Mitsubishi Eclipse. Manual — part 493
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L>
13B-515
STEP 5. Check the injector.
(1) Disconnect the injector connector B-01 <No. 1 cylinder> or
B-05 <No. 3 cylinder> or B-26 <No. 5 cylinder>.
(2) Measure the resistance between injector side connector
terminal No. 1 and No. 2.
Standard value: 13
− 16 ohms [at 20°C (68°F)]
Q: Is the resistance between 13 and 16 ohms?
YES : Repair harness wire between injector intermediate
connector and injector connector because of open
circuit or short circuit to ground or harness
damage.
a. Repair harness wire between injector
intermediate connector B-48 (terminal No. 1)
and injector connector B-01 (terminal No. 1)
and harness wire between injector connector
B-01 (terminal No. 2) and injector intermediate
connector B-48 (terminal No. 2) when
checking No. 1 cylinder.
b. Repair harness wire between injector
intermediate connector B-48 (terminal No. 1)
and injector connector B-05 (terminal No. 1)
and harness wire between injector connector
B-05 (terminal No. 2) and injector intermediate
connector B-48 (terminal No. 3) when
checking No. 3 cylinder.
c. Repair harness wire between injector
intermediate connector B-48 (terminal No. 1)
and injector connector B-26 (terminal No. 1)
and harness wire between injector connector
B-26 (terminal No. 2) and injector intermediate
connector B-48 (terminal No. 4) when
checking No. 5 cylinder.
Then go to Step 12.
NO : Replace the injector. Then go to Step 12.
AK300752
1
2
CONNECTORS: B-01, B-05, B-26
AB
B-05 (GR) B-26 (GR)
B-01 (GR)
HARNESS CONNECTOR:
COMPONENT SIDE
AK000241
INJECTOR SIDE
CONNECTOR
1 2
AB
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L>
13B-516
STEP 6. Check the power supply voltage at injector
intermediate connector B-48.
(1) Disconnect the connector B-48 and measure at the female
connector side.
(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between terminal No. 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 8.
NO : Go to Step 7.
STEP 7. 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 injector intermediate
connector B-48 (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.
AK300085
CONNECTOR: B-48
AB
B-48 (B)
AK000271AB
2 1
4 3
INJECTOR
INTERMEDATE
CONNECTOR
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) <3.0L>
13B-517
STEP 8. Check for harness damage between MFI relay
connector A-18X (terminal No. 4) and injector intermediate
connector B-48 (terminal No. 1).
Q: Is the harness wire in good condition?
YES : Go to Step 9.
NO : Repair it. Then go to Step 12.
AK300454
2
1
3
4
CONNECTOR: A-18X
AB
A-18X
HARNESS CONNECTOR:
COMPONENT SIDE
AK300751
1
2
3
4
CONNECTOR: B-48
AB
B-48 (B)
HARNESS CONNECTOR:
COMPONENT SIDE
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L>
13B-518
STEP 9. 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 10.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection
. Then go to Step 12.
AK300458
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-52 <A/T>
C-52 (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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