Nissan Almera Tino V10. Instruction — part 377
EC-334
[QG (WITH EURO-OBD)]
DTC P0300 - P0304 MULTIPLE CYLINDER MISFIRE, NO. 1 - 4 CYLINDER MIS-
FIRE
DTC P0300 - P0304 MULTIPLE CYLINDER MISFIRE, NO. 1 - 4 CYLINDER MIS-
FIRE
PFP:00000
On Board Diagnosis Logic
EBS00QMZ
When a misfire occurs, engine speed will fluctuate. If the engine speed fluctuates enough to cause the crank-
shaft position (CKP) sensor (POS) signal to vary, ECM can determine that a misfire is occurring.
The misfire detection logic consists of the following two conditions.
1.
One Trip Detection Logic (Three Way Catalyst Damage)
On the first trip that a misfire condition occurs that can damage the three way catalyst (TWC) due to over-
heating, the MI will blink.
When a misfire condition occurs, the ECM monitors the CKP sensor (POS) signal every 200 engine revo-
lutions for a change.
When the misfire condition decreases to a level that will not damage the TWC, the MI will turn off.
If another misfire condition occurs that can damage the TWC on a second trip, the MI will blink.
When the misfire condition decreases to a level that will not damage the TWC, the MI will remain on.
If another misfire condition occurs that can damage the TWC, the MI will begin to blink again.
2.
Two Trip Detection Logic (Exhaust quality deterioration)
For misfire conditions that will not damage the TWC (but will affect vehicle emissions), the MI will only light
when the misfire is detected on a second trip. During this condition, the ECM monitors the CKP sensor
signal every 1,000 engine revolutions.
A misfire malfunction can be detected on any one cylinder or on multiple cylinders.
DTC Confirmation Procedure
EBS00QN0
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If “DTC Confirmation Procedure” has been previously conducted, always turn ignition switch “OFF” and wait at
least 10 seconds before conducting the next test.
Sensor
Input Signal to ECM
ECM function
Crankshaft position sensor (POS)
Engine speed
On board diagnosis of misfire
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P0300
0300
Multiple cylinder misfire
detected
Multiple cylinder misfire.
●
Improper spark plug
●
Insufficient compression
●
Incorrect fuel pressure
●
The injector circuit is open or shorted
●
Fuel injectors
●
Intake air leak
●
The ignition signal circuit is open or
shorted
●
Lack of fuel
●
Drive plate or flywheel
●
Heated oxygen sensor 1
●
Incorrect PCV hose connection
P0301
0301
No.1 cylinder misfire
detected
No. 1 cylinder misfires.
P0302
0302
No. 2 cylinder misfire
detected
No. 2 cylinder misfires.
P0303
0303
No. 3 cylinder misfire
detected
No. 3 cylinder misfires.
P0304
0304
No. 4 cylinder misfire
detected
No. 4 cylinder misfires.
DTC P0300 - P0304 MULTIPLE CYLINDER MISFIRE, NO. 1 - 4 CYLINDER MIS-
FIRE
EC-335
[QG (WITH EURO-OBD)]
C
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EC
WITH CONSULT-II
1.
Turn ignition switch “ON”, and select “DATA MONITOR” mode with CONSULT-II.
2.
Start engine and warm it up to normal operating temperature.
3.
Turn ignition switch “OFF” and wait at least 10 seconds.
4.
Start engine again and drive at 1,500 to 3,000 rpm for at least 3
minutes.
Hold the accelerator pedal as steady as possible.
NOTE:
Refer to the freeze frame data for the test driving condi-
tions.
5.
If 1st trip DTC is detected, go to
EC-335, "Diagnostic Procedure"
.
WITH GST
Follow the procedure “WITH CONSULT-II” above.
Diagnostic Procedure
EBS00QN1
1.
CHECK FOR INTAKE AIR LEAK AND PCV HOSE
1.
Start engine and run it at idle speed.
2.
Listen for the sound of the intake air leak.
3.
Check PCV hose connection.
OK or NG
OK
>> GO TO 2.
NG
>> Repair or replace.
2.
CHECK FOR EXHAUST SYSTEM CLOGGING
Stop engine and visually check exhaust tube, three way catalyst and muffler for dents.
OK or NG
OK
>> GO TO 3.
NG
>> Repair or replace.
PBIB0164E
EC-336
[QG (WITH EURO-OBD)]
DTC P0300 - P0304 MULTIPLE CYLINDER MISFIRE, NO. 1 - 4 CYLINDER MIS-
FIRE
3.
PERFORM POWER BALANCE TEST
With CONSULT-II
1.
Perform “POWER BALANCE” in “ACTIVE TEST” mode.
2.
Is there any cylinder which does not produce a momentary
engine speed drop?
Without CONSULT-II
When disconnecting each injector harness connector one at a time,
is there any cylinder which does not produce a momentary engine
speed drop?
Yes or No
Yes
>> GO TO 4.
No
>> GO TO 7.
4.
CHECK INJECTOR
Does each injector make an operating sound at idle?
Yes or No
Yes
>> GO TO 5.
No
>> Check injector(s) and circuit(s). Refer to
.
5.
CHECK IGNITION SPARK
1.
Disconnect ignition coil assembly from rocker cover.
2.
Connect a known good spark plug to the ignition coil assembly.
3.
Place end of spark plug against a suitable ground and crank engine.
4.
Check for spark.
OK or NG
OK
>> GO TO 6.
NG
>> Check ignition coil, power transistor and their circuits.
Refer to
.
PBIB0133E
MBIB0101E
MEC703B
SEF575Q
DTC P0300 - P0304 MULTIPLE CYLINDER MISFIRE, NO. 1 - 4 CYLINDER MIS-
FIRE
EC-337
[QG (WITH EURO-OBD)]
C
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EC
6.
CHECK SPARK PLUGS
Remove the spark plugs and check for fouling, etc.
OK or NG
OK
>> GO TO 7.
NG
>> Repair or replace spark plug(s) with standard type
one(s). For spark plug type, refer to
.
7.
CHECK COMPRESSION PRESSURE
Check compression pressure. Refer to
EM-60, "CHECKING COMPRESSION PRESSURE"
.
OK or NG
OK
>> GO TO 8.
NG
>> Check pistons, piston rings, valves, valve seats and cylinder head gaskets.
8.
CHECK FUEL PRESSURE
1.
Install all removed parts.
2.
Release fuel pressure to zero. Refer to
EC-52, "FUEL PRESSURE RELEASE"
.
3.
Install fuel pressure gauge and check fuel pressure. Refer to
.
OK or NG
OK
>> GO TO 9.
NG
>> Follow the construction of “FUEL PRESSURE CHECK”.
9.
CHECK IGNITION TIMING
Check the following items. Refer to
.
OK or NG
OK
>> GO TO 10.
NG
>> Follow the “Basic Inspection”.
10.
CHECK HEATED OXYGEN SENSOR 1
Refer to
EC-197, "Component Inspection"
(M/T models),
EC-205, "Component Inspection"
(A/T models).
OK or NG
OK
>> GO TO 12.
NG
>> GO TO 11.
SEF156I
Standard:
1,324 kPa (13.24 bar, 13.5 kg/cm
2
, 192 psi)/350 rpm
Minimum:
1,128 kPa (11.28 bar, 11.5 kg/cm
2
, 164 psi)/350 rpm
Difference between each
cylinder:
98 kPa (0.98 bar, 1.0 kg/cm
2
, 14 psi)/350 rpm
At idle: Approx. 350 kPa (3.5 bar, 3.57 kg/cm
2
, 51 psi)
Items
Specifications
Target idle speed
A/T
800
±
50 rpm (in “P” or “N” position)
M/T
700
±
50 rpm (in “Neutral” position)
Ignition timing
A/T
10
±
5
°
BTDC (in “P” or “N” position)
M/T
8
±
5
°
BTDC (in “Neutral” position)
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