Mitsubishi Galant 9G. Manual — part 988
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>
13B-252
STEP 9. Check for harness damage between MFI relay
connector B-17X (terminal No. 4) and right bank heated
oxygen sensor (front) connector B-09 (terminal No. 1).
Q: Is the harness wire in good condition?
YES : Go to Step 10.
NO : Repair it. Then go to Step 12.
1
2
3
4
AK303017
CONNECTOR: B-17X
FRONT OF VEHICLE
B-17X
AB
HARNESS
CONNECTOR:
COMPONENT SIDE
RELAY BOX
1
2
3
4
AK303048
B-09 (B)
CONNECTOR: B-09
THROTTLE BODY
RIGHT BANK
HEATED OXYGEN
SENSOR (FRONT)
AB
HARNESS
CONNECTOR:
COMPONENT SIDE
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>
13B-253
STEP 10. Check for harness damage between right bank
heated oxygen sensor (front) connector B-09 (terminal No.
3) and PCM connector B-23 (terminal No. 126).
Q: Is the harness wire in good condition?
YES : Go to Step 11.
NO : Repair it. Then go to Step 12.
1
2
3
4
AK303048
B-09 (B)
CONNECTOR: B-09
THROTTLE BODY
RIGHT BANK
HEATED OXYGEN
SENSOR (FRONT)
AB
HARNESS
CONNECTOR:
COMPONENT SIDE
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) <3.8L ENGINE>
13B-254
STEP 11. Check the trouble symptoms.
(1) Carry out a test drive with the drive cycle pattern. Refer to
Diagnostic Function
− OBD-II Drive Cycle − Procedure 6 −
(2) Check the diagnostic trouble code (DTC).
Q: Is DTC P0135 set?
YES : Replace the PCM. Then go to Step 12.
NO : It can be assumed that this malfunction is intermittent.
Refer to GROUP 00, How to Use
Troubleshooting/Inspection Service Points
− How to
Cope with Intermittent Malfunctions
.
STEP 12. Test the OBD-II drive cycle.
(1) Carry out a test drive with the drive cycle pattern. Refer to
Diagnostic Function
− OBD-II Drive Cycle − Procedure 6 −
(2) Check the diagnostic trouble code (DTC).
Q: Is DTC P0135 set?
YES : Retry the troubleshooting.
NO : The inspection is complete.
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>
13B-255
DTC P0136: Heated Oxygen Sensor Circuit (bank 1, sensor 2)
YELLO
W
BLUE
BLA
C
K
BLA
CK
AK302842
TO PCM
FROM MFI RELAY
69
97
2
4
3
1
B-22
RIGHT BANK
HEATED OXYGEN
SENSOR (REAR)
POWERTRAIN CONTROL
MODULE (PCM)
4
3
1 2
B-08
MU802665
Right Bank Heated Oxygen Sensor (rear) Circuit
B-21
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
100
99
92
91
93 94 95
96 97 98
101 102 103 104
105 106 107 108
109 110 111 112 113
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