Mitsubishi Outlander GS45X. Manual - part 598

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-215

STEP 9. Check harness connector B-10 at ECM for 
damage.
Q: Is the harness connector in good condition?

YES : Go to Step 10.
NO :  Repair or replace it. Refer to GROUP 00E, Harness 

Connector Inspection 

P.00E-2

. Then go to Step 14.

STEP 10. Check for harness damage between engine 
coolant temperature sensor connector B-09 (terminal No. 
2) and ECM connector B-10 (terminal No. 27).
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 Code Registration Judgment Table <Vehicles 

with KOS> 

P.42B-15

 or GROUP 42C, Diagnosis 

− ID 

Codes Registration Judgment Table <Vehicles with 
WCM> 

P.42C-10

. Then go to Step 14.

NO :  Repair it. Then go to Step 14.

STEP 11. Check the engine coolant temperature sensor.
Refer to Engine Coolant Temperature Sensor 

P.13A-874

.

Q: Is the engine coolant temperature sensor normal?

YES : Go to Step 12.
NO :  Replace the engine coolant temperature sensor. Then 

go to Step 14.

STEP 12. Check harness connector B-10 at ECM for 
damage.
Q: Is the harness connector in good condition?

YES : Go to Step 13.
NO :  Repair or replace it. Refer to GROUP 00E, Harness 

Connector Inspection 

P.00E-2

. Then go to Step 14.

STEP 13. Check for harness damage between engine 
coolant temperature sensor connector B-09 (terminal No. 
1) and ECM connector B-10 (terminal No. 26).
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 Code Registration Judgment Table <Vehicles 

with KOS> 

P.42B-15

 or GROUP 42C, Diagnosis 

− ID 

Codes Registration Judgment Table <Vehicles with 
WCM> 

P.42C-10

. Then go to Step 14.

NO :  Repair it. Then go to Step 14.

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-216

STEP 14. Test the OBD-II drive cycle.
(1) Carry out a test drive with the drive cycle pattern. Refer to 

Diagnostic Function 

− OBD-II Drive Cycle − Pattern 9 

P.13A-11

.

(2) Check the diagnostic trouble code (DTC).
Q: Is DTC P0125 set?

YES : Retry the troubleshooting.
NO :  The inspection is complete.

DTC P0128: Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature)

.

TECHNICAL DESCRIPTION

• The ECM checks the time for the cooling water 

temperature to reach the judgement temperature.

.

DESCRIPTIONS OF MONITOR METHODS

Engine coolant temperature does not reach 77

°C 

(171

°F) within specified period after cold start.

.

MONITOR EXECUTION

Once per driving cycle

.

MONITOR EXECUTION CONDITIONS 
(Other monitor and Sensor)

Other Monitor (There is no temporary DTC stored 

in memory for the item monitored below)

• Not applicable

Sensor (The sensor below is determined to be 

normal)

• Mass airflow sensor

• Engine coolant temperature sensor

• Intake air temperature sensor

.

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-217

DTC SET CONDITIONS
Logic Flow Chart

.

Check Conditions

• Engine coolant temperature is between −10°C 

(14

°F) and 60°C (140°F) when the engine is 

started.

• Intake air temperature is −10°C (14°F) or higher 

when the engine is started.

• The intake air temperature subtracted from the 

intake air temperature when the engine is started 
is 10

°C (18°F) or less.

• The total time when the amount of intake air is 

small is less than the specified time.

Judgement Criterion

• After the estimated engine coolant temperature 

rises above 77

°C (171°F), the actual engine cool-

ant temperature is less than 77

°C (171°F) even 

though the specified time has passed.

.

OBD-II DRIVE CYCLE PATTERN

• Refer to Diagnostic Function − OBD-II Drive 

Cycle 

− Pattern 10 

P.13A-11

.

.

TROUBLESHOOTING HINTS (The most 
likely causes for this code to be set are:)

• The engine cooling system is faulty.

• ECM failed. 

End

Yes

Malfunction

Estimate engine coolant temp.

Good

Specified time has passed?

No

No

 

Monitoring 
conditions

Actual engine coolant
temp. >= 77˚C (171˚F)

Estimated engine coolant

temp. >= 77˚C (171˚F)

No

AK900356

Start

Yes

No

Yes

YES

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-218

DIAGNOSIS

STEP 1. Check the cooling system.
Refer to GROUP 14, Engine Cooling Diagnosis 

− Symptom 

Chart 

P.14-4

.

Q: Is the cooling system normal?

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

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

with KOS> 

P.42B-15

 or GROUP 42C, Diagnosis 

− ID 

Codes Registration Judgment Table <Vehicles with 
WCM> 

P.42C-10

. Then go to Step 2.

NO :  Repair it. Then go to Step 2.

STEP 2. Test the OBD-II drive cycle.
(1) Carry out test drive with the drive cycle pattern. Refer to 

Diagnostic Function 

− OBD-II Drive Cycle − Pattern 10 

P.13A-11

.

(2) Check the diagnostic trouble code (DTC).
Q: Is DTC P0128 set?

YES : Retry the troubleshooting.
NO :  The inspection is complete.

DTC P0130: Linear Air-Fuel Ratio Sensor Circuit

.

TECHNICAL DESCRIPTION

• The ECM effects air/fuel ratio feedback control in 

accordance with the signals from the linear 
air-fuel ratio sensor.

• If the linear air-fuel ratio sensor has deteriorated, 

corrections will be made by the heated oxygen 
sensor (rear).

.

AK704090AB

Connector: B-10

B-10 (GR)

AK704089AD

Linear air-fuel
ratio sensor

SRS-ECU

Connector: C-142

C-142 (B)