Mitsubishi Eclipse / Eclipse Spyder (2000-2002). Service and repair manual — part 177
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>
13A-407
CIRCUIT OPERATION
•
The ECM <M/T> or PCM <A/T> sends a duty
signal to the fan controller according to engine
coolant temperature, vehicle speed, and the
condition of the A/C switch. (The closer the
average voltage at the terminal comes to five
volts, the higher the fan speed becomes).
TROUBLESHOOTING HINTS (The most likely
causes for this code to be set are:)
•
Malfunction of the fan motor relay.
•
Malfunction of the fan motor.
•
Malfunction of the fan controller
•
Improper connector contact, open or short-
circuited harness wire.
•
ECM <M/T> or PCM <A/T> failed.
DIAGNOSIS
STEP 1. Check connector C-49 at ECM <M/T> or connector
C-50 at PCM <A/T> 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.
ACX02501 AE
CONNECTOR : A-30
FAN
CONTROLLER
AK000280
C-49,C-50
ECM<M/T>
OR
PCM<A/T>
CONNECTORS:C-49<M/T>,C-50<A/T>
BC
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>
13A-408
STEP 2. Check the output voltage at ECM harness side
connector C-49 <M/T> or PCM harness side 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.
(3) Measure the voltage between terminal 21 <M/T> or 18 <A/
T> and ground.
•
Voltage should be between 4.8 and 5.2 volts. (Fan
rotates at high speed.)
(4) Connect a jumper cable between 21 <M/T> or 18 <A/T>
and ground.
•
The fan should stop.
(5) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the voltage and fan condition normal?
YES : Replace the ECM or PCM. Then confirm that the
malfunction symptom is eliminated.
NO : Go to Step 3.
STEP 3. Check for open circuit and short circuit to ground
and harness damage between fan controller A-30 terminal
2 and ECM connector C-49 terminal 21 <M/T> or PCM
connector C-50 terminal 18 <A/T>.
NOTE: Check harness after checking intermediate connector
C-07. If intermediate connector is damaged, repair or replace
them. Refer to GROUP 00E, Harness Connector Inspection
(
). Then confirm that the malfunction symptom is
eliminated.
Q: Is the harness wire in good condition?
YES : Refer to GROUP 14-Engine Cooling Diagnosis-
Symptom Chart (
).
NO : Repair it. Then confirm that the malfunction symptom
is eliminated.
AK000400AC
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
AK000401AD
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
32
33
34
35
<A/T>
C-50 HARNESS
SIDE CONNECTOR
ACX02501 AE
CONNECTOR : A-30
FAN
CONTROLLER
AK000280
C-49,C-50
ECM<M/T>
OR
PCM<A/T>
CONNECTORS:C-49<M/T>,C-50<A/T>
BC
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>
13A-409
INSPECTION PROCEDURE 29: Power supply system and ignition switch-IG system.
AK000679
4
1 2
3
6
2 3
4 5 6
GREEN
1
1
3
2
4
1
4
8
7
2
6
3
5
5
BLA
CK-
WHITE
BLA
CK-
WHITE
BLA
CK-
WHITE
ORANGE-
BLA
CK
ORANGE-
BLA
CK
ORANGE-
BLA
CK
ORANGE-
BLA
CK
RED
RED
RED
WHITE-VIOLET
RED-
WHITE
RED-
WHITE
RED-
WHITE
RED-
WHITE
WHITE
WHITE
BLA
CK
BLA
CK
BLA
CK
BLA
CK
BLA
CK
BATTERY
R
IG2
ST
LOCK
ACC
IG1
C-87
C-87
C-101
MU801331
C-101
IGNITION
SWITCH
2
6
5
6
9
JUNCTION
BLOCK
82<M/T>*3
98<A/T>*5
C-07
MU801333
80<M/T>*3
66<A/T>*4
MFI
RELAY
JOINT
GROUND
POINT
JOINT
CONNECTOR
A-21X
A-21X
3
4
1
2
38<M/T>*2
49<A/T>*4
BATTERY
BACK UP
12<M/T>*1
47<A/T>*4
25<M/T>*1
41<A/T>*4
POWER
SOURCE
26<M/T>*1
48<A/T>*4
13<M/T>*1
42<A/T>*4
NOTE
*1:ECM connector C-49<M/T>
*2:ECM connector C-53<M/T>
*3:ECM connector C-60<M/T>
*4:PCM connector C-54<A/T>
*5:PCM connector C-57<A/T>
ENGINE CONTROL MODULE(ECM)<M/T> OR
POWERTRAIN CONTROL MODULE(PCM)<A/T>
C-54<A/T>
(MU803781)
C-60<M/T>
(MU803772)
C-57<A/T>
(MU803782)
C-53<M/T>
(MU803771)
C-49<M/T>
(MU803773)
3
8
13
29
1
14
4
19
5
22
6
17
8
15
9
18
7
20
16
2
13
12
23 24 25 26
21
3
10 11
82
78
81
80
89 90 91 92
79
87
71
74
73
72
76
75
77
85
88
83 84
86
98
78
71
88 89
76 77
72
79
91
73
80
74
75
81
92
8283
93
8485
94
8687
9596
90
97
34
33
32
36
35
37
42
45
31
39
38
46
40 41
43 44
42 43
48 49 50 51 52 53 54 55 56 57
46
45
44
58 59
60 61 62 63
64 65 66
47
41
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
C-07
C-07
25
C-89
27
C-28
C-78
C-89
C-28
C-78
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
16
15
18
17
14
20
22
21
9
7
1 2
5
19
3
33
32
30 31
29
28
25
24
23
27
26
6
11
13
4
10
8
12
4
DEDICATED
FUSE
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>
13A-410
CIRCUIT OPERATION
•
Battery positive voltage is applied to the MFI
relay (terminals 3, 4).
•
When the ignition switch is turned to the "ON"
position, The battery positive voltage is applied to
the ECM (terminal 82) <M/T> or PCM (terminal
98) <A/T>.When the battery positive voltage is
applied, the ECM <M/T> or PCM <A/T> turns the
power transistor in the ECM <M/T> or PCM <A/
T> "ON" and grounds the MFI relay coil. With
this, the MFI relay turns "ON" and the battery
positive voltage is supplied to the ECM (terminal
12, 25) <M/T> or PCM (terminal 41, 47) <A/T>
from the MFI relay (terminal 1).
•
Battery positive voltage is constantly supplied to
the ECM (terminal 80) <M/T> or PCM (terminal
66) <A/T> as the backup power.
AK000280
C-49
C-53,
C-54
C-60
C-57
ECM<M/T>
OR
PCM<A/T>
CONNECTORS:C-49,C-53,C-60<M/T>,
C-54,C-57<A/T>
BM
AK000345AE
CONNECTOR:C-89
AK000219
CONNECTOR:C-87
AC
AK000312AJ
CONNECTOR:C-07
AK000226
AK000226AB
CONNECTOR : A-21X
MFI RELAY
AK000312AG
CONNECTOR:C-78
AK000315
CONNECTOR:C-101
AC
AK000733AC
CONNECTOR:C-28
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст