Mitsubishi Galant 9G. Manual — part 679
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>
13A-158
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: 30
± 9 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.
AK303815
1
2
AB
CONNECTOR: B-104
B-104 (B)
HARNESS
CONNECTOR:
COMPONENT SIDE
AKX01622
AKX01623 AB
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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>
13A-159
13A
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
AK303817AB
CONNECTOR: B-06
B-06 (B)
THROTTLE
ACTUATOR
CONTROL
MOTOR
THROTTLE
POSITION
SENSOR
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) <2.4L ENGINE>
13A-160
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
.
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>
13A-161
DTC SET CONDITIONS
Logic Flow Chart
.
Check Condition
• Ignition switch is "ON" position.
Judgement Criteria
• Throttle position sensor (main) output voltage
should be 0.35 volt or less for 0.5 second.
.
OBD-II DRIVE CYCLE PATTERN
None.
.
TROUBLESHOOTING HINTS (The most
likely causes for this code to be set are:)
• Throttle position sensor failed.
• Open or shorted throttle position sensor (main)
circuit, harness damage, or connector damage.
• PCM failed.
START
YES
YES
YES
NO
NO
NO
CONTINUOUS
FAILURE FOR 0.5sec
MALFUNCTION
END
GOOD
OUTPUT VOLTAGE
< =0.35V
OUTPUT VOLTAGE > =4.8V
AK302016
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