Mitsubishi Galant. Manual — part 102

MULTIPORT FUEL INJECTION(MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-89

STEP 3. Check the sensor supply voltage at throttle
position sensor harness side connector B-05.
(1) Disconnect the connector B-05 and measure at the harness

side.

(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between terminal 4 and ground.

•

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 6.
NO : Go to Step 4.

STEP 4. Check 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 (

P.00E-2

). Then go to Step 14.

STEP 5. Check for open circuit and short circuit to ground
between throttle position sensor connector B-05 terminal 4
and PCM connector C-40 terminal 46.
Q: Is the harness wire in good condition?

YES : Replace the PCM. Then go to Step 14.
NO : Repair it. Then go to Step 14.

AK000236

B-05 HARNESS
SIDE CONNECTOR

1

2

3

4

AE

AK000280

CONNECTOR : C-40

PCM

AV

ACX02472

CONNECTOR : B-05

THROTTLE
POSITION
SENSOR

AG

AK000280

CONNECTOR : C-40

PCM

AV

MULTIPORT FUEL INJECTION(MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-90

STEP 6. Check the continuity at throttle position sensor
harness side connector B-05.
(1) Disconnect the connector B-05 and measure at the harness

side.

(2) Measure the continuity between terminal 1 and ground.

•

Should be less than 2 ohm.

Q: Is the continuity normal?

YES : Go to Step 9.
NO : Go to Step 7.

STEP 7. Check connector C-40 at PCM for damage.
Q: Is the connector in good condition?

YES : Go to Step 8.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection (

P.00E-2

). Then go to Step 14.

STEP 8. Check for open circuit and harness damage
between throttle position sensor connector B-05 terminal 1
and PCM connector C-40 terminal 57.
Q: Is the harness wire in good condition?

YES : Replace the PCM. Then go to Step 14.
NO : Repair it. Then go to Step 14.

AK000237

B-05 HARNESS
SIDE CONNECTOR

1

2

3

4

AD

AK000280

CONNECTOR : C-40

PCM

AV

ACX02472

CONNECTOR : B-05

THROTTLE
POSITION
SENSOR

AG

AK000280

CONNECTOR : C-40

PCM

AV

MULTIPORT FUEL INJECTION(MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-91

STEP 9. Check the throttle position sensor.
(1) Disconnect the connector B-05.
(2) Measure the resistance between throttle position sensor

side connector terminal 1 and 4.

Standard value: 3.5

−−−−

6.5 k

Ω

Ω

Ω

Ω

(3) Measure resistance between the throttle position sensor

side connector terminal 1 and 3.

(4) Move the throttle valve from the idle position to the full-open

position.

•

Resistance should change smoothly in proportion to the
opening angle of the throttle valve.

Q: Is the resistance normal?

YES : Go to Step 10.
NO : Replace the throttle position sensor.(Refer to

P.13A-

452

, Throttle Body.) Then go to Step 14.

STEP 10. Check connector C-40, C-41 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 14.

ACX02472

CONNECTOR : B-05

THROTTLE
POSITION
SENSOR

AG

AK000320

1 2 3 4

THROTTLE POSITION
SENSOR SIDE
CONNECTOR

AB

AK000280

CONNECTORS : C-40, C-41

C-41

C-40

PCM

AX

MULTIPORT FUEL INJECTION(MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-92

STEP 11. Check for open circuit and short circuit to ground
between throttle position sensor connector B-05 terminal 3
and PCM connector C-41 terminal 78.
Q: Is the harness wire in good condition?

YES : Go to Step 12.
NO : Repair it. Then go to Step 14.

STEP 12. Check for short circuit to ground between
throttle position sensor connector and auto-cruise control-
ECU.
Refer to GROUP 17, Auto Cruise Control System-Diagnostic
Trouble Code Chart (

P.17-10

).

Q: Is the harness wire in good condition?

YES : Go to Step 13.
NO : Repair it. Then go to Step 14.

ACX02472

CONNECTOR : B-05

THROTTLE
POSITION
SENSOR

AG

AK000280

CONNECTOR : C-41

PCM

AY