Mitsubishi Galant (2004+). Manual - part 1235

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>

13B-633

STEP 7. Check for open circuit and short circuit to ground 
between EGR valve connector B-105 and PCM connector 
B-22.

a. EGR valve connector B-105 (terminal No. 1) and PCM con-

nector B-23 (terminal No. 142).

b. EGR valve connector B-105 (terminal No. 3) and PCM con-

nector B-23 (terminal No. 136).

c. EGR valve connector B-105 (terminal No. 4) and PCM con-

nector B-23 (terminal No. 130). 

d. EGR valve connector B-105 (terminal No. 6) and PCM con-

nector B-23 (terminal No. 124).

Q: Is the harness wire in good condition?

YES : Replace the PCM. Then go to Step 12.
NO :  Repair it. Then go to Step 12.

1

2 3

4

5 6

AK303137AB

B-105(GR)

CONNECTOR: B-105

EGR 
VALVE

BRAKE FLUID
RESERVOIR

HARNESS 
CONNECTOR: 
COMPONENT SIDE

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) <3.8L ENGINE>

13B-634

STEP 8. Check harness connector B-23 at PCM for 
damage.

Q: Is the harness 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 12.

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) <3.8L ENGINE>

13B-635

STEP 9. Check the EGR valve operation using special tool 
MB991658.

(1) Remove the EGR valve.

(2) Connect special tool MB991658 to the EGR valve. (All 

terminals should be connected.)

(3) Use the jumper wires to connect terminal No. 5 of the EGR 

valve onnector to the positive battery terminal.

(4) Check to ensure that the motor operates when the terminal 

No. 1 and No. 3 of the EGR valve connector are 
respectively connected to the negative battery terminal 
using a jumper wire.

• Vibration should be present at each application of volt-

age to test clip combination.

(5) Then, use jumper wires to connect the terminal No. 2 of the 

EGR valve connector to the positive battery terminal.

(6) Check to ensure that the motor operates when terminal No. 

4 and No. 6 of the EGR valve connector are respectively 
connected to the negative battery terminal using a jumper 
wire.

• Vibration should be present at each application of volt-

age to test clip combination.

(7) Reinstall the EGR valve, using a new gasket, and tighten to 

the specified torque.

Tighten torque : 24 

± 3 N⋅m [17 ± 3 ft⋅Ib]

Q: Is the EGR valve operating properly?

YES : Go to Step 10.
NO :  Replace the EGR valve. Then go to Step 12.

1

2 3

4

5 6

AK303137AB

B-105(GR)

CONNECTOR: B-105

EGR 
VALVE

BRAKE FLUID
RESERVOIR

HARNESS 
CONNECTOR: 
COMPONENT SIDE

AK203699

+

-

AB

BATTERY

MB991658

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>

13B-636

STEP 10. Check for harness damage between MFI relay 
connector B-17X (terminal No. 4) and EGR valve connector 
B-105 (terminal No. 2, No. 5).

Q: Is the harness wire in good condition?

YES : Go to Step 11.
NO :  Repair it. Then go to Step 12.

1

2

3

4

AK303017

CONNECTOR: B-17X

FRONT OF VEHICLE

B-17X

AB

HARNESS
CONNECTOR:
COMPONENT SIDE

RELAY BOX

1

2 3

4

5 6

AK303137AB

B-105(GR)

CONNECTOR: B-105

EGR 
VALVE

BRAKE FLUID
RESERVOIR

HARNESS 
CONNECTOR: 
COMPONENT SIDE