Mitsubishi Galant 9G. Manual — part 965
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>
13B-160
STEP 9. Check for open circuit between engine coolant
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 11.
NO : Repair it. Then go to Step 11.
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-161
STEP 10. 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 : Replace the PCM. Then go to Step 11.
NO : Replace the engine coolant temperature sensor. Then
go to Step 11.
STEP 11. 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 P0118 set?
YES : Retry the troubleshooting.
NO : The inspection is complete.
1
2
AK303037
HARNESS
CONNECTOR:
COMPONENT SIDE
CONNECTOR: B-104
AB
B-104 (B)
THROTTLE
BODY
AKX01622
AKX01623 AB
NEXT>>
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>
13B-162
13B
DTC P0122: Throttle Position Sensor (Main) Circuit Low Input
CAUTION
If DTC P0122 has been set, TCL related DTC
U1120 is also set. After P0122 has been diag-
nosed, don't forget to erase DTC U1120.
.
6
1 2 3 4 5
100
99
92
91
93 94 95
96 97 98
101 102 103 104
105 106 107 108
109 110 111 112 113
AK400878
YELLO
W
-RED
WHITE-RED
BLA
CK-WHITE
B-06
94
5
THROTTLE POSITION
SENSOR (MAIN)
HALL IC
POWERTRAIN
CONTROL
MODULE (PCM)
98
95
6
3
Throttle Position Sensor (main) Circuit
B-22
5 V
AK303042
THROTTLE BODY ASSEMBLY
(INCORPORATING THROTTLE
POSITION SENSOR)
B-06 (B)
CONNECTOR: B-06
AB
AK303043
CONNECTOR: B-22
B-22 (B)
PCM
AB
AIR CLEANER
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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>
13B-163
CIRCUIT OPERATION
• A 5-volt power supply is applied on the throttle
position sensor (main) power terminal (terminal
No. 5) from the PCM (terminal No. 94).
The ground terminal (terminal No. 3) is grounded
with PCM (terminal No. 95).
.
TECHNICAL DESCRIPTION
• The throttle position sensor (main) outputs volt-
age which corresponds to the throttle valve open-
ing angle.
• The PCM checks whether the voltage is within a
specified range.
.
DESCRIPTIONS OF MONITOR METHODS
Throttle position sensor (main) output voltage is out
of specified range.
.
MONITOR EXECUTION
Continuous
.
MONITOR EXECUTION CONDITIONS
(Other monitor and Sensor)
Other Monitor (There is no temporary DTC stored
in memory for the item monitored below)
• Not applicable
Sensor (The sensor below is determined to be
normal)
• Not applicable
.
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