool MB991958, check actuator test
item 9: 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
9, 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
− How to Cope with Intermittent Malfunctions
P.00-15
.
NO : Go to Step 2.
STEP 2. Check harness connector C-304, C-307, C-314 and
C-317 at ETACS-ECU for damage.
Q: Is the harness connector in good condition?
YES : Go to Step 3.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection
P.00E-2
. Then confirm that the
malfunction symptom is eliminated.
AK700568AB
MB991824
MB991827
MB991910
Data link
connector
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