Mitsubishi 380. Manual — part 616
MULTIPORT FUEL INJECTION (MPI) DIAG
MULTIPORT FUEL INJECTION (MPI)
13A-556
STEP 8. Check the right bank injector resistance at
intermediate connector B-32.
(1) Disconnect the intermediate connector B-32.
(2) Measure the resistance between each male connector side
terminal.
a. Measure the resistance between terminal No. 9 and No.
5 at No. 1 cylinder injector.
b. Measure the resistance between terminal No. 9 and No.
10 at No. 3 cylinder injector.
c. Measure the resistance between terminal No. 9 and No.
4 at No. 5 cylinder injector.
• Resistance should be between 10.5 and 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 11.
NO : Go to Step 9.
STEP 9. Check the right bank injector.
(1) Remove the intake manifold.
(2) Disconnect the right bank injector connector, which
deviates from the standard value at Step 7.
(3) 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 10.
NO : Replace the injector. Then confirm that the
malfunction symptom is eliminated.
AK303053
3
4
5
8
9
1
2
6
7
10
CONNECTOR: B-32
HARNESS CONNECTOR:
COMPONENT SIDE
AB
B-32 (B)
1 2 3
6 7 8
4 5
9 10
AK203093
B-32
INTERMEDIATE
CONNECTOR
AB
AK303055
M
1
2
CONNECTOR: B-01, B-03, B-04
AB
B-01 (GR)
B-03 (GR)
B-04 (GR)
HARNESS CONNECTOR:
COMPONENT SIDE
AK000559
2
1
INJECTOR SIDE
CONNECTOR
AB
MULTIPORT FUEL INJECTION (MPI) DIAG
MULTIPORT FUEL INJECTION (MPI)
13A-557
STEP 10. Check harness connector B-03 or B-04 or B-01 at
right bank injector for damage.
(1) Check the injector connector, which deviates from the
standard value at Step 9.
Q: Is the harness connector in good condition?
YES : Repair harness wire between injector intermediate
connector and right bank injector connector because
of harness damage. Then confirm that the
malfunction symptom is eliminated.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection
. Then confirm that the
malfunction symptom is eliminated.
STEP 11. Check harness connector B-32 at intermediate
connector for damage.
Q: Is the harness connector in good condition?
YES : Go to Step 12.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection
. Then confirm that the
malfunction symptom is eliminated.
STEP 12. Check harness connector B-27, B-26, B-30 at left
bank injector for damage.
Q: Is the harness connector in good condition?
YES : Go to Step 13.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection
.Then confirm that the
malfunction symptom is eliminated.
AK303055
M
1
2
CONNECTOR: B-01, B-03, B-04
AB
B-01 (GR)
B-03 (GR)
B-04 (GR)
HARNESS CONNECTOR:
COMPONENT SIDE
AK303053
3
4
5
8
9
1
2
6
7
10
CONNECTOR: B-32
HARNESS CONNECTOR:
COMPONENT SIDE
AB
B-32 (B)
AK303075
M
1
2
CONNECTOR: B-26, B-27, B-30
B-30 (GR)
B-27 (GR)
B-26 (GR)
HARNESS CONNECTOR:
COMPONENT SIDE
AB
MULTIPORT FUEL INJECTION (MPI) DIAG
MULTIPORT FUEL INJECTION (MPI)
13A-558
STEP 13. Check harness connector B-20 at ENGINE-ECU
for damage.
Q: Is the harness connector in good condition?
YES : Go to Step 14.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection
. Then confirm that the
malfunction symptom is eliminated.
16DB400A
COVER
ENGINE
CONTROL
UNIT
AIR
CLEANER
MULTIPORT FUEL INJECTION (MPI) DIAG
MULTIPORT FUEL INJECTION (MPI)
13A-559
STEP 14. Check for harness damage between injector
connector and ENGINE-ECU connector.
a. Check the harness wire between injector connector
B-01 (terminal No. 2) and ENGINE-ECU connector B-20
(terminal No. 03) at No. 1 cylinder injector.
b. Check the harness wire between injector connector
B-30 (terminal No. 2) and ENGINE-ECU connector B-20
(terminal No. 04) at No. 2 cylinder injector.
c. Check the harness wire between injector connector
B-03 (terminal No. 2) and ENGINE-ECU connector B-20
(terminal No. 34) at No. 3 cylinder injector.
d. Check the harness wire between injector connector
B-27 (terminal No. 2) and ENGINE-ECU connector B-20
(terminal No. 35) at No. 4 cylinder injector.
e. Check the harness wire between injector connector
B-04 (terminal No. 2) and ENGINE-ECU connector B-20
(terminal No. 16) at No. 5 cylinder injector.
f. Check the harness wire between injector connector
B-26 (terminal No. 2) and ENGINE-ECU connector B-20
(terminal No. 17) at No. 6 cylinder injector.
Q: Is the harness wire in good condition?
YES : Check the following items, and repair or replace the
defective items.
a. Check the ignition coil and spark plugs.
b. Check if the injectors are clogged.
c. Check compression pressure.
d. Check fuel lines for clogging.
e. Check if the foreign materials (water,
kerosene, etc.) got into fuel.
Then confirm that the malfunction symptom is
eliminated.
NO : Repair it. Then confirm that the malfunction symptom
is eliminated.
STEP 15. Check injector is insulated from earth.
(1) Measure the resistance between each injector housing and
earth.
Q: Is there no continuity?
YES : ok.
NO : Repair or replace injector. Then confirm that the
malfunction symptom is eliminated.
AK303235
M
1
2
AB
B-30 (GR)
B-04 (GR)
B-01 (GR)
B-27 (GR)
B-03 (GR)
B-26 (GR)
CONNECTOR: B-01, B-03, B-04, B-26,B-27,
B-30
HARNESS CONNECTOR:
COMPONENT SIDE
16DB400A
COVER
ENGINE
CONTROL
UNIT
AIR
CLEANER
03DB230A
INJECTOR
HOUSING
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