Mitsubishi Galant (2004+). Manual - part 1230

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>

13B-613

STEP 8. Check harness connector B-22 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 20.

AK303016

104

96

94

95

93 92 91

99 98 97

103 102 101 100

108 107 106 105

113 112 111 110 109

CONNECTOR: B-22

B-22 (B)

PCM

AB

HARNESS CONNECTOR: 
COMPONENT SIDE

AIR CLEANER

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>

13B-614

STEP 9. Check for short circuit to ground between 
camshaft position sensor connector B-106 (terminal No. 2) 
and PCM connector B-22 (terminal No. 104).

Q: Is the harness wire in good condition?

YES : Replace the PCM. Then go to Step 20.
NO :  Repair it. Then go to Step 20.

1

2

3

AK303130

HARNESS 
CONNECTOR: 
COMPONENT SIDE

AB

CAMSHAFT POSITION 
SENSOR

B-106 (B)

CONNECTOR: B-106

AK303016

104

96

94

95

93 92 91

99 98 97

103 102 101 100

108 107 106 105

113 112 111 110 109

CONNECTOR: B-22

B-22 (B)

PCM

AB

HARNESS CONNECTOR: 
COMPONENT SIDE

AIR CLEANER

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>

13B-615

STEP 10. Measure the power supply voltage at camshaft 
position sensor connector B-106.

(1) Disconnect the connector B-106 and measure at the 

harness side.

(2) Turn the ignition switch to the "ON" position.

(3) Measure the voltage between terminal No. 3 and ground.

• Voltage should be battery positive voltage.

(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is battery positive voltage (approximately 12 volts) 

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

STEP 11. Check harness connector B-17X at MFI relay for 
damage.

Q: Is the harness connector in good condition?

YES : Repair harness wire between MFI relay connector 

B-17X (terminal No. 4) and camshaft position sensor 
connector B-106 (terminal No. 3) because of open 
circuit or short circuit to ground. Then go to Step 20.

NO :  Repair or replace it. Refer to GROUP 00E, Harness 

Connector Inspection 

P.00E-2

. Then go to Step 20.

1

2

3

AK303130

HARNESS 
CONNECTOR: 
COMPONENT SIDE

AB

CAMSHAFT POSITION 
SENSOR

B-106 (B)

CONNECTOR: B-106

AK303134

B-106 HARNESS 
CONNECTOR: 
COMPONENT SIDE

3 2 1

AB

1

2

3

4

AK303017

CONNECTOR: B-17X

FRONT OF VEHICLE

B-17X

AB

HARNESS
CONNECTOR:
COMPONENT SIDE

RELAY BOX

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>

13B-616

STEP 12. Check the continuity at camshaft position sensor 
connector B-106.

(1) Disconnect the connector B-106 and measure at the 

harness side.

(2) Check for the continuity between terminal No. 1 and 

ground.

• Should be less than 2 ohms.

Q: Does continuity exist?

YES : Go to Step 15.
NO :  Go to Step 13.

STEP 13. Check harness connector B-22 at PCM for 
damage.

Q: Is the harness 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 20.

1

2

3

AK303130

HARNESS 
CONNECTOR: 
COMPONENT SIDE

AB

CAMSHAFT POSITION 
SENSOR

B-106 (B)

CONNECTOR: B-106

AK303135 AB

B-106 HARNESS
CONNECTOR: 
COMPONENT SIDE

1

2

3

AK303016

104

96

94

95

93 92 91

99 98 97

103 102 101 100

108 107 106 105

113 112 111 110 109

CONNECTOR: B-22

B-22 (B)

PCM

AB

HARNESS CONNECTOR: 
COMPONENT SIDE

AIR CLEANER