Mitsubishi Outlander GS45X. Manual - part 975

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-833

STEP 1. Check harness connector B-16 at engine oil 
pressure switch and harness connector B-10 at ECM for 
damage.
Q: Is the harness connector in good condition?

YES : Go to Step 2.
NO :  Repair or replace it. Refer to GROUP 00E, Harness 

Connector Inspection 

P.00E-2

. Then confirm that the 

malfunction symptom is eliminated.

STEP 2. Measure the power supply voltage at engine oil 
pressure switch connector B-16.
(1) Disconnect the connector B-16 measure at the harness 

side.

(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between terminal No. 1 and ground.

• The voltage should equal 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 5.
NO :  Go to Step 3.

1

AK700522AB

B-16 harness
connector:
component side

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-834

STEP 3. Check for open circuit or short circuit to ground or 
harness damage between engine oil pressure switch 
connector B-16 and ECM connector B-10.
(1) Disconnect the connector B-16 and B-10 measure at the 

harness side.

(2) Measure the resistance between connector B-16 (terminal 

No. 1) and connector B-10 (terminal No. 36).

• Should be less than 2 ohms.

(3) Check for the continuity between connector B-10 (terminal 

No. 36) and ground.

• Not continuity.

Q: Is the harness wire in good condition?

YES : Then go to Step 4.
NO :  Repair it. Then confirm that the malfunction symptom 

is eliminated.

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2

1

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1

AK700523AB

B-16 harness connector:
component side

B-10 harness connector:
component side

AK700524

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1

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AB

B-10 harness
connector:
component side

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-835

STEP 4. Measure the voltage at ECM connector B-10 by 
using power plant ECU check harness special tool 
MB992110.
(1) Disconnect all ECM connectors. Connect the power plant 

ECU check harness special tool MB992110 between the 
separated connectors.

(2) Measure the voltage between terminal No. 36 and ground.

OK:
1 V or less (ignition switch: ON)
System voltage (during idling)

Q:

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

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

− How to 

Cope with Intermittent Malfunctions 

P.00-15

.

NO :  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

.

AK700249

ECM

AB

Body side harness 

MB992110

AK700525

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2

1

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AB

Special tool 64-pin
connector:
component side 

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-836

STEP 5. Measure the voltage at ECM connector B-10 by 
using power plant ECU check harness special tool 
MB992110.
(1) Disconnect all ECM connectors. Connect the power plant 

ECU check harness special tool MB992110 between the 
separated connectors.

(2) Measure the voltage between terminal No. 36 and ground.

OK:
1 V or less (ignition switch: ON)
System voltage (during idling)

Q:

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

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

− How to 

Cope with Intermittent Malfunctions 

P.00-15

.

NO :  Replace the engine oil pressure switch. Then confirm 

that the malfunction symptom is eliminated.

DATA LIST REFERENCE TABLE

M1131152004469

CAUTION

• When shifting the selector lever to D range, 

the brakes should be applied so that the vehi-
cle does not move forward.

• Driving tests always need two persons: one 

driver and one observer.

NOTE: *

1

: In a new vehicle [driven approximately 

500 km (311 mile) or less], the mass airflow sensor 
output value is sometimes 10% higher than the stan-
dard value.

NOTE: *

2

: The injector drive time represents the time 

when the cranking speed is at 250 r/min or below 
when the power supply voltage is 11 volts.
NOTE: *

3

: In a new vehicle [driven approximately 

500 km (311 mile) or less], the injector drive time is 
sometimes 10% longer than the standard time.
NOTE: *

4

: Vehicles for Canada, the headlight, tail-

light, etc. remain lit even when the lighting switch is 
in "OFF" position but this is no problem for checks.

AK700249

ECM

AB

Body side harness 

MB992110

AK700525

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2

1

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AB

Special tool 64-pin
connector:
component side 

M.U.T.-III 
SCAN 
TOOL 
DISPLAY

ITEM 
NO. 

INSPECTION 
ITEM

INSPECTION REQUIREMENT

NORMAL 
CONDITION

INSPECTION 
PROCEDURE 
NO.

REFERENCE 
PAGE

A/C 
compress
or relay

93

A/C 
compressor 
clutch relay

• Engine: warming up, idling

• A/C switch: "OFF"

OFF

Procedure 
No. 25

P.13B-829

• Engine: 

warming up, 
idling

• A/C switch: 

"ON"

A/C 
compressor 
clutch is not 
operating

OFF

A/C 
compressor 
clutch is 
operating

ON