Mitsubishi Eclipse. Manual — part 136
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L>
13A-37
STEP 4. Check for short circuit to ground between volume
airflow sensor connector B-14 (terminal No. 7) and ECM
connector C-49 (terminal No. 19) <M/T> or PCM connector
C-50 (terminal No. 19) <A/T>.
Q: Is the harness wire in good condition?
YES : Replace the volume airflow sensor. Then go to Step
NO : Repair it. Then go to Step 9.
AK300078
3
4
5
1
2
6
7
CONNECTOR: B-14
AB
B-14 (B)
HARNESS
CONNECTOR:
COMPONENT SIDE
AK300413
1
14
4
19
5
22
6
17
8
15
9
18
7
20
16
2
21
23
26
24
25
3
10
11
12
13
CONNECTOR: C-49 <M/T>
C-49 (G)
AB
HARNESS CONNECTOR:
COMPONENT SIDE
AK300414
2
3
4
5
6
7
8
9
11
12
13
14
15
16
17
18
19
20
30
21
22
23
24
25
26
27
28
29
31
32
33
34
35
1
10
C-50 (GR)
CONNECTOR: C-50 <A/T>
AB
HARNESS CONNECTOR:
COMPONENT SIDE
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L>
13A-38
STEP 5. Measure the reset signal voltage at volume airflow
sensor connector B-14 by backprobing.
(1) Do not disconnect the connector B-14.
(2) Start the engine and run at idle.
(3) Measure the voltage between terminal No. 7 and ground by
backprobing.
• When the engine idling, voltage should be 1.0 volt or
less.
• When the engine speed is 3,000 r/min, voltage should
be between 6.0 and 9.0 volts.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the measured voltage between 6.0 and 9.0 volts?
YES : Go to Step 8.
NO : Go to Step 6.
AK300078
3
4
5
1
2
6
7
CONNECTOR: B-14
AB
B-14 (B)
HARNESS
CONNECTOR:
COMPONENT SIDE
AKX01515 AG
B-14 HARNESS
CONNECTOR:
HARNESS SIDE
1 2 3 4 5 6 7
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L>
13A-39
STEP 6. Check connector B-14 at volume airflow sensor
and 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 7.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection
. Then go to Step 9.
AK300078
3
4
5
1
2
6
7
CONNECTOR: B-14
AB
B-14 (B)
HARNESS
CONNECTOR:
COMPONENT SIDE
AK300413
1
14
4
19
5
22
6
17
8
15
9
18
7
20
16
2
21
23
26
24
25
3
10
11
12
13
CONNECTOR: C-49 <M/T>
C-49 (G)
AB
HARNESS CONNECTOR:
COMPONENT SIDE
AK300414
2
3
4
5
6
7
8
9
11
12
13
14
15
16
17
18
19
20
30
21
22
23
24
25
26
27
28
29
31
32
33
34
35
1
10
C-50 (GR)
CONNECTOR: C-50 <A/T>
AB
HARNESS CONNECTOR:
COMPONENT SIDE
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L>
13A-40
STEP 7. Check for open circuit and harness damage
between volume airflow sensor connector B-14 (terminal
No. 7) and ECM connector C-49 (terminal No. 19) <M/T> or
PCM connector C-50 (terminal No. 19) <A/T>.
Q: Is the harness wire in good condition?
YES : Replace the ECM or PCM. Then go to Step 9.
NO : Repair it. Then go to Step 9.
AK300078
3
4
5
1
2
6
7
CONNECTOR: B-14
AB
B-14 (B)
HARNESS
CONNECTOR:
COMPONENT SIDE
AK300413
1
14
4
19
5
22
6
17
8
15
9
18
7
20
16
2
21
23
26
24
25
3
10
11
12
13
CONNECTOR: C-49 <M/T>
C-49 (G)
AB
HARNESS CONNECTOR:
COMPONENT SIDE
AK300414
2
3
4
5
6
7
8
9
11
12
13
14
15
16
17
18
19
20
30
21
22
23
24
25
26
27
28
29
31
32
33
34
35
1
10
C-50 (GR)
CONNECTOR: C-50 <A/T>
AB
HARNESS CONNECTOR:
COMPONENT SIDE
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