Mitsubishi Galant 9G. Manual — part 1079

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>

13B-616

STEP 10. Check for short circuit to ground between
crankshaft position sensor connector B-119 (terminal No.
2) and PCM connector B-22 (terminal No. 103).
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.

AK303123

1

2

3

CRANKSHAFT
POSITION
SENSOR

AB

CRANKSHAFT
SPROCKET

CONNECTOR: B-119

B-119 (B)

HARNESS
CONNECTOR:
COMPONENT SIDE

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-617

STEP 11. Measure the power supply voltage at crankshaft
position sensor harness side connector B-119.
(1) Disconnect the connector B-119 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 13.
NO : Go to Step 12.

AK303123

1

2

3

CRANKSHAFT
POSITION
SENSOR

AB

CRANKSHAFT
SPROCKET

CONNECTOR: B-119

B-119 (B)

HARNESS
CONNECTOR:
COMPONENT SIDE

AK303127AB

2 1

3

B-119 HARNESS
CONNECTOR:
COMPONENT SIDE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>

13B-618

STEP 12. 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 crankshaft position sensor
connector B-119 (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

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-619

STEP 13. Check for continuity at crankshaft position
sensor harness side connector B-119.
(1) Disconnect the connector B-119 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 16.
NO : Go to Step 14.

AK303123

1

2

3

CRANKSHAFT
POSITION
SENSOR

AB

CRANKSHAFT
SPROCKET

CONNECTOR: B-119

B-119 (B)

HARNESS
CONNECTOR:
COMPONENT SIDE

AK303128 AB

2 1

3

B-119 HARNESS
CONNECTOR:
COMPONENT SIDE