Mitsubishi Eclipse / Eclipse Spyder (2000-2002). Service and repair manual — part 320
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>
13B-479
CIRCUIT OPERATION
•
The ECM <M/T> or PCM <A/T> controls
generator out put current by duty-controlling
continuity between the generator G terminal
(terminal 1) and ground.
TROUBLESHOOTING HINTS (The most likely
causes for this charging system.)
•
Malfunction of the charging system.
•
Short circuit in the harness between generator G
terminal and ECM <M/T> or PCM <A/T>.
•
ECM <M/T> or PCM <A/T> failed.
DIAGNOSIS
STEP 1. Check the voltage at generator intermediate
connector B-13 by backprobing
(1) Do not disconnect the connector B-13.
(2) Start the engine and run at idle.
(3) Measure the voltage between terminal 2 and ground by
backprobing.
a. Engine: warming up
b. Radiator fan: stopped
c. Headlight switch: OFF to ON
d. Rear defogger switch: OFF to ON
e. Stoplight switch: OFF to On
•
Voltage rises by 0.2-3.5 volts.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the voltage normal?
YES : Replace the generator. Then confirm that the
malfunction symptom is eliminated.
NO : Go to Step 2.
AK000220
AK000220AB
CONNECTOR : B-13
AK000735AB
CONNECTOR:B-45
AK000225
CONNECTOR : C-51<M/T>, C-52<A/T>
C-52
C-51
PCM<A/T>
ECM<M/T>
AJ
AK000365 AB
B-13 CONNECTOR
HARNESS
SIDE VIEW
1 2 3 4
5 6 7 8
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>
13B-480
STEP 2. Check connector B-13 at generator intermediate
connector 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.
STEP 3. Check connector B-45 at generator connector for
damage.
Q: Is the connector in good condition?
YES : Go to Step 4.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection (
). Then confirm that
the malfunction symptom is eliminated.
STEP 4. Check connector C-51 at ECM <M/T> or connector
C-52 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.
AK000220
AK000220AB
CONNECTOR : B-13
AK000735AB
CONNECTOR:B-45
AK000225
CONNECTOR : C-51<M/T>, C-52<A/T>
C-52
C-51
PCM<A/T>
ECM<M/T>
AJ
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>
13B-481
STEP 5. Check for open circuit and short circuit to ground
and harness damage between generator connector B-45
terminal 1 and ECM connector C-51 terminal 8 <M/T> or
PCM connector C-52 terminal 8 <A/T>.
Q: Is the harness wire in good condition?
YES : Replace the ECM or PCM. Then confirm that the
malfunction symptom is eliminated.
NO : Repair it. Then confirm that the malfunction symptom
is eliminated.
AK000735AB
CONNECTOR:B-45
AK000225
CONNECTOR : C-51<M/T>, C-52<A/T>
C-52
C-51
PCM<A/T>
ECM<M/T>
AJ
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>
13B-482
INSPECTION PROCEDURE 27: Incorrect Idle Speed When the A/C is Operating (A/C Switch 2 Signal)
CIRCUIT OPERATION
•
The ECM <M/T> or PCM <A/T> increases the
engine idle speed by driving the IAC motor when
the automatic compressor-ECU sends a "A/C on"
signal to the module.
•
The automatic compressor-ECU detects how the
air conditioning is applying load to the engine,
and converts the information to a voltage signal
(High voltage= low load, Low voltage= high load).
This voltage signal is called "A/C switch 2 signal."
The ECM <M/T> or PCM <A/T> receives this A/C
switch 2 signal from the automatic compressor
controller through terminal 65 <M/T> or terminal
61 <A/T>, and determines the idle-up speed
according to the high or low air conditioning load.
TROUBLESHOOTING HINTS (The most likely
causes for this code to be set are:)
•
Malfunction of the A/C control system.
•
Open or shorted circuit, or improper connector
contact.
•
ECM <M/T> or PCM <A/T> failed.
AK000714
BL
UE-
WHITE
BL
UE-
WHITE
ENGINE CONTROL
MODULE(ECM)<M/T>
OR
POWERTRAIN CONTROL
MODULE(PCM)<A/T>
65<M/T>
61<A/T>
33
AUTOMATIC COMPRESSOR CONTROLLER
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
65
43
50
42
49
41
48
60 61
64
46 47
58 59
67 68
45
56
66
52
51
44
53
62
54
63
57
55
C-58<M/T>
(MU803782)
C-55<A/T>
(MU803781)
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
AK000225
CONNECTOR : C-58<M/T>, C-55<A/T>
C-55
C-58
PCM<A/T>
ECM<M/T>
AI
AK000733AC
CONNECTOR:C-28
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