Mitsubishi Eclipse / Eclipse Spyder (2000-2002). Service and repair manual — part 178
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>
13A-411
•
The ECM (terminal 13, 26) <M/T> or PCM
(terminals 42, 48) <A/T> is grounded to the
vehicle body.
TROUBLESHOOTING HINTS (The most likely
causes for this code to be set are:)
•
Malfunction of the ignition switch.
•
Malfunction of the MFI relay.
•
Improper connector contact, open circuit or short-
circuited harness wire.
•
Disconnected ECM <M/T> or PCM <A/T> ground
wire.
•
Malfunction of the ECM <M/T> or PCM <A/T>.
DIAGNOSIS
STEP 1. Check connector A-21X at MFI relay for damage.
Q: Is the connector in good condition?
YES : Go to Step 2.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection (
). Then confirm that
the malfunction symptom is eliminated.
AK000226
AK000226AB
CONNECTOR : A-21X
MFI RELAY
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>
13A-412
STEP 2. Check the MFI relay
(1) Remove the MFI relay.
(2) Check for continuity between the MFI relay terminals 2 and
4.
•
There should be continuity (approximately 70
Ω
)
(3) Use jumper wires to connect MFI relay terminal 4 to the
positive battery terminal and terminal 2 to the negative
battery terminal.
(4) Check the continuity between the MFI relay terminals 1 and
3 while connecting and disconnecting the jumper wire at
the negative battery terminal.
•
Should be less than 2 ohm. (Negative battery terminal
connected)
•
Should be open loop. (Negative battery terminal
disconnected)
(5) Install the MFI relay.
Q: Is the voltage normal?
YES : Go to Step 3.
NO : Replace the MFI relay. Then confirm that the
malfunction symptom is eliminated.
STEP 3. Check the power supply voltage at MFI relay
harness side connector A-21X.
(1) Disconnect the connector A-21X and measure at the
harness side.
(2) Measure the voltage between terminal 3, 4 and ground.
•
Voltage should be battery positive voltage.
Q: Is the voltage normal?
YES : Go to Step 4.
NO : Check harness connector C-07 at intermediate
connector for damage, and repair or replace as
required. Refer to, GROUP 00E, Harness Connector
Inspection (
). If intermediate connector is in
good condition, repair harness wire between fusible
link (13) and MFI relay connector A-21X terminal 3, 4
because of open circuit. Then confirm that the
malfunction symptom is eliminated.
AK000226
AK000226AB
CONNECTOR : A-21X
MFI RELAY
AK000369AB
MFI RELAY SIDE
CONNECTOR
1 2
3 4
AK000370AB
MFI RELAY SIDE
CONNECTOR
1 2
3 4
AK000371AB
1
2
3
4
A-21X HARNESS
SIDE CONNECTOR
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>
13A-413
STEP 4. Check connector C-60 at ECM <M/T> or connector
C-57 at PCM <A/T> for damage.
Q: Is the connector in good condition?
YES : Go to Step 5.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection (
). Then confirm that
the malfunction symptom is eliminated.
STEP 5. Check the ignition switch-IG signal voltage at ECM
harness side connector C-60 <M/T> or PCM harness side
connector C-57 <A/T>.
(1) Disconnect the connector C-60 <M/T> or C-57 <A/T> and
measure at the harness side.
(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between terminal 82 <M/T> or 98 <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 : Go to Step 6.
NO : Check harness connector C-07, C-89 and C-101 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 ignition switch connector C-87 terminal 2
and ECM connector C-60 terminal 82 <M/T> or PCM
connector C-57 terminal 98 <A/T> because of open
circuit. Then confirm that the malfunction symptom is
eliminated.
AK000280
C-60
ECM<M/T>
OR
PCM<A/T>
CONNECTORS:C-60<M/T>,C-57<A/T>
BE
C-57
AK000402 AC
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
<M/T>
C-60 HARNESS
SIDE CONNECTOR
AKX01435
77 76
89 88
98
75
87
97
86
96
85
95
84
82
83
94 93
81
92
80
74 73 72 71
79 78
91 90
AF
<A/T>
C-57 HARNESS
SIDE CONNECTOR
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>
13A-414
STEP 6. Check the backup power supply voltage at ECM
harness side connector C-60 <M/T> or PCM harness side
connector C-54 <A/T>.
(1) Disconnect the connector C-60 <M/T> or C-54 <A/T> and
measure at the harness side.
(2) Measure the voltage between terminal 80 <M/T> or 66 <A/
T> and ground.
•
Voltage should be battery positive voltage.
Q: Is the voltage normal?
YES : Go to Step 7.
NO : Check harness connector C-28, C-78 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 (4) and ECM connector C-60
terminal 80 <M/T> or PCM connector C-54 terminal
66 <A/T> because of open circuit. Then confirm that
the malfunction symptom is eliminated.
STEP 7. Check the continuity at ECM harness side
connector C-49 <M/T> or PCM harness side connector C-
54 <A/T>.
(1) Disconnect the connector C-49 <M/T> or C-54 <A/T> and
measure at the harness side.
(2) Check for the continuity between terminal (13, 26) <M/T> or
(42, 48) <A/T> and ground.
•
Should be less than 2 ohm.
Q: Is the continuity normal?
YES : Go to Step 8.
NO : Repair harness wire between ECM connector C-49
terminal (13, 26) <M/T> or PCM connector C-54
terminal (42, 48) <A/T> and ground because of open
circuit. Then confirm that the malfunction symptom is
eliminated.
AK000403 AC
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
<M/T>
C-60 HARNESS
SIDE CONNECTOR
AKX01436
46 45 44
57 56 55
66 65 64
54 53 52 51 50 49 48 47
43 42 41
63 62 61 60
59 58
C-54 HARNESS
SIDE CONNECTOR
<A/T>
AF
AK000404AC
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
<M/T>
C-49 HARNESS
SIDE CONNECTOR
AKX01437
C-54 HARNESS
SIDE CONNECTOR
<A/T>
46 45 44
57 56 55
66 65 64
54 53 52 51 50 49 48 47
43 42 41
63 62 61 60
59 58
AG
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст