Mitsubishi Galant (2004+). Manual — part 1201

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>

13B-497

STEP 5. Check the No. 3 cylinder injector.

(1) Disconnect the No. 3 cylinder injector connector B-03.

(2) Measure the resistance between injector side connector

terminal No. 1 and No. 2.

Standard value: 10.5

− 13.5 ohms [at 20°C (68°F)]

Q: Is the resistance between 10.5 and 13.5 ohms [at 20

°C

(68

°F)]?

YES : Repair harness wire between intermediate connector

B-32 (terminal No. 9) and injector connector B-03
(terminal No. 1) and harness wire between No.3
cylinder injector connector B-03 (terminal No. 2)
and intermediate connector B-32 (terminal No. 10)
because of open circuit or short circuit to ground
or harness damage.

Then go to Step 12.

NO : Replace the No.3 cylinder injector. Then go to Step

12.

STEP 6. Measure the power supply voltage at intermediate
connector B-32.

(1) Disconnect the connector B-32 and measure at the female

connector side.

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

(3) Measure the voltage between terminal No. 9 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 8.
NO : Go to Step 7.

AK303108

M

1

2

CONNECTOR: B-03

AB

B-03 (GR)

HARNESS CONNECTOR:
COMPONENT SIDE

AK000559

2

1

INJECTOR SIDE
CONNECTOR

AB

AK303053

3

4

5

8

9

1

2

6

7

10

CONNECTOR: B-32

HARNESS CONNECTOR:
COMPONENT SIDE

AB

B-32 (B)

3

4

5

8

9

1

2

6

7

10

AK203172

B-32 HARNESS
CONNECTOR:
COMPONENT
SIDE

AB

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>

13B-498

STEP 7. Check harness connector B-17X at MFI relay for
damage.

Q: Is the connector in good condition?

YES : Repair harness wire between MFI relay connector

B-17X (terminal No. 4) and intermediate connector
B-32 (terminal No. 9) because of open circuit or short
circuit to ground. Then go to Step 12.

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

Connector Inspection

P.00E-2

. 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

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>

13B-499

STEP 8. Check for harness damage between MFI relay
connector B-17X (terminal No. 4) and intermediate
connector B-32 (terminal No. 9).

Q: Is the harness wire in good condition?

YES : Go to Step 9.
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

AK303053

3

4

5

8

9

1

2

6

7

10

CONNECTOR: B-32

HARNESS CONNECTOR:
COMPONENT SIDE

AB

B-32 (B)

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>

13B-500

STEP 9. Check harness connector B-23 at PCM for
damage.

Q: Is the connector in good condition?

YES : Go to Step 10.
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