Mitsubishi Galant 9G. Manual — part 884
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>
13A-978
STEP 5. Using scan tool MB991958, check actuator test.
(1) Turn the ignition switch to the "ON" position.
(2) Check the following items in the actuator test. Refer to
a. Item 07: Fuel pump.
(3) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the actuator operating properly?
YES : Go to Step 6.
NO : Repair or replace it.Then confirm that the malfunction
symptom is eliminated.
STEP 6. Check the ignition system.
(1) Connect the timing to terminal No. 1 of the ignition coil
connector B-101, B-102, B-117 or B-118 in order.
(2) Crank the engine.
• The timing light flashes.
(3) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Does a tachometer move?
YES : Go to Step 7.
NO : Refer to INSPECTION PROCEDURE 31
− Ignition
Circuit System
STEP 7. Check the ignition timing.
(1) Check the ignition timing at cranking.
Standard value: 5
° BTDC ± 3°
Q: Is the ignition timing normal?
YES : Go to Step 8.
NO : Check that the crankshaft position sensor and timing
belt cover are in the correct position. Then confirm
that the malfunction symptom is eliminated.
AK303804AB
MB991910
DATA LINK
CONNECTOR
MB991824
MB991827
1
2
3
AK303919
B-101(GR)
B-102 (GR) B-117 (GR)
B-118 (GR)
CONNECTORS: B-101, B-102, B-117, B-118
HARNESS CONNECTOR:
COMPONENT SIDE
AB
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>
13A-979
STEP 8. Check harness connector B-01 or B-03 or B-27 or
B-30 at injector for damage.
Q: Is the harness connector in good condition?
YES : Go to Step 9.
NO : Repair or replace it. Refer to GROUP 00E, Harness
. Then confirm that the
malfunction symptom is eliminated.
STEP 9. Check the injector.
(1) Disconnect the injector connector B-01, B-03, B-27 and
B-30.
(2) Measure the resistance between each 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 : Repair the injector. Then confirm that the malfunction
symptom is eliminated.
M
1
2
AK303920
B-01 (GR)
B-03 (GR)
B-30 (GR)
B-27 (GR)
CONNECTORS: B-01, B-03, B-27, B-30
HARNESS CONNECTOR:
COMPONENT SIDE
AB
M
1
2
AK303920
B-01 (GR)
B-03 (GR)
B-30 (GR)
B-27 (GR)
CONNECTORS: B-01, B-03, B-27, B-30
HARNESS CONNECTOR:
COMPONENT SIDE
AB
AK000559
2
1
INJECTOR SIDE
CONNECTOR
AB
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>
13A-980
STEP 10. Check harness connector B-23 at PCM for
damage.
Q: Is the harness connector in good condition?
YES : Go to Step 11.
NO : Repair or replace it. Refer to GROUP 00E, Harness
. Then confirm that the
malfunction symptom is eliminated.
127 126 125 124 123 122 121
133 132 131 130 129 128
140 139 138 137 136 135 134
146 145 144 143 142 141
153 152 151 150 149 148 147
AK303058
HARNESS CONNECTOR:
COMPONENT SIDE
CONNECTOR: B-23
B-23
PCM
AB
AIR CLEANER
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>
13A-981
STEP 11. Check for harness damage between injector
connector and PCM connector.
a. Check the harness wire between injector connector B-01
(terminal No. 2) and PCM connector B-23 (terminal No.
153) at No. 1 cylinder.
b. Check the harness wire between injector connector B-30
(terminal No. 2) and PCM connector B-23 (terminal No.
146) at No. 2 cylinder.
c. Check the harness wire between injector connector B-03
(terminal No. 2) and PCM connector B-23 (terminal No.
140) at No. 3 cylinder.
d. Check the harness wire between injector connector B-27
(terminal No. 2) and PCM connector B-23 (terminal No.
139) at No. 4 cylinder.
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 if fuel is contaminated.
d. Check compression.
Then confirm that the malfunction symptom is
eliminated.
NO : Repair it. Then confirm that the malfunction symptom
is eliminated.
INSPECTION PROCEDURE 6: Starts Up and Dies.
.
COMMENT
• In such cases as the above, the cause is usually
improper air/fuel mixture. It is possible, though
less likely, that the spark plugs are generating
sparks but the sparks are weak.
.
TROUBLESHOOTING HINTS (The most
likely causes for this case:)
• Malfunction of the ignition system.
• Malfunction of the injector system.
• Contaminated fuel.
• Poor compression.
• Dirtiness around throttle valve.
• Malfunction of the PCM.
M
1
2
AK303920
B-01 (GR)
B-03 (GR)
B-30 (GR)
B-27 (GR)
CONNECTORS: B-01, B-03, B-27, B-30
HARNESS CONNECTOR:
COMPONENT SIDE
AB
127 126 125 124 123 122 121
133 132 131 130 129 128
140 139 138 137 136 135 134
146 145 144 143 142 141
153 152 151 150 149 148 147
AK303058
HARNESS CONNECTOR:
COMPONENT SIDE
CONNECTOR: B-23
B-23
PCM
AB
AIR CLEANER
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