Mitsubishi Galant. Manual — part 93
MULTIPORT FUEL INJECTION(MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L>
13A-53
STEP 3. 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 4.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection(
). Then go to Step 12.
STEP 4. 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 PCM. Then go to Step 12.
ACX02480
CONNECTOR : B-14
AF
BAROMETRIC
PRESSURE
SENSOR
AK000280
CONNECTOR : C-40
PCM
AV
AC003081 AB
16 PIN
MB991502
MULTIPORT FUEL INJECTION(MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L>
13A-54
STEP 5. Check the sensor supply 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 1 and ground by
backprobing.
•
Voltage should be between 4.8 and 5.2 volts.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the voltage normal?
YES : Go to Step 7.
NO : Go to Step 6.
STEP 6. Check connector C-40 at PCM for damage.
Q: Is the connector in good condition?
YES : Replace the PCM. Then go to Step 12.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection(
). Then go to Step 12.
STEP 7. Check the ground 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 5 and ground by
backprobing.
•
Voltage should be 0.5 volt or less.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the voltage normal?
YES : Go to Step 10.
NO : Go to Step 8.
AKX01521AC
B-14 CONNECTOR
HARNESS
SIDE VIEW
1 2 3 4 5 6 7
AK000280
CONNECTOR : C-40
PCM
AV
AKX01517
B-14 CONNECTOR
HARNESS
SIDE VIEW
1 2 3 4 5 6 7
AC
MULTIPORT FUEL INJECTION(MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L>
13A-55
STEP 8. 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 9.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection(
). Then go to Step 12.
STEP 9. Check for open circuit between barometric
pressure sensor connector B-14 terminal 5 and PCM
connector C-40 terminal 57.
Q: Is the harness wire in good condition?
YES : Replace the PCM. Then go to Step 12.
NO : Repair it. Then go to Step 12.
ACX02480
CONNECTOR : B-14
AF
BAROMETRIC
PRESSURE
SENSOR
AK000280
CONNECTOR : C-40
PCM
AV
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-56
STEP 10. Check connector B-14 at barometric pressure
sensor for damage.
Q: Is the connector in good condition?
YES : Go to Step 11.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection(
). Then go to Step 12.
STEP 11. Check connector C-40 at PCM for damage.
Q: Is the connector in good condition?
YES : Replace the volume air flow sensor. Then go to Step
12.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection(
). Then go to Step 12.
STEP 12. Test the OBD-II drive cycle.
(1) Carry out a test drive with the drive cycle pattern. Refer to,
Procedure 6
−
Other Monitor(
(2) Check the diagnostic trouble code (DTC).
Q: Is the DTC P0108 is output?
YES : Retry the troubleshooting.
NO : The inspection is complete.
ACX02480
CONNECTOR : B-14
AF
BAROMETRIC
PRESSURE
SENSOR
AK000280
CONNECTOR : C-40
PCM
AV
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