Mitsubishi Galant. Manual — part 90
MULTIPORT FUEL INJECTION(MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L>
13A-41
DTC P0107: Barometric Pressure Circuit Low Input
CIRCUIT OPERATION
•
A 5-volt voltage is supplied to the barometric
pressure sensor power terminal (terminal 1) from
the PCM (terminal 46). The ground terminal
(terminal 5) is grounded with PCM (terminal 57).
•
A voltage that is proportional to the atmospheric
pressure is sent to the PCM (terminal 55) from
the barometric pressure sensor output terminal
(terminal 2).
AK000460
7
4 5 6
1 2 3
GREEN-
YELL
OW
GREEN-
WHITE
BL
ACK
C-40
(MU803781)
POWERTRAIN CONTROL
MODULE(PCM)
46
5V
55
57
B-14
BAROMETRIC PRESSURE SENSOR
(INCORPORATED IN VOLUME AIR
FLOW SENSOR)
1
2
5
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
ACX02480
CONNECTOR : B-14
AF
BAROMETRIC
PRESSURE
SENSOR
AK000280
CONNECTOR : C-40
PCM
AV
MULTIPORT FUEL INJECTION(MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L>
13A-42
TECHNICAL DESCRIPTION
•
The barometric pressure sensor outputs a
voltage which corresponds to the barometric
pressure.
•
The PCM checks whether this voltage is within a
specified range.
DTC SET CONDITIONS
Check Conditions
•
Two seconds or more have passed since the
starting sequence was completed.
•
Battery positive voltage is higher than 8 volts.
Judgement Criteria
•
Barometric pressure sensor output voltage has
continued to be 1.95 volts or lower
[corresponding to a barometric pressure of 50
kPa (7.3 psi) or lower] approximately 15,000 ft
above sea level for 10 seconds.
TROUBLESHOOTING HINTS (The most likely
causes for this code to be set are:)
•
Barometric pressure sensor failed.
•
Open or shorted barometric pressure sensor
circuit, or loose connector.
•
PCM failed.
DIAGNOSIS
Required Special Tools
MB991502: Scan Tool (MUT-II)
STEP 1. Using scan tool MB991502, check data list item 25:
Barometric Pressure Sensor.
CAUTION
To prevent damage to scan tool MB991502, always turn the
ignition switch to the "LOCK" (OFF) position before
connecting or disconnecting scan tool MB991502.
(1) Connect scan tool MB991502 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Set scan tool MB991502 to the data reading mode for item
25, Barometric Pressure Sensor.
•
When altitude is 0 m(0 foot), 101 kPa.
•
When altitude is 600 m(1,969 feet), 95 kPa.
•
When altitude is 1,200 m(3,937 feet), 88 kPa.
•
When altitude is 1,800 m(5,906 feet), 81 kPa.
(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 : NO: Go to Step 2.
AC003081 AB
16 PIN
MB991502
MULTIPORT FUEL INJECTION(MFI) DIAGNOSIS
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MULTIPORT FUEL INJECTION (MFI) <2.4L>
13A-43
STEP 2. Check the sensor output voltage at barometric
pressure sensor connector B-14 by backprobing.
(1) Do not disconnect the connector B-14.
(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between terminal 2 and ground by
backprobing.
•
When altitude is 0 m(0 foot), voltage should be 3.7 and
4.3 volts.
•
When altitude is 600 m(1,969 feet), voltage should be
3.4 and 4.0 volts.
•
When altitude is 1,200 m(3,937 feet), voltage should be
3.2 and 3.8 volts.
•
When altitude is 1,800 m(5,906 feet), voltage should be
2.9 and 3.5 volts.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the voltage normal?
YES : Go to Step 3.
NO : Go to Step 7.
STEP 3. Check the sensor output voltage at PCM
connector C-40 by backprobing.
(1) Do not disconnect the connector C-40.
(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between terminal 55 and ground by
backprobing.
•
When altitude is 0 m(0 foot), voltage should be 3.7 and
4.3 volts.
•
When altitude is 600 m(1,969 feet), voltage should be
3.4 and 4.0 volts.
•
When altitude is 1,200 m(3,937 feet), voltage should be
3.2 and 3.8 volts.
•
When altitude is 1,800 m(5,906 feet), voltage should be
2.9 and 3.5 volts.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the voltage normal?
YES : Go to Step 4.
NO : Go to Step 6.
AKX01520AC
B-14 CONNECTOR
HARNESS
SIDE VIEW
1 2 3 4 5 6 7
AK000282
C-40 CONNECTOR
HARNESS SIDE VIEW
46
57
66
45
56
65
44
55
43
49
54
64
42
48
59
41
47
58
53
63
52
62
51
61
50
60
AC
MULTIPORT FUEL INJECTION(MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L>
13A-44
STEP 4. Check connector B-14 at the barometric pressure
sensor and connector C-40 at PCM for damage.
Q: Is the connector in good condition?
YES : Go to Step 5.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection(
). Then go to Step 18.
STEP 5. Using scan tool MB991502, check data list item 25:
Barometric Pressure Sensor.
CAUTION
To prevent damage to scan tool MB991502, always turn the
ignition switch to the "LOCK" (OFF) position before
connecting or disconnecting scan tool MB991502.
(1) Connect scan tool MB991502 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Set scan tool MB991502 to the data reading mode for item
25, Barometric Pressure Sensor.
•
When altitude is 0 m(0 foot), 101 kPa.
•
When altitude is 600 m(1,969 feet), 95 kPa.
•
When altitude is 1,200 m(3,937 feet), 88 kPa.
•
When altitude is 1,800 m(5,906 feet), 81 kPa.
(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 ECM or PCM. Then go to Step 18.
ACX02480
CONNECTOR : B-14
AF
BAROMETRIC
PRESSURE
SENSOR
AK000280
CONNECTOR : C-40
PCM
AV
AC003081 AB
16 PIN
MB991502
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