Mitsubishi Outlander XL. Manual - part 302

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 P0302 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 P0303 set?

YES:

 Retry the troubleshooting.

NO:

 The inspection is complete.

DTC P0304: Cylinder 4 Misfire Detected

M11310100221USA0000010000

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-403

DIAGNOSTIC TROUBLE CODE PROCEDURES

DTC SET CONDITIONS

Logic Flow Chart

Start

Monitoring

conditions

Calculate crankshaft

angular acceleration (An)

An < TH

MF

 (Ne, Ec)*

Misfire

Calculate percent misfire (R

MF

)

End

No

No

No

No

No

No

Yes

Yes

Yes

Yes

Yes

Yes

Good

Within 1000rev

R

MF

 > specified value

Malfunction

(exceed std  ×1.5)

Good

Malfunction

(damage the cat.)

Good

R

MF

 > THCD (Ne, Ec)*

Calculate percent misfire (R

MF

)

Within 200rev

(Ne : engine  spee d

* R

MF

 > THCD

Ec : charge  efficienc y
TH

MF

: Threshold  value  for misfir e

TH

CD

: Threshold  value  for catalyst  damage )

ZK603750 AA00

13Ab-404

MULTIPORT INJECTION SYSTEM (MFI) <DIAGNOSIS>

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)].

or

｠

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. 4 cylinder ignition coil spark.

(1)

Remove the No. 4 cylinder ignition coil.

AA00

ZK603365

Spark plug

(2)

Remove  the  No.  4  cylinder  spark  plug  and  connect  to  the
ignition coil.

(3)

Ground the No.4 cylinder 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. 4 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. 4 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.

Q:Are there any abnormalities?

MULTIPORT INJECTION SYSTEM (MFI) <DIAGNOSIS>

13Ab-405

DIAGNOSTIC TROUBLE CODE PROCEDURES

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 P0304 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 P0304 set?

YES:

 Retry the troubleshooting.

NO:

 The inspection is complete.

DTC P0305: Cylinder 5 Misfire Detected

M11310100222USA0000010000

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

13Ab-406

MULTIPORT INJECTION SYSTEM (MFI) <DIAGNOSIS>

DIAGNOSTIC TROUBLE CODE PROCEDURES