Mitsubishi Galant (2004+). Manual - part 1023

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-909

STEP 4. Check for harness damage between accelerator 
pedal position sensor connector C-24 (terminal No. 2) and 
PCM connector B-20 (terminal No. 31).

Q: Is the harness wire in good condition?

YES : Go to Step 5.
NO :  Repair it. Then go to Step 16.

AK303906

1

6 5 4 3 2

AB

C-24 (B)

CONNECTOR: C-24

HARNESS CONNECTOR:
COMPONENT SIDE

AK303092

25

21

24 23 22

29 28 27 26

34 33 32 31 30

38 37 36 35

43 42 41 40 39

CONNECTOR: B-20

B-20

PCM

AB

HARNESS CONNECTOR: 
COMPONENT SIDE

AIR CLEANER

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-910

STEP 5. Using scan tool MB991958, read the diagnostic 
trouble code (DTC).

CAUTION

To prevent damage to scan tool MB991958, always turn the 
ignition switch to the "LOCK"(OFF) position before con-
necting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) After the DTC has been deleted, read the DTC again.
(4) Turn the ignition switch to the "LOCK"(OFF) position.
Q: Is DTC P2138 set?

YES : Replace the PCM. Then go to Step 16.
NO :  It can be assumed that this malfunction is intermittent. 

Refer to GROUP 00, How to Use 
Troubleshooting/Inspection Service Points 

P.00-6

.

STEP 6. Check the continuity at accelerator pedal position 
sensor harness side connector C-24.

(1) Disconnect the connector C-24 and measure at the harness 

side.

(2) Measure the continuity between terminal No. 5 and ground.

• Should be less than 2 ohms.

Q: Does continuity exist?

YES : Go to Step 10.
NO :  Go to Step 7.

AK303804AB

MB991910

DATA LINK
CONNECTOR

MB991824

MB991827

AK303906

1

6 5 4 3 2

AB

C-24 (B)

CONNECTOR: C-24

HARNESS CONNECTOR:
COMPONENT SIDE

1

6 5 4 3 2

AK203020

C-24 HARNESS 
CONNECTOR: 
COMPONENT SIDE

AC

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-911

STEP 7. Check harness connector B-20 at PCM for 
damage.

Q: Is the harness 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 16.

AK303092

25

21

24 23 22

29 28 27 26

34 33 32 31 30

38 37 36 35

43 42 41 40 39

CONNECTOR: B-20

B-20

PCM

AB

HARNESS CONNECTOR: 
COMPONENT SIDE

AIR CLEANER

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-912

STEP 8. Check for harness damage between accelerator 
pedal position sensor connector C-24 (terminal No. 5) and 
PCM connector B-20 (terminal No. 22).

Q: Is the harness wire in good condition?

YES : Go to Step 9.
NO :  Repair it. Then go to Step 16.

AK303906

1

6 5 4 3 2

AB

C-24 (B)

CONNECTOR: C-24

HARNESS CONNECTOR:
COMPONENT SIDE

AK303092

25

21

24 23 22

29 28 27 26

34 33 32 31 30

38 37 36 35

43 42 41 40 39

CONNECTOR: B-20

B-20

PCM

AB

HARNESS CONNECTOR: 
COMPONENT SIDE

AIR CLEANER