Mitsubishi Eclipse. Manual — part 296
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L>
13A-677
DIAGNOSIS
STEP 1. Measure 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 No. 3 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 should be drops.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the voltage normal?
YES : Go to Step 2.
NO : Go to Step 4.
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 go to Step 11.
STEP 3. Check the trouble symptoms.
(1) Carry out a test drive with the drive cycle pattern. Refer to
Diagnostic Function
− OBD-II Drive Cycle − Procedure 6 −
Other Monitor
(2) Check the diagnostic trouble code (DTC).
Q: Is DTC P0622 set?
YES : Replace the ECM or PCM. Then go to Step 11.
NO : It can be assumed that this malfunction is intermittent.
Refer to GROUP 00, How to Use
Troubleshooting/Inspection Service Points
AK300739
CONNECTOR: B-13
AB
B-13 (B)
3
4
7
8
1
2
5
6
HARNESS CONNECTOR:
COMPONENT SIDE
AK000262
B-13 HARNESS
CONNECTOR:
HARNESS SIDE
1 2 3 4
5 6 7 8
AE
AK300739
CONNECTOR: B-13
AB
B-13 (B)
3
4
7
8
1
2
5
6
HARNESS CONNECTOR:
COMPONENT SIDE
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L>
13A-678
STEP 4. Check connector B-13 at generator intermediate
connector 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 go to Step 11.
STEP 5. Check connector B-45 at generator connector for
damage.
Q: Is the connector in good condition?
YES : Go to Step 6.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection
. Then go to Step 11.
STEP 6. Measure the voltage at generator harness side
connector B-45.
(1) Disconnect the connector B-45 and measure at the harness
side.
(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between terminal No. 4 and ground.
• Voltage should be battery positive voltage.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is battery positive voltage (approximately 12 volts)
present?
YES : Go to Step 9.
NO : Go to Step 7.
AK300739
CONNECTOR: B-13
AB
B-13 (B)
3
4
7
8
1
2
5
6
HARNESS CONNECTOR:
COMPONENT SIDE
AK300740
2
1
3
4
CONNECTOR: B-45
AB
B-45 (GR)
HARNESS CONNECTOR:
COMPONENT SIDE
AK300740
2
1
3
4
CONNECTOR: B-45
AB
B-45 (GR)
HARNESS CONNECTOR:
COMPONENT SIDE
AK000263
B-45 HARNESS
CONNECTOR:
COMPONENT SIDE
1
2
3
4
AO
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L>
13A-679
STEP 7. Check connector C-53 at ECM <M/T> or connector
C-54 at PCM <A/T> for damage.
Q: Is the connector in good condition?
YES : Go to Step 8.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection
. Then go to Step 11.
AK300417
34 33 32
36 35
37
42
45
31
39
38
46
40
41
43
44
CONNECTOR: C-53 <M/T>
C-53 (G)
AB
HARNESS CONNECTOR:
COMPONENT SIDE
AK300412
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
C-54 (GR)
CONNECTOR: C-54 <A/T>
AB
HARNESS CONNECTOR:
COMPONENT SIDE
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L>
13A-680
STEP 8. Check for open circuit and short circuit to ground
between generator connector B-45 (terminal No. 4) and
ECM connector C-53 (terminal No. 41) <M/T> or PCM
connector C-54 (terminal No. 54) <A/T>.
Q: Is the harness wire in good condition?
YES : Replace the ECM or PCM. Then go to Step 11.
NO : Repair it. Then go to Step 11.
AK300740
2
1
3
4
CONNECTOR: B-45
AB
B-45 (GR)
HARNESS CONNECTOR:
COMPONENT SIDE
AK300417
34 33 32
36 35
37
42
45
31
39
38
46
40
41
43
44
CONNECTOR: C-53 <M/T>
C-53 (G)
AB
HARNESS CONNECTOR:
COMPONENT SIDE
AK300412
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
C-54 (GR)
CONNECTOR: C-54 <A/T>
AB
HARNESS CONNECTOR:
COMPONENT SIDE
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