Mitsubishi Eclipse. Manual — part 288
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L>
13A-645
STEP 5. Measure the power supply voltage at idle air
control motor harness side connector B-34.
(1) Disconnect the connector B-34 and measure at the harness
side.
(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between terminal No. 2, No. 5 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 7.
NO : Go to Step 6.
STEP 6. Check connector A-18X at MFI relay for damage.
Q: Is the connector in good condition?
YES : Repair harness wire between MFI relay connector
A-18X (terminal No. 4) and idle air control motor
connector B-34 (terminal No. 2, No. 5) because of
open circuit or short circuit to ground. Then go to Step
14.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection
. Then go to Step 14.
AK300408
1
2
3
4
5
6
CONNECTOR: B-34
AB
B-34 (B)
HARNESS CONNECTOR:
COMPONENT SIDE
AKX01428
3 2 1
A-34 HARNESS
CONNECTOR:
COMPONENT SIDE
AS
6 5 4
AK300454
2
1
3
4
CONNECTOR: A-18X
AB
A-18X
HARNESS CONNECTOR:
COMPONENT SIDE
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L>
13A-646
STEP 7. Measure the power supply voltage at ECM
connector C-49 <M/T> or PCM connector C-50 <A/T> by
backprobing.
(1) Do not disconnect the connector C-49 <M/T> or C-50
<A/T>.
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-647
(2) Measure the voltage between terminal (No. 4, No. 5, No.
17, No. 18) <M/T> or (No. 14, No. 15, No. 28, No. 29)
<A/T> and ground by backprobing.
• The voltage is 1 volt or lower for approximately 3 sec-
onds, then changes to the battery positive voltage when
the Ignition switch is turned from the "LOCK" (OFF)
position to the "ON" position.
(3) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the voltage normal?
YES : Go to Step 10.
NO : Go to Step 8.
AK000306
10
1 2 3 4 5 6 7 8 9
1112 13
141516171819 20 2122 23242526
AI
<M/T>
C-49 HARNESS
CONNECTOR:
HARNESS SIDE
AK000307
1
2
3 4
5 6
7 8
9 10 111213 1415 16 17 18 19 20 21 22 23
24 25
26 27 28 29
30 313233
34 35
AK
C-50 HARNESS
CONNECTOR:
HARNESS SIDE
<A/T>
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L>
13A-648
STEP 8. 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 9.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection
. Then go to Step 14.
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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