Mitsubishi Galant. Manual — part 91

MULTIPORT FUEL INJECTION(MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-45

STEP 6. 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 : Repair harness wire between barometric pressure

sensor connector B-14 terminal 2 and PCM connector
C-40 terminal 55 because of open circuit or harness
damage. Then go to Step 18.

NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection(

P.00E-2

). Then go to Step 18.

STEP 7. 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 12.
NO : Go to Step 8.

STEP 8. Check the sensor supply 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 46 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 9.
NO : Go to Step 10.

ACX02480

CONNECTOR : B-14

AF

BAROMETRIC
PRESSURE
SENSOR

AK000280

CONNECTOR : C-40

PCM

AV

AKX01521AC

B-14 CONNECTOR
HARNESS
SIDE VIEW

1 2 3 4 5 6 7

AK000284

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-46

STEP 9. 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 : Repair harness wire between barometric pressure

sensor connector B-14 terminal 1 and PCM connector
C-40 terminal 46 because of open circuit or harness
damage. Then go to Step 18.

NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection(

P.00E-2

). Then go to Step 18.

STEP 10. 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 11.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection(

P.00E-2

). Then go to Step 18.

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-47

STEP 11. Check for short circuit to ground between
barometric pressure sensor connector B-14 terminal 1 and
PCM connector C-40 terminal 46.
Q: Is the harness wire in good condition?

YES : Replace the PCM. Then go to Step 18.
NO : Repair it. Then go to Step 18.

STEP 12. 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 15.
NO : Go to Step 13.

ACX02480

CONNECTOR : B-14

AF

BAROMETRIC
PRESSURE
SENSOR

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-48

STEP 13. 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 14.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection(

P.00E-2

). Then go to Step 18.

STEP 14. Check for harness damage 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 18.
NO : Repair it. Then go to Step 18.

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