Mitsubishi Eclipse. Manual — part 174
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L>
13A-189
DTC P0123: Throttle Position Sensor Circuit High Input
AK000656
2 3 4
1
98
78
71
88 89
76 77
72
79
91
73
80
74
75
81
92
8283
93
8485
94
8687
9596
90
97
GREEN-
YELL
OW
YELL
OW
YELL
O
W
BL
ACK
ENGINE CONTROL
MODULE (ECM) <M/T>
OR
POWERTRAIN CONTROL
MODULE (PCM) <A/T>
92 <M/T>
57 <A/T>*1
84 <M/T>
78 <A/T>*2
81 <M/T>
46 <A/T>*1
5V
C-60 <M/T>
(MU803772)
C-54 <A/T>
(MU803781)
C-57 <A/T>
(MU803782)
AUTO-CRUISE
CONTROL SYSTEM
B-07
(MU802724)
THROTTLE POSITION
SENSOR
NOTE
*1:PCM connector C-54 <A/T>
*2:PCM connector C-57 <A/T>
4
3
1
82
78
81
80
89 90 91 92
79
87
71
74
73
72
76
75
77
85
88
83 84
86
42 43
48 49 50 51 52 53 54 55 56 57
46
45
44
58 59
60 61 62 63
64 65 66
47
41
Throttle Position Sensor (TPS) Circuit
AK300050
CONNECTOR: B-07
THROTTLE
POSITION
SENSOR
AB
B-07 (B)
AK300060
ECM
CONNECTOR: C-60 <M/T>
AE
C-60 (G)
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L>
13A-190
.
CIRCUIT OPERATION
• A 5-volt power supply is applied on the throttle
position sensor power terminal (terminal No. 4)
from the ECM (terminal No. 81) <M/T> or PCM
(terminal No. 46) <A/T>.
The ground terminal (terminal No. 1) is grounded
with ECM (terminal No. 92) <M/T> or PCM (termi-
nal No. 57) <A/T>.
• When the throttle valve shaft is turned from the
idle position to the fully opened position, the
resistor between the throttle position sensor out-
put terminal (terminal No. 3) and ground terminal
will increase according to the rotation.
.
TECHNICAL DESCRIPTION
• The throttle position sensor outputs voltage which
corresponds to the throttle valve opening angle.
• The ECM <M/T> or PCM <A/T> checks whether
the voltage is within a specified range. In addi-
tion, it checks that the voltage output does not
become too high while the engine is at idle.
.
DESCRIPTIONS OF MONITOR METHODS
Throttle position sensor output voltage is out of spec-
ified 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
.
AK300060
PCM
CONNECTORS: C-54, C-57 <A/T>
AI
C-57 (GR)
C-54 (GR)
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L>
13A-191
DTC SET CONDITIONS
Logic Flow Chart
.
Check Conditions
• 2 seconds or more have passed since the start-
ing sequence was completed.
• Engine speed is lower than 1,000 r/min.
• Volumetric efficiency is lower than 60 percent.
Judgement Criteria
• TPS output voltage has continued to be 2 volts or
higher for 2 seconds.
.
OBD-ll DRIVE CYCLE PATTERN
None.
.
TROUBLESHOOTING HINTS (The most likely
causes for this code to be set are: )
• Throttle position sensor failed.
• Open throttle position sensor circuit, or connector
damage.
• ECM failed. <M/T>
• PCM failed. <A/T>
DIAGNOSIS
Required Special Tools:
• MB991958 (MUT-III Sub Assembly)
• MB991824: V.C.I.
• MB991827: USB Cable
• MB991911: Main Harness B
START
END
NO
NO
YES
YES
MALFUNCTION
GOOD
CONTINUOUS
FAILURE FOR 2 secs
OUTPUT VOLTAGE
< 0.2V
NO
YES
MONITORING
CONDITIONS
AK301429
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L>
13A-192
STEP 1. Using scan tool MB991958, check data list item 14:
Throttle Position Sensor.
CAUTION
To prevent damage to scan tool MB991958, always turn the
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Set scan tool MB991958 to the data reading mode for item
14, Throttle Position Sensor.
• With the throttle valve in the idle position, voltage should
be between 0.535 and 0.735 volt.
• With the throttle valve in the full-open position, voltage
should be between 4.5 and 5.5 volts.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the sensor operating properly?
YES : It can be assumed that this malfunction is intermittent.
Refer to GROUP 00, How to Use
Troubleshooting/Inspection Service Points
NO : Go to Step 2.
STEP 2. Check connector B-07 at throttle position sensor
for damage.
Q: Is the connector in good condition?
YES : Go to Step 3.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection
. Then go to Step 8.
AK300810
AB
MB991911
16-PIN
MB991827
MB991824
AK300402
2 1
3
4
CONNECTOR: B-07
AB
B-07 (B)
HARNESS CONNECTOR:
COMPONENT SIDE
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