Mitsubishi Galant 9G. Manual — part 871
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>
13A-926
STEP 7. 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 0.435 and 1.035 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
− How to
Cope with Intermittent Malfunctions
.
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 P2128 set?
YES : Retry the troubleshooting.
NO : The inspection is complete.
AK303804AB
MB991910
DATA LINK
CONNECTOR
MB991824
MB991827
AK303804AB
MB991910
DATA LINK
CONNECTOR
MB991824
MB991827
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>
13A-927
DTC P2135: Throttle Position Sensor (main and sub) Range/Performance Problem
CAUTION
If DTC P2135 has been set, TCL related DTC
U1120 is also set. After P2135 has been diag-
nosed, don't forget to erase DTC U1120.
.
THROTTLE POSITION SENSOR (MAIN
AND SUB) RANGE/PERFORMANCE
PROBLEM CIRCUIT
• Refer to DTC P0122 − Throttle Position Sensor
.
• Refer to DTC P0222 − Throttle Position Sensor
.
.
CIRCUIT OPERATION
• Refer to DTC P0122 − Throttle Position Sensor
.
• Refer to DTC P0222 − Throttle Position Sensor
.
.
TECHNICAL DESCRIPTION
• PCM checks the throttle position sensor output
signal characteristics for abnormal conditions.
.
DESCRIPTIONS OF MONITOR METHODS
Detect malfunction if the relation between throttle
position sensor (main) and throttle position sen-
sor (sub) is wrong.
.
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
• Mass airflow sensor
.
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>
13A-928
DTC SET CONDITIONS <Range/Performance problem-relation between main and
sub>
Logic Flow Chart
Check Conditions
• Ignition switch is "ON" position.
• Throttle position sensor (main) output voltage is
between 0.35 and 2.5 volts.
• Throttle position sensor (sub) output voltage is
between 2.25 and 4.8 volts.
Judgement Criteria
• Voltage obtained with the formula given below is
0.3 volt or higher for 0.5 second: throttle position
sensor (main) output voltage
− [throttle position
sensor (sub) output voltage
− 2 volts]
START
END
NO
NO
NO
YES
YES
YES
MALFUNCTION
GOOD
CONTINUOUS
FAILURE FOR 0.5sec
|
TPS (MAIN) - (TPS (SUB)-2.0V)
|
> =0.3V
MONITORING
CONDITIONS
AK302047
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>
13A-929
Logic Flow Chart
Check Conditions
• Ignition switch is "ON" position.
• Throttle position sensor (main) output voltage is
between 2.5 and 4.8 volts.
• Throttle position sensor (sub) output voltage is
higher than 2.25 volts.
Judgement Criteria
• Throttle position sensor (sub) output voltage is
4.2 volts or lower.
.
OBD-II DRIVE CYCLE PATTERN
Refer to Diagnostic Function
− OBD-II Drive Cycle −
Procedure 6
.
.
TROUBLESHOOTING HINTS (The most
likely causes for this code to be set are:)
• Throttle position sensor failed.
• Shorted throttle position sensor circuit or connec-
tor damage.
• PCM failed.
START
END
NO
NO
NO
YES
YES
YES
MALFUNCTION
GOOD
CONTINUOUS
FAILURE FOR 0.5sec
TPS (SUB) < =4.2V
MONITORING
CONDITIONS
AK302048
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