Mitsubishi Galant (2004+). Manual - part 1006

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-841

STEP 4. Check the continuity at PCM harness side 
connector B-20.

(1) Disconnect the connector B-20 and measure at the harness 

side.

(2) Measure the continuity between terminals No. 34, No. 38 

and ground.

• Should be less than 2 ohms.

Q: Does continuity exist? 

YES : Go to Step 5.
NO :  Repair harness wire between PCM connector B-20 

(terminals No. 34, No. 38) and ground because of 
open circuit or harness damage. Then go to Step 8.

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

25

21

24 23 22

29 28 27 26

34 33 32 31 30

38 37 36 35

43 42 41 40 39

AK203009

B-20 HARNESS 
CONNECTOR: 
COMPONENT SIDE

AD

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-842

STEP 5. Check for open circuit and harness damage 
between throttle actuator control motor connector B-06 
(terminal No. 1) and PCM connector B-23 (terminal No. 
147).

Q: Is the harness wire in good condition?

YES : Go to Step 6.
NO :  Repair it. Then go to Step 8.

AK303817AB

CONNECTOR: B-06

B-06 (B)

THROTTLE
ACTUATOR
CONTROL
MOTOR

THROTTLE 
POSITION 
SENSOR

127 126 125 124 123 122 121

133 132 131 130 129 128

140 139 138 137 136 135 134

146 145 144 143 142 141

153 152 151 150 149 148 147

AK303058

HARNESS CONNECTOR: 
COMPONENT SIDE

CONNECTOR: B-23

B-23

PCM

AB

AIR CLEANER

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-843

STEP 6. Check for open circuit and harness damage 
between throttle actuator control motor connector B-06 
(terminal No. 2) and PCM connector B-23 (terminal No. 
141).

Q: Is the harness wire in good condition?

YES : Go to Step 7.
NO :  Repair it. Then go to Step 8.

AK303817AB

CONNECTOR: B-06

B-06 (B)

THROTTLE
ACTUATOR
CONTROL
MOTOR

THROTTLE 
POSITION 
SENSOR

127 126 125 124 123 122 121

133 132 131 130 129 128

140 139 138 137 136 135 134

146 145 144 143 142 141

153 152 151 150 149 148 147

AK303058

HARNESS CONNECTOR: 
COMPONENT SIDE

CONNECTOR: B-23

B-23

PCM

AB

AIR CLEANER

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-844

STEP 7. 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 P2100 set?

YES : Replace the PCM. Then go to Step 8.
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 8. Using scan tool MB991958, read the diagnostic 
trouble code (DTC).

(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 P2100 set?

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

AK303804AB

MB991910

DATA LINK
CONNECTOR

MB991824

MB991827

AK303804AB

MB991910

DATA LINK
CONNECTOR

MB991824

MB991827