Mitsubishi Galant (2004+). Manual — part 952

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-625

DIAGNOSIS

Required Special Tools:

• MB991958: Scan tool (MUT-III Sub Assembly)

• MB991824: V.C.I.

• MB991827: USB Cable

• MB991910: Main Harness A

• MB991923: Power Plant ECU Check Harness

STEP 1. Using scan tool MB991958, check actuator test
item 08: Evaporative Emission Purge Solenoid.

CAUTION

To prevent damage to scan tool MB991958, always turn the
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958 to the data link connector.
(2) Turn the ignition switch to the "ON" position.

(3) Set scan tool MB991958 to the actuator test mode for item

08, Evaporative emission purge solenoid.

• An operation sound should be heard and vibration

should be felt when the evaporative emission purge
solenoid is operated.

(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the solenoid operating properly?

YES : It can be assumed that this malfunction is intermittent.

Refer to GROUP 00, How to Use
Troubleshooting/Inspection Service Points

P.00-6

.

NO : Go to Step 2.

STEP 2 Check harness connector B-05 at the evaporative
emission purge solenoid for damage.

Q: Is the harness connector in good condition?

YES : Go to Step 3.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection

P.00E-2

. Then go to Step 12.

AK303804AB

MB991910

DATA LINK
CONNECTOR

MB991824

MB991827

AK303870

1

2

AB

CONNECTOR: B-05

B-05 (B)

HARNESS
CONNECTOR:
COMPONENT SIDE

INTAKE
MANIFOLD

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-626

STEP 3 Check the evaporative emission purge solenoid.

(1) Disconnect the evaporative emission purge solenoid

connector B-05.

(2) Measure the resistance between evaporative emission

purge solenoid side connector terminal No. 1 and No. 2.

Standard value: 30

− 34 ohms [at 20°C (68°F)]

Q: Is the measured resistance between 30 and 34 ohms [at

20

°C (68°F)]?

YES : Go to Step 4.
NO : Replace the evaporative emission purge solenoid.

Then go to Step 12.

STEP 4. Measure the power supply voltage at evaporative
emission purge solenoid harness side connector B-05.

(1) Disconnect the connector B-05 and measure at the harness

side.

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

(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 6.
NO : Go to Step 5.

AK303870

1

2

AB

CONNECTOR: B-05

B-05 (B)

HARNESS
CONNECTOR:
COMPONENT SIDE

INTAKE
MANIFOLD

1 2

AK202961

EVAPORATIVE EMISSION
PURGE SOLENOID
CONNECTOR

AB

AK303870

1

2

AB

CONNECTOR: B-05

B-05 (B)

HARNESS
CONNECTOR:
COMPONENT SIDE

INTAKE
MANIFOLD

AK202962

1

2

B-05 HARNESS
CONNECTOR:
COMPONENT SIDE

AC

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-627

STEP 5. 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 evaporative emission
purge solenoid connector B-05 (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

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MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-628

STEP 6. Measure the power supply voltage at PCM
connector B-23 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.

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

AK202954

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

AB

POWER PLANT ECU
CHECK HARNESS CONNECTOR

MB991923

PCM