Mitsubishi Galant. Manual — part 207

MULTIPORT FUEL INJECTION(MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-53

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(

P.00E-2

). 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) <3.0L>

13B-54

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(

P.00E-2

). 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) <3.0L>

13B-55

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(

P.00E-2

). 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(

P.00E-2

). 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

P.13B-4

, 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

MULTIPORT FUEL INJECTION(MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-56

DTC P0111: Intake air temperature Circuit Range/Performance Problem

CIRCUIT OPERATION

•

Approximately 5 volts are applied to the intake air
temperature sensor output terminal (terminal 6)
from the PCM (terminal 64) via the resistor in the
PCM. The ground terminal (terminal 5) is
grounded with PCM (terminal 57).

•

The intake air temperature sensor is a negative
temperature coefficient type of resistor. When the
intake air temperature rises, the resistance
decreases.

•

The intake air temperature sensor output voltage
increases when the resistance increases and
decreases when the resistance decreases.

AK000498

2 3

7

4 5 6

1

BLA

CK

RED-BLUE

57

64

B-14

INTAKE AIR TEMPERATURE SENSOR
(INCORPORATED IN VOLUME AIR
FLOW SENSOR)

POWERTRAIN CONTROL
MODULE(PCM)

5

6

5V

C-40
(MU803781)

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

AG

INTAKE AIR
TEMPERATURE
SENSOR

AK000280

CONNECTOR : C-40

PCM

AV