Mitsubishi Galant. Manual — part 209

MULTIPORT FUEL INJECTION(MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-61

STEP 11. Check for short circuit to ground between intake
air temperature sensor connector B-14 terminal 6 and PCM
connector C-40 terminal 64.
Q: Is the harness wire in good condition?

YES : Replace the PCM. Then go to Step 19.
NO : Repair it. Then go to Step 19.

STEP 12. Check the continuity at intake air temperature
sensor harness side connector B-14.
(1) Disconnect the connector B-14 and measure at the harness

side.

(2) Check for the continuity between terminal 5 and ground.

•

Should be less than 2 ohm.

Q: Is the continuity normal?

YES : Go to Step 15.
NO : Go to Step 13.

STEP 13. Check 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 19.

ACX02480

CONNECTOR : B-14

AG

INTAKE AIR
TEMPERATURE
SENSOR

AK000280

CONNECTOR : C-40

PCM

AV

AKX01409AC

B-14 HARNESS
SIDE CONNECTOR

7 6 5 4 3 2 1

AK000280

CONNECTOR : C-40

PCM

AV

MULTIPORT FUEL INJECTION(MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-62

STEP 14. Check for open circuit and harness damage
between intake air temperature 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 19.
NO : Repair it. Then go to Step 19.

ACX02480

CONNECTOR : B-14

AG

INTAKE AIR
TEMPERATURE
SENSOR

AK000280

CONNECTOR : C-40

PCM

AV

MULTIPORT FUEL INJECTION(MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-63

STEP 15. Check the intake air temperature sensor.
(1) Disconnect the intake air temperature sensor connector B-

14

(2) Measure the resistance between intake air temperature

sensor side connector terminal 5 and 6.

(3) Measure resistance while heating the sensor using a hair

drier.

Standard value:

5.3

−−−−

6.7 k

Ω

Ω

Ω

Ω

[at 0

°°°°

C (32

°°°°

F)]

2.3

−−−−

3.0 k

Ω

Ω

Ω

Ω

[at 20

°°°°

C (68

°°°°

F)]

1.0

−−−−

1.5 k

Ω

Ω

Ω

Ω

[at 40

°°°°

C (104

°°°°

F)]

0.30

−−−−

0.42 k

Ω

Ω

Ω

Ω

[at 80

°°°°

C (176

°°°°

F)]

Q: Is the resistance at the standard value?

YES : Go to Step 16.
NO : Replace the volume air flow sensor. Then go to Step

19.

STEP 16. Check connector C-40 at PCM for damage.
Q: Is the connector in good condition?

YES : Go to Step 17.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection(

P.00E-2

). Then go to Step 19.

ACX02480

CONNECTOR : B-14

AG

INTAKE AIR
TEMPERATURE
SENSOR

AKX01407AB

INTAKE AIR TEMPERATURE
SENSOR SIDE CONNECTOR

1 2 3 4 5 6 7

AKX01621 AB

INTAKE AIR
TEMPERATURE
SENSOR

AK000280

CONNECTOR : C-40

PCM

AV

MULTIPORT FUEL INJECTION(MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-64

STEP 17. Check for harness damage between intake air
temperature sensor connector B-14 terminal 5 and PCM
connector C-40 terminal 57.
Q: Is the harness wire in good condition?

YES : Go to Step 18.
NO : Repair it. Then go to Step 19.

STEP 18. Check for harness damage between intake air
temperature sensor connector B-14 terminal 6 and PCM
connector C-40 terminal 64.
Q: Is the harness wire in good condition?

YES : Replace the PCM. Then go to Step 19.
NO : Repair it. Then go to Step 19.

ACX02480

CONNECTOR : B-14

AG

INTAKE AIR
TEMPERATURE
SENSOR

AK000280

CONNECTOR : C-40

PCM

AV

ACX02480

CONNECTOR : B-14

AG

INTAKE AIR
TEMPERATURE
SENSOR

AK000280

CONNECTOR : C-40

PCM

AV