Mitsubishi Eclipse. Manual — part 623
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L>
13B-1035
STEP 4. Check the power supply voltage at fuel pump relay
1 harness side connector C-107.
(1) Disconnect the connector C-107 and measure at the
harness side.
(2) Measure the voltage between terminal 4 and ground.
• Voltage should be battery positive voltage.
Q: Is battery positive voltage (approximately 12 volts)
present?
YES : Go to Step 5.
NO : Check harness connectors C-89 and C-112 at
intermediate connector for damage, and repair or
replace as required. Refer to, GROUP 00E, Harness
Connector Inspection
. If intermediate
connectors are in good condition, repair harness wire
between dedicated fuse and fuel pump relay 1
connector C-107 terminal 4 because of open circuit.
Then confirm that the malfunction symptom is
eliminated.
3
4
1
2
3
4
1
2
3
4
1
2
3
4
1
2
3
4
1
2
3
4
1
2
3
4
1
2
AK300745
CONNECTOR: C-107
AB
C-107
AK103736
1
2
3
4
1
2
3
4
AJ
C-107 HARNESS
CONNECTOR:
COMPONENT SIDE
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L>
13B-1036
STEP 5. Check the power supply voltage at fuel pump relay
1 harness side connector C-107.
(1) Disconnect the connector C-107 and measure at the
harness side.
(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between terminal 3 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 : Check harness connector C-111 at intermediate
connector for damage, and repair or replace as
required. Refer to, GROUP 00E, Harness Connector
Inspection
. If intermediate connector is in
good condition, repair harness wire between ignition
switch connector C-87 terminal 2 and fuel pump relay
1 connector C-107 terminal 3 because of open circuit.
Then confirm that the malfunction symptom is
eliminated.
3
4
1
2
3
4
1
2
3
4
1
2
3
4
1
2
3
4
1
2
3
4
1
2
3
4
1
2
AK300745
CONNECTOR: C-107
AB
C-107
AK101347
1
2
3
4
AU
C-107 HARNESS
CONNECTOR:
COMPONENT SIDE
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L>
13B-1037
STEP 6. Check the continuity at fuel pump relay 1 harness
side connector C-107.
(1) Disconnect the connector C-107 and measure at the
harness side.
(2) Check for the continuity between terminal 2 and ground.
• Should be less than 2 ohms.
Q: Is the continuity normal?
YES : Go to Step 7.
NO : Check harness connectors C-108 at intermediate
connector for damage, and repair or replace as
required. Refer to, GROUP 00E, Harness Connector
Inspection
. If intermediate connectors are in
good condition, repair harness wire between fuel
pump relay 1 connector C-107 terminal 2 and ground
because of open circuit. Then confirm that the
malfunction symptom is eliminated.
STEP 7. Check the power supply voltage at fuel pump relay
2 harness side connector C-105.
(1) Disconnect the connector C-105 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.
Q: Is battery positive voltage (approximately 12 volts)
present?
YES : Go to Step 8.
NO : Repair harness wire between fuel pump relay 1
connector C-107 terminal No. 1 and fuel pump relay 2
connector C-105 terminal No. 1 because of open
circuit. Then confirm that the malfunction symptom is
eliminated.
3
4
1
2
3
4
1
2
3
4
1
2
3
4
1
2
3
4
1
2
3
4
1
2
3
4
1
2
AK300745
CONNECTOR: C-107
AB
C-107
AK103839
1
2
3
4
1
2
3
4
AH
C-107 HARNESS
CONNECTOR:
COMPONENT SIDE
3
4
1
2
3
4
1
2
3
4
1
2
3
4
1
2
3
4
1
2
3
4
1
2
3
4
1
2
AK300746
CONNECTOR: C-105
AB
C-105
AK101349
1
2
3
4
AR
C-105 HARNESS
CONNECTOR:
COMPONENT SIDE
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L>
13B-1038
STEP 8. Check the power supply voltage at fuel pump relay
2 harness side connector C-105.
(1) Disconnect the connector C-105 and measure at the
harness side.
(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between terminal No. 3 and ground.
• 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 : Check harness connector C-111 at intermediate
connector for damage, and repair or replace as
required. Refer to, GROUP 00E, Harness Connector
Inspection
. If intermediate connector is in
good condition, repair harness wire between ignition
switch connector C-87 (terminal No. 2) and fuel pump
relay 2 connector C-105 (terminal No. 3) because of
open circuit. Then confirm that the malfunction
symptom is eliminated.
STEP 9. Check connector D-17 at fuel pump 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 confirm that the
malfunction symptom is eliminated.
3
4
1
2
3
4
1
2
3
4
1
2
3
4
1
2
3
4
1
2
3
4
1
2
3
4
1
2
AK300746
CONNECTOR: C-105
AB
C-105
AK101347
1
2
3
4
AV
C-105 HARNESS
CONNECTOR:
COMPONENT SIDE
AK300446
1
2
3
4
5
D-17 (GR)
AB
CONNECTOR: D-17
HARNESS CONNECTOR:
COMPONENT SIDE
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