Mitsubishi Galant (2004+). Manual — part 1034

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-953

STEP 8. Check harness connector B-01 or B-03 or B-27 or
B-30 at injector 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 confirm that the

malfunction symptom is eliminated.

STEP 9. Check the injector.

(1) Disconnect the injector connector B-01, B-03, B-27 and

B-30.

(2) Measure the resistance between each injector side

connector terminal No. 1 and No. 2.

Standard value: 10.5

− 13.5 ohms [at 20°C (68°F)]

Q: Is the measured resistance between 10.5 and 13.5 ohms

[at 20

°C (68°F)?

YES : Go to Step 10.
NO : Repair the injector. Then confirm that the malfunction

symptom is eliminated.

M

1

2

AK303920

B-01 (GR)

B-03 (GR)

B-30 (GR)

B-27 (GR)

CONNECTORS: B-01, B-03, B-27, B-30

HARNESS CONNECTOR:
COMPONENT SIDE

AB

M

1

2

AK303920

B-01 (GR)

B-03 (GR)

B-30 (GR)

B-27 (GR)

CONNECTORS: B-01, B-03, B-27, B-30

HARNESS CONNECTOR:
COMPONENT SIDE

AB

AK000559

2

1

INJECTOR SIDE
CONNECTOR

AB

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-954

STEP 10. Check harness connector B-23 at PCM for
damage.

Q: Is the harness connector in good condition?

YES : Go to Step 11.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection

P.00E-2

. Then confirm that the

malfunction symptom is eliminated.

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

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-955

STEP 11. Check for harness damage between injector
connector and PCM connector.

a. Check the harness wire between injector connector B-01

(terminal No. 2) and PCM connector B-23 (terminal No.
153) at No. 1 cylinder.

b. Check the harness wire between injector connector B-30

(terminal No. 2) and PCM connector B-23 (terminal No.
146) at No. 2 cylinder.

c. Check the harness wire between injector connector B-03

(terminal No. 2) and PCM connector B-23 (terminal No.
140) at No. 3 cylinder.

d. Check the harness wire between injector connector B-27

(terminal No. 2) and PCM connector B-23 (terminal No.
139) at No. 4 cylinder.

Q: Is the harness wire in good condition?

YES : Check the following items, and repair or replace the

defective items.

a. Check the ignition coil and spark plugs.
b. Check if the injectors are clogged.

c. Check if fuel is contaminated.

d. Check compression.

Then confirm that the malfunction symptom is

eliminated.

NO : Repair it. Then confirm that the malfunction symptom

is eliminated.

M

1

2

AK303920

B-01 (GR)

B-03 (GR)

B-30 (GR)

B-27 (GR)

CONNECTORS: B-01, B-03, B-27, B-30

HARNESS CONNECTOR:
COMPONENT SIDE

AB

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

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-956

INSPECTION PROCEDURE 6: Starts Up and Dies.

.

COMMENT

• In such cases as the above, the cause is usually

improper air/fuel mixture. It is possible, though
less likely, that the spark plugs are generating
sparks but the sparks are weak.

.

TROUBLESHOOTING HINTS (The most likely
causes for this case:)

• Malfunction of the ignition system.

• Malfunction of the injector system.

• Contaminated fuel.

• Poor compression.

• Dirtiness around throttle valve.

• Malfunction of the PCM.

DIAGNOSIS

Required Special Tools:

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

• MB991824: V.C.I.

• MB991827: USB Cable

• MB991910: Main Harness A

STEP 1. Measure the battery positive voltage.
(1) Measure the battery positive voltage during cranking.

• The voltage should remain greater than 8 volts while the

engine is cranked.

Q: Does the voltage remain greater than 8 volts while the

engine is cranked?
YES : Go to Step 2.
NO : Refer to GROUP 54A, Battery

− Battery check

P.54A-5

.