Mitsubishi Galant (2004+). Manual — part 1303
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>
13B-905
STEP 7. Using scan tool MB991958, check data list item 78:
Accelerator Pedal Position Sensor (main).
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
78, Accelerator Pedal Position Sensor (main).
• Output voltage is between 0.7 and 1.3 volts when foot is
released from accelerator pedal.
• Output voltage is 4.0 volts or higher when accelerator
pedal is fully depressed.
(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 : Replace the PCM. Then go to Step 8.
STEP 8. Using scan tool MB991958, read the diagnostic
trouble code (DTC).
(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 P2123 set?
YES : Retry the troubleshooting.
NO : The inspection is complete.
AC305412
AB
MB991910
DATA LINK
CONNECTOR
MB991824
MB991827
AC305412
AB
MB991910
DATA LINK
CONNECTOR
MB991824
MB991827
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>
13B-906
DTC P2127: Accelerator Pedal Position Sensor (sub) Circuit Low Input
CAUTION
If DTC P2127 has been set, TCL related DTC
U1120 is also set. After P2127 has been diag-
nosed, don't forget to erase DTC U1120.
.
AK302873
YELLO
W
-RED
PINK-GREEN
BR
O
W
N
5 V
21
4
ACCELERATOR PEDAL
POSITION SENSOR (SUB)
HALL IC
POWERTRAIN CONTROL
MODULE (PCM)
27
22
6
5
Accelerator Pedal Position Sensor (sub) Circuit
B-20
C-24
6
1 2 3 4 5
22
21
23 24 25
26 27 28 29
30 31 32 33 34
35 36 37 38
39 40 41 42 43
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-907
CIRCUIT OPERATION
• A 5-volt power supply is applied on the accelera-
tor pedal position sensor (sub) power terminal
(terminal No. 4) from the PCM (terminal No. 21).
The ground terminal (terminal No. 5) is grounded
with PCM (terminal No. 22).
.
TECHNICAL DESCRIPTION
• The accelerator pedal position sensor (sub) 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 (sub) 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
MALFUNCTION
GOOD
CONTINUOUS
FAILURE FOR 0.3sec
OUTPUT VOLTAGE < 0.2V
AK302412
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>
13B-908
Check Conditions
• Ignition switch is "ON" position.
Judgement Criteria
• Accelerator pedal position sensor (sub) output
voltage is 0.2 volt or less for 0.3 second.
.
OBD-II DRIVE CYCLE PATTERN
None.
.
TROUBLESHOOTING HINTS (The most likely
causes for this code to be set are:)
• Accelerator pedal position sensor failed.
• Open or shorted accelerator pedal position sen-
sor (sub) circuit, harness damage or connector
damage.
• PCM failed.
DIAGNOSIS
Required Special Tools:
• MB991958: Scan tool (MUT-III Sub Assembly)
• MB991824: V.C.I.
• MB991827: USB Cable
• MB991910: Main Harness A
STEP 1. Using scan tool MB991958, check data list item 77:
Accelerator Pedal Position Sensor (sub).
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
77, Accelerator Pedal Position Sensor (sub).
• Output voltage is between 0.4 and 1.0 volts when foot is
released from accelerator pedal.
• Output voltage is 3.7 volts or higher when accelerator
pedal is fully depressed.
(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.
AC305412
AB
MB991910
DATA LINK
CONNECTOR
MB991824
MB991827
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