Mitsubishi Outlander XL. Manual - part 279

YES:

Replace the ECM. When the ECM is replaced, register

the ID code. Refer to GROUP 42B, ID Code Registration
Judgment Table <Vehicles with KOS> P.42B-12or GROUP
42C, ID Code Registration Judgment Table <Vehicles with
WCM> P.42C-8. Then go to Step 13.

NO:

The inspection is complete.

STEP 13. 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.
13Ab-8.

(2)

Check the diagnostic trouble code (DTC).

Q:Is DTC P0174 set?

YES:

Retry the troubleshooting.

NO:

The inspection is complete.

DTC P0175: System too Rich (bank 2)

M11310100205USA0000010000

Fuel Trim Circuit

｠

Refer to DTC P0202- Injector Circuit - Cylinder 2 P.
13Ab-340, P0204- Injector Circuit - Cylinder 4 P.
13Ab-355, P0206- Injector Circuit - Cylinder 6 P.
13Ab-370.

CIRCUIT OPERATION

｠

Refer to DTC P0202- Injector Circuit - Cylinder 2 P.
13Ab-340, P0204- Injector Circuit - Cylinder 4 P.
13Ab-355, P0206- Injector Circuit - Cylinder 6 P.
13Ab-370.

TECHNICAL DESCRIPTION

｠

If a malfunction occurs in the fuel system, the fuel
trim value becomes too small.

｠

The ECM checks whether the fuel trim value is
within a specified range.

DESCRIPTIONS OF MONITOR METHODS
Left bank air/fuel learning value (long time fuel trim)
and air/fuel feedback integral value (short time fuel
trim) are too rich.

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)

｠

Misfire monitor

Sensor (The sensor below is determined to be
normal)

｠

Mass airflow sensor

｠

Engine coolant temperature sensor

｠

Intake air temperature sensor

｠

Barometric pressure sensor

｠

Throttle position sensor

MULTIPORT INJECTION SYSTEM (MFI) <DIAGNOSIS>

13Ab-311

DIAGNOSTIC TROUBLE CODE PROCEDURES

DTC SET CONDITIONS

Logic Flow Chart

L rn

: Long-te rm trim

: Sho rt-te rm trim

: Maxi m um limit of long-te rm trim

: Maxi m um limit of sho rt-te rm trim

: Mini m um limit of long-te rm trim

: Mini m um limit of sho rt-te rm trim

Start

Monitoring

conditions

End

Yes

L rn

> K0

Malfunction

Good

L rn

< K

> K

Conti nuous failur e

for 2sec s

ZK603728 AA00

Check Conditions

｠

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 lower than
-12.5 percent for 5 seconds.

｠

Short-term fuel trim has continued to be lower than
-7.4 percent for 5 seconds.

Check Conditions

｠

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 lower than
-12.5 percent for 5 seconds.

13Ab-312

MULTIPORT INJECTION SYSTEM (MFI) <DIAGNOSIS>

DIAGNOSTIC TROUBLE CODE PROCEDURES

｠

Short-term fuel trim has continued to be lower than
-12.5 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 -50.0
percent for 2 seconds.

OBD-II DRIVE CYCLE PATTERN

Refer to Diagnostic Function - OBD-II Drive Cycle -
Pattern 22 P.13Ab-8.

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.

｠

Engine coolant temperature sensor failed.

｠

Intake air temperature sensor failed.

｠

Manifold absolute pressure sensor failed.

｠

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

ZC501967

AC404789

ZC5019680000

MB991824

MB991827

MB991910

Data link

connector

To prevent damage to scan tool MB991958, always turn the
ignition switch to the "LOCK" (OFF) position before
connecting 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.13Ab-108, DTC P0102 - Mass Airflow
Circuit Low Input P.13Ab-115, DTC P0103 - Mass Airflow
Circuit High Input P.13Ab-121.

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.

MULTIPORT INJECTION SYSTEM (MFI) <DIAGNOSIS>

13Ab-313

DIAGNOSTIC TROUBLE CODE PROCEDURES

｠

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.13Ab-143, DTC P0112 - Intake
Air Temperature Circuit Low Input P.13Ab-148, DTC P0113 -
Intake Air Temperature Circuit High Input P.13Ab-152.

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.13Ab-158, DTC P0117 -
Engine Coolant Temperature Circuit Low Input P.13Ab-163,
DTC P0118 - Engine Coolant Temperature Circuit High
Input P.13Ab-168.

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.13Ab-126DTC P0107 -
Manifold Absolute Pressure Circuit Low Input P.13Ab-132,
DTC P0108 -Manifold Absolute Pressure Circuit High
Input P.13Ab-138.

STEP 5. Check the fuel pressure.
Refer to On-vehicle Service - Fuel Pressure Test P.13Aa-17.

Q:Is the fuel pressure normal?

13Ab-314

MULTIPORT INJECTION SYSTEM (MFI) <DIAGNOSIS>

DIAGNOSTIC TROUBLE CODE PROCEDURES

Content .. 277 278 279 280 ..