Mitsubishi Galant 9G. Manual — part 800

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-642

STEP 5. Check harness connector B-17X at MFI relay for
damage.
Q: Is the harness connector in good condition?

YES : Check connectors A-13 and C-25 at intermediate

connector for damage, and repair or replace as
required. Refer to GROUP 00E, Harness Connector
Inspection

P.00E-2

. If intermediate connectors are in

good condition, repair harness wire between MFI
relay connector B-17X (terminal No. 4) and
evaporative emission ventilation solenoid connector
F-08 (terminal No. 2) 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.

AK303806

2

1

3

4

AB

CONNECTOR: B-17X

B-17X

RELAY BOX
TRIANGLE
MARK

HARNESS CONNECTOR:
COMPONENT SIDE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-643

STEP 6. Measure the power supply voltage at PCM
connector B-19 by using power plant ECU check harness
special tool MB991923.
(1) Disconnect the all PCM connectors and connect power

plant ECU check harness special tool MB991923 between
the separated connectors.

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

AK303153

4 3 2 1

7 6 5

9 8

11 10

14 13 12

18 17 16 15

CONNECTOR: B-19

PCM

AB

AIR CLEANER

HARNESS CONNECTOR:
COMPONENT SIDE

B-19 (B)

AK202974

4 3 2 1

7 6 5

9 8

11 10

14 13 12

18 17 16 15

AB

POWER PLANT ECU
CHECK HARNESS CONNECTOR

MB991923

PCM

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-644

(3) Measure the voltage between terminal No. 2 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 9.
NO : Go to Step 7.

STEP 7. Check harness connector B-19 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 12.

4 3 2 1

7 6 5

9 8

11 10

14 13 12

18 17 16 15

AK202975AB

POWER PLANT ECU
CHECK HARNESS
CONNECTOR

AK303153

4 3 2 1

7 6 5

9 8

11 10

14 13 12

18 17 16 15

CONNECTOR: B-19

PCM

AB

AIR CLEANER

HARNESS CONNECTOR:
COMPONENT SIDE

B-19 (B)

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

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MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-645

STEP 8. Check for open circuit and short circuit to ground
between evaporative emission ventilation solenoid
connector F-08 (terminal No. 1) and PCM connector B-19
(terminal No. 11).

NOTE: Check harness after checking intermediate connector
C-25. If intermediate connector is damaged, repair or replace it.
Refer to GROUP 00E, Harness Connector Inspection

P.00E-2

.

Then go to Step 12.
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.

AK303873

1

2

AB

CONNECTOR: F-08

F-08 (B)

HARNESS
CONNECTOR:
COMPONENT SIDE

AK303153

4 3 2 1

7 6 5

9 8

11 10

14 13 12

18 17 16 15

CONNECTOR: B-19

PCM

AB

AIR CLEANER

HARNESS CONNECTOR:
COMPONENT SIDE

B-19 (B)