Mitsubishi Galant 9G. Manual — part 972
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>
13B-188
STEP 8. Check the continuity at engine coolant
temperature sensor harness side connector B-104.
(1) Disconnect the connector B-104 and measure at the
harness side.
(2) Check for the continuity between terminal No. 2 and
ground.
• Should be less than 2 ohms.
Q: Does continuity exist?
YES : Go to Step 11.
NO : Go to Step 9.
STEP 9. Check harness connector B-21 at PCM for
damage.
Q: Is the harness connector in good condition?
YES : Go to Step 10.
NO : Repair or replace it. Refer to GROUP 00E, Harness
. Then go to Step 14.
1
2
AK303037
HARNESS
CONNECTOR:
COMPONENT SIDE
CONNECTOR: B-104
AB
B-104 (B)
THROTTLE
BODY
AK303040
B-104 HARNESS
CONNECTOR:
COMPONENT SIDE
1
2
AB
AK303018
55
56
54 53 52 51
57
62 61 60 59 58
63
69 68 67 66 65 64
70
75 74 73 72 71
76
82 81 80 79 78 77
83
CONNECTOR: B-21
PCM
AB
HARNESS CONNECTOR:
COMPONENT SIDE
AIR CLEANER
B-21 (B)
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>
13B-189
STEP 10. Check for harness damage between engine
coolant temperature sensor connector B-104 (terminal No.
2) and PCM connector B-21 (terminal No. 69).
Q: Is the harness wire in good condition?
YES : Replace the PCM. Then go to Step 14.
NO : Repair it. Then go to Step 14.
1
2
AK303037
HARNESS
CONNECTOR:
COMPONENT SIDE
CONNECTOR: B-104
AB
B-104 (B)
THROTTLE
BODY
AK303018
55
56
54 53 52 51
57
62 61 60 59 58
63
69 68 67 66 65 64
70
75 74 73 72 71
76
82 81 80 79 78 77
83
CONNECTOR: B-21
PCM
AB
HARNESS CONNECTOR:
COMPONENT SIDE
AIR CLEANER
B-21 (B)
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>
13B-190
STEP 11. Check the engine coolant temperature sensor.
(1) Disconnect the engine coolant temperature sensor
connector B-104.
(2) Remove the engine coolant temperature sensor.
(3) With the temperature sensing portion of engine coolant
temperature sensor immersed in hot water, check
resistance.
Standard value:
14
− 17 kΩ [at −20°C (−4°F)]
5.1
− 6.5 kΩ [at 0°C (32°F)]
2.1
− 2.7 kΩ [at 20°C (68°F)]
0.9
− 1.3 kΩ [at 40°C (104°F)]
0.48
− 0.68 kΩ [at 60°C (140°F)]
0.26
− 0.36 kΩ [at 80°C (176°F)]
(4) Apply 3M
AAD part number 8731 or equivalent on the
screw section of the engine coolant temperature sensor.
(5) Install the engine coolant temperature sensor, and tighten
to the specified torque.
Tightening torque: 29
± 10 N⋅m (22 ± 7 ft-lb)
Q: Is the measured resistance at the standard value?
YES : Go to Step 12.
NO : Replace the engine coolant temperature sensor. Then
go to Step 14.
1
2
AK303037
HARNESS
CONNECTOR:
COMPONENT SIDE
CONNECTOR: B-104
AB
B-104 (B)
THROTTLE
BODY
AKX01622
AKX01623 AB
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>
13B-191
STEP 12. Check harness connector B-22 at PCM 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
. Then go to Step 14.
AK303016
104
96
94
95
93 92 91
99 98 97
103 102 101 100
108 107 106 105
113 112 111 110 109
CONNECTOR: B-22
B-22 (B)
PCM
AB
HARNESS CONNECTOR:
COMPONENT SIDE
AIR CLEANER
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