Mitsubishi Outlander GS45X. Manual - part 821

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-217

STEP 3. Check for harness between the engine coolant 
temperature sensor connector B-09 and the ECM 
connector B-10.
(1) Disconnect the engine coolant temperature sensor 

connector B-09 and the ECM connector B-10.

(2) Measure the resistance between the engine coolant 

temperature sensor connector B-09 and the ECM 
connector B-10.

a. Connector B-09 (terminal No. 1) and Connector B-10 

(terminal No. 26).

b. Connector B-09 (terminal No. 2) and Connector B-10 

(terminal No. 27).

• Should be less than 2 ohms.

Q: Is the harness wire in good condition?

YES : Go to Step 4.
NO :  Repair it. Then go to Step 5.

AK700234

1

2

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

AB

B-09 harness
connector:
component side 

B-10 harness
connector:
component side 

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-218

STEP 4. Check the engine coolant temperature sensor.
(1) Disconnect the engine coolant temperature sensor 

connector B-09.

(2) Remove the engine coolant temperature sensor.
(3) With the temperature sensing portion of engine coolant 

temperature sensor immersed in hot water, check 
resistance.

Standard value:

14 

− 17 kΩ [at −20°C (−4°F)]

5.1 

− 6.5 kΩ [at 0°C (32°F)]

2.1 

− 2.7 kΩ [at 20°C (68°F)]

0.9 

− 1.3 kΩ [at 40°C (104°F)]

0.48 

− 0.68 kΩ [at 60°C (140°F)]

0.26 

− 0.36 kΩ [at 80°C (176°F)]

(4) Apply 3M

™ AAD part number 8731 or equivalent on the 

screw section of the engine coolant temperature sensor.

(5) Install the engine coolant temperature sensor, and tighten 

to the specified torque.

Tightening torque: 29 

± 10 N⋅m (22 ± 7 ft-lb)

Q: Is the measured resistance at the standard value?

YES : Go to Step 5.
NO :  Replace the engine coolant temperature sensor. Then 

go to Step 5.

STEP 5. 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.13B-11

.

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

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 :  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

.

AK700231

AK700232 AB

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-219

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 judgment 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) <3.0L ENGINE>

13B-220

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.

• The intake air temperature when the engine is 

started 

− intake air temperature 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.13B-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