Mitsubishi Galant 9G. Manual — part 876
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>
13A-946
STEP 14. Check for harness damage between accelerator
pedal position sensor connector C-24 (terminal No. 6) and
PCM connector B-20 (terminal No. 27).
Q: Is the harness wire in good condition?
YES : Go to Step 15.
NO : Repair it. Then go to Step 16.
STEP 15. 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 P2138 set?
YES : Replace the PCM. Then go to Step 16.
NO : The inspection is complete.
AK303906
1
6 5 4 3 2
AB
C-24 (B)
CONNECTOR: C-24
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
AK303906
1
6 5 4 3 2
AB
C-24 (B)
CONNECTOR: C-24
HARNESS CONNECTOR:
COMPONENT SIDE
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>
13A-947
STEP 16. 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 P2138 set?
YES : Retry the troubleshooting.
NO : The inspection is complete.
DTC P2228: Barometric Pressure Circuit Low Input
CAUTION
If DTC P2228 has been set, TCL related DTC
U1120 is also set. After P2228 has been diag-
nosed, don't forget to erase DTC U1120.
.
TECHNICAL DESCRIPTION
• The barometric pressure sensor outputs a volt-
age which corresponds to the barometric pres-
sure.
• The PCM checks whether this voltage is within a
specified range.
.
DESCRIPTIONS OF MONITOR METHODS
Barometric pressure sensor output voltage is out of
reasonable barometric pressure 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
.
AK303804AB
MB991910
DATA LINK
CONNECTOR
MB991824
MB991827
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>
13A-948
DTC SET CONDITIONS
Logic Flow Chart
Check Conditions
• 2 seconds or more have passed since the engine
starting sequence was completed.
• Battery positive voltage is higher than 8 volts.
Judgement Criteria
• Barometric pressure sensor output signal has
continued to be 49 kPa (14.5 in.Hg) or lower
(approximately 15,000 ft above sea level) for 10
seconds.
.
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:)
• PCM failed.
DIAGNOSIS
Required Special Tools:
• MB991958: Scan Tool (MUT-III Sub Assembly)
• MB991824: V.C.I.
• MB991827: USB Cable
• MB991910: Main Harness A
START
END
NO
NO
NO
YES
YES
YES
MALFUNCTION
GOOD
NO
YES
AK401684
MONITORING
CONDITIONS
BAROMETRIC PRESSURE
< 49kPa (14.5in.Hg)
CONTINUOUS
FAILURE FOR
10secs
BAROMETRIC PRESSURE
> 113kPa (33.4in.Hg)
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
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MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>
13A-949
STEP 1. Using scan tool MB991958, check data list item 25:
Barometric Pressure 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
25, Barometric Pressure Sensor.
• When altitude is 0 m (0 foot), 101 kPa (29.8 In.Hg).
• When altitude is 600 m (1,969 feet), 95 kPa (28.1
In.Hg).
• When altitude is 1,200 m (3,937 feet), 88 kPa (26.0
In.Hg).
• When altitude is 1,800 m (5,906 feet), 81 kPa (23.9
In.Hg).
(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 2.
STEP 2. 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 P2228 set?
YES : Retry the troubleshooting.
NO : The inspection is complete.
DTC P2229: Barometric Pressure Circuit High Input
CAUTION
If DTC P2229 has been set, TCL related DTC
U1120 is also set. After P2229 has been diag-
nosed, don't forget to erase DTC U1120.
.
TECHNICAL DESCRIPTION
• The barometric pressure sensor outputs a volt-
age which corresponds to the barometric pres-
sure.
• The PCM checks whether this voltage is within a
specified range.
.
DESCRIPTIONS OF MONITOR METHODS
Barometric pressure sensor output voltage is out of
reasonable barometric pressure 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
.
AK303804AB
MB991910
DATA LINK
CONNECTOR
MB991824
MB991827
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