Mitsubishi Galant 9G. Manual — part 909
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>
13A-1078
STEP 6. Check harness connector B-23 at PCM for
damage.
Q: Is the harness connector in good condition?
YES : Go to Step 7.
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-1079
STEP 7. Check for open circuit and short circuit to ground
between ignition coil connector and PCM connector.
a. Check the harness wire between ignition coil connector
B-101 (terminal No. 3) and PCM connector B-23 (terminal
No. 151) at ignition coil 1.
b. Check the harness wire between ignition coil connector
B-118 (terminal No. 3) and PCM connector B-23 (terminal
No. 143) at ignition coil 2.
c. Check the harness wire between ignition coil connector
B-102 (terminal No. 3) and PCM connector B-23 (terminal
No. 150) at ignition coil 3.
d. Check the harness wire between ignition coil connector
B-117 (terminal No. 3) and PCM connector B-23 (terminal
No. 148) at ignition coil 4.
Q: Is the harness wire in good condition?
YES : Replace the PCM. Then confirm that the malfunction
symptom is eliminated.
NO : Repair it. Then confirm that the malfunction symptom
is eliminated.
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
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-1080
STEP 8. Check for harness damage between ignition coil
connector and PCM connector.
a. Check the harness wire between ignition coil connector
B-101 (terminal No. 3) and PCM connector B-23 (terminal
No. 151) at ignition coil 1.
b. Check the harness wire between ignition coil connector
B-118 (terminal No. 3) and PCM connector B-23 (terminal
No. 143) at ignition coil 2.
c. Check the harness wire between ignition coil connector
B-102 (terminal No. 3) and PCM connector B-23 (terminal
No. 150) at ignition coil 3.
d. Check the harness wire between ignition coil connector
B-117 (terminal No. 3) and PCM connector B-23 (terminal
No. 148) at ignition coil 4.
Q: Is the harness wire in good condition?
YES : Replace the PCM. Then confirm that the malfunction
symptom is eliminated.
NO : Repair it. Then confirm that the malfunction symptom
is eliminated.
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
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-1081
INSPECTION PROCEDURE 32: A/C system.
.
COMMENT
• When the A/C is "ON" the PCM turns "ON" the
power transistor in the PCM. The PCM delays
A/C engagement momentarily while it increases
idle r/min. Then the A/C compressor clutch relay
coil will be energized.
With this, the A/C compressor clutch relay turns
"ON", and the A/C compressor clutch operates.
.
TROUBLESHOOTING HINTS (The most
likely causes for this case: )
• Malfunction of the A/C control system.
• Improper connector contact, open circuit or
shorted harness wire.
• Malfunction of the PCM.
52
51
53 54 55 56
57
58 59 60 61 62
63
64 65 66 67 68 69
70
71 72 73 74 75
76
77 78 79 80 81 82
83
AK303939
GREEN
81
POWERTRAIN CONTROL
MODULE (PCM)
A/C COMPRESSOR CLUTCH RELAY
A/C Circuit
B-21
AK303119
CONNECTOR: B-21
PCM
AB
AIR CLEANER
B-21
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