Nissan X-Trail 32. Instruction — part 785
P0300, P0301, P0302, P0303, P0304 MISFIRE
EC-269
< DTC/CIRCUIT DIAGNOSIS >
[MR20DD]
C
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EC
N
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P0301, P0302, P0303, P0304
Not applicable
DTC CONFIRMATION PROCEDURE
1.
PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
Will CONSULT be used?
YES
>> GO TO 2.
NO
>> GO TO 4.
2.
PERFORM DTC CONFIRMATION PROCEDURE-1
WITH CONSULT
1.
Start engine and warm it up to normal operating temperature.
2.
Turn ignition switch OFF and wait at least 10 seconds.
3.
Restart engine and let it idle for about 35 minutes.
4.
Check 1st trip DTC.
Is 1st trip DTC detected?
YES
>> Proceed to
.
NO
>> GO TO 3.
3.
PERFORM DTC CONFIRMATION PROCEDURE-2
1.
Turn ignition switch OFF and wait at least 10 seconds.
2.
Start engine and drive the vehicle under similar conditions to (1st trip) Freeze Frame Data for a certain
time. Refer to the table below.
Hold the accelerator pedal as steady as possible.
Similar conditions to (1st trip) Freeze Frame Data mean that the following conditions should be satisfied at
the same time.
Driving time varies according to the engine speed in the freeze frame data.
Engine operating condition in fail-safe mode
Fail safe mode
Vehicle behavior
Traveling con-
trol mode
Accelerator an-
gle variation
control
ECM controls the accelerator pedal depression speed to make it slower than actual speed. This
causes a drop in accelerating performance and encourages the driver to repair malfunction.
NOTE:
ECM does not control the accelerator pedal releasing speed.
Combustion
control mode
Stratified charge
combustion
control at start-
ing
No stratified charge combustion at starting (cold start).
Idle speed con-
trol
Stops feedback control of idle speed and controls with specified speed.
Recovery speed
control at decel-
erating
Stops recovery speed control by the fuel cut at decelerating and controls with specified speed.
Idle neutral con-
trol
Stops idle neutral control.
Engine speed
Engine speed in the freeze frame data
±
400 rpm
Vehicle speed
Vehicle speed in the freeze frame data
±
10 km/h (6 MPH)
Base fuel sched-
ule
Base fuel schedule in the freeze frame data
±
10%
Engine coolant
temperature (T)
condition
When the freeze frame data shows lower than 70
°
C (158
°
F), T should be lower than 70
°
C (158
°
F).
When the freeze frame data shows higher than or equal to 70
°
C (158
°
F), T should be higher than or equal
to 70
°
C (158
°
F).
EC-270
< DTC/CIRCUIT DIAGNOSIS >
[MR20DD]
P0300, P0301, P0302, P0303, P0304 MISFIRE
3.
Check 1st trip DTC.
Is 1st trip DTC detected?
YES
>> Proceed to
.
NO-1
>> To check malfunction symptom before repair: Refer to
GI-44, "Intermittent Incident"
.
NO-2
>> Confirmation after repair: INSPECTION END
4.
PERFORM DTC CONFIRMATION PROCEDURE-3
WITHOUT CONSULT
1.
Start engine and warm it up to normal operating temperature.
2.
Turn ignition switch OFF and wait at least 10 seconds.
3.
Restart engine and let it idle for about 35 minutes.
4.
Check 1st trip DTC.
Is 1st trip DTC detected?
YES
>> Proceed to
.
NO-1
>> To check malfunction symptom before repair: Refer to
GI-44, "Intermittent Incident"
.
NO-2
>> Confirmation after repair: INSPECTION END
Diagnosis Procedure
INFOID:0000000010775173
1.
CHECK FOR INTAKE AIR LEAKAGE AND PCV HOSE
1.
Start engine and run it at idle speed.
2.
Listen for the sound of the intake air leakage.
3.
Check PCV hose connection.
Is intake air leakage detected?
YES
>> Discover air leakage location and repair. Refer to
NO
>> GO TO 2.
2.
CHECK FOR EXHAUST SYSTEM CLOGGING
Stop engine and visually check exhaust tube, three way catalyst and muffler for dents.
Is the inspection result normal?
YES-1 >> With CONSULT: GO TO 3.
YES-2 >> Without CONSULT: GO TO 4.
NO
>> Repair or replace malfunctioning part. Refer to
3.
PERFORM POWER BALANCE TEST
WITH CONSULT
1.
Start engine.
2.
Perform “POWER BALANCE” “ACTIVE TEST” mode with CONSULT.
3.
Check that each circuit produces a momentary engine speed drop.
Is the inspection result normal?
YES
>> GO TO 9.
NO
>> GO TO 4.
4.
CHECK FUNCTION OF FUEL INJECTOR
WITHOUT CONSULT
1.
Start engine.
Engine speed
Time
Around 1,000 rpm
Approximately 20 minutes
Around 2,000 rpm
Approximately 10 minutes
More than 3,000 rpm
Approximately 7 minutes
P0300, P0301, P0302, P0303, P0304 MISFIRE
EC-271
< DTC/CIRCUIT DIAGNOSIS >
[MR20DD]
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2.
Listen to each fuel injector operation.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Perform trouble diagnosis for fuel injector, refer to
.
5.
CHECK FUNCTION OF IGNITION COIL-1
CAUTION:
Perform the following procedure in a place with no combustible objects and good ventilation.
1.
Turn ignition switch OFF.
2.
Remove fuel pump fuse in IPDM E/R to release fuel pressure.
NOTE:
Do not use CONSULT to release fuel pressure, or fuel pressure applies again during the following proce-
dure.
3.
Start engine.
4.
After engine stalls, crank it 2 or 3 times to release all fuel pressure.
5.
Turn ignition switch OFF.
6.
Remove all ignition coil harness connectors to avoid the electrical discharge from the ignition coils.
7.
Remove ignition coil and spark plug of the cylinder to be checked. Refer to
.
8.
Crank engine for 5 seconds or more to remove combustion gas in the cylinder.
9.
Connect spark plug and harness connector to ignition coil.
10. Fix ignition coil using a rope etc. with gap of 13 - 17 mm (0.52 -
0.66 in) between the edge of the spark plug and grounded metal
portion as shown in the figure.
11. Crank engine for approximately 3 seconds, and check whether
spark is generated between the spark plug and the grounded
metal portion.
CAUTION:
• Never place the spark plug and the ignition coil within 50
cm (19.7 in) each other. Be careful not to get an electrical
shock while checking, because the electrical discharge voltage becomes 20 kV or more.
• It might damage the ignition coil if the gap of more than 17 mm (0.66 in) is made.
NOTE:
When the gap is less than 13 mm (0.52 in), a spark might be generated even if the coil is malfunctioning.
Is the inspection result normal?
YES
>> GO TO 9.
NO
>> GO TO 6.
6.
CHECK FUNCTION OF IGNITION COIL-2
1.
Turn ignition switch OFF.
2.
Disconnect spark plug and connect a non-malfunctioning spark plug.
3.
Crank engine for approximately 3 seconds, and recheck whether spark is generated between the spark
plug and the grounded metal portion.
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> Check ignition coil, power transistor and their circuits. Refer to
.
Clicking sound should
be heard.
PBIB3332E
Spark should be gener-
ated.
JMBIA0066GB
Spark should be gener-
ated.
EC-272
< DTC/CIRCUIT DIAGNOSIS >
[MR20DD]
P0300, P0301, P0302, P0303, P0304 MISFIRE
7.
CHECK SPARK PLUG
Check the initial spark plug for fouling, etc.
Is the inspection result normal?
YES
>> Replace spark plug(s) with standard type one(s). Refer
to
.
NO
>> Repair or clean spark plug. Then GO TO 8.
8.
CHECK FUNCTION OF IGNITION COIL-3
1.
Reconnect the initial spark plugs.
2.
Crank engine for approximately 3 seconds, and recheck whether spark is generated between the spark
plug and the grounded portion.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace spark plug(s) with standard type one(s). Refer to
9.
CHECK COMPRESSION PRESSURE
Check compression pressure. Refer to
.
Is the inspection result normal?
YES
>> GO TO 10.
NO
>> Check pistons, piston rings, valves, valve seats and cylinder head gaskets.
10.
CHECK FUEL PRESSURE
1.
Install all removed parts.
2.
Release fuel pressure. Refer to
3.
Set a fuel pressure meter and check fuel pressure. Refer to
Is the inspection result normal?
YES
>> GO TO 12.
NO
>> GO TO 11.
11.
DETECT MALFUNCTIONING PART
Check fuel hoses and fuel tubes for clogging.
Is the inspection result normal?
YES
>> Replace “fuel filter and fuel pump assembly”. Refer to
FL-12, "Removal and Installation"
.
NO
>> Repair or replace malfunctioning part.
12.
CHECK IDLE SPEED AND IGNITION TIMING
Check idle speed and ignition timing.
Idle speed: For procedure, refer to
, for specification, refer to
Ignition timing: For procedure, refer to
, for specification, refer to
Is the inspection result normal?
YES
>> GO TO 13.
NO
>> Perform basic inspection. Refer to
.
13.
CHECK A/F SENSOR 1 INPUT SIGNAL CIRCUIT
1.
Turn ignition switch OFF.
SEF156I
Spark should be generated.
At idle: Approx. 500 kPa (5.0 bar, 5.1 kg/cm
2
, 73 psi)
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