Mitsubishi Galant. Manual — part 257

MULTIPORT FUEL INJECTION(MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-253

STEP 7. Check connector C-115 at PCM for damage.
Q: Is the connector in good condition?

YES : Repair harness wire between camshaft position

sensor connector B-22 terminal 5 and PCM connector
C-115 terminal 56 because of open circuit. 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 8. Check connector C-115 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 18.

STEP 9. Check for short circuit to ground between
camshaft position sensor connector B-22 terminal 5 and
PCM connector C-115 terminal 56.
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.

AK000280

CONNECTOR : C-40

PCM

AV

AK000280

CONNECTOR : C-40

PCM

AV

AK000619 AD

CONNECTOR:B-27

AK000280

CONNECTOR : C-40

PCM

AV

MULTIPORT FUEL INJECTION(MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-254

STEP 10. Check the power supply voltage at camshaft
position sensor connector B-22.
(1) Disconnect the connector B-22 and measure at the harness

side.

(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between terminal 6 and ground.

•

Voltage should be battery positive voltage.

(4) Turn the ignition switch to the "LOCK"(OFF) position.

Q: Is the voltage normal?

YES : Go to Step 12.
NO : Go to Step 11.

STEP 11. Check connector A-21X at MFI relay for damage.
Q: Is the connector in good condition?

YES : Repair harness wire between MFI relay connector A-

21X terminal 1 and camshaft position sensor
connector B-22 terminal 6 because of open circuit or
short circuit to ground. 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 12. Check the continuity at camshaft position sensor
connector B-22.
(1) Disconnect the connector B-22 and measure at the harness

side.

(2) Check for the continuity between terminal 7 and ground.

•

Should be less than 2 ohm.

Q: Is the continuity normal?

YES : Go to Step 13.
NO : Repair harness wire between camshaft position

sensor connector B-22 terminal 7 and ground
because of open circuit or harness damage. Then go
to Step 18.

AK000252AC

7 6 5 4 3 2 1

B-27 HARNESS
SIDE CONNECTOR

AK000555AB

CONNECTOR : A-21X

MFI RELAY

AK000253AC

7 6 5 4 3 2 1

B-27 HARNESS
SIDE CONNECTOR

MULTIPORT FUEL INJECTION(MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-255

STEP 13. Check connector A-21X at the MFI relay 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 connector C-115 at PCM for damage.
Q: Is the connector in good condition?

YES : Go to Step 15.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection (

P.00E-2

). Then go to Step 18.

STEP 15. Check for harness damage between MFI relay
connector A-21X terminal 1 and camshaft position sensor
connector B-22 terminal 6.
Q: Is the harness wire in good condition?

YES : Go to Step 16.
NO : Repair it. Then go to Step 18.

AK000555AB

CONNECTOR : A-21X

MFI RELAY

AK000280

CONNECTOR : C-40

PCM

AV

AK000555AB

CONNECTOR : A-21X

MFI RELAY

AK000619 AD

CONNECTOR:B-27

MULTIPORT FUEL INJECTION(MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-256

STEP 16. Check for harness damage between camshaft
position sensor connector B-22 terminal 5 and PCM
connector C-115 terminal 56.
Q: Is the harness wire in good condition?

YES : Go to Step 17.
NO : Repair it. Then go to Step 18.

STEP 17. Check the camshaft position sensor vane.

Q: Is the vane in a good condition?

YES : Replace the camshaft position sensor. Then go to

Step 18.

NO : Repair it. Then go to Step 18.

STEP 18. Test the OBD-II drive cycle.
(1) Carry out a test drive with the drive cycle pattern. Refer to,

Procedure 6

−

Other Monitor(

P.13B-4

).

(2) Check the diagnostic trouble code (DTC).

Q: Is the DTC P0340 is output?

YES : Retry the troubleshooting.
NO : The inspection is complete.

DTC P0401: Exhaust Gas Recirculation Flow Insufficient Detected

TECHNICAL DESCRIPTION

•

When the EGR solenoid switches from "OFF" to
"ON" while the engine is running, EGR gas flows.

•

The PCM checks how the EGR gas flow signal
changes.

DTC SET CONDITIONS

Check Conditions

•

At least twenty seconds have passed since the
last monitor was complete.

•

Engine coolant temperature is higher than 77

°

C

(141

°

F).

•

Engine speed is at between 910 and 1,650 r/min.

•

Intake air temperature is higher than 5

°

C (41

°

F).

AK000619 AD

CONNECTOR:B-27

AK000280

CONNECTOR : C-40

PCM

AV