Mitsubishi Eclipse. Manual — part 576
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L>
13B-847
STEP 3. Check the intake manifold tuning solenoid.
(1) Disconnect the intake manifold tuning solenoid connector
B-49.
(2) Measure the resistance between intake manifold tuning
solenoid side connector terminal No. 1 and No. 2.
Standard value: 29
− 35 ohms [at 20°C (68°F)]
Q: Is the resistance between 29 and 35 ohms?
YES : Go to Step 4.
NO : Replace the intake manifold tuning solenoid. Then go
to Step 12.
STEP 4. Check the power supply voltage at intake manifold
tuning solenoid harness side connector B-49.
(1) Disconnect the connector B-49 and measure at the harness
side.
(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between terminal 1 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 6.
NO : Go to Step 5.
AK300078
3
4
5
1
2
6
7
CONNECTOR: B-14
AB
B-14 (B)
HARNESS
CONNECTOR:
COMPONENT SIDE
AK102948
AK300078
3
4
5
1
2
6
7
CONNECTOR: B-14
AB
B-14 (B)
HARNESS
CONNECTOR:
COMPONENT SIDE
AK103038
1
2
B-49 HARNESS
CONNECTOR:
COMPONENT SIDE
AD
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L>
13B-848
STEP 5. 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 intake manifold tuning
solenoid connector B-49 (terminal No. 1) because of
open circuit or short circuit to ground. Then go to Step
12.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection
. Then go to Step 12.
STEP 6. Check the power supply voltage at ECM connector
C-51 <M/T> or PCM connector C-55 <A/T> by backprobing.
(1) Do not disconnect the connector C-51 <M/T> or C-55
<A/T>.
(2) Turn the ignition switch to the "ON" position.
AK300454
2
1
3
4
CONNECTOR: A-18X
AB
A-18X
HARNESS CONNECTOR:
COMPONENT SIDE
AK300462
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
CONNECTOR: C-55 <A/T>
C-55 (GR)
AB
HARNESS CONNECTOR:
COMPONENT SIDE
AK300443
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
CONNECTOR: C-51 <M/T>
C-51 (GR)
AB
HARNESS CONNECTOR:
COMPONENT SIDE
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L>
13B-849
(3) Measure the voltage between terminal No. 32 <M/T> or No.
53 <A/T> and ground by backprobing.
• Voltage should be battery positive voltage.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the voltage normal?
YES : Go to Step 9.
NO : Go to Step 7.
AK103039
1
2
3 4
5 6
7 8
10 11 12 13 14 15 16 17 18 19 20 21 22 23
24 25
26 27 28 29
30 31 32 33
34 35
C-51 HARNESS CONNECTOR:
HARNESS SIDE
AC
9
<M/T>
AK103040
41
AC
<A/T>
C-55 HARNESS CONNECTOR:
HARNESS SIDE
42 43
44 45 46
47 48 49 50 51 52 53 54 55 56 57
58 59
60 61 62
64 65 66
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L>
13B-850
STEP 7. Check connector C-51 at ECM <M/T> or connector
C-55 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 12.
AK300462
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
CONNECTOR: C-55 <A/T>
C-55 (GR)
AB
HARNESS CONNECTOR:
COMPONENT SIDE
AK300443
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
CONNECTOR: C-51 <M/T>
C-51 (GR)
AB
HARNESS CONNECTOR:
COMPONENT SIDE
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