Mitsubishi Outlander GS45X. Manual — part 973

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-825

DIAGNOSIS

STEP 1. Check the ignition coil.
(1) Remove the intake manifold.
(2) Refer to GROUP 16, Ignition System

− On-vehicle Service

− Ignition Coil Check

P.16-44

.

Q: Are there any abnormalities?

YES : Replace the ignition coil. Then confirm that the

malfunction symptom is eliminated.

NO : Go to Step 2.

STEP 2. Check harness connectors harness connector
B-10 at ECM and harness connector A-33X at MFI relay and
B-01, B-04, B-05, B-15, B-18, B-19 at ignition coil 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 confirm that the

malfunction symptom is eliminated.

STEP 3. Check the continuity at ignition coil connectors
B-01, B-04, B-05, B-15, B-18, B-19.
(1) Disconnect the connector B-01, B-04, B-05, B-15, B-18 and

B-19 measure at the harness side.

(2) Check for the continuity between terminal No. 2 and

ground.

• Should be less than 2 ohms.

Q: Does continuity exist?

YES : Go to Step 4.
NO : Check the connector B-21 at intermediate connector

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

P.00E-2

. If intermediate connector is in good

condition, repair harness wire between ignition coil
connector ignition coil connectors B-01, B-04, B-05,
B-15, B-18 and B-19 (terminal No. 2) and ground
because of open circuit or harness damage. Then
confirm that the malfunction symptom is eliminated.

AK700222

1

2

3

AB

B-01, B-04, B-05,
B-15, B-18, B-19
harness connector:
component side

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

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MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-826

STEP 4. Check for open circuit and harness damage
between MFI relay connector and ignition coil connector.
NOTE: Check harness after checking intermediate connectors
A-13 and B-21. If intermediate connectors are damaged, repair
or replace it. Refer to GROUP 00E, Harness Connector Inspec-
tion

P.00E-2

. Then confirm that the malfunction symptom is

eliminated.
(1) Disconnect the MFI relay connector and ignition coil

connector.

(2) Measure the resistance between MFI relay connector and

ignition coil connector.

a. MFI relay connector A-33X (terminal No. 2) and ignition

coil connector B-01 (terminal No. 3) at ignition coil 1.

b. MFI relay connector A-33X (terminal No. 2) and ignition

coil connector B-19 (terminal No. 3) at ignition coil 2.

c. MFI relay connector A-33X (terminal No. 2) and ignition

coil connector B-04 (terminal No. 3) at ignition coil 3.

d. MFI relay connector A-33X (terminal No. 2) and ignition

coil connector B-18 (terminal No. 3) at ignition coil 4.

e. MFI relay connector A-33X (terminal No. 2) and ignition

coil connector B-05 (terminal No. 3) at ignition coil 5.

f. MFI relay connector A-33X (terminal No. 2) and ignition

coil connector B-15 (terminal No. 3) at ignition coil 6.

• Should be less than 2 ohms.

Q: Is the measured resistance less than 2 ohms?

YES : Go to Step 5.
NO : Repair it. Then confirm that the malfunction symptom

is eliminated.

AK704119

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2

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3

1

2

4

AB

A-33X harness
connector:
component side

B-01, B-04, B-05,
B-15, B-18, B-19
harness connector:
component side

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

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MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-827

STEP 5. Check for open circuit and harness damage
between ignition coil connector and ECM connector.
NOTE: Check harness after checking intermediate connector
B-21. If intermediate connector is damaged, repair or replace it.
Refer to GROUP 00E, Harness Connector Inspection

P.00E-2

.

Then confirm that the malfunction symptom is eliminated.
(1) Disconnect the ignition coil connector and ECM connector.
(2) Measure the resistance between ignition coil connector and

ECM connector.

a. Ignition coil connector B-01 (terminal No. 2) and ECM

connector B-10 (terminal No. 4) at ignition coil 1.

b. Ignition coil connector B-19 (terminal No. 2) and ECM

connector B-10 (terminal No. 5) at ignition coil 2.

c. Ignition coil connector B-04 (terminal No. 2) and ECM

connector B-10 (terminal No. 20) at ignition coil 3.

d. Ignition coil connector B-18 (terminal No. 2) and ECM

connector B-10 (terminal No. 21) at ignition coil 4.

e. Ignition coil connector B-05 (terminal No. 2) and ECM

connector B-10 (terminal No. 52) at ignition coil 5.

f. Ignition coil connector B-15 (terminal No. 2) and ECM

connector B-10 (terminal No. 53) at ignition coil 6.

• Should be less than 2 ohms.

Q: Is the measured resistance less than 2 ohms?

YES : Go to Step 6.
NO : Repair it. Then confirm that the malfunction symptom

is eliminated.

16 15 14 13 12 11 10 9 8 7 6 5 4 3

2

1

32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17

48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33

64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49

AK700224

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2

3

AB

B-10 harness
connector:
component side

B-01, B-04, B-05,
B-15, B-18, B-19
harness connector:
component side

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-828

STEP 6. Check for short circuit to ground between ignition
coil connector and ECM connector.
NOTE: Check harness after checking intermediate connectors
A-13 and B-21. If intermediate connectors are damaged, repair
or replace it.
Refer to GROUP 00E, Harness Connector Inspection

P.00E-2

.

Then confirm that the malfunction symptom is eliminated.
(1) Disconnect the ignition coil connector and ECM connector.
(2) Check for the continuity between ignition coil connector and

ground.

a. Ignition coil connector B-01 (terminal No. 1) and ground

at ignition coil 1.

b. Ignition coil connector B-19 (terminal No. 1) and ground

at ignition coil 2.

c. Ignition coil connector B-04 (terminal No. 1) and ground

at ignition coil 3.

d. Ignition coil connector B-18 (terminal No. 1) and ground

at ignition coil 4.

e. Ignition coil connector B-05 (terminal No. 1) and ground

at ignition coil 5.

f. Ignition coil connector B-15 (terminal No. 1) and ground

at ignition coil 6.

• Not continuity.

Q: Is the harness wire in good condition?

YES : Replace the ECM. When the ECM is replaced,

register the ID code. Refer to GROUP 42B, Diagnosis
− ID Codes Registration Judgment Table <Vehicles

with KOS>

P.42B-15

or GROUP 42C, Diagnosis

− ID

Codes Registration Judgment Table <Vehicles with
WCM>

P.42C-10

.

NO : Repair it. Then confirm that the malfunction symptom

is eliminated.

AK700225

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2

3

AB

B-01, B-04, B-05,
B-15, B-18, B-19
harness connector:
component side