Mitsubishi Galant (2004+). Manual — part 1301
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>
13B-897
STEP 9. Check for harness damage between accelerator
pedal position sensor connector C-24 (terminal No. 3) and
PCM connector B-20 (terminal No. 26).
Q: Is the harness wire in good condition?
YES : Go to Step 10.
NO : Repair it. Then go to Step 11.
STEP 10. Replace the accelerator pedal position sensor.
(1) Replace the accelerator pedal position sensor.
(2) Turn the ignition switch to the "ON" position.
(3) After the DTC has been deleted, read the DTC again.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is DTC P2122 set?
YES : Replace the PCM. Then go to Step 11.
NO : The procedure is complete.
AK303202
1
6 5 4 3 2
ACCELERATOR
PERAL
AB
CONNECTOR: C-24
C-24 (B)
ACCELERATOR
PEDAL POSITION
SENSOR
HARNESS
CONNECTOR:
COMPONENT SIDE
AK303092
25
21
24 23 22
29 28 27 26
34 33 32 31 30
38 37 36 35
43 42 41 40 39
CONNECTOR: B-20
B-20
PCM
AB
HARNESS CONNECTOR:
COMPONENT SIDE
AIR CLEANER
AK303202
1
6 5 4 3 2
ACCELERATOR
PERAL
AB
CONNECTOR: C-24
C-24 (B)
ACCELERATOR
PEDAL POSITION
SENSOR
HARNESS
CONNECTOR:
COMPONENT SIDE
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>
13B-898
STEP 11. Using scan tool MB991958, read the diagnostic
trouble code (DTC).
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) After the DTC has been deleted, read the DTC again.
(4) Turn the ignition switch to the "LOCK"(OFF) position.
Q: Is DTC P2122 set?
YES : Retry the troubleshooting.
NO : The inspection is complete.
AC305412
AB
MB991910
DATA LINK
CONNECTOR
MB991824
MB991827
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>
13B-899
DTC P2123: Accelerator Pedal Position Sensor (main) Circuit High Input
CAUTION
If DTC P2123 has been set, TCL related DTC
U1120 and U1400 are also set. After P2123 has
been diagnosed, don't forget to erase DTC U1120
and U1400.
.
AK302872
YELLO
W
-GREEN
GRA
Y
BR
O
WN-WHITE
C-24
5 V
30
1
ACCELERATOR PEDAL
POSITION SENSOR
(MAIN)
POWERTRAIN CONTROL
MODULE (PCM)
26
31
3
2
Accelerator Pedal Position Sensor (main) Circuit
B-20
22
21
23 24 25
26 27 28 29
30 31 32 33 34
35 36 37 38
39 40 41 42 43
6
1 2 3 4 5
HALL IC
AK303201
ACCELERATOR
PERAL
AB
CONNECTOR: C-24
C-24 (B)
ACCELERATOR
PEDAL POSITION
SENSOR
AK303085
CONNECTOR: B-20
PCM
AB
AIR CLEANER
B-20
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>
13B-900
CIRCUIT OPERATION
• A 5-volt power supply is applied on the accelera-
tor pedal position sensor (main) power terminal
(terminal No. 1) from the PCM (terminal No. 30).
The ground terminal (terminal No. 2) is grounded
with PCM (terminal No. 31).
.
TECHNICAL DESCRIPTION
• The accelerator pedal position sensor (main) out-
puts voltage which corresponds to the accelera-
tor pedal depression.
• The PCM checks whether the voltage is within a
specified range.
.
DESCRIPTIONS OF MONITOR METHODS
Accelerator pedal position sensor (main) output volt-
age 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
.
DTC SET CONDITIONS
Logic Flow Chart
.
START
END
NO
NO
YES
YES
YES
NO
MALFUNCTION
GOOD
CONTINUOUS
FAILURE FOR 0.3sec
OUTPUT VOLTAGE > =4.8V
MONITORING
CONDITIONS
AK302414
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