Mitsubishi Outlander GS45X. Manual - part 843

 

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Mitsubishi Outlander GS45X. Manual - part 843

 

 

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-305

Judgement Criteria

• 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 +12.5 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 12 g/sec or more.

Judgement Criteria

• Long-term fuel trim has continued to be higher 

than +12.5 percent or 5 seconds.

or

• Short-term fuel trim has continued to be higher 

than +17.6 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 12 g/sec or less.

Judgement Criteria

• Long-term fuel trim has continued to be higher 

than +12.5 percent or 5 seconds.

or

• Short-term fuel trim has continued to be higher 

than +22.3 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 Criteria

• 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 20 

P.13B-11

.

.

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

• Mass airflow sensor failed.

• Injector (Number 1, 3, 5) failed.

• Incorrect fuel pressure.

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

• Intake air temperature sensor failed.

• Manifold absolute pressure sensor failed.

• Exhaust leak.

• Use of incorrect or contaminated fuel.

• Harness damage.

• 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

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-306

STEP 1. 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 2.
NO :  Refer to DTC P0101 

− Mass Airflow Circuit 

Range/Performance Problem 

P.13B-132

, DTC P0102 

− Mass Airflow Circuit Low Inpu

P.13B-139

, DTC 

P0103 

− Mass Airflow Circuit High Inpu

P.13B-145

.

STEP 2. 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 3.
NO :  Refer to DTC P0111 

− Intake Air Temperature Circuit 

Range/Performance Proble

P.13B-167

, DTC P0112 

− Intake Air Temperature Circuit Low Input 

P.13B-171

, DTC P0113 

− Intake Air Temperature 

Circuit High Input 

P.13B-175

.

AK700568AB

MB991824

MB991827

MB991910

Data link
connector

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-307

STEP 3. 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 4.
NO :  Refer to DTC P0116 

− Engine Coolant Temperature 

Circuit Range/Performance Proble

P.13B-180

, DTC 

P0117 

− Engine Coolant Temperature Circuit Low 

Input 

P.13B-185

, DTC P0118 

− Engine Coolant 

Temperature Circuit High Input 

P.13B-189

.

STEP 4. Using scan tool MB991958, check data list item 8: 
Manifold Absolute Pressure Sensor.
(1) Connect scan tool MB991958 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) 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).

(4) 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.

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

YES : Go to Step 5.
NO :  Refer to DTC P0106 

− Manifold Absolute Pressure 

Circuit Range / Performance Problem 

P.13B-150

DTC P0107 

− Manifold Absolute Pressure Circuit Low 

Input 

P.13B-156

, DTC P0108 

−Manifold Absolute 

Pressure Circuit High Input 

P.13B-162

.

STEP 5. Check the fuel pressure.
Refer to On-vehicle Service 

− Fuel Pressure Test 

P.13B-883

Q: Is the fuel pressure normal?

YES : Go to Step 6.
NO :  Repair it. Then go to Step 16.

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-308

STEP 6. Check for harness connector B-21 at the 
intermediate connector and harness connector B-10 at the 
ECM for damage.
Q: Is the harness connector in good condition?

YES : Go to Step 7.
NO :  Repair it. Refer to GROUP 00E, Harness Connector 

Inspection 

P.00E-2

. Then go to Step 16.

STEP 7. Measure the injector supply voltage at the 
intermediate connector harness B-21 and ground.
(1) Disconnect the intermediate connector B-21 and measure 

at the harness side.

(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between each male connector side 

terminal and ground.

a. Connector B-21 (terminal No. 7) and ground.
b. Connector B-21 (terminal No. 8) and ground.

c. Connector B-21 (terminal No. 9) and ground.

• Voltage should be battery positive voltage.

(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the measured voltage battery positive voltage?

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

Inspection 

P.00E-2

. Then go to Step 16.

STEP 8. Check the right bank injector resistance at the 
intermediate connector B-21.
(1) Disconnect the intermediate connector B-21.
(2) Measure the resistance between each male connector side 

terminal.

a. Measure the resistance between terminal No. 6 and No. 

7 at No. 1 cylinder injector.

b. Measure the resistance between terminal No. 6 and No. 

8 at No. 3 cylinder injector.

c. Measure the resistance between terminal No. 6 and No. 

9 at No. 5 cylinder injector.

• Resistance should be between 10.5 and 13.5 ohms

[at 20

°C (68°F)].

Q: Is the measured resistance between 10.5 and 13.5 ohms 

[at 20

°C (68°F)]?

YES : Go to Step 11.
NO :  Go to Step 9.

STEP 9. Check for harness connector B-101, B-103, B-104 
at right bank injector 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 16.

1 2 3

6 7 8

4 5

9 10

AK700291AB

B-21 harness
connector:
harness side

AK700205

1

2 3

6

7 8

4 5

9 10

AB

B-21
Injector side
connector

 

 

 

 

 

 

 

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