Mitsubishi 380. Manual — part 555
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
MULTIPORT FUEL INJECTION (MFI)
13A-312
STEP 3. Check the No. 6 cylinder injector.
(1) Disconnect the No.6 cylinder injector connector B-26.
(2) Measure the resistance between injector side connector
terminal No. 1 and No. 2.
Standard value: 10.5
− 13.5 ohms [at 20°C (68°F)]
Q: Is the measured resistance between 10.5 and 13.5 ohms
[at 20
°C (68°F)]?
YES : Go to Step 4.
NO : Replace the No. 6 cylinder injector. Then go to Step
10.
AK303116
M
1
2
CONNECTOR: B-26
B-26 (GR)
HARNESS CONNECTOR:
COMPONENT SIDE
AB
AK000559
2
1
INJECTOR SIDE
CONNECTOR
AB
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
MULTIPORT FUEL INJECTION (MFI)
13A-313
STEP 4. Measure the power supply voltage at No. 6
cylinder injector connector B-26.
(1) Disconnect connector B-26 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 harness connector B-17X at MFI relay for
damage.
Q: Is the harness connector in good condition?
YES : Repair harness wire between MFI relay connector
B-17X (terminal No. 4) and injector connector
B-26 (terminal No. 1) because of open circuit or
short circuit to ground.
Then go to Step 10.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection
. Then go to Step 10.
AK303116
M
1
2
CONNECTOR: B-26
B-26 (GR)
HARNESS CONNECTOR:
COMPONENT SIDE
AB
AK303117
1
2
B-26 HARNESS
CONNECTOR:
COMPONENT SIDE
AB
1
2
3
4
AK303017
CONNECTOR: B-17X
FRONT OF VEHICLE
B-17X
AB
HARNESS
CONNECTOR:
COMPONENT SIDE
RELAY BOX
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
MULTIPORT FUEL INJECTION (MFI)
13A-314
STEP 6. Check for harness damage between MFI relay
connector B-17X and No. 6 cylinder injector connector
B-26 (terminal No. 1).
Q: Is the harness wire in good condition?
YES : Go to Step 7.
NO : Repair it. Then go to Step 10.
1
2
3
4
AK303017
CONNECTOR: B-17X
FRONT OF VEHICLE
B-17X
AB
HARNESS
CONNECTOR:
COMPONENT SIDE
RELAY BOX
AK303116
M
1
2
CONNECTOR: B-26
B-26 (GR)
HARNESS CONNECTOR:
COMPONENT SIDE
AB
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
MULTIPORT FUEL INJECTION (MFI)
13A-315
STEP 7. Check harness connector B-20 at ECU for
damage.
Q: Is the harness 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 10.
STEP 8. Check for open circuit and short circuit to ground
and harness damage between No. 6 cylinder injector
connector B-26 (terminal No. 2) and ECU connector B-20
(terminal No. 17).
Q: Is the harness wire in good condition?
YES : Go to Step 9.
NO : Repair it. Then go to Step 10.
16DB400A
COVER
ENGINE
CONTROL
UNIT
AIR
CLEANER
AK303116
M
1
2
CONNECTOR: B-26
B-26 (GR)
HARNESS CONNECTOR:
COMPONENT SIDE
AB
16DB400A
COVER
ENGINE
CONTROL
UNIT
AIR
CLEANER
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