Mitsubishi Eclipse. Manual — part 241
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L>
13A-457
STEP 2. Check connector B-31 at the EGR vacuum
regulator solenoid valve 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 12.
STEP 3. Check the EGR vacuum regulator solenoid valve.
(1) Disconnect the EGR vacuum regulator solenoid valve
connector B-31.
(2) Measure the resistance between EGR vacuum regulator
solenoid valve 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 EGR vacuum regulator solenoid valve.
Then go to Step 12.
AK300406
1
2
CONNECTOR: B-31
AB
B-31 (BR)
HARNESS CONNECTOR:
COMPONENT SIDE
AK300406
1
2
CONNECTOR: B-31
AB
B-31 (BR)
HARNESS CONNECTOR:
COMPONENT SIDE
AKX00352
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L>
13A-458
STEP 4. Measure the power supply voltage at EGR vacuum
regulator solenoid valve harness side connector B-31.
(1) Disconnect the connector B-31 and measure at the harness
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 6.
NO : Go to Step 5.
STEP 5. Check connector A-18X at MFI relay for damage.
Q: Is the connector in good condition?
YES : Check connector B-13 at intermediate connector for
damage, and repair or replace as required. Refer to
GROUP 00E, Harness Connector Inspection
. If intermediate connectors is in good
condition, repair harness wire between MFI relay
connector A-18X (terminal No. 4) and EGR vacuum
regulator solenoid valve connector B-101 (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.
AK300406
1
2
CONNECTOR: B-31
AB
B-31 (BR)
HARNESS CONNECTOR:
COMPONENT SIDE
AK000254AN
B-31 HARNESS
CONNECTOR:
COMPONENT SIDE
2 1
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-459
STEP 6. 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>.
(2) Turn the ignition switch to the "ON" position.
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-460
(3) Measure the voltage between terminal No. 6 and ground by
backprobing.
• 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.
AK000298
10
1 2 3 4 5 6 7 8 9
1112 13
141516171819 20 2122 23242526
AH
<M/T>
C-49 HARNESS
CONNECTOR:
HARNESS SIDE
AK000299
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>
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