Mitsubishi Outlander GS45X. Manual - part 815

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-193

STEP 3. 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 : Replace the engine coolant temperature sensor. Then 

go to Step 5.

NO :  Go to Step 4.

AK700231

AK700232 AB

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-194

STEP 4. 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 : 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

. Then go to step 5.

NO :  Repair it. 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 22 

P.13B-11

.

(2) Check the diagnostic trouble code (DTC).
Q: Is DTC P0118 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

.

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-195

DTC P0121: Throttle Position Sensor (main) Plausibility

.

TECHNICAL DESCRIPTION

Compare the actual measurement of volumetric effi-
ciency by a mass airflow sensor signal with volumet-
ric efficiency estimated from a throttle position 
sensor (main) signal.

.

MONITOR EXECUTION

Continuous

.

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)

• Not applicable

.

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-196

DTC SET CONDITIONS

Logic Flow Chart

Check Conditions

• The difference between the actual volumetric effi-

ciency and the volumetric efficiency estimated by 
the throttle position sensor (main) is 0 % or more. 
Or, the volumetric efficiency is 60 % or less.

• The engine speed is between 750 and 3,000 

r/min. Or, the throttle position sensor (main) out-
put voltage is 3 volts or less.

Judgment Criterion

• For 0.4 second, the difference between the actual 

volumetric efficiency and the volumetric efficiency 
estimated by the throttle position sensor (main) is 
33 % or more.

.

OBD-II DRIVE CYCLE PATTERN

Refer to Diagnostic Function 

− OBD-II Drive Cycle 

Pattern 17 

P.13B-11

.

.

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

• Throttle position sensor (main) system failed.

• Intake system vacuum leak.

• There is some foreign matter around mass air-

flow sensor.

• ECM failed.

AK604351

Start

Yes

Yes

Yes

No

No

No

Continuous failure

for specified time

Malfunction

End

Good

Monitoring
conditions

|Ec-calculated Ec| 
> specified value

Ec: load value