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Mitsubishi Outlander GS45X. Manual - part 846

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-317

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 12 g/sec or more.

Judgement Criterion

• Long-term fuel trim has continued to be higher

than +12.5 percent for 5 seconds.

• Short-term fuel trim has continued to be higher

than +7.4 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.

End

Malfunction

Good

AK703881

Start

Yes

Continuous failure

for specified time

Monitoring
conditions

LRN

>= K0

LRN

<= K2

>= K1

<= K3

LRN

: Long-term trim

: 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) <3.0L ENGINE>

13B-318

• Engine coolant temperature is higher than 76°C

(169

°F).

• Mass airflow sensor output is 12 g/sec or less.

Judgement Criterion

• Long-term fuel trim has continued to be higher

than +12.5 percent for 5 seconds.

• 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 Criterion

• Long-term fuel trim has continued to be higher

than +12.5 percent for 5 seconds.

• 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 Criterion

• Long-term fuel trim has continued to be higher

than +12.5 percent for 5 seconds.

• 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 Criterion

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

percent for 2 seconds.

• 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 2, 4, 6) failed.

• Incorrect fuel pressure.

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

• Engine coolant temperature sensor failed.

• 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-319

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 Input

P.13B-139

, DTC

P0103

− Mass Airflow Circuit High Input

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 Problem

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-320

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 Problem

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.