Mitsubishi Outlander GS45X. Manual - part 610

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-263

DTC SET CONDITIONS
Logic Flow Chart

.

Check Conditions

• Engine coolant temperature is lower than 100°C 

(212

°F) when the engine is started.

• Intake air temperature is lower than 60°C (140°F) 

when the engine is started.

• Under the closed loop air/fuel ratio control.

• Engine coolant temperature is higher than 76°C 

(169

°F).

• Mass airflow sensor output is 9 g/sec or more.

Judgement Criterion

• Long-term fuel trim has continued to be higher 

than +12.5 percent for 5 seconds.

or

• Short-term fuel trim has continued to be higher 

than +5.5 percent for 5 seconds.

Check Conditions

• Engine coolant temperature is lower than 100°C 

(212

°F) when the engine is started.

• Intake air temperature is lower than 60°C (140°F) 

when the engine is started.

• Under the closed loop air/fuel ratio control.

• Engine coolant temperature is higher than 76°C 

(169

°F).

• Mass airflow sensor output is 9 g/sec or less.

End

No

No

No

No

No

No

Malfunction

Good

AK604328

Start

Yes

Yes

Yes

Yes

Yes

Yes

Continuous

failure for 5secs

Monitoring
conditions

K

LRN

 >= K0

K

LRN

 <= K2

K

I

 >= K1

K

I

 <= K3

K

LRN

: Long-term trim

K

I      

: Short-term trim

K0   : Maximum limit of long-term trim

K2   : Minimum limit of long-term trim

K1   : Maximum limit of short-term trim

K3   : Minimum limit of short-term trim

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-264

Judgement Criterion

• Long-term fuel trim has continued to be higher 

than +12.5 percent for 5 seconds.

or

• Short-term fuel trim has continued to be higher 

than +10.5 percent for 5 seconds.

Check Conditions

• Engine coolant temperature is higher than 100°C 

(212

°F) when the engine is started.

• Intake air temperature is higher than 60°C 

(140

°F) when the engine is started.

• Under the closed loop air/fuel ratio control.

• Engine coolant temperature is higher than 76°C 

(169

°F).

• Mass airflow sensor output is 9 g/sec or more.

Judgement Criterion

• Long-term fuel trim has continued to be higher 

than +12.5 percent for 5 seconds.

or

• Short-term fuel trim has continued to be higher 

than +15.6 percent for 5 seconds.

Check Conditions

• Engine coolant temperature is higher than 100°C 

(212

°F) when the engine is started.

• Intake air temperature is higher than 60°C 

(140

°F) when the engine is started.

• Under the closed loop air/fuel ratio control.

• Engine coolant temperature is higher than 76°C 

(169

°F).

• Mass airflow sensor output is 9 g/sec or less.

Judgement Criterion

• Long-term fuel trim has continued to be higher 

than +12.5 percent for 5 seconds.

or

• Short-term fuel trim has continued to be higher 

than +20.7 percent for 5 seconds.

Check Conditions

• Engine coolant temperature is higher than 76°C 

(169

°F).

• Under the closed loop air/fuel ratio control.

Judgement Criterion

• Long-term fuel trim has continued to be +12.5 

percent for 2 seconds.

or

• Short-term fuel trim has continued to be +25.0 

percent for 2 seconds.

.

OBD-II DRIVE CYCLE PATTERN

Refer to Diagnostic Function 

− OBD-II Drive Cycle − 

Pattern 21 

P.13A-11

.

.

TROUBLESHOOTING HINTS (The most likely 

causes for this code to be set are:)

• Mass airflow sensor failed.

• Injector failed.

• Incorrect fuel pressure.

• Air drawn in from gaps in gasket, seals, etc.

• Engine coolant temperature sensor failed.

• Intake air temperature sensor failed.

• Barometric pressure sensor failed.

• Manifold absolute pressure sensor failed.

• Exhaust leak.

• Use of incorrect or contaminated fuel.

• Injector circuit harness damage, or connector 

damage.

• ECM failed. 

DIAGNOSIS

Required Special Tools:

• MB991958: Scan Tool (M.U.T.-III Sub Assembly)

• MB991824: V.C.I.

• MB991827: USB Cable

• MB991910: Main Harness A

STEP 1. Check for exhaust leak.
Q: Are there any abnormalities?

YES : Repair it. Then go to Step 14.
NO :  Go to Step 2.

STEP 2. Check for intake system vacuum leak.
Q: Are there any abnormalities?

YES : Repair it. Then go to Step 14.
NO :  Go to Step 3.

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-265

STEP 3. Using scan tool MB991958, check data list item 10: 
Mass Airflow Sensor.

CAUTION

To prevent damage to scan tool MB991958, always turn the 
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958 to the data link connector.
(2) Start the engine and run at idle.
(3) Set scan tool MB991958 to the data reading mode for item 

10, Mass Airflow Sensor.

(4) Warm up the engine to normal operating temperature: 80

°C 

to 95

°C (176°F to 203°F).

• When idling, between 1,350 and 1,670 millivolts.

• When 2,500 r/min, between 1,620 and 2,020 millivolts.

(5) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the sensor operating properly?

YES : Go to Step 4.
NO :  Refer to DTC P0101 

− Mass Airflow Circuit 

Range/Performance Problem 

P.13A-121

, DTC P0102 

− Mass Airflow Circuit Low Input 

P.13A-127

, DTC 

P0103 

− Mass Airflow Circuit High Input 

P.13A-134

.

STEP 4. Using scan tool MB991958, check data list item 5: 
Intake Air Temperature Sensor.
(1) Turn the ignition switch to the "ON" position.
(2) Set scan tool MB991958 to the data reading mode for item 

5, Intake Air Temperature Sensor.

• The intake air temperature and temperature shown with 

the scan tool should approximately match.

(3) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the sensor operating properly?

YES : Go to Step 5.
NO :  Refer to DTC P0111 

− Intake Air Temperature Circuit 

Range/Performance Problem 

P.13A-161

, DTC P0112 

− Intake Air Temperature Circuit Low Input 

P.13A-167

, DTC P0113 

− Intake Air Temperature 

Circuit High Input 

P.13A-171

.

AK700568AB

MB991824

MB991827

MB991910

Data link
connector

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-266

STEP 5. Using scan tool MB991958, check data list item 6: 
Engine Coolant Temperature Sensor.
(1) Turn the ignition switch to the "ON" position.
(2) Set scan tool MB991958 to the data reading mode for item 

6, Engine Coolant Temperature Sensor.

• The engine coolant temperature and temperature 

shown with the scan tool should approximately match.

(3) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the sensor operating properly?

YES : Go to Step 6.
NO :  Refer to DTC P0116 

− Engine Coolant Temperature 

Circuit Range/Performance Problem

P.13A-177

, DTC 

P0117 

− Engine Coolant Temperature Circuit Low 

Input 

P.13A-183

, DTC P0118 

− Engine Coolant 

Temperature Circuit High Input 

P.13A-187

.

STEP 6. Using scan tool MB991958, check data list item 8: 
Manifold Absolute Pressure Sensor.
(1) Turn the ignition switch the "ON" position.
(2) Set scan tool MB991958 to the data reading mode for item 

8, Manifold Absolute Pressure Sensor.

• When altitude is 0 m (0 foot), 101 kPa (29.8 in.Hg).

• When altitude is 600 m (1,969 feet), 95 kPa (28.1 in.Hg).

• When altitude is 1,200 m (3,937 feet), 88 kPa (26.0 

in.Hg).

• When altitude is 1,800 m (5,906 feet), 81 kPa (23.9 

in.Hg).

(3) Start the engine.

• When the engine is idling, 16 − 36 kPa (4.7 − 10.6 

in.Hg).

• When the engine is suddenly revved, manifold absolute 

pressure varies.

(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the sensor operating properly?

YES : Go to Step 7.
NO :  Refer to DTC P0106 

− Manifold Absolute Pressure 

Circuit Range/Performance Problem 

P.13A-139

, DTC 

P0107 

− Manifold Absolute Pressure Circuit Low 

Input 

P.13A-148

, DTC P0108 

− Manifold Absolute 

Pressure Circuit High Input 

P.13A-156

.

STEP 7. Check harness connector B-101, B-120, B-103 and 
B-116 at injector for damage.
Q:  Is the harness connector in good condition?

YES : Go to Step 8.
NO :  Repair or replace it. Refer to GROUP 00E, Harness 

Connector Inspection 

P.00E-2

. Then go to Step 14.