Mitsubishi Lancer Evolution X. Manual — part 426
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-769
STEP 19. Measure the power supply voltage at ECM
harness side connector B-10.
(1) Disconnect the connector B-10 and measure at the harness
side.
(2) Using a jumper wire, connect terminal No. 73 to ground.
(3) Measure the voltage between terminal No. 82 and ground.
• Voltage should be battery positive voltage.
Q: Is battery positive voltage (approximately 12 volts)
present?
YES : Go to Step 22.
NO : Go to Step 20.
STEP 20. Check for open circuit and short circuit to
ground between MFI relay connector A-34X (terminal No.
2) and ECM connector B-10 (terminal No. 73).
Q: Is the harness wire in good condition?
YES : Go to Step 21.
NO : Repair it. Then confirm that the malfunction symptom
is eliminated.
STEP 21. Check for harness damage between fusible link
(36) and MFI relay connector A-34X (terminal No. 3, No. 4).
Q: Is the harness wire in good condition?
YES : Repair harness wire between MFI relay connector
A-34X (terminal No. 1) and ECM connector (terminal
No. 73) because of harness damage. Then confirm
that the malfunction symptom is eliminated.
NO : Repair it. Then confirm that the malfunction symptom
is eliminated.
82 81 80 79 78 77 76 75 74 73 72 71
94 93 92 91 90 89 88 87 86 85 84 83
99 98 97 96 95
100
101
102
103
104
105
106
112
113
114
109 108
107
110
111
115
116
117
118
AK704309 AC
B-10 harness
connector:
component side
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-770
STEP 22. Check for harness damage between MFI relay
connector A-34X (terminal No. 2) and ECM connector B-10
(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
or GROUP 42C, Diagnosis − ID
Codes Registration Judgment Table <Vehicles with
WCM>
. 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)
13A-771
Inspection procedure 23: Fuel pump system
AK704354
1 2
M
1
3
2
4
1
2 3
4
5
1 2
1 2 3
4 5 6
1 2 3 4
5 6 7
15
14
13
12
11
10
9
8
2
1
1
2
3
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
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 27 28 29 30 31 32
33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48
49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64
1 2 3 4
5 6 7
12
11
10
15 16
14
13
9
8
2
8
7
6
5
4
3
11
21
20
19
18
17
16
15
14
13
12
9
22
1
10
IG2
ST
LOCK
ACC
IG1
2
TO ECM
5
4
51
BLUE
A-27X
1
C-314
MU801323
A-58
MU802601
C-307
MU801325
C-317
PINK
FUEL PUMP
MODULE
D-22
(MU802058)
FUEL PUMP RELAY 2
FUEL PUMP
RELAY 1
FUEL PUMP
CIRCUIT RESISTOR
ETACS-ECU
B-10
C-304
B-09
A-13
11
96
BLA
CK
20A
A-34X
4
2
3
1
23
OFF
ON
OFF
ON
OFF
ON
FUEL PUMP CIRCUIT
WHITE
IGNITION SWITCH
C-210
AC
WHITE
FUSIBLE LINK
WHITE
BLUE
BLUE
GREEN
GREEN
RED-BLA
CK
RED-BLA
CK
RED-WHITE
RED-
WHITE
36
2
4
1
18
3
1
1
2
6
MFI
RELAY
RELAY BOX
(ENGINE COMPARTMENT)
ENGINE CONTROL MODULE
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-772
.
CIRCUIT OPERATION
• The power supply is supplied from the MFI relay
(terminal No. 2) to the fuel pump relay 1 (terminal
No. 4) and the fuel pump circuit resistor (terminal
No. 1).
• The battery positive voltage is applied to the fuel
pump relay 1 (terminal No. 2) from the MFI relay
(terminal No. 2).
• The battery positive voltage is applied from the
ignition switch to the fuel pump relay 2 (C-317
ETACS-ECU connector terminal No. 6).
• The ECM (terminal No. 96) turns ON the power
transistor of the unit during the engine cranking
and running. The current is going through the fuel
pump relay 2 (C-304 ETACS-ECU connector ter-
minal No. 11), and then the relay is turned ON.
AK704229AB
Connector: A-13
A-13
AK704355 AB
Connectors: A-27X, A-34X
A-27X
MFI relay
Fuel pump relay 1
A-34X
AK704356AB
Connector: A-58
A-58 (B)
Fuel pump
circuit resistor
AK704295AB
B-10 (GR)
B-09 (GR)
ECM
Connectors: B-09, B-10
AK704352AB
Connector: C-210
C-210
AK704357AB
Connectors: C-304, C-307, C-314 and C-317
ETACS-ECU
C-304
C-307 (B)
C-314
C-317
AK704253 AB
Fuel pump module (incorporating
fuel level sensor (main) and
fuel tank temperature sensor)
Connector: D-22
D-22 (GR)
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст