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Mitsubishi Outlander XL. Manual - part 303

DTC SET CONDITIONS

Logic Flow Chart

Start

Monitoring

conditions

Calculate crankshaft

angular acceleration (An)

An < TH

(Ne, Ec)*

Misfire

Calculate percent misfire (R

)

End

Yes

Good

Within 1000rev

> specified value

Malfunction

(exceed std ×1.5)

Good

Malfunction

(damage the cat.)

Good

> THCD (Ne, Ec)*

Calculate percent misfire (R

)

Within 200rev

(Ne : engine spee d

* R

> THCD

Ec : charge efficienc y
TH

: Threshold value for misfir e

: Threshold value for catalyst damage )

ZK603750 AA00

MULTIPORT INJECTION SYSTEM (MFI) <DIAGNOSIS>

13Ab-407

DIAGNOSTIC TROUBLE CODE PROCEDURES

Check Conditions

｠

Engine speed is between 440 and 6,500 r/min.

｠

Engine coolant temperature is higher than -10°C
(14°F).

｠

Barometric pressure is higher than 76 kPa (22.4
in.Hg).

｠

Volumetric efficiency is at between 30 and 60
percent.

｠

Adaptive learning is complete for the vane which
generates a crankshaft position signal.

｠

While the engine is running, excluding gear shifting,
deceleration, sudden acceleration/deceleration and
A/C compressor switching.

｠

The throttle deviation is -0.06 V/10 ms to +0.06 V/
10 ms.

Judgement Criteria (change in the angular
acceleration of the crankshaft is used for misfire
detection).

｠

Misfire has occurred more frequently than allowed
during the last 200 revolutions [when the catalyst
temperature is higher than 1,000°C (1,832°F)].

｠

Misfire has occurred in 15 or more of the last 1,000
revolutions (corresponding to 1.5 times the limit of
emission standard).

OBD-II DRIVE CYCLE PATTERN
Refer to Diagnostic Function - OBD-II Drive Cycle -
Pattern 15 P.13Ab-8.

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

｠

Spark plug failed.

｠

Ignition system related part(s) failed.

｠

Low compression pressure.

｠

ECM failed.

DIAGNOSIS

STEP 1. Check the No. 5 cylinder ignition coil spark.

(1)

Remove the No. 5 cylinder intake manifold.

(2)

Remove the No. 5 cylinder ignition coil.

AA00

ZK603365

Spark plug

(3)

Remove the No. 5 cylinder spark plug and connect to the
ignition coil.

(4)

Ground the spark plug side electrode securely.

｠

When the engine is cranked, the spark plug should spark.

Q:Did it spark?

YES:

Go to Step 3.

NO:

Go to Step 2.

STEP 2. Check the No. 5 cylinder spark plugs.
Refer to GROUP 16, Ignition System - On-vehicle Service -
Spark Plug Check And Cleaning P.16c-4.

Q:Is the spark plug normal?

YES:

Refer to, INSPECTION PROCEDURE 24 - Ignition Circuit

System P.13Ab-826.

NO:

Replace the No. 5 cylinder spark plug. Then go to

Step 5.

STEP 3. Check the compression.
Refer to GROUP 11A, On-vehicle Service - Compression
Pressure Check P.11A-17.

13Ab-408

MULTIPORT INJECTION SYSTEM (MFI) <DIAGNOSIS>

DIAGNOSTIC TROUBLE CODE PROCEDURES

Q:Are there any abnormalities?

YES:

Replace it. Then go to Step 5.

NO:

Go to Step 4.

STEP 4. Check the trouble symptoms.

(1)

Carry out a test drive with the drive cycle pattern. Refer to
Diagnostic Function - OBD-II Drive Cycle - Pattern 15 P.
13Ab-8.

(2)

Check the diagnostic trouble code (DTC).

Q:Is DTC P0305 set?

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 5.

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.

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 15 P.
13Ab-8.

(2)

Check the diagnostic trouble code (DTC).

Q:Is DTC P0305 set?

YES:

Retry the troubleshooting.

NO:

The inspection is complete.

DTC P0306: Cylinder 6 Misfire Detected

M11310100223USA0000010000

TECHNICAL DESCRIPTION

｠

If a misfire occurs while the engine is running, the
engine speed changes for an instant.

｠

The ECM checks for such changes in engine speed.

DESCRIPTIONS OF MONITOR METHODS
Monitor angular acceleration of crankshaft and detect
malfunction when negative variation of the angular
acceleration is large.

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)

｠

Camshaft position sensor

｠

Mass airflow sensor

｠

Engine coolant temperature sensor

｠

Intake air temperature sensor

｠

Barometric pressure sensor

｠

Throttle position sensor

MULTIPORT INJECTION SYSTEM (MFI) <DIAGNOSIS>

13Ab-409

DIAGNOSTIC TROUBLE CODE PROCEDURES

DTC SET CONDITIONS

Logic Flow Chart

Start

Monitoring

conditions

Calculate crankshaft

angular acceleration (An)

An < TH

(Ne, Ec)*

Misfire

Calculate percent misfire (R

)

End

Yes

Good

Within 1000rev

> specified value

Malfunction

(exceed std ×1.5)

Good

Malfunction

(damage the cat.)

Good

> THCD (Ne, Ec)*

Calculate percent misfire (R

)

Within 200rev

(Ne : engine spee d

* R

> THCD

Ec : charge efficienc y
TH

: Threshold value for misfir e

: Threshold value for catalyst damage )

ZK603750 AA00

13Ab-410

MULTIPORT INJECTION SYSTEM (MFI) <DIAGNOSIS>

DIAGNOSTIC TROUBLE CODE PROCEDURES

Content .. 301 302 303 304 ..